1 /* GObject - GLib Type, Object, Parameter and Signal Library
2 * Copyright (C) 2000-2001 Red Hat, Inc.
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2 of the License, or (at your option) any later version.
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Lesser General Public License for more details.
14 * You should have received a copy of the GNU Lesser General
15 * Public License along with this library; if not, write to the
16 * Free Software Foundation, Inc., 59 Temple Place, Suite 330,
17 * Boston, MA 02111-1307, USA.
19 * this code is based on the original GtkSignal implementation
20 * for the Gtk+ library by Peter Mattis <petm@xcf.berkeley.edu>
28 #include "gbsearcharray.h"
29 #include "gvaluecollector.h"
30 #include "gvaluetypes.h"
35 /* pre allocation configurations
37 #define MAX_STACK_VALUES (16)
38 #define BSA_PRE_ALLOC (20)
39 #define HANDLER_PRE_ALLOC (48)
40 #define EMISSION_PRE_ALLOC (16)
42 #define REPORT_BUG "please report occourance circumstances to gtk-devel-list@gnome.org"
44 #define IF_DEBUG(debug_type, cond) if ((_g_type_debug_flags & G_TYPE_DEBUG_ ## debug_type) || cond)
45 static volatile gpointer *g_trace_instance_signals = NULL;
46 static volatile gpointer *g_trap_instance_signals = NULL;
47 #endif /* G_ENABLE_DEBUG */
50 /* --- generic allocation --- */
51 /* we special case allocations generically by replacing
52 * these functions with more speed/memory aware variants
54 #ifndef DISABLE_MEM_POOLS
55 static inline gpointer
56 g_generic_node_alloc (GTrashStack **trash_stack_p,
58 guint nodes_pre_alloc)
60 gpointer node = g_trash_stack_pop (trash_stack_p);
66 nodes_pre_alloc = MAX (nodes_pre_alloc, 1);
67 block = g_malloc (sizeof_node * nodes_pre_alloc);
68 while (--nodes_pre_alloc)
70 g_trash_stack_push (trash_stack_p, block);
78 #define g_generic_node_free(trash_stack_p, node) g_trash_stack_push (trash_stack_p, node)
79 #else /* !DISABLE_MEM_POOLS */
80 #define g_generic_node_alloc(t,sizeof_node,p) g_malloc (sizeof_node)
81 #define g_generic_node_free(t,node) g_free (node)
82 #endif /* !DISABLE_MEM_POOLS */
85 /* --- typedefs --- */
86 typedef struct _SignalNode SignalNode;
87 typedef struct _SignalKey SignalKey;
88 typedef struct _Emission Emission;
89 typedef struct _Handler Handler;
90 typedef struct _HandlerList HandlerList;
91 typedef struct _HandlerMatch HandlerMatch;
101 /* --- prototypes --- */
102 static inline guint signal_id_lookup (GQuark quark,
104 static void signal_destroy_R (SignalNode *signal_node);
105 static inline HandlerList* handler_list_ensure (guint signal_id,
107 static inline HandlerList* handler_list_lookup (guint signal_id,
109 static inline Handler* handler_new (gboolean after);
110 static void handler_insert (guint signal_id,
113 static Handler* handler_lookup (gpointer instance,
116 static inline HandlerMatch* handler_match_prepend (HandlerMatch *list,
119 static inline HandlerMatch* handler_match_free1_R (HandlerMatch *node,
121 static HandlerMatch* handlers_find (gpointer instance,
122 GSignalMatchType mask,
128 gboolean one_and_only);
129 static inline void handler_ref (Handler *handler);
130 static inline void handler_unref_R (guint signal_id,
133 static inline void emission_push (Emission **emission_list_p,
137 EmissionState *state_p);
138 static inline void emission_pop (Emission **emission_list_p,
139 EmissionState *state_p);
140 static inline Emission* emission_find (Emission *emission_list,
144 static gboolean signal_emit_R (SignalNode *node,
