* MT safe
*/
-#include "gsignal.h"
-#include "gbsearcharray.h"
-#include "gvaluecollector.h"
-#include "gvaluetypes.h"
-#include "gboxed.h"
-#include <string.h>
+#include "config.h"
+
+#include <string.h>
+#include <signal.h>
+
+#include "gsignal.h"
+#include "gbsearcharray.h"
+#include "gvaluecollector.h"
+#include "gvaluetypes.h"
+#include "gboxed.h"
+#include "gobject.h"
+#include "genums.h"
+#include "gobjectalias.h"
+
+
+/**
+ * SECTION:signals
+ *
+ * @Short_description: A means for customization of object behaviour
+ * and a general purpose notification mechanism
+ *
+ * @Title: Signals
+ *
+ * The basic concept of the signal system is that of the
+ * <emphasis>emission</emphasis> of a signal. Signals are introduced
+ * per-type and are identified through strings. Signals introduced
+ * for a parent type are available in derived types as well, so
+ * basically they are a per-type facility that is inherited. A signal
+ * emission mainly involves invocation of a certain set of callbacks
+ * in precisely defined manner. There are two main categories of such
+ * callbacks, per-object i'm referring to those types as "object
+ * types" in the following, simply because that is the context most
+ * users will encounter signals in.
+ *
+ * ones and user provided ones.
+ * The per-object callbacks are most often referred to as "object method
+ * handler" or "default (signal) handler", while user provided callbacks are
+ * usually just called "signal handler".
+ * The object method handler is provided at signal creation time (this most
+ * frequently happens at the end of an object class' creation), while user
+ * provided handlers are frequently connected and disconnected to/from a certain
+ * signal on certain object instances.
+ *
+ * A signal emission consists of five stages, unless prematurely stopped:
+ * <variablelist>
+ * <varlistentry><term></term><listitem><para>
+ * 1 - Invocation of the object method handler for %G_SIGNAL_RUN_FIRST signals
+ * </para></listitem></varlistentry>
+ * <varlistentry><term></term><listitem><para>
+ * 2 - Invocation of normal user-provided signal handlers (<emphasis>after</emphasis> flag %FALSE)
+ * </para></listitem></varlistentry>
+ * <varlistentry><term></term><listitem><para>
+ * 3 - Invocation of the object method handler for %G_SIGNAL_RUN_LAST signals
+ * </para></listitem></varlistentry>
+ * <varlistentry><term></term><listitem><para>
+ * 4 - Invocation of user provided signal handlers, connected with an <emphasis>after</emphasis> flag of %TRUE
+ * </para></listitem></varlistentry>
+ * <varlistentry><term></term><listitem><para>
+ * 5 - Invocation of the object method handler for %G_SIGNAL_RUN_CLEANUP signals
+ * </para></listitem></varlistentry>
+ * </variablelist>
+ * The user-provided signal handlers are called in the order they were
+ * connected in.
+ * All handlers may prematurely stop a signal emission, and any number of
+ * handlers may be connected, disconnected, blocked or unblocked during
+ * a signal emission.
+ * There are certain criteria for skipping user handlers in stages 2 and 4
+ * of a signal emission.
+ * First, user handlers may be <emphasis>blocked</emphasis>, blocked handlers are omitted
+ * during callback invocation, to return from the "blocked" state, a
+ * handler has to get unblocked exactly the same amount of times
+ * it has been blocked before.
+ * Second, upon emission of a %G_SIGNAL_DETAILED signal, an additional
+ * "detail" argument passed in to g_signal_emit() has to match the detail
+ * argument of the signal handler currently subject to invocation.
+ * Specification of no detail argument for signal handlers (omission of the
+ * detail part of the signal specification upon connection) serves as a
+ * wildcard and matches any detail argument passed in to emission.
+ */
/* pre allocation configurations
*/
#define MAX_STACK_VALUES (16)
-#define HANDLER_PRE_ALLOC (48)
-#define EMISSION_PRE_ALLOC (16)
-#define REPORT_BUG "please report occourance circumstances to gtk-devel-list@gnome.org"
+#define REPORT_BUG "please report occurrence circumstances to gtk-devel-list@gnome.org"
#ifdef G_ENABLE_DEBUG
#define IF_DEBUG(debug_type, cond) if ((_g_type_debug_flags & G_TYPE_DEBUG_ ## debug_type) || cond)
-static volatile gpointer *g_trace_instance_signals = NULL;
-static volatile gpointer *g_trap_instance_signals = NULL;
+static volatile gpointer g_trace_instance_signals = NULL;
+static volatile gpointer g_trap_instance_signals = NULL;
#endif /* G_ENABLE_DEBUG */
-/* --- generic allocation --- */
-/* we special case allocations generically by replacing
- * these functions with more speed/memory aware variants
- */
-#ifndef DISABLE_MEM_POOLS
-static inline gpointer
-g_generic_node_alloc (GTrashStack **trash_stack_p,
- guint sizeof_node,
- guint nodes_pre_alloc)
-{
- gpointer node = g_trash_stack_pop (trash_stack_p);
-
- if (!node)
- {
- guint8 *block;
-
- nodes_pre_alloc = MAX (nodes_pre_alloc, 1);
- block = g_malloc (sizeof_node * nodes_pre_alloc);
- while (--nodes_pre_alloc)
- {
- g_trash_stack_push (trash_stack_p, block);
- block += sizeof_node;
- }
- node = block;
- }
-
- return node;
-}
-#define g_generic_node_free(trash_stack_p, node) g_trash_stack_push (trash_stack_p, node)
-#else /* !DISABLE_MEM_POOLS */
-#define g_generic_node_alloc(t,sizeof_node,p) g_malloc (sizeof_node)
-#define g_generic_node_free(t,node) g_free (node)
-#endif /* !DISABLE_MEM_POOLS */
-
-
/* --- typedefs --- */
typedef struct _SignalNode SignalNode;
typedef struct _SignalKey SignalKey;
static inline void handler_unref_R (guint signal_id,
gpointer instance,
Handler *handler);
+static gint handler_lists_cmp (gconstpointer node1,
+ gconstpointer node2);
static inline void emission_push (Emission **emission_list_p,
- guint signal_id,
- GQuark detail,
- gpointer instance,
- EmissionState *state_p);
+ Emission *emission);
static inline void emission_pop (Emission **emission_list_p,
- EmissionState *state_p);
+ Emission *emission);
static inline Emission* emission_find (Emission *emission_list,
guint signal_id,
GQuark detail,
gpointer instance);
+static gint class_closures_cmp (gconstpointer node1,
+ gconstpointer node2);
static gint signal_key_cmp (gconstpointer node1,
gconstpointer node2);
static gboolean signal_emit_unlocked_R (SignalNode *node,
gpointer instance,
GValue *return_value,
const GValue *instance_and_params);
+static const gchar * type_debug_name (GType type);
/* --- structures --- */
/* permanent portion */
guint signal_id;
GType itype;
- gchar *name;
+ const gchar *name;
guint destroyed : 1;
/* reinitializable portion */
+ guint test_class_offset : 12;
guint flags : 8;
guint n_params : 8;
GType *param_types; /* mangled with G_SIGNAL_TYPE_STATIC_SCOPE flag */
GType return_type; /* mangled with G_SIGNAL_TYPE_STATIC_SCOPE flag */
- GClosure *class_closure;
+ GBSearchArray *class_closure_bsa;
SignalAccumulator *accumulator;
GSignalCMarshaller c_marshaller;
GHookList *emission_hooks;
};
+#define MAX_TEST_CLASS_OFFSET (4096) /* 2^12, 12 bits for test_class_offset */
+#define TEST_CLASS_MAGIC (1) /* indicates NULL class closure, candidate for NOP optimization */
struct _SignalKey
{
struct _Emission
{
- Emission *next;
- guint signal_id;
- GQuark detail;
- gpointer instance;
- EmissionState *state_p;
+ Emission *next;
+ gpointer instance;
+ GSignalInvocationHint ihint;
+ EmissionState state;
+ GType chain_type;
};
struct _HandlerList
{
guint signal_id;
Handler *handlers;
+ Handler *tail_before; /* normal signal handlers are appended here */
+ Handler *tail_after; /* CONNECT_AFTER handlers are appended here */
};
+
struct _Handler
{
gulong sequential_number;
Handler *next;
Handler *prev;
GQuark detail;
- guint ref_count : 16;
-#define HANDLER_MAX_REF_COUNT (1 << 16)
- guint block_count : 12;
-#define HANDLER_MAX_BLOCK_COUNT (1 << 12)
+ guint ref_count;
+ guint block_count : 16;
+#define HANDLER_MAX_BLOCK_COUNT (1 << 16)
guint after : 1;
GClosure *closure;
};
{
Handler *handler;
HandlerMatch *next;
- union {
- guint signal_id;
- gpointer dummy;
- } d;
+ guint signal_id;
};
+typedef struct
+{
+ GType instance_type; /* 0 for default closure */
+ GClosure *closure;
+} ClassClosure;
+
/* --- variables --- */
-static GBSearchArray g_signal_key_bsa = G_STATIC_BSEARCH_ARRAY_INIT (sizeof (SignalKey),
- signal_key_cmp,
- G_BSEARCH_ARRAY_ALIGN_POWER2);
+static GBSearchArray *g_signal_key_bsa = NULL;
+static const GBSearchConfig g_signal_key_bconfig = {
+ sizeof (SignalKey),
+ signal_key_cmp,
+ G_BSEARCH_ARRAY_ALIGN_POWER2,
+};
+static GBSearchConfig g_signal_hlbsa_bconfig = {
+ sizeof (HandlerList),
+ handler_lists_cmp,
+ 0,
+};
+static GBSearchConfig g_class_closure_bconfig = {
+ sizeof (ClassClosure),
+ class_closures_cmp,
+ 0,
+};
static GHashTable *g_handler_list_bsa_ht = NULL;
static Emission *g_recursive_emissions = NULL;
static Emission *g_restart_emissions = NULL;
-static GTrashStack *g_handler_ts = NULL;
-static GTrashStack *g_emission_ts = NULL;
static gulong g_handler_sequential_number = 1;
G_LOCK_DEFINE_STATIC (g_signal_mutex);
#define SIGNAL_LOCK() G_LOCK (g_signal_mutex)
key.quark = quark;
- /* try looking up signals for this type and its anchestors */
+ /* try looking up signals for this type and its ancestors */
do
{
SignalKey *signal_key;
