* Copyright 1998 Sebastian Wilhelmi; University of Karlsruhe
*
* 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 1997-1999. See the AUTHORS
+ * 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/.
+ * GLib at ftp://ftp.gtk.org/pub/gtk/.
*/
-/*
+/*
* MT safe
*/
+#include "config.h"
+
#include <pthread.h>
#include <errno.h>
#include <stdlib.h>
#ifdef HAVE_SYS_TIME_H
-#include <sys/time.h>
+# include <sys/time.h>
+#endif
+#ifdef HAVE_UNISTD_H
+# include <unistd.h>
+#endif
+
+#ifdef HAVE_SCHED_H
+#include <sched.h>
#endif
-#define posix_print_error( name, num ) \
- g_error( "file %s: line %d (%s): error %s during %s", \
- __FILE__, __LINE__, G_GNUC_PRETTY_FUNCTION, \
- g_strerror((num)), #name )
+#define posix_check_err(err, name) G_STMT_START{ \
+ int error = (err); \
+ if (error) \
+ g_error ("file %s: line %d (%s): error '%s' during '%s'", \
+ __FILE__, __LINE__, G_GNUC_PRETTY_FUNCTION, \
+ g_strerror (error), name); \
+ }G_STMT_END
+
+#define posix_check_cmd(cmd) posix_check_err (posix_error (cmd), #cmd)
+
+#ifdef G_ENABLE_DEBUG
+static gboolean posix_check_cmd_prio_warned = FALSE;
+# define posix_check_cmd_prio(cmd) G_STMT_START{ \
+ int err = posix_error (cmd); \
+ if (err == EPERM) \
+ { \
+ if (!posix_check_cmd_prio_warned) \
+ { \
+ posix_check_cmd_prio_warned = TRUE; \
+ g_warning ("Priorities can only be changed " \
+ "(resp. increased) by root."); \
+ } \
+ } \
+ else \
+ posix_check_err (err, #cmd); \
+ }G_STMT_END
+#else /* G_ENABLE_DEBUG */
+# define posix_check_cmd_prio(cmd) G_STMT_START{ \
+ int err = posix_error (cmd); \
+ if (err != EPERM) \
+ posix_check_err (err, #cmd); \
+ }G_STMT_END
+#endif /* G_ENABLE_DEBUG */
#if defined(G_THREADS_IMPL_POSIX)
-# define posix_check_for_error( what ) G_STMT_START{ \
- int error = (what); \
- if( error ) { posix_print_error( what, error ); } \
- }G_STMT_END
+# define posix_error(what) (what)
# define mutexattr_default NULL
# define condattr_default NULL
#elif defined(G_THREADS_IMPL_DCE)
-# define posix_check_for_error( what ) G_STMT_START{ \
- if( (what) == -1 ) { posix_print_error( what, errno ); } \
- }G_STMT_END
+# define posix_error(what) ((what) == -1 ? errno : 0)
# define pthread_key_create(a, b) pthread_keycreate (a, b)
# define pthread_attr_init(a) pthread_attr_create (a)
# define pthread_attr_destroy(a) pthread_attr_delete (a)
-# define pthread_create(a, b, c, d) pthread_create(a, *b, c, d)
+# define pthread_create(a, b, c, d) pthread_create (a, *b, c, d)
# define mutexattr_default (pthread_mutexattr_default)
# define condattr_default (pthread_condattr_default)
#else /* neither G_THREADS_IMPL_POSIX nor G_THREADS_IMPL_DCE are defined */
# error This should not happen. Contact the GLib team.
#endif
+#if defined (POSIX_MIN_PRIORITY) && defined (POSIX_MAX_PRIORITY)
+# define HAVE_PRIORITIES 1
+static gint priority_normal_value;
+# ifdef __FreeBSD__
+ /* FreeBSD threads use different priority values from the POSIX_
+ * defines so we just set them here. The corresponding macros
+ * PTHREAD_MIN_PRIORITY and PTHREAD_MAX_PRIORITY are implied to be
+ * exported by the docs, but they aren't.
