* Copyright 1998 Owen Taylor
*
* This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Library General Public
+ * modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Library General Public License for more details.
+ * Lesser General Public License for more details.
*
- * You should have received a copy of the GNU Library General Public
+ * You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
+/*
+ * Modified by the GLib Team and others 1997-2000. See the AUTHORS
+ * file for a list of people on the GLib Team. See the ChangeLog
+ * files for a list of changes. These files are distributed with
+ * GLib at ftp://ftp.gtk.org/pub/gtk/.
+ */
+
/*
* MT safe
*/
#include "config.h"
+/* uncomment the next line to get poll() debugging info */
+/* #define G_MAIN_POLL_DEBUG */
+
#include "glib.h"
#include <sys/types.h>
#include <time.h>
#endif /* HAVE_UNISTD_H */
#include <errno.h>
-#ifdef NATIVE_WIN32
+#ifdef G_OS_WIN32
#define STRICT
#include <windows.h>
-#endif /* NATIVE_WIN32 */
+#endif /* G_OS_WIN32 */
-#ifdef _MSC_VER
-#include <fcntl.h>
-#include <io.h>
-#endif /* _MSC_VER */
+#ifdef G_OS_BEOS
+#include <net/socket.h>
+#endif /* G_OS_BEOS */
/* Types */
-typedef struct _GTimeoutData GTimeoutData;
-typedef struct _GSource GSource;
+typedef struct _GTimeoutSource GTimeoutSource;
typedef struct _GPollRec GPollRec;
+typedef struct _GSourceCallback GSourceCallback;
typedef enum
{
G_SOURCE_CAN_RECURSE = 1 << (G_HOOK_FLAG_USER_SHIFT + 1)
} GSourceFlags;
-struct _GSource
+struct _GMainContext
{
- GHook hook;
- gint priority;
- gpointer source_data;
+#ifdef G_THREADS_ENABLED
+ /* The following lock is used for both the list of sources
+ * and the list of poll records
+ */
+ GMutex *mutex;
+ GThread *thread;
+#endif
+
+ GPtrArray *pending_dispatches;
+ gint timeout; /* Timeout for current iteration */
+
+ guint next_id;
+ GSource *source_list;
+ gint in_check_or_prepare;
+
+ GPollRec *poll_records;
+ GPollRec *poll_free_list;
+ GMemChunk *poll_chunk;
+ guint n_poll_records;
+ GPollFD *cached_poll_array;
+ gint cached_poll_array_size;
+
+#ifdef G_THREADS_ENABLED
+#ifndef G_OS_WIN32
+/* this pipe is used to wake up the main loop when a source is added.
+ */
+ gint wake_up_pipe[2];
+#else /* G_OS_WIN32 */
+ HANDLE wake_up_semaphore;
+#endif /* G_OS_WIN32 */
+
+ GPollFD wake_up_rec;
+ gboolean poll_waiting;
+
+/* Flag indicating whether the set of fd's changed during a poll */
+ gboolean poll_changed;
+#endif /* G_THREADS_ENABLED */
+
+ GPollFunc poll_func;
+
+ GTimeVal current_time;
+ gboolean time_is_current;
+};
+
+struct _GSourceCallback
+{
+ guint ref_count;
+ GSourceFunc func;
+ gpointer data;
+ GDestroyNotify notify;
};
struct _GMainLoop
{
+ GMainContext *context;
gboolean is_running;
+ guint ref_count;
+
+#ifdef G_THREADS_ENABLED
+ GMutex *mutex;
+ GCond *sem_cond;
+#endif /* G_THREADS_ENABLED */
};
-struct _GTimeoutData
+struct _GTimeoutSource
{
+ GSource source;
GTimeVal expiration;
gint interval;
- GSourceFunc callback;
};
struct _GPollRec
GPollRec *next;
};
+#ifdef G_THREADS_ENABLED
+#define LOCK_CONTEXT(context) g_mutex_lock(context->mutex)
+#define UNLOCK_CONTEXT(context) g_mutex_unlock(context->mutex)
+#define LOCK_LOOP(loop) g_mutex_lock(loop->mutex)
+#define UNLOCK_LOOP(loop) g_mutex_unlock(loop->mutex)
+#else
+#define LOCK_CONTEXT(context) (void)0
+#define UNLOCK_CONTEXT(context) (void)0
+#define LOCK_LOOP(context) (void)0
+#define UNLOCK_LOOP(context) (void)0
+#endif
+
+#define SOURCE_DESTROYED(source) (((source)->flags & G_HOOK_FLAG_ACTIVE) == 0)
+
+#define SOURCE_UNREF(source, context) \
+ G_STMT_START { \
+ if ((source)->ref_count > 1) \
+ (source)->ref_count--; \
+ else \
+ g_source_unref_internal ((source), (context), TRUE); \
+ } G_STMT_END
+
+
/* Forward declarations */
-static gint g_source_compare (GHook *a,
- GHook *b);
-static void g_source_destroy_func (GHookList *hook_list,
- GHook *hook);
-static void g_main_poll (gint timeout,
- gboolean use_priority,
- gint priority);
-static void g_main_add_poll_unlocked (gint priority,
- GPollFD *fd);
-
-static gboolean g_timeout_prepare (gpointer source_data,
- GTimeVal *current_time,
- gint *timeout);
-static gboolean g_timeout_check (gpointer source_data,
- GTimeVal *current_time);
-static gboolean g_timeout_dispatch (gpointer source_data,
- GTimeVal *current_time,
- gpointer user_data);
-static gboolean g_idle_prepare (gpointer source_data,
- GTimeVal *current_time,
- gint *timeout);
-static gboolean g_idle_check (gpointer source_data,
- GTimeVal *current_time);
-static gboolean g_idle_dispatch (gpointer source_data,
- GTimeVal *current_time,
- gpointer user_data);
-
-/* Data */
-
-static GSList *pending_dispatches = NULL;
-static GHookList source_list = { 0 };
-static gint in_check_or_prepare = 0;
-
-/* The following lock is used for both the list of sources
- * and the list of poll records
- */
-G_LOCK_DECLARE_STATIC (main_loop);
+static void g_source_unref_internal (GSource *source,
+ GMainContext *context,
+ gboolean have_lock);
+static void g_source_destroy_internal (GSource *source,
+ GMainContext *context,
+ gboolean have_lock);
+static void g_main_context_poll (GMainContext *context,
+ gint timeout,
+ gint priority,
+ GPollFD *fds,
+ gint n_fds);
+static void g_main_context_add_poll_unlocked (GMainContext *context,
+ gint priority,
+ GPollFD *fd);
+static void g_main_context_remove_poll_unlocked (GMainContext *context,
+ GPollFD *fd);
+static void g_main_context_wakeup (GMainContext *context);
+
+static gboolean g_timeout_prepare (GSource *source,
+ gint *timeout);
+static gboolean g_timeout_check (GSource *source);
+static gboolean g_timeout_dispatch (GSource *source,
+ GSourceFunc callback,
+ gpointer user_data);
+static gboolean g_idle_prepare (GSource *source,
+ gint *timeout);
+static gboolean g_idle_check (GSource *source);
+static gboolean g_idle_dispatch (GSource *source,
+ GSourceFunc callback,
+ gpointer user_data);
+
+G_LOCK_DEFINE_STATIC (main_loop);
+static GMainContext *default_main_context;
static GSourceFuncs timeout_funcs =
{
g_timeout_prepare,
g_timeout_check,
g_timeout_dispatch,
- g_free,
+ NULL
};
static GSourceFuncs idle_funcs =
g_idle_prepare,
g_idle_check,
g_idle_dispatch,
- NULL,
+ NULL
};
-static GPollRec *poll_records = NULL;
-static GPollRec *poll_free_list = NULL;
-static GMemChunk *poll_chunk;
-static guint n_poll_records = 0;
-
-#ifdef G_THREADS_ENABLED
-#ifndef NATIVE_WIN32
-/* this pipe is used to wake up the main loop when a source is added.
- */
-static gint wake_up_pipe[2] = { -1, -1 };
-#else /* NATIVE_WIN32 */
-static HANDLE wake_up_semaphore = NULL;
-#endif /* NATIVE_WIN32 */
-static GPollFD wake_up_rec;
-static gboolean poll_waiting = FALSE;
-#endif /* G_THREADS_ENABLED */
-
#ifdef HAVE_POLL
-static GPollFunc poll_func = (GPollFunc) poll;
+/* SunOS has poll, but doesn't provide a prototype. */
+# if defined (sun) && !defined (__SVR4)
+extern gint poll (GPollFD *ufds, guint nfsd, gint timeout);
+# endif /* !sun */
#else /* !HAVE_POLL */
-#ifdef NATIVE_WIN32
+
+#ifdef G_OS_WIN32
static gint
-g_poll (GPollFD *fds, guint nfds, gint timeout)
+g_poll (GPollFD *fds,
+ guint nfds,
+ gint timeout)
{
HANDLE handles[MAXIMUM_WAIT_OBJECTS];
+ gboolean poll_msgs = FALSE;
GPollFD *f;
DWORD ready;
MSG msg;
UINT timer;
- LONG prevcnt;
- gint poll_msgs = -1;
gint nhandles = 0;
for (f = fds; f < &fds[nfds]; ++f)
if (f->fd >= 0)
{
if (f->events & G_IO_IN)
- if (f->fd == G_WIN32_MSG_HANDLE)
- poll_msgs = f - fds;
- else
- {
- /* g_print ("g_poll: waiting for handle %#x\n", f->fd); */
- handles[nhandles++] = (HANDLE) f->fd;
- }
+ {
+ if (f->fd == G_WIN32_MSG_HANDLE)
+ poll_msgs = TRUE;
+ else
+ {
+#ifdef G_MAIN_POLL_DEBUG
+ g_print ("g_poll: waiting for %#x\n", f->fd);
+#endif
+ handles[nhandles++] = (HANDLE) f->fd;
+ }
+ }
}
if (timeout == -1)
timeout = INFINITE;
- if (poll_msgs >= 0)
+ if (poll_msgs)
{
/* Waiting for messages, and maybe events */
if (nhandles == 0)
/* Waiting just for messages, infinite timeout
* -> Use PeekMessage, then WaitMessage
*/
- /* g_print ("WaitMessage, PeekMessage\n"); */
+#ifdef G_MAIN_POLL_DEBUG
+ g_print ("PeekMessage, then WaitMessage\n");
+#endif
if (PeekMessage (&msg, NULL, 0, 0, PM_NOREMOVE))
ready = WAIT_OBJECT_0;
else if (!WaitMessage ())
/* Waiting just for messages, zero timeout
* -> Use PeekMessage
*/
- /* g_print ("PeekMessage\n"); */
+#ifdef G_MAIN_POLL_DEBUG
+ g_print ("PeekMessage\n");
+#endif
if (PeekMessage (&msg, NULL, 0, 0, PM_NOREMOVE))
ready = WAIT_OBJECT_0;
else
* -> First try PeekMessage, then set a timer, wait for message,
* kill timer, use PeekMessage
*/
- /* g_print ("PeekMessage\n"); */
+#ifdef G_MAIN_POLL_DEBUG
+ g_print ("PeekMessage\n");
+#endif
if (PeekMessage (&msg, NULL, 0, 0, PM_NOREMOVE))
ready = WAIT_OBJECT_0;
else if ((timer = SetTimer (NULL, 0, timeout, NULL)) == 0)
g_warning ("g_poll: SetTimer failed");
else
{
- /* g_print ("WaitMessage\n"); */
+#ifdef G_MAIN_POLL_DEBUG
+ g_print ("WaitMessage\n");
+#endif
WaitMessage ();
KillTimer (NULL, timer);
- if (PeekMessage (&msg, NULL, 0, 0, PM_NOREMOVE))
+ if (PeekMessage (&msg, NULL, 0, 0, PM_NOREMOVE)
+ && msg.message != WM_TIMER)
ready = WAIT_OBJECT_0;
else
ready = WAIT_TIMEOUT;
/* Wait for either message or event
* -> Use MsgWaitForMultipleObjects
*/
- /* g_print ("MsgWaitForMultipleObjects(%d, %d)\n", nhandles, timeout); */
+#ifdef G_MAIN_POLL_DEBUG
+ g_print ("MsgWaitForMultipleObjects(%d, %d)\n", nhandles, timeout);
+#endif
ready = MsgWaitForMultipleObjects (nhandles, handles, FALSE,
timeout, QS_ALLINPUT);
- /* g_print("=%d\n", ready); */
+
if (ready == WAIT_FAILED)
g_warning ("g_poll: MsgWaitForMultipleObjects failed");
}
/* Wait for just events
* -> Use WaitForMultipleObjects
*/
- /* g_print ("WaitForMultipleObjects(%d, %d)\n", nhandles, timeout); */
+#ifdef G_MAIN_POLL_DEBUG
+ g_print ("WaitForMultipleObjects(%d, %d)\n", nhandles, timeout);
+#endif
ready = WaitForMultipleObjects (nhandles, handles, FALSE, timeout);
- /* g_print("=%d\n", ready); */
if (ready == WAIT_FAILED)
g_warning ("g_poll: WaitForMultipleObjects failed");
}
if (ready == WAIT_FAILED)
return -1;
- else if (poll_msgs >= 0 && ready == WAIT_OBJECT_0 + nhandles)
+ else if (ready == WAIT_TIMEOUT)
+ return 0;
+ else if (poll_msgs && ready == WAIT_OBJECT_0 + nhandles)
{
- fds[poll_msgs].revents |= G_IO_IN;
+ for (f = fds; f < &fds[nfds]; ++f)
+ if (f->fd >= 0)
+ {
+ if (f->events & G_IO_IN)
+ if (f->fd == G_WIN32_MSG_HANDLE)
+ f->revents |= G_IO_IN;
+ }
}
else if (ready >= WAIT_OBJECT_0 && ready < WAIT_OBJECT_0 + nhandles)
for (f = fds; f < &fds[nfds]; ++f)
&& f->fd == (gint) handles[ready - WAIT_OBJECT_0])
{
f->revents |= G_IO_IN;
- /* g_print ("event %#x\n", f->fd); */
+#ifdef G_MAIN_POLL_DEBUG
+ g_print ("g_poll: got event %#x\n", f->fd);
+#endif
+#if 0
ResetEvent ((HANDLE) f->fd);
+#endif
}
}
- if (ready == WAIT_TIMEOUT)
- return 0;
+ if (ready >= WAIT_OBJECT_0 && ready < WAIT_OBJECT_0 + nhandles)
+ return ready - WAIT_OBJECT_0 + 1;
else
- return 1;
+ return 0;
}
-#else /* !NATIVE_WIN32 */
+#else /* !G_OS_WIN32 */
/* The following implementation of poll() comes from the GNU C Library.