147 GValue *return_value,
148 const GValue *instance_and_params);
151 /* --- structures --- */
154 GSignalAccumulator func;
162 #define SIGNAL_HOOK(hook) ((SignalHook*) (hook))
166 /* permanent portion */
172 /* reinitializable portion */
175 GType *param_types; /* mangled with G_SIGNAL_TYPE_STATIC_SCOPE flag */
176 GType return_type; /* mangled with G_SIGNAL_TYPE_STATIC_SCOPE flag */
177 GClosure *class_closure;
178 SignalAccumulator *accumulator;
179 GSignalCMarshaller c_marshaller;
180 GHookList *emission_hooks;
196 EmissionState *state_p;
210 guint ref_count : 16;
211 #define HANDLER_MAX_REF_COUNT (1 << 16)
212 guint block_count : 12;
213 #define HANDLER_MAX_BLOCK_COUNT (1 << 12)
228 /* --- variables --- */
229 static GBSearchArray g_signal_key_bsa = { NULL, 0, 0, 0, NULL };
230 static GHashTable *g_handler_list_bsa_ht = NULL;
231 static Emission *g_recursive_emissions = NULL;
232 static Emission *g_restart_emissions = NULL;
233 static GTrashStack *g_bsa_ts = NULL;
234 static GTrashStack *g_handler_ts = NULL;
235 static GTrashStack *g_emission_ts = NULL;
236 G_LOCK_DEFINE_STATIC (g_signal_mutex);
239 /* --- signal nodes --- */
240 static guint g_n_signal_nodes = 0;
241 static SignalNode **g_signal_nodes = NULL;
243 static inline SignalNode*
244 LOOKUP_SIGNAL_NODE (register guint signal_id)
246 if (signal_id < g_n_signal_nodes)
247 return g_signal_nodes[signal_id];
253 /* --- functions --- */
255 signal_id_lookup (GQuark quark,
258 GType *ifaces, type = itype;
264 /* try looking up signals for this type and its anchestors */
267 SignalKey *signal_key;
270 signal_key = g_bsearch_array_lookup (&g_signal_key_bsa, &key);
273 return signal_key->signal_id;
275 type = g_type_parent (type);
279 /* no luck, try interfaces it exports */
280 ifaces = g_type_interfaces (itype, &n_ifaces);
283 SignalKey *signal_key;
285 key.itype = ifaces[n_ifaces];
286 signal_key = g_bsearch_array_lookup (&g_signal_key_bsa, &key);
291 return signal_key->signal_id;
300 handler_lists_cmp (gconstpointer node1,
303 const HandlerList *hlist1 = node1, *hlist2 = node2;
305 return G_BSEARCH_ARRAY_CMP (hlist1->signal_id, hlist2->signal_id);
308 static inline HandlerList*
309 handler_list_ensure (guint signal_id,
312 GBSearchArray *hlbsa = g_hash_table_lookup (g_handler_list_bsa_ht, instance);
317 hlbsa = g_generic_node_alloc (&g_bsa_ts,
318 sizeof (GBSearchArray),
320 hlbsa->cmp_func = handler_lists_cmp;
321 hlbsa->sizeof_node = sizeof (HandlerList);
322 hlbsa->flags = G_BSEARCH_DEFER_SHRINK;
325 g_hash_table_insert (g_handler_list_bsa_ht, instance, hlbsa);
327 key.signal_id = signal_id;
330 return g_bsearch_array_insert (hlbsa, &key, FALSE);
333 static inline HandlerList*
334 handler_list_lookup (guint signal_id,
337 GBSearchArray *hlbsa = g_hash_table_lookup (g_handler_list_bsa_ht, instance);
340 key.signal_id = signal_id;
342 return hlbsa ? g_bsearch_array_lookup (hlbsa, &key) : NULL;
346 handler_lookup (gpointer instance,
350 GBSearchArray *hlbsa = g_hash_table_lookup (g_handler_list_bsa_ht, instance);
356 for (i = 0; i < hlbsa->n_nodes; i++)
358 HandlerList *hlist = g_bsearch_array_get_nth (hlbsa, i);
361 for (handler = hlist->handlers; handler; handler = handler->next)
362 if (handler->id == handler_id)
365 *signal_id_p = hlist->signal_id;
375 static inline HandlerMatch*
376 handler_match_prepend (HandlerMatch *list,
382 /* yeah, we could use our own memchunk here, introducing yet more
383 * rarely used cached nodes and extra allocation overhead.