key.itype = type;
- signal_key = g_bsearch_array_lookup (&g_signal_key_bsa, &key);
+ signal_key = g_bsearch_array_lookup (g_signal_key_bsa, &g_signal_key_bconfig, &key);
if (signal_key)
return signal_key->signal_id;
SignalKey *signal_key;
key.itype = ifaces[n_ifaces];
- signal_key = g_bsearch_array_lookup (&g_signal_key_bsa, &key);
+ signal_key = g_bsearch_array_lookup (g_signal_key_bsa, &g_signal_key_bconfig, &key);
if (signal_key)
{
}
static gint
+class_closures_cmp (gconstpointer node1,
+ gconstpointer node2)
+{
+ const ClassClosure *c1 = node1, *c2 = node2;
+
+ return G_BSEARCH_ARRAY_CMP (c1->instance_type, c2->instance_type);
+}
+
+static gint
handler_lists_cmp (gconstpointer node1,
gconstpointer node2)
{
GBSearchArray *hlbsa = g_hash_table_lookup (g_handler_list_bsa_ht, instance);
HandlerList key;
+ key.signal_id = signal_id;
+ key.handlers = NULL;
+ key.tail_before = NULL;
+ key.tail_after = NULL;
if (!hlbsa)
{
- hlbsa = g_bsearch_array_new (sizeof (HandlerList), handler_lists_cmp, G_BSEARCH_ARRAY_DEFER_SHRINK);
+ hlbsa = g_bsearch_array_create (&g_signal_hlbsa_bconfig);
+ hlbsa = g_bsearch_array_insert (hlbsa, &g_signal_hlbsa_bconfig, &key);
g_hash_table_insert (g_handler_list_bsa_ht, instance, hlbsa);
}
- key.signal_id = signal_id;
- key.handlers = NULL;
-
- return g_bsearch_array_insert (hlbsa, &key, FALSE);
+ else
+ {
+ GBSearchArray *o = hlbsa;
+
+ hlbsa = g_bsearch_array_insert (o, &g_signal_hlbsa_bconfig, &key);
+ if (hlbsa != o)
+ g_hash_table_insert (g_handler_list_bsa_ht, instance, hlbsa);
+ }
+ return g_bsearch_array_lookup (hlbsa, &g_signal_hlbsa_bconfig, &key);
}
static inline HandlerList*
key.signal_id = signal_id;
- return hlbsa ? g_bsearch_array_lookup (hlbsa, &key) : NULL;
+ return hlbsa ? g_bsearch_array_lookup (hlbsa, &g_signal_hlbsa_bconfig, &key) : NULL;
}
static Handler*
for (i = 0; i < hlbsa->n_nodes; i++)
{
- HandlerList *hlist = g_bsearch_array_get_nth (hlbsa, i);
+ HandlerList *hlist = g_bsearch_array_get_nth (hlbsa, &g_signal_hlbsa_bconfig, i);
Handler *handler;
for (handler = hlist->handlers; handler; handler = handler->next)
{
HandlerMatch *node;
- /* yeah, we could use our own memchunk here, introducing yet more
- * rarely used cached nodes and extra allocation overhead.
- * instead, we use GList* nodes, since they are exactly the size
- * we need and are already cached. g_signal_init() asserts this.
- */
- node = (HandlerMatch*) g_list_alloc ();
+ node = g_slice_new (HandlerMatch);
node->handler = handler;
node->next = list;
- node->d.signal_id = signal_id;
+ node->signal_id = signal_id;
handler_ref (handler);
return node;
{
HandlerMatch *next = node->next;
- handler_unref_R (node->d.signal_id, instance, node->handler);
- g_list_free_1 ((GList*) node);
+ handler_unref_R (node->signal_id, instance, node->handler);
+ g_slice_free (HandlerMatch, node);
return next;
}
for (i = 0; i < hlbsa->n_nodes; i++)
{
- HandlerList *hlist = g_bsearch_array_get_nth (hlbsa, i);
+ HandlerList *hlist = g_bsearch_array_get_nth (hlbsa, &g_signal_hlbsa_bconfig, i);
SignalNode *node = NULL;
Handler *handler;
static inline Handler*
handler_new (gboolean after)
{
- Handler *handler = g_generic_node_alloc (&g_handler_ts,
- sizeof (Handler),
- HANDLER_PRE_ALLOC);
+ Handler *handler = g_slice_new (Handler);
#ifndef G_DISABLE_CHECKS
if (g_handler_sequential_number < 1)
g_error (G_STRLOC ": handler id overflow, %s", REPORT_BUG);
{
g_return_if_fail (handler->ref_count > 0);
-#ifndef G_DISABLE_CHECKS
- if (handler->ref_count >= HANDLER_MAX_REF_COUNT - 1)
- g_error (G_STRLOC ": handler ref_count overflow, %s", REPORT_BUG);
-#endif
-
- handler->ref_count += 1;
+ g_atomic_int_inc (&handler->ref_count);
}
static inline void
gpointer instance,
Handler *handler)
{
+ gboolean is_zero;
+
g_return_if_fail (handler->ref_count > 0);
- handler->ref_count -= 1;
- if (!handler->ref_count)
+ is_zero = g_atomic_int_dec_and_test (&handler->ref_count);
+
+ if (G_UNLIKELY (is_zero))
{
+ HandlerList *hlist = NULL;
+
if (handler->next)
handler->next->prev = handler->prev;
- if (handler->prev) /* watch out for g_signal_handlers_destroy()! */
+ if (handler->prev) /* watch out for g_signal_handlers_destroy()! */
handler->prev->next = handler->next;
else
{
- HandlerList *hlist = handler_list_lookup (signal_id, instance);
-
+ hlist = handler_list_lookup (signal_id, instance);
hlist->handlers = handler->next;
}
+
+ if (instance)
+ {
+ /* check if we are removing the handler pointed to by tail_before */
+ if (!handler->after && (!handler->next || handler->next->after))
+ {
+ if (!hlist)
+ hlist = handler_list_lookup (signal_id, instance);
+ if (hlist)
+ {
+ g_assert (hlist->tail_before == handler); /* paranoid */
+ hlist->tail_before = handler->prev;
+ }
+ }
+
+ /* check if we are removing the handler pointed to by tail_after */
+ if (!handler->next)
+ {
+ if (!hlist)
+ hlist = handler_list_lookup (signal_id, instance);
+ if (hlist)
+ {
+ g_assert (hlist->tail_after == handler); /* paranoid */
+ hlist->tail_after = handler->prev;
+ }
+ }
+ }
+
SIGNAL_UNLOCK ();
g_closure_unref (handler->closure);
SIGNAL_LOCK ();
- g_generic_node_free (&g_handler_ts, handler);
+ g_slice_free (Handler, handler);
}
}
hlist = handler_list_ensure (signal_id, instance);
if (!hlist->handlers)
- hlist->handlers = handler;
- else if (hlist->handlers->after && !handler->after)
{
- handler->next = hlist->handlers;
- hlist->handlers->prev = handler;
hlist->handlers = handler;
+ if (!handler->after)
+ hlist->tail_before = handler;
+ }
+ else if (handler->after)
+ {
+ handler->prev = hlist->tail_after;
+ hlist->tail_after->next = handler;
}
else
{
- Handler *tmp = hlist->handlers;
-
- if (handler->after)
- while (tmp->next)
- tmp = tmp->next;
- else
- while (tmp->next && !tmp->next->after)
- tmp = tmp->next;
- if (tmp->next)
- tmp->next->prev = handler;
- handler->next = tmp->next;
- handler->prev = tmp;
- tmp->next = handler;
+ if (hlist->tail_before)
+ {
+ handler->next = hlist->tail_before->next;
+ if (handler->next)
+ handler->next->prev = handler;
+ handler->prev = hlist->tail_before;
+ hlist->tail_before->next = handler;
+ }
+ else /* insert !after handler into a list of only after handlers */
+ {
+ handler->next = hlist->handlers;
+ if (handler->next)
+ handler->next->prev = handler;
+ hlist->handlers = handler;
+ }
+ hlist->tail_before = handler;
}
+
+ if (!handler->next)
+ hlist->tail_after = handler;
}
static inline void
-emission_push (Emission **emission_list_p,
- guint signal_id,
- GQuark detail,
- gpointer instance,
- EmissionState *state_p)
-{
- Emission *emission = g_generic_node_alloc (&g_emission_ts,
- sizeof (Emission),
- EMISSION_PRE_ALLOC);
+emission_push (Emission **emission_list_p,
+ Emission *emission)
+{
emission->next = *emission_list_p;
- emission->signal_id = signal_id;
- emission->detail = detail;
- emission->instance = instance;
- emission->state_p = state_p;
*emission_list_p = emission;
}
static inline void
-emission_pop (Emission **emission_list_p,
- EmissionState *state_p)
+emission_pop (Emission **emission_list_p,
+ Emission *emission)
{
- Emission **loc = emission_list_p, *emission = *loc;
-
- while (emission->state_p != state_p)
- {
- loc = &emission->next;
- emission = *loc;
- }
- *loc = emission->next;
- g_generic_node_free (&g_emission_ts, emission);
+ Emission *node, *last = NULL;
+
+ for (node = *emission_list_p; node; last = node, node = last->next)
+ if (node == emission)
+ {
+ if (last)
+ last->next = node->next;
+ else
+ *emission_list_p = node->next;
+ return;
+ }
+ g_assert_not_reached ();
}
static inline Emission*
for (emission = emission_list; emission; emission = emission->next)
if (emission->instance == instance &&
- emission->signal_id == signal_id &&
- emission->detail == detail)
+ emission->ihint.signal_id == signal_id &&
+ emission->ihint.detail == detail)
return emission;
return NULL;
}
+static inline Emission*
+emission_find_innermost (gpointer instance)
+{
+ Emission *emission, *s = NULL, *c = NULL;
+
+ for (emission = g_restart_emissions; emission; emission = emission->next)
+ if (emission->instance == instance)
+ {
+ s = emission;
+ break;
+ }
+ for (emission = g_recursive_emissions; emission; emission = emission->next)
+ if (emission->instance == instance)
+ {
+ c = emission;
+ break;
+ }
+ if (!s)
+ return c;
+ else if (!c)
+ return s;
+ else
+ return G_HAVE_GROWING_STACK ? MAX (c, s) : MIN (c, s);
+}
+
static gint
signal_key_cmp (gconstpointer node1,
gconstpointer node2)
}
void
-g_signal_init (void) /* sync with gtype.c */
+g_signal_init (void)
{
SIGNAL_LOCK ();
if (!g_n_signal_nodes)
{
- /* handler_id_node_prepend() requires this */
- g_assert (sizeof (GList) == sizeof (HandlerMatch));
-
/* setup handler list binary searchable array hash table (in german, that'd be one word ;) */
g_handler_list_bsa_ht = g_hash_table_new (g_direct_hash, NULL);
+ g_signal_key_bsa = g_bsearch_array_create (&g_signal_key_bconfig);
/* invalid (0) signal_id */
g_n_signal_nodes = 1;
if (node->destroyed)
g_warning (G_STRLOC ": signal \"%s\" of type `%s' already destroyed",
node->name,
- g_type_name (node->itype));
+ type_debug_name (node->itype));
else
signal_destroy_R (node);
}
SIGNAL_UNLOCK ();
}
+/**
+ * g_signal_stop_emission:
+ * @instance: the object whose signal handlers you wish to stop.