* Copyright (C) 1994, 1996, 1997 Free Software Foundation, Inc.
#ifdef HAVE_SYS_SELECT_H
#include <sys/select.h>
-#endif /* HAVE_SYS_SELECT_H_ */
+#endif /* HAVE_SYS_SELECT_H */
+
+#ifdef G_OS_BEOS
+#undef NO_FD_SET
+#endif /* G_OS_BEOS */
#ifndef NO_FD_SET
# define SELECT_MASK fd_set
return ready;
}
-#endif /* !NATIVE_WIN32 */
+#endif /* !G_OS_WIN32 */
-static GPollFunc poll_func = g_poll;
#endif /* !HAVE_POLL */
-/* Hooks for adding to the main loop */
-
-/* Use knowledge of insert_sorted algorithm here to make
- * sure we insert at the end of equal priority items
+/* Called to clean up when a thread terminates
*/
-static gint
-g_source_compare (GHook *a,
- GHook *b)
-{
- GSource *source_a = (GSource *)a;
- GSource *source_b = (GSource *)b;
-
- return (source_a->priority < source_b->priority) ? -1 : 1;
-}
-
-/* HOLDS: main_loop_lock */
static void
-g_source_destroy_func (GHookList *hook_list,
- GHook *hook)
+g_main_context_destroy (GMainContext *context)
{
- GSource *source = (GSource*) hook;
- GDestroyNotify destroy;
+ GSource *source;
- G_UNLOCK (main_loop);
+ /* We need the lock here only because g_source_destroy expects
+ * to be able to unlock when destroying the source's data
+ */
+ LOCK_CONTEXT (context);
+ source = context->source_list;
+ while (source)
+ {
+ GSource *next = source->next;
+ g_source_destroy_internal (source, context, TRUE);
+ source = next;
+ }
+ UNLOCK_CONTEXT (context);
- destroy = hook->destroy;
- if (destroy)
- destroy (hook->data);
+#ifdef G_THREADS_ENABLED
+ g_mutex_free (context->mutex);
+#endif
- destroy = ((GSourceFuncs*) hook->func)->destroy;
- if (destroy)
- destroy (source->source_data);
+ g_ptr_array_free (context->pending_dispatches, TRUE);
+ g_free (context->cached_poll_array);
+
+ g_mem_chunk_destroy (context->poll_chunk);
- G_LOCK (main_loop);
+#ifdef G_THREADS_ENABLED
+ if (g_thread_supported())
+ {
+#ifndef G_OS_WIN32
+ close (context->wake_up_pipe[0]);
+ close (context->wake_up_pipe[1]);
+#else
+ CloseHandle (context->wake_up_semaphore);
+#endif
+ }
+#endif
+
+ g_free (context);
}
-static void
-g_source_noop (GHookList *hook_list,
- GHook *hook)
+/**
+ * g_main_context_get:
+ * @thread: a #GThread
+ *
+ * Retrieves the main loop context for a particular thread. This
+ * will create the main context for the thread if none previously
+ * existed. The context will exist until the thread terminates.
+ *
+ * Return value: the main loop context for @thread.
+ **/
+GMainContext *
+g_main_context_get (GThread *thread)
{
-}
+ static GStaticPrivate private_key = G_STATIC_PRIVATE_INIT;
+ GMainContext *context;
-guint
-g_source_add (gint priority,
- gboolean can_recurse,
- GSourceFuncs *funcs,
- gpointer source_data,
- gpointer user_data,
- GDestroyNotify notify)
-{
- guint return_val;
- GSource *source;
+ g_return_val_if_fail (thread != NULL, NULL);
- G_LOCK (main_loop);
+ if (g_thread_supported ())
+ context = g_static_private_get_for_thread (&private_key, thread);
+ else
+ context = default_main_context;
- if (!source_list.is_setup)
- g_hook_list_init (&source_list, sizeof(GSource));
+ if (!context)
+ {
+ context = g_new0 (GMainContext, 1);
- source_list.hook_destroy = g_source_noop;
- source_list.hook_free = g_source_destroy_func;
+#ifdef G_THREADS_ENABLED
+ if (g_thread_supported ())
+ context->mutex = g_mutex_new();
- source = (GSource *)g_hook_alloc (&source_list);
- source->priority = priority;
- source->source_data = source_data;
- source->hook.func = funcs;
- source->hook.data = user_data;
- source->hook.destroy = notify;
-
- g_hook_insert_sorted (&source_list,
- (GHook *)source,
- g_source_compare);
+ context->thread = thread;
+#endif
+
+ context->next_id = 1;
+
+ context->source_list = NULL;
- if (can_recurse)
- source->hook.flags |= G_SOURCE_CAN_RECURSE;
+#if HAVE_POLL
+ context->poll_func = (GPollFunc)poll;
+#else
+ context->poll_func = g_poll;
+#endif
- return_val = source->hook.hook_id;
+ context->cached_poll_array = NULL;
+ context->cached_poll_array_size = 0;
+
+ context->pending_dispatches = g_ptr_array_new ();
+
+ context->time_is_current = FALSE;
#ifdef G_THREADS_ENABLED
- /* Now wake up the main loop if it is waiting in the poll() */
-
- if (poll_waiting)
- {
- poll_waiting = FALSE;
-#ifndef NATIVE_WIN32
- write (wake_up_pipe[1], "A", 1);
+ if (g_thread_supported ())
+ {
+#ifndef G_OS_WIN32
+ if (pipe (context->wake_up_pipe) < 0)
+ g_error ("Cannot create pipe main loop wake-up: %s\n",
+ g_strerror (errno));
+
+ context->wake_up_rec.fd = context->wake_up_pipe[0];
+ context->wake_up_rec.events = G_IO_IN;
+ g_main_context_add_poll_unlocked (context, 0, &context->wake_up_rec);
#else
- ReleaseSemaphore (wake_up_semaphore, 1, NULL);
+ if ((context->wake_up_semaphore = CreateSemaphore (NULL, 0, 100, NULL)) == NULL)
+ g_error ("Cannot create wake-up semaphore: %s", g_win32_error_message (GetLastError ()));
+ context->wake_up_rec.fd = (gint) context->wake_up_semaphore;
+ context->wake_up_rec.events = G_IO_IN;
+#ifdef G_MAIN_POLL_DEBUG
+ g_print ("wake-up semaphore: %#x\n", (guint) context->wake_up_semaphore);
#endif
- }
+ g_main_context_add_poll_unlocked (context, 0, &context->wake_up_rec);
#endif
- G_UNLOCK (main_loop);
+ }
+#endif
+
+ if (g_thread_supported ())
+ g_static_private_set_for_thread (&private_key, thread,
+ context,
+ (GDestroyNotify)g_main_context_destroy);
+ else
+ default_main_context = context;
+ }
- return return_val;
+ return context;
}
-gboolean
-g_source_remove (guint tag)
+/**
+ * g_main_context_default:
+ *
+ * Return the default main context. This is the main context used
+ * for main loop functions when a main loop is not explicitly
+ * specified.
+ *
+ * Return value: the default main context.
+ **/
+GMainContext *
+g_main_context_default (void)
{
- GHook *hook;
-
- g_return_val_if_fail (tag > 0, FALSE);
-
+ /* Slow, but safe */
+
G_LOCK (main_loop);
- hook = g_hook_get (&source_list, tag);
- if (hook)
- g_hook_destroy_link (&source_list, hook);
+ if (!default_main_context)
+ default_main_context = g_main_context_get (g_thread_self ());
G_UNLOCK (main_loop);
- return hook != NULL;
+ return default_main_context;
}
-gboolean
-g_source_remove_by_user_data (gpointer user_data)
+/* Hooks for adding to the main loop */
+
+/**
+ * g_source_new:
+ * @source_funcs: structure containing functions that implement
+ * the sources behavior.
+ * @struct_size: size of the #GSource structure to create
+ *
+ * Create a new GSource structure. The size is specified to
+ * allow creating structures derived from GSource that contain
+ * additional data. The size passed in must be at least
+ * sizeof(GSource).
+ *
+ * The source will not initially be associated with any #GMainContext
+ * and must be added to one with g_source_add() before it will be
+ * executed.
+ *
+ * Return value: the newly create #GSource
+ **/
+GSource *
+g_source_new (GSourceFuncs *source_funcs,
+ guint struct_size)
{
- GHook *hook;
+ GSource *source;
+
+ g_return_val_if_fail (source_funcs != NULL, NULL);
+ g_return_val_if_fail (struct_size >= sizeof (GSource), NULL);
- G_LOCK (main_loop);
+ source = (GSource*) g_malloc0 (struct_size);
+
+ source->source_funcs = source_funcs;
+ source->ref_count = 1;
- hook = g_hook_find_data (&source_list, TRUE, user_data);
- if (hook)
- g_hook_destroy_link (&source_list, hook);
+ source->priority = G_PRIORITY_DEFAULT;
- G_UNLOCK (main_loop);
+ source->flags = G_HOOK_FLAG_ACTIVE;
- return hook != NULL;
+ /* NULL/0 initialization for all other fields */
+
+ return source;
}
-static gboolean
-g_source_find_source_data (GHook *hook,
- gpointer data)
+/* Holds context's lock
+ */
+static void
+g_source_list_add (GSource *source,
+ GMainContext *context)
{
- GSource *source = (GSource *)hook;
+ GSource *tmp_source, *last_source;
+
+ last_source = NULL;
+ tmp_source = context->source_list;
+ while (tmp_source && tmp_source->priority <= source->priority)
+ {
+ last_source = tmp_source;
+ tmp_source = tmp_source->next;
+ }
- return (source->source_data == data);
+ source->next = tmp_source;
+ if (tmp_source)
+ tmp_source->prev = source;
+
+ source->prev = last_source;
+ if (last_source)
+ last_source->next = source;
+ else
+ context->source_list = source;
}
-gboolean
-g_source_remove_by_source_data (gpointer source_data)
+/* Holds context's lock
+ */
+static void
+g_source_list_remove (GSource *source,
+ GMainContext *context)
{
- GHook *hook;
-
- G_LOCK (main_loop);
-
- hook = g_hook_find (&source_list, TRUE,
- g_source_find_source_data, source_data);
- if (hook)
- g_hook_destroy_link (&source_list, hook);
+ if (source->prev)
+ source->prev->next = source->next;
+ else
+ context->source_list = source->next;
- G_UNLOCK (main_loop);
+ if (source->next)
+ source->next->prev = source->prev;
- return hook != NULL;
+ source->prev = NULL;
+ source->next = NULL;
}
-static gboolean
-g_source_find_funcs_user_data (GHook *hook,
- gpointer data)
+/**
+ * g_source_attach:
+ * @source: a #GSource
+ * @context: a #GMainContext (if %NULL, the default context will be used)
+ *
+ * Adds a #GSource to a @context so that it will be executed within
+ * that context.