+ */
+# define PRIORITY_LOW_VALUE 0
+# define PRIORITY_URGENT_VALUE 31
+# else /* !__FreeBSD__ */
+# define PRIORITY_LOW_VALUE POSIX_MIN_PRIORITY
+# define PRIORITY_URGENT_VALUE POSIX_MAX_PRIORITY
+# endif /* !__FreeBSD__ */
+# define PRIORITY_NORMAL_VALUE priority_normal_value
+#endif /* POSIX_MIN_PRIORITY && POSIX_MAX_PRIORITY */
+
+static gulong g_thread_min_stack_size = 0;
+
+#define G_MUTEX_SIZE (sizeof (pthread_mutex_t))
+
+#if defined(_SC_THREAD_STACK_MIN) || defined (HAVE_PRIORITIES)
#define HAVE_G_THREAD_IMPL_INIT
-static void
-g_thread_impl_init()
+static void
+g_thread_impl_init(void)
{
- g_thread_min_priority = POSIX_MIN_PRIORITY;
- g_thread_max_priority = POSIX_MAX_PRIORITY;
+#ifdef _SC_THREAD_STACK_MIN
+ g_thread_min_stack_size = MAX (sysconf (_SC_THREAD_STACK_MIN), 0);
+#endif /* _SC_THREAD_STACK_MIN */
+#ifdef HAVE_PRIORITIES
+# ifdef G_THREADS_IMPL_POSIX
+ {
+ struct sched_param sched;
+ int policy;
+ posix_check_cmd (pthread_getschedparam (pthread_self(), &policy, &sched));
+ priority_normal_value = sched.sched_priority;
+ }
+# else /* G_THREADS_IMPL_DCE */
+ posix_check_cmd (priority_normal_value =
+ pthread_getprio (*(pthread_t*)thread,
+ g_thread_priority_map [priority]));
+# endif
+#endif /* HAVE_PRIORITIES */
+
}
+#endif /* _SC_THREAD_STACK_MIN || HAVE_PRIORITIES */
static GMutex *
g_mutex_new_posix_impl (void)
{
GMutex *result = (GMutex *) g_new (pthread_mutex_t, 1);
- posix_check_for_error (pthread_mutex_init ((pthread_mutex_t *) result,
- mutexattr_default));
+ posix_check_cmd (pthread_mutex_init ((pthread_mutex_t *) result,
+ mutexattr_default));
return result;
}
static void
g_mutex_free_posix_impl (GMutex * mutex)
{
- posix_check_for_error (pthread_mutex_destroy ((pthread_mutex_t *) mutex));
+ posix_check_cmd (pthread_mutex_destroy ((pthread_mutex_t *) mutex));
g_free (mutex);
}
return FALSE;
#endif
- posix_check_for_error (result);
+ posix_check_err (posix_error (result), "pthread_mutex_trylock");
return TRUE;
}
g_cond_new_posix_impl (void)
{
GCond *result = (GCond *) g_new (pthread_cond_t, 1);
- posix_check_for_error (pthread_cond_init ((pthread_cond_t *) result,
- condattr_default));
+ posix_check_cmd (pthread_cond_init ((pthread_cond_t *) result,
+ condattr_default));
return result;
}
/* pthread_cond_signal, pthread_cond_broadcast and pthread_cond_wait
can be taken directly, as signature and semantic are right, but
without error check then!!!!, we might want to change this
- therfore. */
+ therefore. */
-#define G_MICROSEC 1000000
-#define G_NANOSEC 1000000000
+#define G_NSEC_PER_SEC 1000000000
static gboolean
g_cond_timed_wait_posix_impl (GCond * cond,
if (!abs_time)
{
- g_cond_wait (cond, entered_mutex);
- return TRUE;
+ result = pthread_cond_wait ((pthread_cond_t *)cond,
+ (pthread_mutex_t *) entered_mutex);
+ timed_out = FALSE;
}
+ else
+ {
+ end_time.tv_sec = abs_time->tv_sec;
+ end_time.tv_nsec = abs_time->tv_usec * (G_NSEC_PER_SEC / G_USEC_PER_SEC);
- end_time.tv_sec = abs_time->tv_sec;
- end_time.tv_nsec = abs_time->tv_usec * (G_NANOSEC / G_MICROSEC);
- g_assert (end_time.tv_nsec < G_NANOSEC);
- result = pthread_cond_timedwait ((pthread_cond_t *) cond,
- (pthread_mutex_t *) entered_mutex,
- &end_time);
+ g_return_val_if_fail (end_time.tv_nsec < G_NSEC_PER_SEC, TRUE);