+ * @signal_id: the signal identifier, as returned by g_signal_lookup().
+ * @detail: the detail which the signal was emitted with.
+ *
+ * Stops a signal's current emission.
+ *
+ * This will prevent the default method from running, if the signal was
+ * %G_SIGNAL_RUN_LAST and you connected normally (i.e. without the "after"
+ * flag).
+ *
+ * Prints a warning if used on a signal which isn't being emitted.
+ */
void
g_signal_stop_emission (gpointer instance,
guint signal_id,
if (emission)
{
- if (*emission->state_p == EMISSION_HOOK)
+ if (emission->state == EMISSION_HOOK)
g_warning (G_STRLOC ": emission of signal \"%s\" for instance `%p' cannot be stopped from emission hook",
node->name, instance);
- else if (*emission->state_p == EMISSION_RUN)
- *emission->state_p = EMISSION_STOP;
+ else if (emission->state == EMISSION_RUN)
+ emission->state = EMISSION_STOP;
}
else
g_warning (G_STRLOC ": no emission of signal \"%s\" to stop for instance `%p'",
}
}
+/**
+ * g_signal_add_emission_hook:
+ * @signal_id: the signal identifier, as returned by g_signal_lookup().
+ * @detail: the detail on which to call the hook.
+ * @hook_func: a #GSignalEmissionHook function.
+ * @hook_data: user data for @hook_func.
+ * @data_destroy: a #GDestroyNotify for @hook_data.
+ *
+ * Adds an emission hook for a signal, which will get called for any emission
+ * of that signal, independent of the instance. This is possible only
+ * for signals which don't have #G_SIGNAL_NO_HOOKS flag set.
+ *
+ * Returns: the hook id, for later use with g_signal_remove_emission_hook().
+ */
gulong
g_signal_add_emission_hook (guint signal_id,
GQuark detail,
SIGNAL_LOCK ();
node = LOOKUP_SIGNAL_NODE (signal_id);
- if (!node || node->destroyed || (node->flags & G_SIGNAL_NO_HOOKS))
+ if (!node || node->destroyed)
{
g_warning ("%s: invalid signal id `%u'", G_STRLOC, signal_id);
SIGNAL_UNLOCK ();
return 0;
}
+ if (node->flags & G_SIGNAL_NO_HOOKS)
+ {
+ g_warning ("%s: signal id `%u' does not support emission hooks (G_SIGNAL_NO_HOOKS flag set)", G_STRLOC, signal_id);
+ SIGNAL_UNLOCK ();
+ return 0;
+ }
if (detail && !(node->flags & G_SIGNAL_DETAILED))
{
g_warning ("%s: signal id `%u' does not support detail (%u)", G_STRLOC, signal_id, detail);
}
hook = g_hook_alloc (node->emission_hooks);
hook->data = hook_data;
- hook->func = hook_func;
+ hook->func = (gpointer) hook_func;
hook->destroy = data_destroy;
signal_hook = SIGNAL_HOOK (hook);
signal_hook->detail = detail;
return hook->hook_id;
}
+/**
+ * g_signal_remove_emission_hook:
+ * @signal_id: the id of the signal
+ * @hook_id: the id of the emission hook, as returned by
+ * g_signal_add_emission_hook()
+ *
+ * Deletes an emission hook.
+ */
void
g_signal_remove_emission_hook (guint signal_id,
gulong hook_id)
return signal_id;
}
+/**
+ * g_signal_parse_name:
+ * @detailed_signal: a string of the form "signal-name::detail".
+ * @itype: The interface/instance type that introduced "signal-name".
+ * @signal_id_p: Location to store the signal id.
+ * @detail_p: Location to store the detail quark.
+ * @force_detail_quark: %TRUE forces creation of a #GQuark for the detail.
+ *
+ * Internal function to parse a signal name into its @signal_id
+ * and @detail quark.
+ *
+ * Returns: Whether the signal name could successfully be parsed and @signal_id_p and @detail_p contain valid return values.
+ */
gboolean
g_signal_parse_name (const gchar *detailed_signal,
GType itype,
return TRUE;
}
+/**
+ * g_signal_stop_emission_by_name:
+ * @instance: the object whose signal handlers you wish to stop.
+ * @detailed_signal: a string of the form "signal-name::detail".
+ *
+ * Stops a signal's current emission.
+ *
+ * This is just like g_signal_stop_emission() except it will look up the
+ * signal id for you.
+ */
void
g_signal_stop_emission_by_name (gpointer instance,
const gchar *detailed_signal)
if (emission)
{
- if (*emission->state_p == EMISSION_HOOK)
+ if (emission->state == EMISSION_HOOK)
g_warning (G_STRLOC ": emission of signal \"%s\" for instance `%p' cannot be stopped from emission hook",
node->name, instance);
- else if (*emission->state_p == EMISSION_RUN)
- *emission->state_p = EMISSION_STOP;
+ else if (emission->state == EMISSION_RUN)
+ emission->state = EMISSION_STOP;
}
else
g_warning (G_STRLOC ": no emission of signal \"%s\" to stop for instance `%p'",
SIGNAL_UNLOCK ();
}
+/**
+ * g_signal_lookup:
+ * @name: the signal's name.
+ * @itype: the type that the signal operates on.
+ *
+ * Given the name of the signal and the type of object it connects to, gets
+ * the signal's identifying integer. Emitting the signal by number is
+ * somewhat faster than using the name each time.
+ *
+ * Also tries the ancestors of the given type.
+ *
+ * See g_signal_new() for details on allowed signal names.
+ *
+ * Returns: the signal's identifying number, or 0 if no signal was found.
+ */
guint
g_signal_lookup (const gchar *name,
GType itype)
{
guint signal_id;
-
g_return_val_if_fail (name != NULL, 0);
g_return_val_if_fail (G_TYPE_IS_INSTANTIATABLE (itype) || G_TYPE_IS_INTERFACE (itype), 0);
{
/* give elaborate warnings */
if (!g_type_name (itype))
- g_warning (G_STRLOC ": unable to lookup signal \"%s\" for invalid type id `%u'",
+ g_warning (G_STRLOC ": unable to lookup signal \"%s\" for invalid type id `%"G_GSIZE_FORMAT"'",
name, itype);
else if (!G_TYPE_IS_INSTANTIATABLE (itype))
g_warning (G_STRLOC ": unable to lookup signal \"%s\" for non instantiatable type `%s'",
return signal_id;
}
+/**
+ * g_signal_list_ids:
+ * @itype: Instance or interface type.
+ * @n_ids: Location to store the number of signal ids for @itype.
+ *
+ * Lists the signals by id that a certain instance or interface type
+ * created. Further information about the signals can be acquired through
+ * g_signal_query().
+ *
+ * Returns: Newly allocated array of signal IDs.
+ */
guint*
g_signal_list_ids (GType itype,
guint *n_ids)
g_return_val_if_fail (n_ids != NULL, NULL);
SIGNAL_LOCK ();
- keys = g_signal_key_bsa.nodes;
- n_nodes = g_signal_key_bsa.n_nodes;
+ keys = g_bsearch_array_get_nth (g_signal_key_bsa, &g_signal_key_bconfig, 0);
+ n_nodes = g_bsearch_array_get_n_nodes (g_signal_key_bsa);
result = g_array_new (FALSE, FALSE, sizeof (guint));
for (i = 0; i < n_nodes; i++)
{
/* give elaborate warnings */
if (!g_type_name (itype))
- g_warning (G_STRLOC ": unable to list signals for invalid type id `%u'",
+ g_warning (G_STRLOC ": unable to list signals for invalid type id `%"G_GSIZE_FORMAT"'",
itype);
- else if (!G_TYPE_IS_INSTANTIATABLE (itype))
+ else if (!G_TYPE_IS_INSTANTIATABLE (itype) && !G_TYPE_IS_INTERFACE (itype))
g_warning (G_STRLOC ": unable to list signals of non instantiatable type `%s'",
g_type_name (itype));
- else if (!g_type_class_peek (itype))
+ else if (!g_type_class_peek (itype) && !G_TYPE_IS_INTERFACE (itype))
g_warning (G_STRLOC ": unable to list signals of unloaded type `%s'",
g_type_name (itype));
}
return (guint*) g_array_free (result, FALSE);
}
+/**
+ * g_signal_name:
+ * @signal_id: the signal's identifying number.
+ *
+ * Given the signal's identifier, finds its name.