+ *
+ * Return value: the ID for the source within the #GMainContext
+ **/
+guint
+g_source_attach (GSource *source,
+ GMainContext *context)
{
- gpointer *d = data;
+ guint result = 0;
+ GSList *tmp_list;
- return hook->func == d[0] && hook->data == d[1];
-}
+ g_return_val_if_fail (source->context == NULL, 0);
+ g_return_val_if_fail (!SOURCE_DESTROYED (source), 0);
+
+ if (!context)
+ context = g_main_context_default ();
-gboolean
-g_source_remove_by_funcs_user_data (GSourceFuncs *funcs,
- gpointer user_data)
-{
- gpointer d[2];
- GHook *hook;
+ LOCK_CONTEXT (context);
- g_return_val_if_fail (funcs != NULL, FALSE);
+ source->context = context;
+ result = source->id = context->next_id++;
- G_LOCK (main_loop);
+ source->ref_count++;
+ g_source_list_add (source, context);
- d[0] = funcs;
- d[1] = user_data;
+ tmp_list = source->poll_fds;
+ while (tmp_list)
+ {
+ g_main_context_add_poll_unlocked (context, source->priority, tmp_list->data);
+ tmp_list = tmp_list->next;
+ }
- hook = g_hook_find (&source_list, TRUE,
- g_source_find_funcs_user_data, d);
- if (hook)
- g_hook_destroy_link (&source_list, hook);
+#ifdef G_THREADS_ENABLED
+ /* Now wake up the main loop if it is waiting in the poll() */
+ g_main_context_wakeup (context);
+#endif
- G_UNLOCK (main_loop);
+ UNLOCK_CONTEXT (context);
- return hook != NULL;
+ return result;
}
-void
-g_get_current_time (GTimeVal *result)
+static void
+g_source_destroy_internal (GSource *source,
+ GMainContext *context,
+ gboolean have_lock)
{
-#ifndef _MSC_VER
- struct timeval r;
- g_return_if_fail (result != NULL);
+ if (!have_lock)
+ LOCK_CONTEXT (context);
+
+ if (!SOURCE_DESTROYED (source))
+ {
+ GSList *tmp_list;
+ gpointer old_cb_data;
+ GSourceCallbackFuncs *old_cb_funcs;
+
+ source->flags &= ~G_HOOK_FLAG_ACTIVE;
- /*this is required on alpha, there the timeval structs are int's
- not longs and a cast only would fail horribly*/
- gettimeofday (&r, NULL);
- result->tv_sec = r.tv_sec;
- result->tv_usec = r.tv_usec;
-#else
- /* Avoid calling time() except for the first time.
- * GetTickCount() should be pretty fast and low-level?
- * I could also use ftime() but it seems unnecessarily overheady.
- */
- static DWORD start_tick = 0;
- static time_t start_time;
- DWORD tick;
- time_t t;
+ old_cb_data = source->callback_data;
+ old_cb_funcs = source->callback_funcs;
- g_return_if_fail (result != NULL);
-
- if (start_tick == 0)
- {
- start_tick = GetTickCount ();
- time (&start_time);
- }
+ source->callback_data = NULL;
+ source->callback_funcs = NULL;
- tick = GetTickCount ();
+ if (old_cb_funcs)
+ {
+ UNLOCK_CONTEXT (context);
+ old_cb_funcs->unref (old_cb_data);
+ LOCK_CONTEXT (context);
+ }
+
+ tmp_list = source->poll_fds;
+ while (tmp_list)
+ {
+ g_main_context_remove_poll_unlocked (context, tmp_list->data);
+ tmp_list = tmp_list->next;
+ }
+
+ g_source_unref_internal (source, context, TRUE);
+ }
- result->tv_sec = (tick - start_tick) / 1000 + start_time;
- result->tv_usec = ((tick - start_tick) % 1000) * 1000;
-#endif
+ if (!have_lock)
+ UNLOCK_CONTEXT (context);
}
-/* Running the main loop */
+/**
+ * g_source_destroy:
+ * @source: a #GSource
+ *
+ * Remove a source from its #GMainContext, if any, and mark it as
+ * destroyed. The source cannot be subsequently added to another
+ * context.
+ **/
+void
+g_source_destroy (GSource *source)
+{
+ GMainContext *context;
+
+ g_return_if_fail (source != NULL);
+
+ context = source->context;
+
+ if (context)
+ g_source_destroy_internal (source, context, FALSE);
+ else
+ source->flags &= ~G_HOOK_FLAG_ACTIVE;
+}
-/* HOLDS: main_loop_lock */
-static void
-g_main_dispatch (GTimeVal *current_time)
+/**
+ * g_source_get_id:
+ * @source: a #GSource
+ *
+ * Return the numeric ID for a particular source. The ID of a source
+ * is unique within a particular main loop context. The reverse
+ * mapping from ID to source is done by g_main_context_find_source_by_id().
+ *
+ * Return value: the ID for the source
+ **/
+guint
+g_source_get_id (GSource *source)
{
- while (pending_dispatches != NULL)
- {
- gboolean need_destroy;
- GSource *source = pending_dispatches->data;
- GSList *tmp_list;
+ guint result;
+
+ g_return_val_if_fail (source != NULL, 0);
+ g_return_val_if_fail (source->context != NULL, 0);
- tmp_list = pending_dispatches;
- pending_dispatches = g_slist_remove_link (pending_dispatches, pending_dispatches);
- g_slist_free_1 (tmp_list);
+ LOCK_CONTEXT (source->context);
+ result = source->id;
+ UNLOCK_CONTEXT (source->context);
+
+ return result;
+}
- if (G_HOOK_IS_VALID (source))
- {
- gboolean was_in_call;
- gpointer hook_data = source->hook.data;
- gpointer source_data = source->source_data;
- gboolean (*dispatch) (gpointer,
- GTimeVal *,
- gpointer);
+/**
+ * g_source_get_context:
+ * @source: a #GSource
+ *
+ * Get the #GMainContext with which the source is associated.
+ * Calling this function on a destroyed source is an error.
+ *
+ * Return value: the #GMainContext with which the source is associated,
+ * or %NULL if the context has not yet been added
+ * to a source.
+ **/
+GMainContext *
+g_source_get_context (GSource *source)
+{
+ g_return_val_if_fail (!SOURCE_DESTROYED (source), NULL);
- dispatch = ((GSourceFuncs *) source->hook.func)->dispatch;
-
- was_in_call = G_HOOK_IN_CALL (source);
- source->hook.flags |= G_HOOK_FLAG_IN_CALL;
+ return source->context;
+}
- G_UNLOCK (main_loop);
- need_destroy = ! dispatch (source_data,
- current_time,
- hook_data);
- G_LOCK (main_loop);
+/**
+ * g_main_source_add_poll:
+ * @source:a #GSource
+ * @fd: a #GPollFD structure holding information about a file
+ * descriptor to watch.
+ *
+ * Add a file descriptor to the set of file descriptors polled * for
+ * this source. This is usually combined with g_source_new() to add an
+ * event source. The event source's check function will typically test
+ * the revents field in the #GPollFD struct and return %TRUE if events need
+ * to be processed.
+ **/
+void
+g_source_add_poll (GSource *source,
+ GPollFD *fd)
+{
+ GMainContext *context;
+
+ g_return_if_fail (source != NULL);
+ g_return_if_fail (fd != NULL);
+ g_return_if_fail (!SOURCE_DESTROYED (source));
+
+ context = source->context;
- if (!was_in_call)
- source->hook.flags &= ~G_HOOK_FLAG_IN_CALL;
-
- if (need_destroy && G_HOOK_IS_VALID (source))
- g_hook_destroy_link (&source_list, (GHook *) source);
- }
+ if (context)
+ LOCK_CONTEXT (context);
+
+ source->poll_fds = g_slist_prepend (source->poll_fds, fd);
- g_hook_unref (&source_list, (GHook*) source);
+ if (context)
+ {
+ g_main_context_add_poll_unlocked (context, source->priority, fd);
+ UNLOCK_CONTEXT (context);
}
}
-/* g_main_iterate () runs a single iteration of the mainloop, or,
- * if !dispatch checks to see if any sources need dispatching.
- * basic algorithm for dispatch=TRUE:
- *
- * 1) while the list of currently pending sources is non-empty,
- * we call (*dispatch) on those that are !IN_CALL or can_recurse,
- * removing sources from the list after each returns.
- * the return value of (*dispatch) determines whether the source
- * itself is kept alive.
- *
- * 2) call (*prepare) for sources that are not yet SOURCE_READY and
- * are !IN_CALL or can_recurse. a return value of TRUE determines
- * that the source would like to be dispatched immediatedly, it
- * is then flagged as SOURCE_READY.
- *
- * 3) poll with the pollfds from all sources at the priority of the
- * first source flagged as SOURCE_READY. if there are any sources
- * flagged as SOURCE_READY, we use a timeout of 0 or the minimum
- * of all timouts otherwise.
- *
- * 4) for each source !IN_CALL or can_recurse, if SOURCE_READY or
- * (*check) returns true, add the source to the pending list.
- * once one source returns true, stop after checking all sources
- * at that priority.
- *
- * 5) while the list of currently pending sources is non-empty,
- * call (*dispatch) on each source, removing the source
- * after the call.
- *
- */
-static gboolean
-g_main_iterate (gboolean block,
- gboolean dispatch)
+/**
+ * g_source_set_callback_indirect:
+ * @source: the source
+ * @callback_data: pointer to callback data "object"
+ * @callback_funcs: functions for reference counting callback_data
+ * and getting the callback and data
+ *
+ * Set the callback function storing the data as a refcounted callback
+ * "object". This is used to implement g_source_set_callback_closure()
+ * and internally. Note that calling g_source_set_callback_indirect() assumes
+ * an initial reference count on @callback_data, and thus
+ * @callback_funcs->unref will eventually be called once more
+ * than @callback_funcs->ref.