+ result = pthread_cond_timedwait ((pthread_cond_t *) cond,
+ (pthread_mutex_t *) entered_mutex,
+ &end_time);
#ifdef G_THREADS_IMPL_POSIX
- timed_out = (result == ETIMEDOUT);
+ timed_out = (result == ETIMEDOUT);
#else /* G_THREADS_IMPL_DCE */
- timed_out = (result == -1) && (errno = EAGAIN);
+ timed_out = (result == -1) && (errno == EAGAIN);
#endif
+ }
if (!timed_out)
- posix_check_for_error (result);
+ posix_check_err (posix_error (result), "pthread_cond_timedwait");
+
return !timed_out;
}
static void
g_cond_free_posix_impl (GCond * cond)
{
- posix_check_for_error (pthread_cond_destroy ((pthread_cond_t *) cond));
+ posix_check_cmd (pthread_cond_destroy ((pthread_cond_t *) cond));
g_free (cond);
}
g_private_new_posix_impl (GDestroyNotify destructor)
{
GPrivate *result = (GPrivate *) g_new (pthread_key_t, 1);
- posix_check_for_error (pthread_key_create ((pthread_key_t *) result,
- destructor));
+ posix_check_cmd (pthread_key_create ((pthread_key_t *) result, destructor));
return result;
}
#else /* G_THREADS_IMPL_DCE */
{
void* data;
- posix_check_for_error (pthread_getspecific (*(pthread_key_t *)
- private_key, &data));
+ posix_check_cmd (pthread_getspecific (*(pthread_key_t *) private_key,
+ &data));
return data;
}
#endif
}
static void
-g_thread_create_posix_impl (GThreadFunc thread_func,
- gpointer arg,
+g_thread_create_posix_impl (GThreadFunc thread_func,
+ gpointer arg,
gulong stack_size,
gboolean joinable,
gboolean bound,
GThreadPriority priority,
- gpointer thread)
+ gpointer thread,
+ GError **error)
{
pthread_attr_t attr;
+ gint ret;
g_return_if_fail (thread_func);
+ g_return_if_fail (priority >= G_THREAD_PRIORITY_LOW);
+ g_return_if_fail (priority <= G_THREAD_PRIORITY_URGENT);
+
+ posix_check_cmd (pthread_attr_init (&attr));
- posix_check_for_error (pthread_attr_init (&attr));
-
#ifdef HAVE_PTHREAD_ATTR_SETSTACKSIZE
if (stack_size)
- posix_check_for_error (pthread_attr_setstacksize (&attr, stack_size));
+ {
+ stack_size = MAX (g_thread_min_stack_size, stack_size);
+ /* No error check here, because some systems can't do it and
+ * we simply don't want threads to fail because of that. */
+ pthread_attr_setstacksize (&attr, stack_size);
+ }
#endif /* HAVE_PTHREAD_ATTR_SETSTACKSIZE */
#ifdef PTHREAD_SCOPE_SYSTEM
if (bound)
- posix_check_for_error (pthread_attr_setscope (&attr,
- PTHREAD_SCOPE_SYSTEM));
+ /* No error check here, because some systems can't do it and we
+ * simply don't want threads to fail because of that. */
+ pthread_attr_setscope (&attr, PTHREAD_SCOPE_SYSTEM);
#endif /* PTHREAD_SCOPE_SYSTEM */
#ifdef G_THREADS_IMPL_POSIX
- posix_check_for_error (pthread_attr_setdetachstate (&attr,
+ posix_check_cmd (pthread_attr_setdetachstate (&attr,
joinable ? PTHREAD_CREATE_JOINABLE : PTHREAD_CREATE_DETACHED));
#endif /* G_THREADS_IMPL_POSIX */
-
-#ifdef G_THREADS_IMPL_POSIX
+
+#ifdef HAVE_PRIORITIES
+# ifdef G_THREADS_IMPL_POSIX
{
struct sched_param sched;
- posix_check_for_error (pthread_attr_getschedparam (&attr, &sched));
- sched.sched_priority = g_thread_map_priority (priority);
- posix_check_for_error (pthread_attr_setschedparam (&attr, &sched));
+ posix_check_cmd (pthread_attr_getschedparam (&attr, &sched));