384 * instead, we use GList* nodes, since they are exactly the size
385 * we need and are already cached. g_signal_init() asserts this.
387 node = (HandlerMatch*) g_list_alloc ();
388 node->handler = handler;
390 node->d.signal_id = signal_id;
391 handler_ref (handler);
395 static inline HandlerMatch*
396 handler_match_free1_R (HandlerMatch *node,
399 HandlerMatch *next = node->next;
401 handler_unref_R (node->d.signal_id, instance, node->handler);
402 g_list_free_1 ((GList*) node);
408 handlers_find (gpointer instance,
409 GSignalMatchType mask,
415 gboolean one_and_only)
417 HandlerMatch *mlist = NULL;
419 if (mask & G_SIGNAL_MATCH_ID)
421 HandlerList *hlist = handler_list_lookup (signal_id, instance);
423 SignalNode *node = NULL;
425 if (mask & G_SIGNAL_MATCH_FUNC)
427 node = LOOKUP_SIGNAL_NODE (signal_id);
428 if (!node || !node->c_marshaller)
433 for (handler = hlist ? hlist->handlers : NULL; handler; handler = handler->next)
435 ((mask & G_SIGNAL_MATCH_DETAIL) || handler->detail == detail) &&
436 ((mask & G_SIGNAL_MATCH_CLOSURE) || handler->closure == closure) &&
437 ((mask & G_SIGNAL_MATCH_DATA) || handler->closure->data == data) &&
438 ((mask & G_SIGNAL_MATCH_UNBLOCKED) || handler->block_count == 0) &&
439 ((mask & G_SIGNAL_MATCH_FUNC) || (handler->closure->marshal == node->c_marshaller &&
440 handler->closure->meta_marshal == 0 &&
441 ((GCClosure*) handler->closure)->callback == func)))
443 mlist = handler_match_prepend (mlist, handler, signal_id);
450 GBSearchArray *hlbsa = g_hash_table_lookup (g_handler_list_bsa_ht, instance);
457 for (i = 0; i < hlbsa->n_nodes; i++)
459 HandlerList *hlist = g_bsearch_array_get_nth (hlbsa, i);
460 SignalNode *node = NULL;
463 if (!(mask & G_SIGNAL_MATCH_FUNC))
465 node = LOOKUP_SIGNAL_NODE (hlist->signal_id);
466 if (!node->c_marshaller)
470 for (handler = hlist->handlers; handler; handler = handler->next)
472 ((mask & G_SIGNAL_MATCH_DETAIL) || handler->detail == detail) &&
473 ((mask & G_SIGNAL_MATCH_CLOSURE) || handler->closure == closure) &&
474 ((mask & G_SIGNAL_MATCH_DATA) || handler->closure->data == data) &&
475 ((mask & G_SIGNAL_MATCH_UNBLOCKED) || handler->block_count == 0) &&
476 ((mask & G_SIGNAL_MATCH_FUNC) || (handler->closure->marshal == node->c_marshaller &&
477 handler->closure->meta_marshal == 0 &&
478 ((GCClosure*) handler->closure)->callback == func)))
480 mlist = handler_match_prepend (mlist, handler, hlist->signal_id);
491 static inline Handler*
492 handler_new (gboolean after)
494 static guint handler_id = 1;
495 Handler *handler = g_generic_node_alloc (&g_handler_ts,
498 #ifndef G_DISABLE_CHECKS
500 g_error (G_STRLOC ": handler id overflow, %s", REPORT_BUG);
503 handler->id = handler_id++;
504 handler->prev = NULL;
505 handler->next = NULL;
507 handler->ref_count = 1;
508 handler->block_count = 0;
509 handler->after = after != FALSE;
510 handler->closure = NULL;
516 handler_ref (Handler *handler)
518 g_return_if_fail (handler->ref_count > 0);
520 #ifndef G_DISABLE_CHECKS
521 if (handler->ref_count >= HANDLER_MAX_REF_COUNT - 1)
522 g_error (G_STRLOC ": handler ref_count overflow, %s", REPORT_BUG);
525 handler->ref_count += 1;
529 handler_unref_R (guint signal_id,