+ **/
+void
+g_source_set_callback_indirect (GSource *source,
+ gpointer callback_data,
+ GSourceCallbackFuncs *callback_funcs)
{
- GHook *hook;
- GTimeVal current_time ={ 0, 0 };
- gint n_ready = 0;
- gint current_priority = 0;
- gint timeout;
- gboolean retval = FALSE;
+ GMainContext *context;
+ gpointer old_cb_data;
+ GSourceCallbackFuncs *old_cb_funcs;
+
+ g_return_if_fail (source != NULL);
+ g_return_if_fail (callback_funcs != NULL || callback_data == NULL);
- g_return_val_if_fail (!block || dispatch, FALSE);
+ context = source->context;
- g_get_current_time (¤t_time);
+ if (context)
+ LOCK_CONTEXT (context);
- G_LOCK (main_loop);
+ old_cb_data = source->callback_data;
+ old_cb_funcs = source->callback_funcs;
+
+ source->callback_data = callback_data;
+ source->callback_funcs = callback_funcs;
- /* If recursing, finish up current dispatch, before starting over */
- if (pending_dispatches)
- {
- if (dispatch)
- g_main_dispatch (¤t_time);
-
- G_UNLOCK (main_loop);
+ if (context)
+ UNLOCK_CONTEXT (context);
+
+ if (old_cb_funcs)
+ old_cb_funcs->unref (old_cb_data);
+}
- return TRUE;
- }
+static void
+g_source_callback_ref (gpointer cb_data)
+{
+ GSourceCallback *callback = cb_data;
- /* Prepare all sources */
+ callback->ref_count++;
+}
+
+
+static void
+g_source_callback_unref (gpointer cb_data)
+{
+ GSourceCallback *callback = cb_data;
+
+ callback->ref_count--;
+ if (callback->ref_count == 0)
+ {
+ if (callback->notify)
+ callback->notify (callback->data);
+ }
+}
+
+static void
+g_source_callback_get (gpointer cb_data,
+ GSourceFunc *func,
+ gpointer *data)
+{
+ GSourceCallback *callback = cb_data;
+
+ *func = callback->func;
+ *data = callback->data;
+}
+
+static GSourceCallbackFuncs g_source_callback_funcs = {
+ g_source_callback_ref,
+ g_source_callback_unref,
+ g_source_callback_get,
+};
+
+/**
+ * g_source_set_callback:
+ * @source: the source
+ * @func: a callback function
+ * @data: the data to pass to callback function
+ * @notify: a function to call when @data is no longer in use, or %NULL.
+ *
+ * Set the callback function for a source.
+ **/
+void
+g_source_set_callback (GSource *source,
+ GSourceFunc func,
+ gpointer data,
+ GDestroyNotify notify)
+{
+ GSourceCallback *new_callback;
+
+ g_return_if_fail (source != NULL);
+
+ new_callback = g_new (GSourceCallback, 1);
+
+ new_callback->func = func;
+ new_callback->data = data;
+ new_callback->notify = notify;
+
+ g_source_set_callback_indirect (source, new_callback, &g_source_callback_funcs);
+}
+
+/**
+ * g_source_set_priority:
+ * @source: a #GSource
+ * @priority: the new priority.
+ *
+ * Set the priority of a source. While the main loop is being
+ * run, a source will
+ **/
+void
+g_source_set_priority (GSource *source,
+ gint priority)
+{
+ GSList *tmp_list;
+ GMainContext *context;
+
+ g_return_if_fail (source != NULL);
+
+ context = source->context;
+
+ if (context)
+ LOCK_CONTEXT (context);
+
+ source->priority = priority;
+
+ if (context)
+ {
+ source->next = NULL;
+ source->prev = NULL;
+
+ tmp_list = source->poll_fds;
+ while (tmp_list)
+ {
+ g_main_context_remove_poll_unlocked (context, tmp_list->data);
+ g_main_context_add_poll_unlocked (context, priority, tmp_list->data);
+
+ tmp_list = tmp_list->next;
+ }
+
+ UNLOCK_CONTEXT (source->context);
+ }
+}
+
+/**
+ * g_source_get_priority:
+ * @source: a #GSource
+ *
+ * Gets the priority of a surce
+ *
+ * Return value: the priority of the source
+ **/
+gint
+g_source_get_priority (GSource *source)
+{
+ g_return_val_if_fail (source != NULL, 0);
+
+ return source->priority;
+}
+
+/**
+ * g_source_set_can_recurse:
+ * @source: a #GSource
+ * @can_recurse: whether recursion is allowed for this source
+ *
+ * Sets whether a source can be called recursively. If @can_recurse is
+ * %TRUE, then while the source is being dispatched then this source
+ * will be processed normally. Otherwise, all processing of this
+ * source is blocked until the dispatch function returns.
+ **/
+void
+g_source_set_can_recurse (GSource *source,
+ gboolean can_recurse)
+{
+ GMainContext *context;
+
+ g_return_if_fail (source != NULL);
+
+ context = source->context;
+
+ if (context)
+ LOCK_CONTEXT (context);
+
+ if (can_recurse)
+ source->flags |= G_SOURCE_CAN_RECURSE;
+ else
+ source->flags &= ~G_SOURCE_CAN_RECURSE;
+
+ if (context)
+ UNLOCK_CONTEXT (context);
+}
+
+/**
+ * g_source_get_can_recurse:
+ * @source: a #GSource
+ *
+ * Checks whether a source is allowed to be called recursively.
+ * see g_source_set_can_recurse.
+ *
+ * Return value: whether recursion is allowed.
+ **/
+gboolean
+g_source_get_can_recurse (GSource *source)
+{
+ g_return_val_if_fail (source != NULL, FALSE);
+
+ return (source->flags & G_SOURCE_CAN_RECURSE) != 0;
+}
+
+/**
+ * g_source_ref:
+ * @source: a #GSource
+ *
+ * Increases the reference count on a source by one.
+ *
+ * Return value: @source
+ **/
+GSource *
+g_source_ref (GSource *source)
+{
+ GMainContext *context;
+
+ g_return_val_if_fail (source != NULL, NULL);
+
+ context = source->context;
+
+ if (context)
+ LOCK_CONTEXT (context);
+
+ source->ref_count++;
+
+ if (context)
+ UNLOCK_CONTEXT (context);
+
+ return source;
+}
+
+/* g_source_unref() but possible to call within context lock
+ */
+static void
+g_source_unref_internal (GSource *source,
+ GMainContext *context,
+ gboolean have_lock)
+{
+ gpointer old_cb_data = NULL;
+ GSourceCallbackFuncs *old_cb_funcs = NULL;
+
+ g_return_if_fail (source != NULL);
+
+ if (!have_lock && context)
+ LOCK_CONTEXT (context);
+
+ source->ref_count--;
+ if (source->ref_count == 0)
+ {
+ old_cb_data = source->callback_data;
+ old_cb_funcs = source->callback_funcs;
+
+ source->callback_data = NULL;
+ source->callback_funcs = NULL;
+
+ if (context && !SOURCE_DESTROYED (source))
+ {
+ g_warning (G_STRLOC ": ref_count == 0, but source is still attached to a context!");
+ source->ref_count++;
+ }
+ else if (context)
+ g_source_list_remove (source, context);
+
+ if (source->source_funcs->destroy)
+ source->source_funcs->destroy (source);
+
+ g_slist_free (source->poll_fds);
+ source->poll_fds = NULL;
+ g_free (source);
+ }
+
+ if (!have_lock && context)
+ UNLOCK_CONTEXT (context);
+
+ if (old_cb_funcs)
+ {
+ if (have_lock)
+ UNLOCK_CONTEXT (context);
+
+ old_cb_funcs->unref (old_cb_data);
+
+ if (have_lock)
+ LOCK_CONTEXT (context);
+ }
+}
+
+/**
+ * g_source_unref:
+ * @source: a #GSource
+ *
+ * Decreases the reference count of a source by one. If the
+ * resulting reference count is zero the source and associated
+ * memory will be destroyed.
+ **/
+void
+g_source_unref (GSource *source)
+{
+ g_return_if_fail (source != NULL);
+
+ g_source_unref_internal (source, source->context, FALSE);
+}
+
+/**
+ * g_main_context_find_source_by_id:
+ * @context: a #GMainContext (if %NULL, the default context will be used)
+ * @id: the source ID, as returned by g_source_get_id()
+ *
+ * Finds a #GSource given a pair of context and ID
+ *
+ * Return value: the #GSource if found, otherwise, %NULL
+ **/
+GSource *
+g_main_context_find_source_by_id (GMainContext *context,
+ guint id)
+{
+ GSource *source;
+
+ g_return_val_if_fail (id > 0, FALSE);
+
+ if (context == NULL)
+ context = g_main_context_default ();
+
+ LOCK_CONTEXT (context);
+
+ source = context->source_list;
+ while (source)
+ {
+ if (!SOURCE_DESTROYED (source) &&
+ source->id == id)
+ break;
+ source = source->next;
+ }
+
+ UNLOCK_CONTEXT (context);
+
+ return source;
+}
+
+/**
+ * g_main_context_find_source_by_funcs_user_data:
+ * @context: a #GMainContext (if %NULL, the default context will be used).
+ * @funcs: the @source_funcs passed to g_source_new().
+ * @user_data: the user data from the callback.
+ *
+ * Finds a source with the given source functions and user data. If
+ * multiple sources exist with the same source function and user data,
+ * the first one found will be returned.
+ *
+ * Return value: the source, if one was found, otherwise %NULL
+ **/
+GSource *
+g_main_context_find_source_by_funcs_user_data (GMainContext *context,
+ GSourceFuncs *funcs,
+ gpointer user_data)
+{
+ GSource *source;
+
+ g_return_val_if_fail (funcs != NULL, FALSE);
+
+ if (context == NULL)
+ context = g_main_context_default ();
+
+ LOCK_CONTEXT (context);
+
+ source = context->source_list;
+ while (source)
+ {
+ if (!SOURCE_DESTROYED (source) &&
+ source->source_funcs == funcs &&
+ source->callback_data == user_data)
+ break;
+ source = source->next;
+ }
+
+ UNLOCK_CONTEXT (context);
+
+ return source;
+}
+
+/**
+ * g_main_context_find_source_by_user_data:
+ * @context: a #GMainContext
+ * @user_data: the user_data for the callback.
+ *
+ * Finds a source with the given user data for the callback. If
+ * multiple sources exist with the same user data, the first
+ * one found will be returned.
+ *
+ * Return value: the source, if one was found, otherwise %NULL
+ **/
+GSource *
+g_main_context_find_source_by_user_data (GMainContext *context,
+ gpointer user_data)
+{
+ GSource *source;
+
+ if (context == NULL)
+ context = g_main_context_default ();
+
+ LOCK_CONTEXT (context);
+
+ source = context->source_list;
+ while (source)
+ {
+ if (!SOURCE_DESTROYED (source) &&
+ source->callback_data == user_data)
+ break;
+ source = source->next;
+ }
+
+ UNLOCK_CONTEXT (context);
+
+ return source;
+}
+
+/**
+ * g_source_remove:
+ * @tag: the id of the source to remove.
+ *
+ * Removes the source with the given id from the default main
+ * context. The id of a #GSource is given by g_source_get_id(),
+ * or will be returned by the functions g_source_attach(),
+ * g_idle_add(), g_idle_add_full(), g_timeout_add(),
+ * g_timeout_add_full(), g_io_add_watch, and g_io_add_watch_full().
+ *
+ * See also g_source_destroy().
+ *
+ * Return value: %TRUE if the source was found and removed.
+ **/
+gboolean
+g_source_remove (guint tag)
+{
+ GSource *source;
+
+ g_return_val_if_fail (tag > 0, FALSE);
+
+ source = g_main_context_find_source_by_id (NULL, tag);
+ if (source)
+ g_source_destroy (source);
+
+ return source != NULL;
+}
+
+/**
+ * g_source_remove_by_user_data:
+ * @user_data: the user_data for the callback.
+ *
+ * Removes a source from the default main loop context given the user
+ * data for the callback. If multiple sources exist with the same user
+ * data, only one will be destroyed.
+ *
+ * Return value: %TRUE if a source was found and removed.
+ **/
+gboolean
+g_source_remove_by_user_data (gpointer user_data)
+{
+ GSource *source;
+
+ source = g_main_context_find_source_by_user_data (NULL, user_data);
+ if (source)
+ {
+ g_source_destroy (source);
+ return TRUE;
+ }
+ else
+ return FALSE;
+}
+
+/**
+ * g_source_remove_by_funcs_user_data:
+ * @funcs: The @source_funcs passed to g_source_new()
+ * @user_data: the user data for the callback
+ *
+ * Removes a source from the default main loop context given the
+ * source functions and user data. If multiple sources exist with the
+ * same source functions and user data, only one will be destroyed.
+ *
+ * Return value: %TRUE if a source was found and removed.
+ **/
+gboolean
+g_source_remove_by_funcs_user_data (GSourceFuncs *funcs,
+ gpointer user_data)
+{
+ GSource *source;
+
+ g_return_val_if_fail (funcs != NULL, FALSE);
+
+ source = g_main_context_find_source_by_funcs_user_data (NULL, funcs, user_data);
+ if (source)
+ {
+ g_source_destroy (source);
+ return TRUE;
+ }
+ else
+ return FALSE;
+}
+
+/**
+ * g_get_current_time:
+ * @result: #GTimeVal structure in which to store current time.