+ *
+ * Two different signals may have the same name, if they have differing types.
+ *
+ * Returns: the signal name, or %NULL if the signal number was invalid.
+ */
G_CONST_RETURN gchar*
g_signal_name (guint signal_id)
{
SignalNode *node;
- gchar *name;
+ const gchar *name;
SIGNAL_LOCK ();
node = LOOKUP_SIGNAL_NODE (signal_id);
name = node ? node->name : NULL;
SIGNAL_UNLOCK ();
- return name;
+ return (char*) name;
}
+/**
+ * g_signal_query:
+ * @signal_id: The signal id of the signal to query information for.
+ * @query: A user provided structure that is filled in with constant
+ * values upon success.
+ *
+ * Queries the signal system for in-depth information about a
+ * specific signal. This function will fill in a user-provided
+ * structure to hold signal-specific information. If an invalid
+ * signal id is passed in, the @signal_id member of the #GSignalQuery
+ * is 0. All members filled into the #GSignalQuery structure should
+ * be considered constant and have to be left untouched.
+ */
void
g_signal_query (guint signal_id,
GSignalQuery *query)
SIGNAL_UNLOCK ();
}
-guint
-g_signal_new_valist (const gchar *signal_name,
- GType itype,
- GSignalFlags signal_flags,
- GClosure *class_closure,
- GSignalAccumulator accumulator,
- gpointer accu_data,
- GSignalCMarshaller c_marshaller,
- GType return_type,
- guint n_params,
- va_list args)
-{
- GType *param_types;
- guint i;
- guint signal_id;
-
- if (n_params > 0)
- {
- param_types = g_new (GType, n_params);
-
- for (i = 0; i < n_params; i++)
- param_types[i] = va_arg (args, GType);
- }
- else
- param_types = NULL;
-
- signal_id = g_signal_newv (signal_name, itype, signal_flags,
- class_closure, accumulator, accu_data, c_marshaller,
- return_type, n_params, param_types);
- g_free (param_types);
-
- return signal_id;
-}
-
+/**
+ * g_signal_new:
+ * @signal_name: the name for the signal
+ * @itype: the type this signal pertains to. It will also pertain to
+ * types which are derived from this type.
+ * @signal_flags: a combination of #GSignalFlags specifying detail of when
+ * the default handler is to be invoked. You should at least specify
+ * %G_SIGNAL_RUN_FIRST or %G_SIGNAL_RUN_LAST.
+ * @class_offset: The offset of the function pointer in the class structure
+ * for this type. Used to invoke a class method generically. Pass 0 to
+ * not associate a class method with this signal.
+ * @accumulator: the accumulator for this signal; may be %NULL.
+ * @accu_data: user data for the @accumulator.
+ * @c_marshaller: the function to translate arrays of parameter values to
+ * signal emissions into C language callback invocations.
+ * @return_type: the type of return value, or #G_TYPE_NONE for a signal
+ * without a return value.
+ * @n_params: the number of parameter types to follow.
+ * @...: a list of types, one for each parameter.
+ *
+ * Creates a new signal. (This is usually done in the class initializer.)
+ *
+ * A signal name consists of segments consisting of ASCII letters and
+ * digits, separated by either the '-' or '_' character. The first
+ * character of a signal name must be a letter. Names which violate these
+ * rules lead to undefined behaviour of the GSignal system.
+ *
+ * When registering a signal and looking up a signal, either separator can
+ * be used, but they cannot be mixed.
+ *
+ * Returns: the signal id
+ */
guint
g_signal_new (const gchar *signal_name,
GType itype,
return_type, n_params, args);
va_end (args);
+
+ /* optimize NOP emissions with NULL class handlers */
+ if (signal_id && G_TYPE_IS_INSTANTIATABLE (itype) && return_type == G_TYPE_NONE &&
+ class_offset && class_offset < MAX_TEST_CLASS_OFFSET)
+ {
+ SignalNode *node;
+
+ SIGNAL_LOCK ();
+ node = LOOKUP_SIGNAL_NODE (signal_id);
+ node->test_class_offset = class_offset;
+ SIGNAL_UNLOCK ();
+ }
return signal_id;
}
+static inline ClassClosure*
+signal_find_class_closure (SignalNode *node,
+ GType itype)
+{
+ GBSearchArray *bsa = node->class_closure_bsa;
+ ClassClosure *cc;
+
+ if (bsa)
+ {
+ ClassClosure key;
+
+ /* cc->instance_type is 0 for default closure */
+
+ key.instance_type = itype;
+ cc = g_bsearch_array_lookup (bsa, &g_class_closure_bconfig, &key);
+ while (!cc && key.instance_type)
+ {
+ key.instance_type = g_type_parent (key.instance_type);
+ cc = g_bsearch_array_lookup (bsa, &g_class_closure_bconfig, &key);
+ }
+ }
+ else
+ cc = NULL;
+ return cc;
+}
+
+static inline GClosure*
+signal_lookup_closure (SignalNode *node,
+ GTypeInstance *instance)
+{
+ ClassClosure *cc;
+
+ if (node->class_closure_bsa && g_bsearch_array_get_n_nodes (node->class_closure_bsa) == 1)
+ cc = g_bsearch_array_get_nth (node->class_closure_bsa, &g_class_closure_bconfig, 0);
+ else
+ cc = signal_find_class_closure (node, G_TYPE_FROM_INSTANCE (instance));
+ return cc ? cc->closure : NULL;
+}
+
+static void
+signal_add_class_closure (SignalNode *node,
+ GType itype,
+ GClosure *closure)
+{
+ ClassClosure key;
+
+ /* can't optimize NOP emissions with overridden class closures */
+ node->test_class_offset = 0;
+
+ if (!node->class_closure_bsa)
+ node->class_closure_bsa = g_bsearch_array_create (&g_class_closure_bconfig);
+ key.instance_type = itype;
+ key.closure = g_closure_ref (closure);
+ node->class_closure_bsa = g_bsearch_array_insert (node->class_closure_bsa,
+ &g_class_closure_bconfig,
+ &key);
+ g_closure_sink (closure);
+ if (node->c_marshaller && closure && G_CLOSURE_NEEDS_MARSHAL (closure))
+ g_closure_set_marshal (closure, node->c_marshaller);
+}
+
+/**
+ * g_signal_newv:
+ * @signal_name: the name for the signal
+ * @itype: the type this signal pertains to. It will also pertain to
+ * types which are derived from this type.
+ * @signal_flags: a combination of #GSignalFlags specifying detail of when
+ * the default handler is to be invoked. You should at least specify
+ * %G_SIGNAL_RUN_FIRST or %G_SIGNAL_RUN_LAST.
+ * @class_closure: The closure to invoke on signal emission; may be %NULL.
+ * @accumulator: the accumulator for this signal; may be %NULL.
+ * @accu_data: user data for the @accumulator.
+ * @c_marshaller: the function to translate arrays of parameter values to
+ * signal emissions into C language callback invocations.
+ * @return_type: the type of return value, or #G_TYPE_NONE for a signal
+ * without a return value.
+ * @n_params: the length of @param_types.
+ * @param_types: an array types, one for each parameter.
+ *
+ * Creates a new signal. (This is usually done in the class initializer.)
+ *
+ * See g_signal_new() for details on allowed signal names.
+ *
+ * Returns: the signal id
+ */
guint
g_signal_newv (const gchar *signal_name,
GType itype,
{
g_warning (G_STRLOC ": signal \"%s\" already exists in the `%s' %s",
name,
- g_type_name (node->itype),
+ type_debug_name (node->itype),
G_TYPE_IS_INTERFACE (node->itype) ? "interface" : "class ancestry");
g_free (name);
SIGNAL_UNLOCK ();
{
g_warning (G_STRLOC ": signal \"%s\" for type `%s' was previously created for type `%s'",
name,
- g_type_name (itype),
- g_type_name (node->itype));
+ type_debug_name (itype),
+ type_debug_name (node->itype));
g_free (name);
SIGNAL_UNLOCK ();
return 0;
if (!G_TYPE_IS_VALUE (param_types[i] & ~G_SIGNAL_TYPE_STATIC_SCOPE))
{
g_warning (G_STRLOC ": parameter %d of type `%s' for signal \"%s::%s\" is not a value type",
- i + 1, g_type_name (param_types[i] & ~G_SIGNAL_TYPE_STATIC_SCOPE), g_type_name (itype), name);
+ i + 1, type_debug_name (param_types[i]), type_debug_name (itype), name);
g_free (name);
SIGNAL_UNLOCK ();
return 0;
if (return_type != G_TYPE_NONE && !G_TYPE_IS_VALUE (return_type & ~G_SIGNAL_TYPE_STATIC_SCOPE))
{
g_warning (G_STRLOC ": return value of type `%s' for signal \"%s::%s\" is not a value type",
- g_type_name (return_type & ~G_SIGNAL_TYPE_STATIC_SCOPE), g_type_name (itype), name);
+ type_debug_name (return_type), type_debug_name (itype), name);
g_free (name);
SIGNAL_UNLOCK ();
return 0;
(signal_flags & (G_SIGNAL_RUN_FIRST | G_SIGNAL_RUN_LAST | G_SIGNAL_RUN_CLEANUP)) == G_SIGNAL_RUN_FIRST)
{
g_warning (G_STRLOC ": signal \"%s::%s\" has return type `%s' and is only G_SIGNAL_RUN_FIRST",
- g_type_name (itype), name,
- g_type_name (return_type & ~G_SIGNAL_TYPE_STATIC_SCOPE));
+ type_debug_name (itype), name, type_debug_name (return_type));
g_free (name);
SIGNAL_UNLOCK ();
return 0;
key.itype = itype;
key.quark = g_quark_from_string (node->name);
key.signal_id = signal_id;
- g_bsearch_array_insert (&g_signal_key_bsa, &key, FALSE);
- g_strdelimit (node->name, "_", '-');
- key.quark = g_quark_from_static_string (node->name);
- g_bsearch_array_insert (&g_signal_key_bsa, &key, FALSE);
+ g_signal_key_bsa = g_bsearch_array_insert (g_signal_key_bsa, &g_signal_key_bconfig, &key);
+ g_strdelimit (name, "_", '-');
+ node->name = g_intern_string (name);
+ key.quark = g_quark_from_string (name);
+ g_signal_key_bsa = g_bsearch_array_insert (g_signal_key_bsa, &g_signal_key_bconfig, &key);
}
node->destroyed = FALSE;
-
+ node->test_class_offset = 0;
+
/* setup reinitializable portion */
node->flags = signal_flags & G_SIGNAL_FLAGS_MASK;
node->n_params = n_params;
node->param_types = g_memdup (param_types, sizeof (GType) * n_params);
node->return_type = return_type;
- node->class_closure = class_closure ? g_closure_ref (class_closure) : NULL;
- if (class_closure)
- g_closure_sink (class_closure);
+ node->class_closure_bsa = NULL;
if (accumulator)
{
node->accumulator = g_new (SignalAccumulator, 1);
node->accumulator = NULL;
node->c_marshaller = c_marshaller;
node->emission_hooks = NULL;
- if (node->c_marshaller && class_closure && G_CLOSURE_NEEDS_MARSHAL (class_closure))
- g_closure_set_marshal (class_closure, node->c_marshaller);
+ if (class_closure)
+ signal_add_class_closure (node, 0, class_closure);
+ else if (G_TYPE_IS_INSTANTIATABLE (itype) && return_type == G_TYPE_NONE)
+ {
+ /* optimize NOP emissions */
+ node->test_class_offset = TEST_CLASS_MAGIC;
+ }
SIGNAL_UNLOCK ();
+
+ g_free (name);
+
+ return signal_id;
+}
+
+/**
+ * g_signal_new_valist:
+ * @signal_name: the name for the signal
+ * @itype: the type this signal pertains to. It will also pertain to
+ * types which are derived from this type.