533 g_return_if_fail (handler->ref_count > 0);
535 handler->ref_count -= 1;
536 if (!handler->ref_count)
539 handler->next->prev = handler->prev;
540 if (handler->prev) /* watch out for g_signal_handlers_destroy()! */
541 handler->prev->next = handler->next;
544 HandlerList *hlist = handler_list_lookup (signal_id, instance);
546 hlist->handlers = handler->next;
548 G_UNLOCK (g_signal_mutex);
549 g_closure_unref (handler->closure);
550 G_LOCK (g_signal_mutex);
551 g_generic_node_free (&g_handler_ts, handler);
556 handler_insert (guint signal_id,
562 g_assert (handler->prev == NULL && handler->next == NULL); /* paranoid */
564 hlist = handler_list_ensure (signal_id, instance);
565 if (!hlist->handlers)
566 hlist->handlers = handler;
567 else if (hlist->handlers->after && !handler->after)
569 handler->next = hlist->handlers;
570 hlist->handlers->prev = handler;
571 hlist->handlers = handler;
575 Handler *tmp = hlist->handlers;
581 while (tmp->next && !tmp->next->after)
584 tmp->next->prev = handler;
585 handler->next = tmp->next;
592 emission_push (Emission **emission_list_p,
596 EmissionState *state_p)
598 Emission *emission = g_generic_node_alloc (&g_emission_ts,
601 emission->next = *emission_list_p;
602 emission->signal_id = signal_id;
603 emission->detail = detail;
604 emission->instance = instance;
605 emission->state_p = state_p;
606 *emission_list_p = emission;
610 emission_pop (Emission **emission_list_p,
611 EmissionState *state_p)
613 Emission **loc = emission_list_p, *emission = *loc;
615 while (emission->state_p != state_p)
617 loc = &emission->next;
620 *loc = emission->next;
621 g_generic_node_free (&g_emission_ts, emission);
624 static inline Emission*
625 emission_find (Emission *emission_list,
632 for (emission = emission_list; emission; emission = emission->next)
633 if (emission->instance == instance &&
634 emission->signal_id == signal_id &&
635 emission->detail == detail)
641 signal_key_cmp (gconstpointer node1,
644 const SignalKey *key1 = node1, *key2 = node2;
646 if (key1->itype == key2->itype)
647 return G_BSEARCH_ARRAY_CMP (key1->quark, key2->quark);
649 return G_BSEARCH_ARRAY_CMP (key1->itype, key2->itype);
653 g_signal_init (void) /* sync with gtype.c */
655 G_LOCK (g_signal_mutex);
656 if (!g_n_signal_nodes)
658 /* handler_id_node_prepend() requires this */
659 g_assert (sizeof (GList) == sizeof (HandlerMatch));
661 /* setup signal key array */
662 g_signal_key_bsa.cmp_func = signal_key_cmp;
663 g_signal_key_bsa.sizeof_node = sizeof (SignalKey);
664 g_signal_key_bsa.flags = G_BSEARCH_ALIGN_POWER2; /* alloc-only */
666 /* setup handler list binary searchable array hash table (in german, that'd be one word ;) */
667 g_handler_list_bsa_ht = g_hash_table_new (g_direct_hash, NULL);
669 /* invalid (0) signal_id */
670 g_n_signal_nodes = 1;
671 g_signal_nodes = g_renew (SignalNode*, g_signal_nodes, g_n_signal_nodes);
672 g_signal_nodes[0] = NULL;
674 G_UNLOCK (g_signal_mutex);
678 _g_signals_destroy (GType itype)
682 G_LOCK (g_signal_mutex);
683 for (i = 1; i < g_n_signal_nodes; i++)
685 SignalNode *node = g_signal_nodes[i];
687 if (node->itype == itype)
690 g_warning (G_STRLOC ": signal \"%s\" of type `%s' already destroyed",