+ *
+ * Equivalent to Unix's <function>gettimeofday()</function>, but portable
+ **/
+void
+g_get_current_time (GTimeVal *result)
+{
+#ifndef G_OS_WIN32
+ struct timeval r;
+
+ g_return_if_fail (result != NULL);
+
+ /*this is required on alpha, there the timeval structs are int's
+ not longs and a cast only would fail horribly*/
+ gettimeofday (&r, NULL);
+ result->tv_sec = r.tv_sec;
+ result->tv_usec = r.tv_usec;
+#else
+ /* Avoid calling time() except for the first time.
+ * GetTickCount() should be pretty fast and low-level?
+ * I could also use ftime() but it seems unnecessarily overheady.
+ */
+ static DWORD start_tick = 0;
+ static time_t start_time;
+ DWORD tick;
+
+ g_return_if_fail (result != NULL);
+
+ if (start_tick == 0)
+ {
+ start_tick = GetTickCount ();
+ time (&start_time);
+ }
+
+ tick = GetTickCount ();
+
+ result->tv_sec = (tick - start_tick) / 1000 + start_time;
+ result->tv_usec = ((tick - start_tick) % 1000) * 1000;
+#endif
+}
+
+/* Running the main loop */
+
+/* HOLDS: context's lock */
+static void
+g_main_dispatch (GMainContext *context)
+{
+ gint i;
+
+ for (i = 0; i < context->pending_dispatches->len; i++)
+ {
+ GSource *source = context->pending_dispatches->pdata[i];
+
+ context->pending_dispatches->pdata[i] = NULL;
+ g_assert (source);
+
+ source->flags &= ~G_SOURCE_READY;
+
+ if (!SOURCE_DESTROYED (source))
+ {
+ gboolean was_in_call;
+ gpointer user_data = NULL;
+ GSourceFunc callback = NULL;
+ GSourceCallbackFuncs *cb_funcs;
+ gpointer cb_data;
+ gboolean need_destroy;
+
+ gboolean (*dispatch) (GSource *,
+ GSourceFunc,
+ gpointer);
+
+ dispatch = source->source_funcs->dispatch;
+ cb_funcs = source->callback_funcs;
+ cb_data = source->callback_data;
+
+ if (cb_funcs)
+ cb_funcs->ref (cb_data);
+
+ was_in_call = source->flags & G_HOOK_FLAG_IN_CALL;
+ source->flags |= G_HOOK_FLAG_IN_CALL;
+
+ UNLOCK_CONTEXT (context);
+
+ if (cb_funcs)
+ cb_funcs->get (cb_data, &callback, &user_data);
+
+ need_destroy = ! dispatch (source,
+ callback,
+ user_data);
+ LOCK_CONTEXT (context);
+
+ if (cb_funcs)
+ cb_funcs->unref (cb_data);
+
+ if (!was_in_call)
+ source->flags &= ~G_HOOK_FLAG_IN_CALL;
+
+ /* Note: this depends on the fact that we can't switch
+ * sources from one main context to another
+ */
+ if (need_destroy && !SOURCE_DESTROYED (source))
+ {
+ g_assert (source->context == context);
+ g_source_destroy_internal (source, context, TRUE);
+ }
+ }
+
+ SOURCE_UNREF (source, context);
+ }
- timeout = block ? -1 : 0;
+ g_ptr_array_set_size (context->pending_dispatches, 0);
+}
+
+/* Holds context's lock */
+static inline GSource *
+next_valid_source (GMainContext *context,
+ GSource *source)
+{
+ GSource *new_source = source ? source->next : context->source_list;
+
+ while (new_source)
+ {
+ if (!SOURCE_DESTROYED (new_source))
+ {
+ new_source->ref_count++;
+ break;
+ }
+
+ new_source = new_source->next;
+ }
+
+ if (source)
+ SOURCE_UNREF (source, context);
+
+ return new_source;
+}
+
+
+/**
+ * g_main_context_prepare:
+ * @context: a #GMainContext
+ * @priority: location to store priority of highest priority
+ * source already ready.
+ *
+ * Prepares to poll sources within a main loop. The resulting information
+ * for polling is determined by calling g_main_context_query ().
+ *
+ * Return value: %TRUE if some source is ready to be dispatched
+ * prior to polling.
+ **/
+gboolean
+g_main_context_prepare (GMainContext *context,
+ gint *priority)
+{
+ gint n_ready = 0;
+ gint current_priority = G_MAXINT;
+ GSource *source;
+
+ if (context == NULL)
+ context = g_main_context_default ();
- hook = g_hook_first_valid (&source_list, TRUE);
- while (hook)
+ LOCK_CONTEXT (context);
+
+ context->time_is_current = FALSE;
+
+ if (context->in_check_or_prepare)
+ {
+ g_warning ("g_main_context_prepare() called recursively from within a source's check() or "
+ "prepare() member.");
+ return FALSE;
+ }
+
+#ifdef G_THREADS_ENABLED
+ if (context->poll_waiting)
+ {
+ g_warning("g_main_context_prepare(): main loop already active in another thread");
+ UNLOCK_CONTEXT (context);
+ return FALSE;
+ }
+
+ context->poll_waiting = TRUE;
+#endif /* G_THREADS_ENABLED */
+
+#if 0
+ /* If recursing, finish up current dispatch, before starting over */
+ if (context->pending_dispatches)
+ {
+ if (dispatch)
+ g_main_dispatch (context, ¤t_time);
+
+ UNLOCK_CONTEXT (context);
+ return TRUE;
+ }
+#endif
+
+ /* If recursing, clear list of pending dispatches */
+ g_ptr_array_set_size (context->pending_dispatches, 0);
+
+ /* Prepare all sources */
+
+ context->timeout = -1;
+
+ source = next_valid_source (context, NULL);
+ while (source)
{
- GSource *source = (GSource *)hook;
gint source_timeout = -1;
if ((n_ready > 0) && (source->priority > current_priority))
{
- g_hook_unref (&source_list, hook);
+ SOURCE_UNREF (source, context);
break;
}
- if (G_HOOK_IN_CALL (hook) && !(hook->flags & G_SOURCE_CAN_RECURSE))
+ if ((source->flags & G_HOOK_FLAG_IN_CALL) && !(source->flags & G_SOURCE_CAN_RECURSE))
+ goto next;
+
+ if (!(source->flags & G_SOURCE_READY))
{
- hook = g_hook_next_valid (&source_list, hook, TRUE);
- continue;
+ gboolean result;
+ gboolean (*prepare) (GSource *source,
+ gint *timeout);
+
+ prepare = source->source_funcs->prepare;
+ context->in_check_or_prepare++;
+ UNLOCK_CONTEXT (context);
+
+ result = (*prepare) (source, &source_timeout);
+
+ LOCK_CONTEXT (context);
+ context->in_check_or_prepare--;
+
+ if (result)
+ source->flags |= G_SOURCE_READY;
}
- in_check_or_prepare++;
- if (hook->flags & G_SOURCE_READY ||
- ((GSourceFuncs *) hook->func)->prepare (source->source_data,
- ¤t_time,
- &source_timeout))
+ if (source->flags & G_SOURCE_READY)
{
- in_check_or_prepare--;
- if (!dispatch)
- {
- hook->flags |= G_SOURCE_READY;
- g_hook_unref (&source_list, hook);
- G_UNLOCK (main_loop);
-
- return TRUE;
- }
+ n_ready++;
+ current_priority = source->priority;
+ context->timeout = 0;
+ }
+
+ if (source_timeout >= 0)
+ {
+ if (context->timeout < 0)
+ context->timeout = source_timeout;
else
+ context->timeout = MIN (context->timeout, source_timeout);
+ }
+
+ next:
+ source = next_valid_source (context, source);
+ }
+
+ UNLOCK_CONTEXT (context);
+
+ if (priority)
+ *priority = current_priority;
+
+ return (n_ready > 0);
+}
+
+/**
+ * g_main_context_query:
+ * @context: a #GMainContext
+ * @max_priority: maximum priority source to check
+ * @timeout: location to store timeout to be used in polling
+ * @fds: location to store #GPollFD records that need to be polled.
+ * @n_fds: length of @fds.
+ *
+ * Determines information necessary to poll this main loop.
+ *
+ * Return value:
+ **/
+gint
+g_main_context_query (GMainContext *context,
+ gint max_priority,
+ gint *timeout,
+ GPollFD *fds,
+ gint n_fds)
+{
+ gint n_poll;
+ GPollRec *pollrec;
+
+ LOCK_CONTEXT (context);
+
+ pollrec = context->poll_records;
+ n_poll = 0;
+ while (pollrec && max_priority >= pollrec->priority)
+ {
+ if (pollrec->fd->events)
+ {
+ if (n_poll < n_fds)
{
- hook->flags |= G_SOURCE_READY;
- n_ready++;
- current_priority = source->priority;
- timeout = 0;
+ fds[n_poll].fd = pollrec->fd->fd;
+ /* In direct contradiction to the Unix98 spec, IRIX runs into
+ * difficulty if you pass in POLLERR, POLLHUP or POLLNVAL
+ * flags in the events field of the pollfd while it should
+ * just ignoring them. So we mask them out here.
+ */
+ fds[n_poll].events = pollrec->fd->events & ~(G_IO_ERR|G_IO_HUP|G_IO_NVAL);
+ fds[n_poll].revents = 0;
}
+ n_poll++;
}
- else
- in_check_or_prepare--;
- if (source_timeout >= 0)
+ pollrec = pollrec->next;
+ }
+
+#ifdef G_THREADS_ENABLED
+ context->poll_changed = FALSE;
+#endif
+
+ if (timeout)
+ {
+ *timeout = context->timeout;
+ if (timeout != 0)
+ context->time_is_current = FALSE;
+ }
+
+ UNLOCK_CONTEXT (context);
+
+ return n_poll;
+}
+
+/**
+ * g_main_context_check:
+ * @context: a #GMainContext
+ * @max_priority: the maximum numerical priority of sources to check
+ * @fds: array of #GPollFD's that was passed to the last call to
+ * g_main_context_query()
+ * @n_fds: return value of g_main_context_query()
+ *
+ * Pass the results of polling back to the main loop.
+ *
+ * Return value: %TRUE if some sources are ready to be dispatched.