+ * @signal_flags: a combination of #GSignalFlags specifying detail of when
+ * the default handler is to be invoked. You should at least specify
+ * %G_SIGNAL_RUN_FIRST or %G_SIGNAL_RUN_LAST.
+ * @class_closure: The closure to invoke on signal emission; may be %NULL.
+ * @accumulator: the accumulator for this signal; may be %NULL.
+ * @accu_data: user data for the @accumulator.
+ * @c_marshaller: the function to translate arrays of parameter values to
+ * signal emissions into C language callback invocations.
+ * @return_type: the type of return value, or #G_TYPE_NONE for a signal
+ * without a return value.
+ * @n_params: the number of parameter types in @args.
+ * @args: va_list of #GType, one for each parameter.
+ *
+ * Creates a new signal. (This is usually done in the class initializer.)
+ *
+ * See g_signal_new() for details on allowed signal names.
+ *
+ * Returns: the signal id
+ */
+guint
+g_signal_new_valist (const gchar *signal_name,
+ GType itype,
+ GSignalFlags signal_flags,
+ GClosure *class_closure,
+ GSignalAccumulator accumulator,
+ gpointer accu_data,
+ GSignalCMarshaller c_marshaller,
+ GType return_type,
+ guint n_params,
+ va_list args)
+{
+ GType *param_types;
+ guint i;
+ guint signal_id;
+
+ if (n_params > 0)
+ {
+ param_types = g_new (GType, n_params);
+
+ for (i = 0; i < n_params; i++)
+ param_types[i] = va_arg (args, GType);
+ }
+ else
+ param_types = NULL;
+
+ signal_id = g_signal_newv (signal_name, itype, signal_flags,
+ class_closure, accumulator, accu_data, c_marshaller,
+ return_type, n_params, param_types);
+ g_free (param_types);
+
return signal_id;
}
signal_destroy_R (SignalNode *signal_node)
{
SignalNode node = *signal_node;
-
+
signal_node->destroyed = TRUE;
/* reentrancy caution, zero out real contents first */
+ signal_node->test_class_offset = 0;
signal_node->n_params = 0;
signal_node->param_types = NULL;
signal_node->return_type = 0;
- signal_node->class_closure = NULL;
+ signal_node->class_closure_bsa = NULL;
signal_node->accumulator = NULL;
signal_node->c_marshaller = NULL;
signal_node->emission_hooks = NULL;
for (emission = (node.flags & G_SIGNAL_NO_RECURSE) ? g_restart_emissions : g_recursive_emissions;
emission; emission = emission->next)
- if (emission->signal_id == node.signal_id)
+ if (emission->ihint.signal_id == node.signal_id)
g_critical (G_STRLOC ": signal \"%s\" being destroyed is currently in emission (instance `%p')",
node.name, emission->instance);
}
*/
SIGNAL_UNLOCK ();
g_free (node.param_types);
- g_closure_unref (node.class_closure);
+ if (node.class_closure_bsa)
+ {
+ guint i;
+
+ for (i = 0; i < node.class_closure_bsa->n_nodes; i++)
+ {
+ ClassClosure *cc = g_bsearch_array_get_nth (node.class_closure_bsa, &g_class_closure_bconfig, i);
+
+ g_closure_unref (cc->closure);
+ }
+ g_bsearch_array_free (node.class_closure_bsa, &g_class_closure_bconfig);
+ }
g_free (node.accumulator);
if (node.emission_hooks)
{
SIGNAL_LOCK ();
}
+/**
+ * g_signal_override_class_closure:
+ * @signal_id: the signal id
+ * @instance_type: the instance type on which to override the class closure
+ * for the signal.
+ * @class_closure: the closure.
+ *
+ * Overrides the class closure (i.e. the default handler) for the given signal
+ * for emissions on instances of @instance_type. @instance_type must be derived
+ * from the type to which the signal belongs.
+ */
+void
+g_signal_override_class_closure (guint signal_id,
+ GType instance_type,
+ GClosure *class_closure)
+{
+ SignalNode *node;
+
+ g_return_if_fail (signal_id > 0);
+ g_return_if_fail (class_closure != NULL);
+
+ SIGNAL_LOCK ();
+ node = LOOKUP_SIGNAL_NODE (signal_id);
+ if (!g_type_is_a (instance_type, node->itype))
+ g_warning ("%s: type `%s' cannot be overridden for signal id `%u'", G_STRLOC, type_debug_name (instance_type), signal_id);
+ else
+ {
+ ClassClosure *cc = signal_find_class_closure (node, instance_type);
+
+ if (cc && cc->instance_type == instance_type)
+ g_warning ("%s: type `%s' is already overridden for signal id `%u'", G_STRLOC, type_debug_name (instance_type), signal_id);
+ else
+ signal_add_class_closure (node, instance_type, class_closure);
+ }
+ SIGNAL_UNLOCK ();
+}
+
+/**
+ * g_signal_chain_from_overridden:
+ * @instance_and_params: the argument list of the signal emission. The first
+ * element in the array is a #GValue for the instance the signal is being
+ * emitted on. The rest are any arguments to be passed to the signal.
+ * @return_value: Location for the return value.
+ *
+ * Calls the original class closure of a signal. This function should only
+ * be called from an overridden class closure; see
+ * g_signal_override_class_closure().
+ */
+void
+g_signal_chain_from_overridden (const GValue *instance_and_params,
+ GValue *return_value)
+{
+ GType chain_type = 0, restore_type = 0;
+ Emission *emission = NULL;
+ GClosure *closure = NULL;
+ guint n_params = 0;
+ gpointer instance;
+
+ g_return_if_fail (instance_and_params != NULL);
+ instance = g_value_peek_pointer (instance_and_params);
+ g_return_if_fail (G_TYPE_CHECK_INSTANCE (instance));
+
+ SIGNAL_LOCK ();
+ emission = emission_find_innermost (instance);
+ if (emission)
+ {
+ SignalNode *node = LOOKUP_SIGNAL_NODE (emission->ihint.signal_id);
+
+ g_assert (node != NULL); /* paranoid */
+
+ /* we should probably do the same parameter checks as g_signal_emit() here.
+ */
+ if (emission->chain_type != G_TYPE_NONE)
+ {
+ ClassClosure *cc = signal_find_class_closure (node, emission->chain_type);
+
+ g_assert (cc != NULL); /* closure currently in call stack */
+
+ n_params = node->n_params;
+ restore_type = cc->instance_type;
+ cc = signal_find_class_closure (node, g_type_parent (cc->instance_type));
+ if (cc && cc->instance_type != restore_type)
+ {
+ closure = cc->closure;
+ chain_type = cc->instance_type;
+ }
+ }
+ else
+ g_warning ("%s: signal id `%u' cannot be chained from current emission stage for instance `%p'", G_STRLOC, node->signal_id, instance);
+ }
+ else
+ g_warning ("%s: no signal is currently being emitted for instance `%p'", G_STRLOC, instance);
+ if (closure)
+ {
+ emission->chain_type = chain_type;
+ SIGNAL_UNLOCK ();
+ g_closure_invoke (closure,
+ return_value,
+ n_params + 1,
+ instance_and_params,
+ &emission->ihint);
+ SIGNAL_LOCK ();
+ emission->chain_type = restore_type;
+ }
+ SIGNAL_UNLOCK ();
+}
+
+/**
+ * g_signal_get_invocation_hint:
+ * @instance: the instance to query
+ *
+ * Returns the invocation hint of the innermost signal emission of instance.
+ *
+ * Returns: the invocation hint of the innermost signal emission.
+ */
+GSignalInvocationHint*
+g_signal_get_invocation_hint (gpointer instance)
+{
+ Emission *emission = NULL;
+
+ g_return_val_if_fail (G_TYPE_CHECK_INSTANCE (instance), NULL);
+
+ SIGNAL_LOCK ();
+ emission = emission_find_innermost (instance);
+ SIGNAL_UNLOCK ();
+
+ return emission ? &emission->ihint : NULL;
+}
+
+/**
+ * g_signal_connect_closure_by_id:
+ * @instance: the instance to connect to.
+ * @signal_id: the id of the signal.
+ * @detail: the detail.
+ * @closure: the closure to connect.
+ * @after: whether the handler should be called before or after the
+ * default handler of the signal.
+ *
+ * Connects a closure to a signal for a particular object.