+ sched.sched_priority = g_thread_priority_map [priority];
+ posix_check_cmd_prio (pthread_attr_setschedparam (&attr, &sched));
}
-#else /* G_THREADS_IMPL_DCE */
- posix_check_for_error
- (pthread_attr_setprio (&attr, g_thread_map_priority (priority)));
-#endif /* G_THREADS_IMPL_DCE */
+# else /* G_THREADS_IMPL_DCE */
+ posix_check_cmd_prio
+ (pthread_attr_setprio (&attr, g_thread_priority_map [priority]));
+# endif /* G_THREADS_IMPL_DCE */
+#endif /* HAVE_PRIORITIES */
+ ret = posix_error (pthread_create (thread, &attr,
+ (void* (*)(void*))thread_func, arg));
+
+ posix_check_cmd (pthread_attr_destroy (&attr));
+
+ if (ret == EAGAIN)
+ {
+ g_set_error (error, G_THREAD_ERROR, G_THREAD_ERROR_AGAIN,
+ "Error creating thread: %s", g_strerror (ret));
+ return;
+ }
- posix_check_for_error (pthread_create (thread, &attr,
- (void* (*)(void*))thread_func,
- arg));
-
- posix_check_for_error (pthread_attr_destroy (&attr));
+ posix_check_err (ret, "pthread_create");
#ifdef G_THREADS_IMPL_DCE
if (!joinable)
- posix_check_for_error (pthread_detach (thread));
+ posix_check_cmd (pthread_detach (thread));
#endif /* G_THREADS_IMPL_DCE */
}
-static void
+static void
g_thread_yield_posix_impl (void)
{
POSIX_YIELD_FUNC;
static void
g_thread_join_posix_impl (gpointer thread)
-{
+{
gpointer ignore;
- posix_check_for_error (pthread_join (*(pthread_t*)thread,
- &ignore));
+ posix_check_cmd (pthread_join (*(pthread_t*)thread, &ignore));
}
-static void
-g_thread_exit_posix_impl (void)
+static void
+g_thread_exit_posix_impl (void)
{
pthread_exit (NULL);
}
static void
g_thread_set_priority_posix_impl (gpointer thread, GThreadPriority priority)
{
-#ifdef G_THREADS_IMPL_POSIX
- struct sched_param sched;
- int policy;
- posix_check_for_error (pthread_getschedparam (*(pthread_t*)thread,
- &policy, &sched));
- sched.sched_priority = g_thread_map_priority (priority);
- posix_check_for_error (pthread_setschedparam (*(pthread_t*)thread,
- policy, &sched));
-#else /* G_THREADS_IMPL_DCE */
- posix_check_for_error (pthread_setprio (*(pthread_t*)thread,
- g_thread_map_priority (priority)));
-#endif
+ g_return_if_fail (priority >= G_THREAD_PRIORITY_LOW);
+ g_return_if_fail (priority <= G_THREAD_PRIORITY_URGENT);
+#ifdef HAVE_PRIORITIES
+# ifdef G_THREADS_IMPL_POSIX
+ {
+ struct sched_param sched;
+ int policy;
+ posix_check_cmd (pthread_getschedparam (*(pthread_t*)thread, &policy,
+ &sched));
+ sched.sched_priority = g_thread_priority_map [priority];
+ posix_check_cmd_prio (pthread_setschedparam (*(pthread_t*)thread, policy,
+ &sched));
+ }
+# else /* G_THREADS_IMPL_DCE */
+ posix_check_cmd_prio (pthread_setprio (*(pthread_t*)thread,
+ g_thread_priority_map [priority]));
+# endif
+#endif /* HAVE_PRIORITIES */
}
static void
*(pthread_t*)thread = pthread_self();
}
+static gboolean
+g_thread_equal_posix_impl (gpointer thread1, gpointer thread2)
+{
+ return (pthread_equal (*(pthread_t*)thread1, *(pthread_t*)thread2) != 0);
+}
+
static GThreadFunctions g_thread_functions_for_glib_use_default =
{
g_mutex_new_posix_impl,
g_thread_join_posix_impl,
g_thread_exit_posix_impl,
g_thread_set_priority_posix_impl,
- g_thread_self_posix_impl
+ g_thread_self_posix_impl,
+ g_thread_equal_posix_impl
};
projects / platform / upstream / glib.git / blobdiff