+ **/
+gboolean
+g_main_context_check (GMainContext *context,
+ gint max_priority,
+ GPollFD *fds,
+ gint n_fds)
+{
+ GSource *source;
+ GPollRec *pollrec;
+ gint n_ready = 0;
+ gint i;
+
+ LOCK_CONTEXT (context);
+
+ if (context->in_check_or_prepare)
+ {
+ g_warning ("g_main_context_check() called recursively from within a source's check() or "
+ "prepare() member.");
+ return FALSE;
+ }
+
+#ifdef G_THREADS_ENABLED
+ if (!context->poll_waiting)
+ {
+#ifndef G_OS_WIN32
+ gchar c;
+ read (context->wake_up_pipe[0], &c, 1);
+#endif
+ }
+ else
+ context->poll_waiting = FALSE;
+
+ /* If the set of poll file descriptors changed, bail out
+ * and let the main loop rerun
+ */
+ if (context->poll_changed)
+ return 0;
+#endif /* G_THREADS_ENABLED */
+
+ pollrec = context->poll_records;
+ i = 0;
+ while (i < n_fds)
+ {
+ if (pollrec->fd->events)
{
- if (timeout < 0)
- timeout = source_timeout;
- else
- timeout = MIN (timeout, source_timeout);
+ pollrec->fd->revents = fds[i].revents;
+ i++;
}
+ pollrec = pollrec->next;
+ }
- hook = g_hook_next_valid (&source_list, hook, TRUE);
+ source = next_valid_source (context, NULL);
+ while (source)
+ {
+ if ((n_ready > 0) && (source->priority > max_priority))
+ {
+ SOURCE_UNREF (source, context);
+ break;
+ }
+ if ((source->flags & G_HOOK_FLAG_IN_CALL) && !(source->flags & G_SOURCE_CAN_RECURSE))
+ goto next;
+
+ if (!(source->flags & G_SOURCE_READY))
+ {
+ gboolean result;
+ gboolean (*check) (GSource *source);
+
+ check = source->source_funcs->check;
+
+ context->in_check_or_prepare++;
+ UNLOCK_CONTEXT (context);
+
+ result = (*check) (source);
+
+ LOCK_CONTEXT (context);
+ context->in_check_or_prepare--;
+
+ if (result)
+ source->flags |= G_SOURCE_READY;
+ }
+
+ if (source->flags & G_SOURCE_READY)
+ {
+ source->ref_count++;
+ g_ptr_array_add (context->pending_dispatches, source);
+
+ n_ready++;
+ }
+
+ next:
+ source = next_valid_source (context, source);
}
- /* poll(), if necessary */
+ UNLOCK_CONTEXT (context);
- g_main_poll (timeout, n_ready > 0, current_priority);
+ return n_ready > 0;
+}
- /* Check to see what sources need to be dispatched */
+/**
+ * g_main_context_dispatch:
+ * @context: a #GMainContext
+ *
+ * Dispatch all pending sources()
+ **/
+void
+g_main_context_dispatch (GMainContext *context)
+{
+ LOCK_CONTEXT (context);
- n_ready = 0;
+ if (context->pending_dispatches->len > 0)
+ {
+ g_main_dispatch (context);
+ }
+
+ UNLOCK_CONTEXT (context);
+}
+
+static gboolean
+g_main_context_iterate (GMainContext *context,
+ gboolean block,
+ gboolean dispatch)
+{
+ gint max_priority;
+ gint timeout;
+ gboolean some_ready;
+ gint nfds, new_nfds;
+ GPollFD *fds;
- hook = g_hook_first_valid (&source_list, TRUE);
- while (hook)
+ some_ready = g_main_context_prepare (context, &max_priority);
+
+ do
{
- GSource *source = (GSource *)hook;
+ LOCK_CONTEXT (context);
- if ((n_ready > 0) && (source->priority > current_priority))
+ if (context->cached_poll_array)
{
- g_hook_unref (&source_list, hook);
- break;
+ nfds = context->cached_poll_array_size;
+ fds = context->cached_poll_array;
+ context->cached_poll_array = NULL;
}
- if (G_HOOK_IN_CALL (hook) && !(hook->flags & G_SOURCE_CAN_RECURSE))
+ else
{
- hook = g_hook_next_valid (&source_list, hook, TRUE);
- continue;
+ nfds = context->cached_poll_array_size = context->n_poll_records;
+ fds = g_new (GPollFD, nfds);
}
- in_check_or_prepare++;
- if (hook->flags & G_SOURCE_READY ||
- ((GSourceFuncs *) hook->func)->check (source->source_data,
- ¤t_time))
- {
- in_check_or_prepare--;
- if (dispatch)
- {
- hook->flags &= ~G_SOURCE_READY;
- g_hook_ref (&source_list, hook);
- pending_dispatches = g_slist_prepend (pending_dispatches, source);
- current_priority = source->priority;
- n_ready++;
- }
- else
- {
- g_hook_unref (&source_list, hook);
- G_UNLOCK (main_loop);
-
- return TRUE;
- }
- }
- else
- in_check_or_prepare--;
-
- hook = g_hook_next_valid (&source_list, hook, TRUE);
+ UNLOCK_CONTEXT (context);
+
+ new_nfds = g_main_context_query (context, max_priority,
+ &timeout, fds, nfds);
}
+ while (new_nfds > nfds);
- /* Now invoke the callbacks */
+ if (!block)
+ timeout = 0;
+
+ g_main_context_poll (context, timeout, max_priority,
+ fds, new_nfds);
- if (pending_dispatches)
- {
- pending_dispatches = g_slist_reverse (pending_dispatches);
- g_main_dispatch (¤t_time);
- retval = TRUE;
- }
+ g_main_context_check (context,
+ max_priority,
+ fds, new_nfds);
- G_UNLOCK (main_loop);
+ LOCK_CONTEXT (context);
+
+ g_assert (!context->cached_poll_array);
+
+ context->cached_poll_array = fds;
+ context->cached_poll_array_size = nfds;
+
+ UNLOCK_CONTEXT (context);
+
+ if (dispatch)
+ g_main_context_dispatch (context);
- return retval;
+ return some_ready;
}
-/* See if any events are pending
- */
+/**
+ * g_main_context_pending:
+ * @context: a #GMainContext (if %NULL, the default context will be used)
+ *
+ * Check if any sources have pending events for the given context.
+ *
+ * Return value: %TRUE if events are pending.
+ **/
gboolean
-g_main_pending (void)
+g_main_context_pending (GMainContext *context)
{
- return in_check_or_prepare ? FALSE : g_main_iterate (FALSE, FALSE);
+ if (!context)
+ context = g_main_context_default();
+
+ return g_main_context_iterate (context, FALSE, FALSE);
}
-/* Run a single iteration of the mainloop. If block is FALSE,
- * will never block
- */
+/**
+ * g_main_context_iteration:
+ * @context: a #GMainContext (if %NULL, the default context will be used)
+ * @may_block: whether the call may block.
+ *
+ * Run a single iteration for the given main loop. This involves
+ * checking to see if any event sources are ready to be processed,
+ * then if no events sources are ready and @may_block is %TRUE, waiting
+ * for a source to become ready, then dispatching the highest priority
+ * events sources that are ready. Note that even when @may_block is %TRUE,
+ * it is still possible for g_main_context_iteration() to return
+ * %FALSE, since the the wait may be interrupted for other
+ * reasons than an event source becoming ready.
+ *
+ * Return value: %TRUE if events were dispatched.
+ **/
gboolean
-g_main_iteration (gboolean block)
+g_main_context_iteration (GMainContext *context, gboolean may_block)
{
- if (in_check_or_prepare)
- {
- g_warning ("g_main_iteration(): called recursively from within a source's check() or "
- "prepare() member, iteration not possible");
- return FALSE;
- }
- else
- return g_main_iterate (block, TRUE);
+ if (!context)
+ context = g_main_context_default();
+
+ return g_main_context_iterate (context, may_block, TRUE);
}
-GMainLoop*
-g_main_new (gboolean is_running)
+/**
+ * g_main_loop_new:
+ * @context: a #GMainContext (if %NULL, the default context will be used).
+ * @is_running: set to TRUE to indicate that the loop is running. This
+ * is not very important since calling g_main_run() will set this to
+ * TRUE anyway.
+ *
+ * Create a new #GMainLoop structure
+ *
+ * Return value:
+ **/
+GMainLoop *
+g_main_loop_new (GMainContext *context,
+ gboolean is_running)
{
GMainLoop *loop;
-
+
+ if (!context)
+ context = g_main_context_default();
+
loop = g_new0 (GMainLoop, 1);
+ loop->context = context;
loop->is_running = is_running != FALSE;
+ loop->ref_count = 1;
+
+#ifdef G_THREADS_ENABLED
+ if (g_thread_supported ())
+ loop->mutex = g_mutex_new ();
+ else
+ loop->mutex = NULL;
+ loop->sem_cond = NULL;
+#endif /* G_THREADS_ENABLED */
return loop;
}
-void
-g_main_run (GMainLoop *loop)
+/**
+ * g_main_loop_ref:
+ * @loop: a #GMainLoop
+ *
+ * Increase the reference count on a #GMainLoop object by one.
+ *
+ * Return value: @loop
+ **/
+GMainLoop *
+g_main_loop_ref (GMainLoop *loop)
+{
+ g_return_val_if_fail (loop != NULL, NULL);
+
+ LOCK_LOOP (loop);
+ loop->ref_count++;
+ UNLOCK_LOOP (loop);
+
+ return loop;
+}
+
+static void
+main_loop_destroy (GMainLoop *loop)
+{
+#ifdef G_THREADS_ENABLED
+ g_mutex_free (loop->mutex);
+ if (loop->sem_cond)
+ g_cond_free (loop->sem_cond);
+#endif /* G_THREADS_ENABLED */
+
+ g_free (loop);
+}
+
+/**
+ * g_main_loop_unref:
+ * @loop: a #GMainLoop
+ *
+ * Decreases the reference count on a #GMainLoop object by one. If
+ * the result is zero, free the loop and free all associated memory.
+ **/
+void
+g_main_loop_unref (GMainLoop *loop)
{
g_return_if_fail (loop != NULL);
+ g_return_if_fail (loop->ref_count > 0);
- if (in_check_or_prepare)
+ LOCK_LOOP (loop);
+
+ loop->ref_count--;
+ if (loop->ref_count == 0)
{
- g_warning ("g_main_run(): called recursively from within a source's check() or "
- "prepare() member, iteration not possible");
- return;
+ /* When the ref_count is 0, there can be nobody else using the
+ * loop, so it is safe to unlock before destroying.
+ */
+ UNLOCK_LOOP (loop);
+ main_loop_destroy (loop);
}
-
- loop->is_running = TRUE;
- while (loop->is_running)
- g_main_iterate (TRUE, TRUE);
+ else
+ UNLOCK_LOOP (loop);
}
+/**
+ * g_main_loop_run:
+ * @loop: a #GMainLoop
+ *
+ * Run a main loop until g_main_quit() is called on the loop.
+ * If this is called for the thread of the loop's #GMainContext,
+ * it will process events from the loop, otherwise it will
+ * simply wait.
+ **/
void
-g_main_quit (GMainLoop *loop)
+g_main_loop_run (GMainLoop *loop)
{
g_return_if_fail (loop != NULL);
- loop->is_running = FALSE;
+ /* The assumption here is that a reference is held to the loop
+ * until we recursively iterate
+ */
+#ifdef G_THREADS_ENABLED
+ if (loop->context->thread != g_thread_self ())
+ {
+ LOCK_LOOP (loop);
+
+ loop->ref_count++;
+
+ if (!g_thread_supported ())
+ {
+ g_warning ("g_main_loop_run() was called from second thread but"
+ "g_thread_init() was never called.");
+ }
+ else
+ {
+ if (!loop->sem_cond)
+ loop->sem_cond = g_cond_new ();
+
+ if (!loop->is_running)
+ loop->is_running = TRUE;
+
+ while (loop->is_running)
+ g_cond_wait (loop->sem_cond, loop->mutex);
+ }
+ }
+ else
+#endif /* G_THREADS_ENABLED */
+ {
+ LOCK_CONTEXT (loop->context);
+ if (loop->context->in_check_or_prepare)
+ {
+ g_warning ("g_main_run(): called recursively from within a source's check() or "
+ "prepare() member, iteration not possible.");
+ return;
+ }
+ UNLOCK_CONTEXT (loop->context);
+
+ LOCK_LOOP (loop);
+
+ loop->ref_count++;
+ loop->is_running = TRUE;
+ while (loop->is_running)
+ {
+ UNLOCK_LOOP (loop);
+ g_main_context_iterate (loop->context, TRUE, TRUE);
+ LOCK_LOOP (loop);
+ }
+ }
+
+ /* We inline this here rather than calling g_main_loop_unref() to
+ * avoid an extra unlock/lock.
+ */
+ loop->ref_count--;
+ if (loop->ref_count == 0)
+ {
+ UNLOCK_LOOP (loop);
+ main_loop_destroy (loop);
+ }
+ else
+ UNLOCK_LOOP (loop);
}
+/**
+ * g_main_loop_quit:
+ * @loop: a #GMainLoop
+ *
+ * Stops a #GMainLoop from running. Any calls to g_main_loop_run()
+ * for the loop will return.
+ **/
void
-g_main_destroy (GMainLoop *loop)
+g_main_loop_quit (GMainLoop *loop)
{
g_return_if_fail (loop != NULL);
- g_free (loop);
+ LOCK_LOOP (loop);
+ loop->is_running = FALSE;
+
+#ifdef G_THREADS_ENABLED
+ if (loop->sem_cond)
+ g_cond_broadcast (loop->sem_cond);
+#endif
+
+ UNLOCK_LOOP (loop);
+
+ LOCK_CONTEXT (loop->context);
+
+ g_main_context_wakeup (loop->context);
+ UNLOCK_CONTEXT (loop->context);
}
+/**
+ * g_main_loop_is_running:
+ * @loop: a #GMainLoop.