+ *
+ * Returns: the handler id
+ */
gulong
g_signal_connect_closure_by_id (gpointer instance,
guint signal_id,
return handler_seq_no;
}
+/**
+ * g_signal_connect_closure:
+ * @instance: the instance to connect to.
+ * @detailed_signal: a string of the form "signal-name::detail".
+ * @closure: the closure to connect.
+ * @after: whether the handler should be called before or after the
+ * default handler of the signal.
+ *
+ * Connects a closure to a signal for a particular object.
+ *
+ * Returns: the handler id
+ */
gulong
g_signal_connect_closure (gpointer instance,
const gchar *detailed_signal,
return handler_seq_no;
}
+/**
+ * g_signal_connect_data:
+ * @instance: the instance to connect to.
+ * @detailed_signal: a string of the form "signal-name::detail".
+ * @c_handler: the #GCallback to connect.
+ * @data: data to pass to @c_handler calls.
+ * @destroy_data: a #GClosureNotify for @data.
+ * @connect_flags: a combination of #GConnectFlags.
+ *
+ * Connects a #GCallback function to a signal for a particular object. Similar
+ * to g_signal_connect(), but allows to provide a #GClosureNotify for the data
+ * which will be called when the signal handler is disconnected and no longer
+ * used. Specify @connect_flags if you need <literal>..._after()</literal> or
+ * <literal>..._swapped()</literal> variants of this function.
+ *
+ * Returns: the handler id
+ */
gulong
g_signal_connect_data (gpointer instance,
const gchar *detailed_signal,
return handler_seq_no;
}
+/**
+ * g_signal_handler_block:
+ * @instance: The instance to block the signal handler of.
+ * @handler_id: Handler id of the handler to be blocked.
+ *
+ * Blocks a handler of an instance so it will not be called during any
+ * signal emissions unless it is unblocked again. Thus "blocking" a
+ * signal handler means to temporarily deactive it, a signal handler
+ * has to be unblocked exactly the same amount of times it has been
+ * blocked before to become active again.
+ *
+ * The @handler_id has to be a valid signal handler id, connected to a
+ * signal of @instance.
+ */
void
g_signal_handler_block (gpointer instance,
gulong handler_id)
SIGNAL_UNLOCK ();
}
+/**
+ * g_signal_handler_unblock:
+ * @instance: The instance to unblock the signal handler of.
+ * @handler_id: Handler id of the handler to be unblocked.
+ *
+ * Undoes the effect of a previous g_signal_handler_block() call. A
+ * blocked handler is skipped during signal emissions and will not be
+ * invoked, unblocking it (for exactly the amount of times it has been
+ * blocked before) reverts its "blocked" state, so the handler will be
+ * recognized by the signal system and is called upon future or
+ * currently ongoing signal emissions (since the order in which
+ * handlers are called during signal emissions is deterministic,
+ * whether the unblocked handler in question is called as part of a
+ * currently ongoing emission depends on how far that emission has
+ * proceeded yet).
+ *
+ * The @handler_id has to be a valid id of a signal handler that is
+ * connected to a signal of @instance and is currently blocked.
+ */
void
g_signal_handler_unblock (gpointer instance,
gulong handler_id)
SIGNAL_UNLOCK ();
}
+/**
+ * g_signal_handler_disconnect:
+ * @instance: The instance to remove the signal handler from.
+ * @handler_id: Handler id of the handler to be disconnected.
+ *
+ * Disconnects a handler from an instance so it will not be called during
+ * any future or currently ongoing emissions of the signal it has been
+ * connected to. The @handler_id becomes invalid and may be reused.
+ *
+ * The @handler_id has to be a valid signal handler id, connected to a
+ * signal of @instance.
+ */
void
g_signal_handler_disconnect (gpointer instance,
gulong handler_id)
SIGNAL_UNLOCK ();
}
+/**
+ * g_signal_handler_is_connected:
+ * @instance: The instance where a signal handler is sought.
+ * @handler_id: the handler id.
+ *
+ * Returns whether @handler_id is the id of a handler connected to @instance.
+ *
+ * Returns: whether @handler_id identifies a handler connected to @instance.
+ */
gboolean
g_signal_handler_is_connected (gpointer instance,
gulong handler_id)
gboolean connected;
g_return_val_if_fail (G_TYPE_CHECK_INSTANCE (instance), FALSE);
- g_return_val_if_fail (handler_id > 0, FALSE);
SIGNAL_LOCK ();
handler = handler_lookup (instance, handler_id, NULL);
for (i = 0; i < hlbsa->n_nodes; i++)
{
- HandlerList *hlist = g_bsearch_array_get_nth (hlbsa, i);
+ HandlerList *hlist = g_bsearch_array_get_nth (hlbsa, &g_signal_hlbsa_bconfig, i);
Handler *handler = hlist->handlers;
while (handler)
}
}
}
- g_bsearch_array_destroy (hlbsa);
+ g_bsearch_array_free (hlbsa, &g_signal_hlbsa_bconfig);
}
SIGNAL_UNLOCK ();
}
+/**
+ * g_signal_handler_find:
+ * @instance: The instance owning the signal handler to be found.
+ * @mask: Mask indicating which of @signal_id, @detail, @closure, @func
+ * and/or @data the handler has to match.
+ * @signal_id: Signal the handler has to be connected to.
+ * @detail: Signal detail the handler has to be connected to.
+ * @closure: The closure the handler will invoke.
+ * @func: The C closure callback of the handler (useless for non-C closures).
+ * @data: The closure data of the handler's closure.
+ *
+ * Finds the first signal handler that matches certain selection criteria.
+ * The criteria mask is passed as an OR-ed combination of #GSignalMatchType
+ * flags, and the criteria values are passed as arguments.
+ * The match @mask has to be non-0 for successful matches.
+ * If no handler was found, 0 is returned.
+ *
+ * Returns: A valid non-0 signal handler id for a successful match.
+ */
gulong
g_signal_handler_find (gpointer instance,
GSignalMatchType mask,
return n_handlers;
}
+/**
+ * g_signal_handlers_block_matched:
+ * @instance: The instance to block handlers from.
+ * @mask: Mask indicating which of @signal_id, @detail, @closure, @func
+ * and/or @data the handlers have to match.
+ * @signal_id: Signal the handlers have to be connected to.
+ * @detail: Signal detail the handlers have to be connected to.
+ * @closure: The closure the handlers will invoke.
+ * @func: The C closure callback of the handlers (useless for non-C closures).
+ * @data: The closure data of the handlers' closures.
+ *
+ * Blocks all handlers on an instance that match a certain selection criteria.
+ * The criteria mask is passed as an OR-ed combination of #GSignalMatchType
+ * flags, and the criteria values are passed as arguments.
+ * Passing at least one of the %G_SIGNAL_MATCH_CLOSURE, %G_SIGNAL_MATCH_FUNC
+ * or %G_SIGNAL_MATCH_DATA match flags is required for successful matches.
+ * If no handlers were found, 0 is returned, the number of blocked handlers
+ * otherwise.
+ *
+ * Returns: The number of handlers that matched.
+ */
guint
g_signal_handlers_block_matched (gpointer instance,
GSignalMatchType mask,
{
guint n_handlers = 0;
- g_return_val_if_fail (G_TYPE_CHECK_INSTANCE (instance), FALSE);
- g_return_val_if_fail ((mask & ~G_SIGNAL_MATCH_MASK) == 0, FALSE);
+ g_return_val_if_fail (G_TYPE_CHECK_INSTANCE (instance), 0);
+ g_return_val_if_fail ((mask & ~G_SIGNAL_MATCH_MASK) == 0, 0);
if (mask & (G_SIGNAL_MATCH_CLOSURE | G_SIGNAL_MATCH_FUNC | G_SIGNAL_MATCH_DATA))
{
return n_handlers;
}
+/**
+ * g_signal_handlers_unblock_matched:
+ * @instance: The instance to unblock handlers from.
+ * @mask: Mask indicating which of @signal_id, @detail, @closure, @func
+ * and/or @data the handlers have to match.
+ * @signal_id: Signal the handlers have to be connected to.
+ * @detail: Signal detail the handlers have to be connected to.
+ * @closure: The closure the handlers will invoke.
+ * @func: The C closure callback of the handlers (useless for non-C closures).
+ * @data: The closure data of the handlers' closures.
+ *
+ * Unblocks all handlers on an instance that match a certain selection
+ * criteria. The criteria mask is passed as an OR-ed combination of
+ * #GSignalMatchType flags, and the criteria values are passed as arguments.
+ * Passing at least one of the %G_SIGNAL_MATCH_CLOSURE, %G_SIGNAL_MATCH_FUNC
+ * or %G_SIGNAL_MATCH_DATA match flags is required for successful matches.
+ * If no handlers were found, 0 is returned, the number of unblocked handlers
+ * otherwise. The match criteria should not apply to any handlers that are
+ * not currently blocked.
+ *
+ * Returns: The number of handlers that matched.
+ */
guint
g_signal_handlers_unblock_matched (gpointer instance,
GSignalMatchType mask,
{
guint n_handlers = 0;
- g_return_val_if_fail (G_TYPE_CHECK_INSTANCE (instance), FALSE);
- g_return_val_if_fail ((mask & ~G_SIGNAL_MATCH_MASK) == 0, FALSE);
+ g_return_val_if_fail (G_TYPE_CHECK_INSTANCE (instance), 0);
+ g_return_val_if_fail ((mask & ~G_SIGNAL_MATCH_MASK) == 0, 0);
if (mask & (G_SIGNAL_MATCH_CLOSURE | G_SIGNAL_MATCH_FUNC | G_SIGNAL_MATCH_DATA))
{
return n_handlers;
}
+/**
+ * g_signal_handlers_disconnect_matched:
+ * @instance: The instance to remove handlers from.
+ * @mask: Mask indicating which of @signal_id, @detail, @closure, @func
+ * and/or @data the handlers have to match.
+ * @signal_id: Signal the handlers have to be connected to.
+ * @detail: Signal detail the handlers have to be connected to.
+ * @closure: The closure the handlers will invoke.
+ * @func: The C closure callback of the handlers (useless for non-C closures).
+ * @data: The closure data of the handlers' closures.
+ *
+ * Disconnects all handlers on an instance that match a certain
+ * selection criteria. The criteria mask is passed as an OR-ed
+ * combination of #GSignalMatchType flags, and the criteria values are
+ * passed as arguments. Passing at least one of the
+ * %G_SIGNAL_MATCH_CLOSURE, %G_SIGNAL_MATCH_FUNC or
+ * %G_SIGNAL_MATCH_DATA match flags is required for successful
+ * matches. If no handlers were found, 0 is returned, the number of
+ * disconnected handlers otherwise.
+ *
+ * Returns: The number of handlers that matched.
+ */
guint
g_signal_handlers_disconnect_matched (gpointer instance,
GSignalMatchType mask,
{
guint n_handlers = 0;
- g_return_val_if_fail (G_TYPE_CHECK_INSTANCE (instance), FALSE);
- g_return_val_if_fail ((mask & ~G_SIGNAL_MATCH_MASK) == 0, FALSE);
+ g_return_val_if_fail (G_TYPE_CHECK_INSTANCE (instance), 0);
+ g_return_val_if_fail ((mask & ~G_SIGNAL_MATCH_MASK) == 0, 0);
if (mask & (G_SIGNAL_MATCH_CLOSURE | G_SIGNAL_MATCH_FUNC | G_SIGNAL_MATCH_DATA))
{
return n_handlers;
}
+/**
+ * g_signal_has_handler_pending:
+ * @instance: the object whose signal handlers are sought.
+ * @signal_id: the signal id.
+ * @detail: the detail.
+ * @may_be_blocked: whether blocked handlers should count as match.
+ *
+ * Returns whether there are any handlers connected to @instance for the
+ * given signal id and detail.
+ *
+ * One example of when you might use this is when the arguments to the
+ * signal are difficult to compute. A class implementor may opt to not
+ * emit the signal if no one is attached anyway, thus saving the cost
+ * of building the arguments.
+ *
+ * Returns: %TRUE if a handler is connected to the signal, %FALSE
+ * otherwise.
+ */
gboolean
g_signal_has_handler_pending (gpointer instance,
guint signal_id,
return has_pending;
}
+static inline gboolean
+signal_check_skip_emission (SignalNode *node,
+ gpointer instance,
+ GQuark detail)
+{
+ HandlerList *hlist;
+
+ /* are we able to check for NULL class handlers? */
+ if (!node->test_class_offset)
+ return FALSE;
+
+ /* are there emission hooks pending? */
+ if (node->emission_hooks && node->emission_hooks->hooks)
+ return FALSE;
+
+ /* is there a non-NULL class handler? */
+ if (node->test_class_offset != TEST_CLASS_MAGIC)
+ {
+ GTypeClass *class = G_TYPE_INSTANCE_GET_CLASS (instance, G_TYPE_FROM_INSTANCE (instance), GTypeClass);
+
+ if (G_STRUCT_MEMBER (gpointer, class, node->test_class_offset))
+ return FALSE;
+ }
+
+ /* are signals being debugged? */
+#ifdef G_ENABLE_DEBUG
+ IF_DEBUG (SIGNALS, g_trace_instance_signals || g_trap_instance_signals)
+ return FALSE;
+#endif /* G_ENABLE_DEBUG */
+
+ /* is this a no-recurse signal already in emission? */
+ if (node->flags & G_SIGNAL_NO_RECURSE &&
+ emission_find (g_restart_emissions, node->signal_id, detail, instance))
+ return FALSE;
+
+ /* do we have pending handlers? */
+ hlist = handler_list_lookup (node->signal_id, instance);
+ if (hlist && hlist->handlers)
+ return FALSE;
+
+ /* none of the above, no emission required */
+ return TRUE;
+}
+
+/**
+ * g_signal_emitv:
+ * @instance_and_params: argument list for the signal emission. The first
+ * element in the array is a #GValue for the instance the signal is
+ * being emitted on. The rest are any arguments to be passed to the
+ * signal.
+ * @signal_id: the signal id
+ * @detail: the detail
+ * @return_value: Location to store the return value of the signal emission.
+ *
+ * Emits a signal.
+ *
+ * Note that g_signal_emitv() doesn't change @return_value if no handlers are
+ * connected, in contrast to g_signal_emit() and g_signal_emit_valist().
+ */
void
g_signal_emitv (const GValue *instance_and_params,
guint signal_id,
GQuark detail,
GValue *return_value)
{
- const GValue *param_values;
gpointer instance;
SignalNode *node;
#ifdef G_ENABLE_DEBUG
+ const GValue *param_values;
guint i;
#endif
g_return_if_fail (G_TYPE_CHECK_INSTANCE (instance));
g_return_if_fail (signal_id > 0);
+#ifdef G_ENABLE_DEBUG
param_values = instance_and_params + 1;
-
+#endif
+
SIGNAL_LOCK ();
node = LOOKUP_SIGNAL_NODE (signal_id);
if (!node || !g_type_is_a (G_TYPE_FROM_INSTANCE (instance), node->itype))
{
g_critical ("%s: value for `%s' parameter %u for signal \"%s\" is of type `%s'",
G_STRLOC,
- g_type_name (node->param_types[i] & ~G_SIGNAL_TYPE_STATIC_SCOPE),
+ type_debug_name (node->param_types[i]),
i,
node->name,
G_VALUE_TYPE_NAME (param_values + i));
{
g_critical ("%s: return value `%s' for signal \"%s\" is (NULL)",
G_STRLOC,
- g_type_name (node->return_type & ~G_SIGNAL_TYPE_STATIC_SCOPE),
+ type_debug_name (node->return_type),
node->name);
SIGNAL_UNLOCK ();
return;
{
g_critical ("%s: return value `%s' for signal \"%s\" is of type `%s'",
G_STRLOC,
- g_type_name (node->return_type & ~G_SIGNAL_TYPE_STATIC_SCOPE),
+ type_debug_name (node->return_type),
node->name,
G_VALUE_TYPE_NAME (return_value));
SIGNAL_UNLOCK ();
return_value = NULL;
#endif /* G_ENABLE_DEBUG */
+ /* optimize NOP emissions */
+ if (signal_check_skip_emission (node, instance, detail))
+ {
+ /* nothing to do to emit this signal */
+ SIGNAL_UNLOCK ();
+ /* g_printerr ("omitting emission of \"%s\"\n", node->name); */
+ return;
+ }
+
SIGNAL_UNLOCK ();
signal_emit_unlocked_R (node, detail, instance, return_value, instance_and_params);
}
+/**
+ * g_signal_emit_valist:
+ * @instance: the instance the signal is being emitted on.
+ * @signal_id: the signal id
+ * @detail: the detail
+ * @var_args: a list of parameters to be passed to the signal, followed by a
+ * location for the return value. If the return type of the signal
+ * is #G_TYPE_NONE, the return value location can be omitted.
+ *
+ * Emits a signal.
+ *
+ * Note that g_signal_emit_valist() resets the return value to the default
+ * if no handlers are connected, in contrast to g_signal_emitv().
+ */
void
g_signal_emit_valist (gpointer instance,
guint signal_id,
}
#endif /* !G_DISABLE_CHECKS */
+ /* optimize NOP emissions */
+ if (signal_check_skip_emission (node, instance, detail))
+ {
+ /* nothing to do to emit this signal */
+ SIGNAL_UNLOCK ();
+ /* g_printerr ("omitting emission of \"%s\"\n", node->name); */
+ return;
+ }
+
n_params = node->n_params;
signal_return_type = node->return_type;
if (node->n_params < MAX_STACK_VALUES)
g_free (error);
/* we purposely leak the value here, it might not be
- * in a sane state if an error condition occoured
+ * in a sane state if an error condition occured
*/
}
}
g_free (free_me);
}
+/**
+ * g_signal_emit:
+ * @instance: the instance the signal is being emitted on.
+ * @signal_id: the signal id
+ * @detail: the detail
+ * @...: parameters to be passed to the signal, followed by a
+ * location for the return value. If the return type of the signal
+ * is #G_TYPE_NONE, the return value location can be omitted.
+ *
+ * Emits a signal.
+ *
+ * Note that g_signal_emit() resets the return value to the default
+ * if no handlers are connected, in contrast to g_signal_emitv().
+ */
void
g_signal_emit (gpointer instance,
guint signal_id,
va_end (var_args);
}
+/**
+ * g_signal_emit_by_name:
+ * @instance: the instance the signal is being emitted on.
+ * @detailed_signal: a string of the form "signal-name::detail".
+ * @...: parameters to be passed to the signal, followed by a
+ * location for the return value. If the return type of the signal
+ * is #G_TYPE_NONE, the return value location can be omitted.
+ *
+ * Emits a signal.
+ *
+ * Note that g_signal_emit_by_name() resets the return value to the default
+ * if no handlers are connected, in contrast to g_signal_emitv().