+ *
+ * Check to see if the main loop is currently being run via g_main_run()
+ *
+ * Return value: %TRUE if the mainloop is currently being run.
+ **/
gboolean
-g_main_is_running (GMainLoop *loop)
+g_main_loop_is_running (GMainLoop *loop)
{
+ gboolean result;
+
g_return_val_if_fail (loop != NULL, FALSE);
- return loop->is_running;
+ LOCK_LOOP (loop);
+ result = loop->is_running;
+ UNLOCK_LOOP (loop);
+
+ return result;
}
-/* HOLDS: main_loop_lock */
+/* HOLDS: context's lock */
static void
-g_main_poll (gint timeout,
- gboolean use_priority,
- gint priority)
+g_main_context_poll (GMainContext *context,
+ gint timeout,
+ gint priority,
+ GPollFD *fds,
+ gint n_fds)
{
- GPollFD *fd_array;
+#ifdef G_MAIN_POLL_DEBUG
+ GTimer *poll_timer;
GPollRec *pollrec;
-
gint i;
- gint npoll;
-#ifdef G_THREADS_ENABLED
-#ifndef NATIVE_WIN32
- if (wake_up_pipe[0] < 0)
- {
- if (pipe (wake_up_pipe) < 0)
- g_error ("Cannot create pipe main loop wake-up: %s\n",
- g_strerror (errno));
-
- wake_up_rec.fd = wake_up_pipe[0];
- wake_up_rec.events = G_IO_IN;
- g_main_add_poll_unlocked (0, &wake_up_rec);
- }
-#else
- if (wake_up_semaphore == NULL)
- {
- if ((wake_up_semaphore = CreateSemaphore (NULL, 0, 100, NULL)) == NULL)
- g_error ("Cannot create wake-up semaphore: %d", GetLastError ());
- wake_up_rec.fd = (gint) wake_up_semaphore;
- wake_up_rec.events = G_IO_IN;
- g_main_add_poll_unlocked (0, &wake_up_rec);
- }
-#endif
-#endif
- fd_array = g_new (GPollFD, n_poll_records);
-
- pollrec = poll_records;
- i = 0;
- while (pollrec && (!use_priority || priority >= pollrec->priority))
- {
- fd_array[i].fd = pollrec->fd->fd;
- fd_array[i].events = pollrec->fd->events;
- fd_array[i].revents = 0;
-
- pollrec = pollrec->next;
- i++;
- }
-#ifdef G_THREADS_ENABLED
- poll_waiting = TRUE;
#endif
- G_UNLOCK (main_loop);
- npoll = i;
- (*poll_func) (fd_array, npoll, timeout);
- G_LOCK (main_loop);
-#ifdef G_THREADS_ENABLED
- if (!poll_waiting)
+ GPollFunc poll_func;
+
+ if (n_fds || timeout != 0)
{
-#ifndef NATIVE_WIN32
- gchar c;
- read (wake_up_pipe[0], &c, 1);
-#endif
- }
- else
- poll_waiting = FALSE;
+#ifdef G_MAIN_POLL_DEBUG
+ g_print ("g_main_poll(%d) timeout: %d\n", n_fds, timeout);
+ poll_timer = g_timer_new ();
#endif
- pollrec = poll_records;
- i = 0;
- while (i < npoll)
- {
- pollrec->fd->revents = fd_array[i].revents;
- pollrec = pollrec->next;
- i++;
- }
+ LOCK_CONTEXT (context);
- g_free (fd_array);
+ poll_func = context->poll_func;
+
+ UNLOCK_CONTEXT (context);
+ if ((*poll_func) (fds, n_fds, timeout) < 0 && errno != EINTR)
+ g_warning ("poll(2) failed due to: %s.",
+ g_strerror (errno));
+
+#ifdef G_MAIN_POLL_DEBUG
+ LOCK_CONTEXT (context);
+
+ g_print ("g_main_poll(%d) timeout: %d - elapsed %12.10f seconds",
+ n_fds,
+ timeout,
+ g_timer_elapsed (poll_timer, NULL));
+ g_timer_destroy (poll_timer);
+ pollrec = context->poll_records;
+ i = 0;
+ while (i < n_fds)
+ {
+ if (pollrec->fd->events)
+ {
+ if (fds[i].revents)
+ {
+ g_print (" [%d:", fds[i].fd);
+ if (fds[i].revents & G_IO_IN)
+ g_print ("i");
+ if (fds[i].revents & G_IO_OUT)
+ g_print ("o");
+ if (fds[i].revents & G_IO_PRI)
+ g_print ("p");
+ if (fds[i].revents & G_IO_ERR)
+ g_print ("e");
+ if (fds[i].revents & G_IO_HUP)
+ g_print ("h");
+ if (fds[i].revents & G_IO_NVAL)
+ g_print ("n");
+ g_print ("]");
+ }
+ i++;
+ }
+ pollrec = pollrec->next;
+ }
+ g_print ("\n");
+
+ UNLOCK_CONTEXT (context);
+#endif
+ } /* if (n_fds || timeout != 0) */
}
-void
-g_main_add_poll (GPollFD *fd,
- gint priority)
+/**
+ * g_main_context_add_poll:
+ * @context: a #GMainContext (or %NULL for the default context)
+ * @fd: a #GPollFD structure holding information about a file
+ * descriptor to watch.
+ * @priority: the priority for this file descriptor which should be
+ * the same as the priority used for g_source_attach() to ensure that the
+ * file descriptor is polled whenever the results may be needed.
+ *
+ * Add a file descriptor to the set of file descriptors polled * for
+ * this context. This will very seldom be used directly. Instead
+ * a typical event source will use g_source_add_poll() instead.
+ **/
+void
+g_main_context_add_poll (GMainContext *context,
+ GPollFD *fd,
+ gint priority)
{
- G_LOCK (main_loop);
- g_main_add_poll_unlocked (priority, fd);
- G_UNLOCK (main_loop);
+ if (!context)
+ context = g_main_context_default ();
+
+ LOCK_CONTEXT (context);
+ g_main_context_add_poll_unlocked (context, priority, fd);
+ UNLOCK_CONTEXT (context);
}
/* HOLDS: main_loop_lock */
static void
-g_main_add_poll_unlocked (gint priority,
- GPollFD *fd)
+g_main_context_add_poll_unlocked (GMainContext *context,
+ gint priority,
+ GPollFD *fd)
{
GPollRec *lastrec, *pollrec, *newrec;
- if (!poll_chunk)
- poll_chunk = g_mem_chunk_create (GPollRec, 32, G_ALLOC_ONLY);
+ if (!context->poll_chunk)
+ context->poll_chunk = g_mem_chunk_create (GPollRec, 32, G_ALLOC_ONLY);
- if (poll_free_list)
+ if (context->poll_free_list)
{
- newrec = poll_free_list;
- poll_free_list = newrec->next;
+ newrec = context->poll_free_list;
+ context->poll_free_list = newrec->next;
}
else
- newrec = g_chunk_new (GPollRec, poll_chunk);
+ newrec = g_chunk_new (GPollRec, context->poll_chunk);
+ /* This file descriptor may be checked before we ever poll */
+ fd->revents = 0;
newrec->fd = fd;
newrec->priority = priority;
lastrec = NULL;
- pollrec = poll_records;
+ pollrec = context->poll_records;
while (pollrec && priority >= pollrec->priority)
{
lastrec = pollrec;
if (lastrec)
lastrec->next = newrec;
else
- poll_records = newrec;
+ context->poll_records = newrec;
newrec->next = pollrec;
- n_poll_records++;
+ context->n_poll_records++;
+ if (context->cached_poll_array &&
+ context->cached_poll_array_size < context->n_poll_records)
+ {
+ g_free (context->cached_poll_array);
+ context->cached_poll_array = NULL;
+ }
+
+#ifdef G_THREADS_ENABLED
+ context->poll_changed = TRUE;
+
+ /* Now wake up the main loop if it is waiting in the poll() */
+ g_main_context_wakeup (context);
+#endif
}
-void
-g_main_remove_poll (GPollFD *fd)
+/**
+ * g_main_context_remove_poll:
+ * @context:a #GMainContext
+ * @fd: a #GPollFD descriptor previously added with g_main_context_add_poll()
+ *
+ * Remove file descriptor from the set of file descriptors to be
+ * polled for a particular context.
+ **/
+void
+g_main_context_remove_poll (GMainContext *context,
+ GPollFD *fd)
{
- GPollRec *pollrec, *lastrec;
+ if (!context)
+ context = g_main_context_default ();
+
+ LOCK_CONTEXT (context);
- G_LOCK (main_loop);
+ g_main_context_remove_poll_unlocked (context, fd);
+ UNLOCK_CONTEXT (context);
+}
+
+static void
+g_main_context_remove_poll_unlocked (GMainContext *context,
+ GPollFD *fd)
+{
+ GPollRec *pollrec, *lastrec;
+
lastrec = NULL;
- pollrec = poll_records;
+ pollrec = context->poll_records;
while (pollrec)
{
if (lastrec != NULL)
lastrec->next = pollrec->next;
else
- poll_records = pollrec->next;
+ context->poll_records = pollrec->next;
+
+#ifdef ENABLE_GC_FRIENDLY
+ pollrec->fd = NULL;
+#endif /* ENABLE_GC_FRIENDLY */
- pollrec->next = poll_free_list;
- poll_free_list = pollrec;
+ pollrec->next = context->poll_free_list;
+ context->poll_free_list = pollrec;
- n_poll_records--;
+ context->n_poll_records--;
break;
}
lastrec = pollrec;
pollrec = pollrec->next;
}
- G_UNLOCK (main_loop);
+#ifdef G_THREADS_ENABLED
+ context->poll_changed = TRUE;
+
+ /* Now wake up the main loop if it is waiting in the poll() */
+ g_main_context_wakeup (context);
+#endif
}
-void
-g_main_set_poll_func (GPollFunc func)
+/**
+ * g_source_get_current_time:
+ * @source: a #GSource
+ * @timeval: #GTimeVal structure in which to store current time.
+ *
+ * Gets the "current time" to be used when checking
+ * this source. The advantage of calling this function over
+ * calling g_get_current_time() directly is that when
+ * checking multiple sources, GLib can cache a single value
+ * instead of having to repeatedly get the system time.
+ **/
+void
+g_source_get_current_time (GSource *source,
+ GTimeVal *timeval)
+{
+ GMainContext *context;
+
+ g_return_if_fail (source->context != NULL);
+
+ context = source->context;
+
+ LOCK_CONTEXT (context);
+
+ if (!context->time_is_current)
+ {
+ g_get_current_time (&context->current_time);
+ context->time_is_current = TRUE;
+ }
+
+ *timeval = context->current_time;
+
+ UNLOCK_CONTEXT (context);
+}
+
+/**
+ * g_main_context_set_poll_func:
+ * @context: a #GMainContext
+ * @func: the function to call to poll all file descriptors
+ *
+ * Sets the function to use to handle polling of file descriptors. It
+ * will be used instead of the poll() system call (or GLib's
+ * replacement function, which is used where poll() isn't available).
+ *
+ * This function could possibly be used to integrate the GLib event
+ * loop with an external event loop.