+ */
void
g_signal_emit_by_name (gpointer instance,
const gchar *detailed_signal,
GValue *emission_return,
const GValue *instance_and_params)
{
- EmissionState emission_state = 0;
SignalAccumulator *accumulator;
- GSignalInvocationHint ihint;
+ Emission emission;
GClosure *class_closure;
HandlerList *hlist;
Handler *handler_list = NULL;
signal_id = node->signal_id;
if (node->flags & G_SIGNAL_NO_RECURSE)
{
- Emission *emission = emission_find (g_restart_emissions, signal_id, detail, instance);
+ Emission *node = emission_find (g_restart_emissions, signal_id, detail, instance);
- if (emission)
+ if (node)
{
- *emission->state_p = EMISSION_RESTART;
+ node->state = EMISSION_RESTART;
SIGNAL_UNLOCK ();
return return_value_altered;
}
}
- ihint.signal_id = node->signal_id;
- ihint.detail = detail;
accumulator = node->accumulator;
if (accumulator)
{
}
else
return_accu = emission_return;
- emission_push ((node->flags & G_SIGNAL_NO_RECURSE) ? &g_restart_emissions : &g_recursive_emissions,
- signal_id, detail, instance, &emission_state);
- class_closure = node->class_closure;
+ emission.instance = instance;
+ emission.ihint.signal_id = node->signal_id;
+ emission.ihint.detail = detail;
+ emission.ihint.run_type = 0;
+ emission.state = 0;
+ emission.chain_type = G_TYPE_NONE;
+ emission_push ((node->flags & G_SIGNAL_NO_RECURSE) ? &g_restart_emissions : &g_recursive_emissions, &emission);
+ class_closure = signal_lookup_closure (node, instance);
EMIT_RESTART:
if (handler_list)
handler_ref (handler_list);
- ihint.run_type = G_SIGNAL_RUN_FIRST;
+ emission.ihint.run_type = G_SIGNAL_RUN_FIRST;
if ((node->flags & G_SIGNAL_RUN_FIRST) && class_closure)
{
- emission_state = EMISSION_RUN;
-
+ emission.state = EMISSION_RUN;
+
+ emission.chain_type = G_TYPE_FROM_INSTANCE (instance);
SIGNAL_UNLOCK ();
g_closure_invoke (class_closure,
return_accu,
node->n_params + 1,
instance_and_params,
- &ihint);
- if (!accumulate (&ihint, emission_return, &accu, accumulator) &&
- emission_state == EMISSION_RUN)
- emission_state = EMISSION_STOP;
+ &emission.ihint);
+ if (!accumulate (&emission.ihint, emission_return, &accu, accumulator) &&
+ emission.state == EMISSION_RUN)
+ emission.state = EMISSION_STOP;
SIGNAL_LOCK ();
+ emission.chain_type = G_TYPE_NONE;
return_value_altered = TRUE;
- if (emission_state == EMISSION_STOP)
+ if (emission.state == EMISSION_STOP)
goto EMIT_CLEANUP;
- else if (emission_state == EMISSION_RESTART)
+ else if (emission.state == EMISSION_RESTART)
goto EMIT_RESTART;
}
gboolean need_destroy, was_in_call, may_recurse = TRUE;
GHook *hook;
- emission_state = EMISSION_HOOK;
+ emission.state = EMISSION_HOOK;
hook = g_hook_first_valid (node->emission_hooks, may_recurse);
while (hook)
{
if (!signal_hook->detail || signal_hook->detail == detail)
{
- GSignalEmissionHook hook_func = hook->func;
+ GSignalEmissionHook hook_func = (GSignalEmissionHook) hook->func;
was_in_call = G_HOOK_IN_CALL (hook);
hook->flags |= G_HOOK_FLAG_IN_CALL;
SIGNAL_UNLOCK ();
- need_destroy = !hook_func (&ihint, node->n_params + 1, instance_and_params, hook->data);
+ need_destroy = !hook_func (&emission.ihint, node->n_params + 1, instance_and_params, hook->data);
SIGNAL_LOCK ();
if (!was_in_call)
hook->flags &= ~G_HOOK_FLAG_IN_CALL;
hook = g_hook_next_valid (node->emission_hooks, hook, may_recurse);
}
- if (emission_state == EMISSION_RESTART)
+ if (emission.state == EMISSION_RESTART)
goto EMIT_RESTART;
}
{
Handler *handler = handler_list;
- emission_state = EMISSION_RUN;
+ emission.state = EMISSION_RUN;
handler_ref (handler);
do
{
return_accu,
node->n_params + 1,
instance_and_params,
- &ihint);
- if (!accumulate (&ihint, emission_return, &accu, accumulator) &&
- emission_state == EMISSION_RUN)
- emission_state = EMISSION_STOP;
+ &emission.ihint);
+ if (!accumulate (&emission.ihint, emission_return, &accu, accumulator) &&
+ emission.state == EMISSION_RUN)
+ emission.state = EMISSION_STOP;
SIGNAL_LOCK ();
return_value_altered = TRUE;
- tmp = emission_state == EMISSION_RUN ? handler->next : NULL;
+ tmp = emission.state == EMISSION_RUN ? handler->next : NULL;
}
else
tmp = handler->next;
}
while (handler);
- if (emission_state == EMISSION_STOP)
+ if (emission.state == EMISSION_STOP)
goto EMIT_CLEANUP;
- else if (emission_state == EMISSION_RESTART)
+ else if (emission.state == EMISSION_RESTART)
goto EMIT_RESTART;
}
- ihint.run_type = G_SIGNAL_RUN_LAST;
+ emission.ihint.run_type = G_SIGNAL_RUN_LAST;
if ((node->flags & G_SIGNAL_RUN_LAST) && class_closure)
{
- emission_state = EMISSION_RUN;
+ emission.state = EMISSION_RUN;
+ emission.chain_type = G_TYPE_FROM_INSTANCE (instance);
SIGNAL_UNLOCK ();
g_closure_invoke (class_closure,
return_accu,
node->n_params + 1,
instance_and_params,
- &ihint);
- if (!accumulate (&ihint, emission_return, &accu, accumulator) &&
- emission_state == EMISSION_RUN)
- emission_state = EMISSION_STOP;
+ &emission.ihint);
+ if (!accumulate (&emission.ihint, emission_return, &accu, accumulator) &&
+ emission.state == EMISSION_RUN)
+ emission.state = EMISSION_STOP;
SIGNAL_LOCK ();
+ emission.chain_type = G_TYPE_NONE;
return_value_altered = TRUE;
- if (emission_state == EMISSION_STOP)
+ if (emission.state == EMISSION_STOP)
goto EMIT_CLEANUP;
- else if (emission_state == EMISSION_RESTART)
+ else if (emission.state == EMISSION_RESTART)
goto EMIT_RESTART;
}
{
Handler *handler = handler_list;
- emission_state = EMISSION_RUN;
+ emission.state = EMISSION_RUN;
handler_ref (handler);
do
{
return_accu,
node->n_params + 1,
instance_and_params,
- &ihint);
- if (!accumulate (&ihint, emission_return, &accu, accumulator) &&
- emission_state == EMISSION_RUN)
- emission_state = EMISSION_STOP;
+ &emission.ihint);
+ if (!accumulate (&emission.ihint, emission_return, &accu, accumulator) &&
+ emission.state == EMISSION_RUN)
+ emission.state = EMISSION_STOP;
SIGNAL_LOCK ();
return_value_altered = TRUE;
- tmp = emission_state == EMISSION_RUN ? handler->next : NULL;
+ tmp = emission.state == EMISSION_RUN ? handler->next : NULL;
}
else
tmp = handler->next;
}
while (handler);
- if (emission_state == EMISSION_STOP)
+ if (emission.state == EMISSION_STOP)
goto EMIT_CLEANUP;
- else if (emission_state == EMISSION_RESTART)
+ else if (emission.state == EMISSION_RESTART)
goto EMIT_RESTART;
}
EMIT_CLEANUP:
- ihint.run_type = G_SIGNAL_RUN_CLEANUP;
+ emission.ihint.run_type = G_SIGNAL_RUN_CLEANUP;
if ((node->flags & G_SIGNAL_RUN_CLEANUP) && class_closure)
{
gboolean need_unset = FALSE;
- emission_state = EMISSION_STOP;
+ emission.state = EMISSION_STOP;
+ emission.chain_type = G_TYPE_FROM_INSTANCE (instance);
SIGNAL_UNLOCK ();
if (node->return_type != G_TYPE_NONE && !accumulator)
{
node->return_type != G_TYPE_NONE ? &accu : NULL,
node->n_params + 1,
instance_and_params,
- &ihint);
+ &emission.ihint);
if (need_unset)
g_value_unset (&accu);
SIGNAL_LOCK ();
+ emission.chain_type = G_TYPE_NONE;
- if (emission_state == EMISSION_RESTART)
+ if (emission.state == EMISSION_RESTART)
goto EMIT_RESTART;
}
if (handler_list)
handler_unref_R (signal_id, instance, handler_list);
- emission_pop ((node->flags & G_SIGNAL_NO_RECURSE) ? &g_restart_emissions : &g_recursive_emissions, &emission_state);
+ emission_pop ((node->flags & G_SIGNAL_NO_RECURSE) ? &g_restart_emissions : &g_recursive_emissions, &emission);
SIGNAL_UNLOCK ();
if (accumulator)
g_value_unset (&accu);
return return_value_altered;
}
+static const gchar*
+type_debug_name (GType type)
+{
+ if (type)
+ {
+ const char *name = g_type_name (type & ~G_SIGNAL_TYPE_STATIC_SCOPE);
+ return name ? name : "<unknown>";
+ }
+ else
+ return "<invalid>";
+}
+
+/**
+ * g_signal_accumulator_true_handled:
+ * @ihint: standard #GSignalAccumulator parameter
+ * @return_accu: standard #GSignalAccumulator parameter
+ * @handler_return: standard #GSignalAccumulator parameter
+ * @dummy: standard #GSignalAccumulator parameter
+ *
+ * A predefined #GSignalAccumulator for signals that return a
+ * boolean values. The behavior that this accumulator gives is
+ * that a return of %TRUE stops the signal emission: no further
+ * callbacks will be invoked, while a return of %FALSE allows
+ * the emission to coninue. The idea here is that a %TRUE return
+ * indicates that the callback <emphasis>handled</emphasis> the signal,
+ * and no further handling is needed.
+ *
+ * Since: 2.4
+ *
+ * Returns: standard #GSignalAccumulator result
+ */
+gboolean
+g_signal_accumulator_true_handled (GSignalInvocationHint *ihint,
+ GValue *return_accu,
+ const GValue *handler_return,
+ gpointer dummy)
+{
+ gboolean continue_emission;
+ gboolean signal_handled;
+
+ signal_handled = g_value_get_boolean (handler_return);
+ g_value_set_boolean (return_accu, signal_handled);
+ continue_emission = !signal_handled;
+
+ return continue_emission;
+}
/* --- compile standard marshallers --- */
-#include "gobject.h"
-#include "genums.h"
-#include "gmarshal.c"
+#include "gmarshal.c"
+
+#define __G_SIGNAL_C__
+#include "gobjectaliasdef.c"
projects / platform / upstream / glib.git / blobdiff