+ **/
+void
+g_main_context_set_poll_func (GMainContext *context,
+ GPollFunc func)
{
+ if (!context)
+ context = g_main_context_default ();
+
+ LOCK_CONTEXT (context);
+
if (func)
- poll_func = func;
+ context->poll_func = func;
else
+ {
#ifdef HAVE_POLL
- poll_func = (GPollFunc) poll;
+ context->poll_func = (GPollFunc) poll;
+#else
+ context->poll_func = (GPollFunc) g_poll;
+#endif
+ }
+
+ UNLOCK_CONTEXT (context);
+}
+
+/**
+ * g_main_context_get_poll_func:
+ * @context: a #GMainContext
+ *
+ * Gets the poll function set by g_main_context_set_poll_func()
+ *
+ * Return value: the poll function
+ **/
+GPollFunc
+g_main_context_get_poll_func (GMainContext *context)
+{
+ GPollFunc result;
+
+ if (!context)
+ context = g_main_context_default ();
+
+ LOCK_CONTEXT (context);
+ result = context->poll_func;
+ UNLOCK_CONTEXT (context);
+
+ return result;
+}
+
+/* HOLDS: context's lock */
+/* Wake the main loop up from a poll() */
+static void
+g_main_context_wakeup (GMainContext *context)
+{
+#ifdef G_THREADS_ENABLED
+ if (g_thread_supported() && context->poll_waiting)
+ {
+ context->poll_waiting = FALSE;
+#ifndef G_OS_WIN32
+ write (context->wake_up_pipe[1], "A", 1);
#else
- poll_func = (GPollFunc) g_poll;
+ ReleaseSemaphore (context->wake_up_semaphore, 1, NULL);
+#endif
+ }
#endif
}
/* Timeouts */
-static gboolean
-g_timeout_prepare (gpointer source_data,
- GTimeVal *current_time,
- gint *timeout)
+static void
+g_timeout_set_expiration (GTimeoutSource *timeout_source,
+ GTimeVal *current_time)
{
- glong msec;
- GTimeoutData *data = source_data;
+ guint seconds = timeout_source->interval / 1000;
+ guint msecs = timeout_source->interval - seconds * 1000;
+
+ timeout_source->expiration.tv_sec = current_time->tv_sec + seconds;
+ timeout_source->expiration.tv_usec = current_time->tv_usec + msecs * 1000;
+ if (timeout_source->expiration.tv_usec >= 1000000)
+ {
+ timeout_source->expiration.tv_usec -= 1000000;
+ timeout_source->expiration.tv_sec++;
+ }
+}
- msec = (data->expiration.tv_sec - current_time->tv_sec) * 1000 +
- (data->expiration.tv_usec - current_time->tv_usec) / 1000;
+static gboolean
+g_timeout_prepare (GSource *source,
+ gint *timeout)
+{
+ glong msec;
+ GTimeVal current_time;
+
+ GTimeoutSource *timeout_source = (GTimeoutSource *)source;
- *timeout = (msec <= 0) ? 0 : msec;
+ g_source_get_current_time (source, ¤t_time);
+
+ msec = ((timeout_source->expiration.tv_sec - current_time.tv_sec) * 1000 +
+ (timeout_source->expiration.tv_usec - current_time.tv_usec) / 1000);
- return (msec <= 0);
+ if (msec < 0)
+ msec = 0;
+ else if (msec > timeout_source->interval)
+ {
+ /* The system time has been set backwards, so we
+ * reset the expiration time to now + timeout_source->interval;
+ * this at least avoids hanging for long periods of time.
+ */
+ g_timeout_set_expiration (timeout_source, ¤t_time);
+ msec = timeout_source->interval;
+ }
+
+ *timeout = msec;
+
+ return msec == 0;
}
static gboolean
-g_timeout_check (gpointer source_data,
- GTimeVal *current_time)
+g_timeout_check (GSource *source)
{
- GTimeoutData *data = source_data;
+ GTimeVal current_time;
+ GTimeoutSource *timeout_source = (GTimeoutSource *)source;
- return (data->expiration.tv_sec < current_time->tv_sec) ||
- ((data->expiration.tv_sec == current_time->tv_sec) &&
- (data->expiration.tv_usec <= current_time->tv_usec));
+ g_source_get_current_time (source, ¤t_time);
+
+ return ((timeout_source->expiration.tv_sec < current_time.tv_sec) ||
+ ((timeout_source->expiration.tv_sec == current_time.tv_sec) &&
+ (timeout_source->expiration.tv_usec <= current_time.tv_usec)));
}
static gboolean
-g_timeout_dispatch (gpointer source_data,
- GTimeVal *current_time,
- gpointer user_data)
+g_timeout_dispatch (GSource *source,
+ GSourceFunc callback,
+ gpointer user_data)
{
- GTimeoutData *data = source_data;
+ GTimeoutSource *timeout_source = (GTimeoutSource *)source;
- if (data->callback (user_data))
+ if (!callback)
+ {
+ g_warning ("Timeout source dispatched without callback\n"
+ "You must call g_source_set_callback().");
+ return FALSE;
+ }
+
+ if (callback (user_data))
{
- guint seconds = data->interval / 1000;
- guint msecs = data->interval - seconds * 1000;
+ GTimeVal current_time;
+
+ g_source_get_current_time (source, ¤t_time);
+ g_timeout_set_expiration (timeout_source, ¤t_time);
- data->expiration.tv_sec = current_time->tv_sec + seconds;
- data->expiration.tv_usec = current_time->tv_usec + msecs * 1000;
- if (data->expiration.tv_usec >= 1000000)
- {
- data->expiration.tv_usec -= 1000000;
- data->expiration.tv_sec++;
- }
return TRUE;
}
else
return FALSE;
}
-guint
+/**
+ * g_timeout_source_new:
+ * @interval: the timeout interval in milliseconds.
+ *
+ * Create a new timeout source.
+ *
+ * The source will not initially be associated with any #GMainContext
+ * and must be added to one with g_source_attach() before it will be
+ * executed.
+ *
+ * Return value: the newly create timeout source
+ **/
+GSource *
+g_timeout_source_new (guint interval)
+{
+ GSource *source = g_source_new (&timeout_funcs, sizeof (GTimeoutSource));
+ GTimeoutSource *timeout_source = (GTimeoutSource *)source;
+ GTimeVal current_time;
+
+ timeout_source->interval = interval;
+
+ g_get_current_time (¤t_time);
+ g_timeout_set_expiration (timeout_source, ¤t_time);
+
+ return source;
+}
+
+/**
+ * g_timeout_add_full:
+ * @priority: the priority of the idle source. Typically this will be in the
+ * range btweeen #G_PRIORITY_DEFAULT_IDLE and #G_PRIORITY_HIGH_IDLE.
+ * @interval: the time between calls to the function, in milliseconds
+ * (1/1000ths of a second.)
+ * @function: function to call
+ * @data: data to pass to @function
+ * @notify: function to call when the idle is removed, or %NULL
+ *
+ * Sets a function to be called at regular intervals, with the given
+ * priority. The function is called repeatedly until it returns
+ * FALSE, at which point the timeout is automatically destroyed and
+ * the function will not be called again. The @notify function is
+ * called when the timeout is destroyed. The first call to the
+ * function will be at the end of the first @interval.
+ *
+ * Note that timeout functions may be delayed, due to the processing of other
+ * event sources. Thus they should not be relied on for precise timing.
+ * After each call to the timeout function, the time of the next
+ * timeout is recalculated based on the current time and the given interval
+ * (it does not try to 'catch up' time lost in delays).
+ *
+ * Return value: the id of event source.
+ **/
+guint
g_timeout_add_full (gint priority,
- guint interval,
+ guint interval,
GSourceFunc function,
gpointer data,
GDestroyNotify notify)
{
- guint seconds;
- guint msecs;
- GTimeoutData *timeout_data = g_new (GTimeoutData, 1);
+ GSource *source;
+ guint id;
+
+ g_return_val_if_fail (function != NULL, 0);
- timeout_data->interval = interval;
- timeout_data->callback = function;
- g_get_current_time (&timeout_data->expiration);
+ source = g_timeout_source_new (interval);
- seconds = timeout_data->interval / 1000;
- msecs = timeout_data->interval - seconds * 1000;
+ if (priority != G_PRIORITY_DEFAULT)
+ g_source_set_priority (source, priority);
- timeout_data->expiration.tv_sec += seconds;
- timeout_data->expiration.tv_usec += msecs * 1000;
- if (timeout_data->expiration.tv_usec >= 1000000)
- {
- timeout_data->expiration.tv_usec -= 1000000;
- timeout_data->expiration.tv_sec++;
- }
+ g_source_set_callback (source, function, data, notify);
+ id = g_source_attach (source, NULL);
+ g_source_unref (source);
- return g_source_add (priority, FALSE, &timeout_funcs, timeout_data, data, notify);
+ return id;
}
+/**
+ * g_timeout_add:
+ * @interval: the time between calls to the function, in milliseconds
+ * (1/1000ths of a second.)
+ * @function: function to call
+ * @data: data to pass to @function
+ *
+ * Sets a function to be called at regular intervals, with the default
+ * priority, #G_PRIORITY_DEFAULT. The function is called repeatedly
+ * until it returns FALSE, at which point the timeout is automatically
+ * destroyed and the function will not be called again. The @notify
+ * function is called when the timeout is destroyed. The first call
+ * to the function will be at the end of the first @interval.
+ *
+ * Note that timeout functions may be delayed, due to the processing of other
+ * event sources. Thus they should not be relied on for precise timing.
+ * After each call to the timeout function, the time of the next
+ * timeout is recalculated based on the current time and the given interval
+ * (it does not try to 'catch up' time lost in delays).
+ *
+ * Return value: the id of event source.
+ **/
guint
g_timeout_add (guint32 interval,
GSourceFunc function,
/* Idle functions */
static gboolean
-g_idle_prepare (gpointer source_data,
- GTimeVal *current_time,
+g_idle_prepare (GSource *source,
gint *timeout)
{
- timeout = 0;
+ *timeout = 0;
+
return TRUE;
}
static gboolean
-g_idle_check (gpointer source_data,
- GTimeVal *current_time)
+g_idle_check (GSource *source)
{
return TRUE;
}
static gboolean
-g_idle_dispatch (gpointer source_data,
- GTimeVal *current_time,
- gpointer user_data)
+g_idle_dispatch (GSource *source,
+ GSourceFunc callback,
+ gpointer user_data)
{
- GSourceFunc func = source_data;
+ if (!callback)
+ {
+ g_warning ("Idle source dispatched without callback\n"
+ "You must call g_source_set_callback().");
+ return FALSE;
+ }
+
+ return callback (user_data);
+}
- return func (user_data);
+/**
+ * g_idle_source_new:
+ *
+ * Create a new idle source.
+ *
+ * The source will not initially be associated with any #GMainContext
+ * and must be added to one with g_source_attach() before it will be
+ * executed.
+ *
+ * Return value: the newly created idle source
+ **/
+GSource *
+g_idle_source_new (void)
+{
+ return g_source_new (&idle_funcs, sizeof (GSource));
}
+/**
+ * g_idle_add_full:
+ * @priority: the priority of the idle source. Typically this will be in the
+ * range btweeen #G_PRIORITY_DEFAULT_IDLE and #G_PRIORITY_HIGH_IDLE.
+ * @function: function to call
+ * @data: data to pass to @function
+ * @notify: function to call when the idle is removed, or %NULL
+ *
+ * Adds a function to be called whenever there are no higher priority
+ * events pending. If the function returns FALSE it is automatically
+ * removed from the list of event sources and will not be called again.
+ *
+ * Return value: the id of the event source.
+ **/
guint
g_idle_add_full (gint priority,
GSourceFunc function,
gpointer data,
GDestroyNotify notify)
{
+ GSource *source;
+ guint id;
+
g_return_val_if_fail (function != NULL, 0);
- return g_source_add (priority, FALSE, &idle_funcs, function, data, notify);
+ source = g_idle_source_new ();
+
+ if (priority != G_PRIORITY_DEFAULT)
+ g_source_set_priority (source, priority);
+
+ g_source_set_callback (source, function, data, notify);
+ id = g_source_attach (source, NULL);
+ g_source_unref (source);
+
+ return id;
}
+/**
+ * g_idle_add:
+ * @function: function to call
+ * @data: data to pass to @function.
+ *
+ * Adds a function to be called whenever there are no higher priority
+ * events pending to the default main loop. The function is given the
+ * default idle priority, #G_PRIORITY_DEFAULT_IDLE. If the function
+ * returns FALSE it is automatically removed from the list of event
+ * sources and will not be called again.
+ *
+ * Return value: the id of the event source.
+ **/
guint
g_idle_add (GSourceFunc function,
gpointer data)
return g_idle_add_full (G_PRIORITY_DEFAULT_IDLE, function, data, NULL);
}
+/**
+ * g_idle_remove_by_data:
+ * @data: the data for the idle source's callback.
+ *
+ * Removes the idle function with the given data.
+ *
+ * Return value: %TRUE if an idle source was found and removed.
+ **/
gboolean
g_idle_remove_by_data (gpointer data)
{
return g_source_remove_by_funcs_user_data (&idle_funcs, data);
}
+
projects / platform / upstream / glib.git / blobdiff