692 g_type_name (node->itype));
694 signal_destroy_R (node);
697 G_UNLOCK (g_signal_mutex);
701 g_signal_stop_emission (gpointer instance,
707 g_return_if_fail (G_TYPE_CHECK_INSTANCE (instance));
708 g_return_if_fail (signal_id > 0);
710 G_LOCK (g_signal_mutex);
711 node = LOOKUP_SIGNAL_NODE (signal_id);
712 if (node && detail && !(node->flags & G_SIGNAL_DETAILED))
714 g_warning ("%s: signal id `%u' does not support detail (%u)", G_STRLOC, signal_id, detail);
715 G_UNLOCK (g_signal_mutex);
718 if (node && g_type_is_a (G_TYPE_FROM_INSTANCE (instance), node->itype))
720 Emission *emission_list = node->flags & G_SIGNAL_NO_RECURSE ? g_restart_emissions : g_recursive_emissions;
721 Emission *emission = emission_find (emission_list, signal_id, detail, instance);
725 if (*emission->state_p == EMISSION_HOOK)
726 g_warning (G_STRLOC ": emission of signal \"%s\" for instance `%p' cannot be stopped from emission hook",
727 node->name, instance);
728 else if (*emission->state_p == EMISSION_RUN)
729 *emission->state_p = EMISSION_STOP;
732 g_warning (G_STRLOC ": no emission of signal \"%s\" to stop for instance `%p'",
733 node->name, instance);
736 g_warning ("%s: signal id `%u' is invalid for instance `%p'", G_STRLOC, signal_id, instance);
737 G_UNLOCK (g_signal_mutex);
741 signal_finalize_hook (GHookList *hook_list,
744 GDestroyNotify destroy = hook->destroy;
748 hook->destroy = NULL;
749 G_UNLOCK (g_signal_mutex);
750 destroy (hook->data);
751 G_LOCK (g_signal_mutex);
756 g_signal_add_emission_hook (guint signal_id,
758 GSignalEmissionHook hook_func,
760 GDestroyNotify data_destroy)
762 static guint seq_hook_id = 1;
765 SignalHook *signal_hook;
767 g_return_val_if_fail (signal_id > 0, 0);
768 g_return_val_if_fail (hook_func != NULL, 0);
770 G_LOCK (g_signal_mutex);
771 node = LOOKUP_SIGNAL_NODE (signal_id);
772 if (!node || node->destroyed || (node->flags & G_SIGNAL_NO_HOOKS))
774 g_warning ("%s: invalid signal id `%u'", G_STRLOC, signal_id);
775 G_UNLOCK (g_signal_mutex);
778 if (detail && !(node->flags & G_SIGNAL_DETAILED))
780 g_warning ("%s: signal id `%u' does not support detail (%u)", G_STRLOC, signal_id, detail);
781 G_UNLOCK (g_signal_mutex);
784 if (!node->emission_hooks)
786 node->emission_hooks = g_new (GHookList, 1);
787 g_hook_list_init (node->emission_hooks, sizeof (SignalHook));
788 node->emission_hooks->finalize_hook = signal_finalize_hook;
790 hook = g_hook_alloc (node->emission_hooks);
791 hook->data = hook_data;
792 hook->func = hook_func;
793 hook->destroy = data_destroy;
794 signal_hook = SIGNAL_HOOK (hook);
795 signal_hook->detail = detail;
796 node->emission_hooks->seq_id = seq_hook_id;
797 g_hook_append (node->emission_hooks, hook);
798 seq_hook_id = node->emission_hooks->seq_id;
799 G_UNLOCK (g_signal_mutex);
801 return hook->hook_id;
805 g_signal_remove_emission_hook (guint signal_id,
810 g_return_if_fail (signal_id > 0);
811 g_return_if_fail (hook_id > 0);
813 G_LOCK (g_signal_mutex);
814 node = LOOKUP_SIGNAL_NODE (signal_id);
815 if (!node || node->destroyed)
816 g_warning ("%s: invalid signal id `%u'", G_STRLOC, signal_id);
817 else if (!node->emission_hooks || !g_hook_destroy (node->emission_hooks, hook_id))
818 g_warning ("%s: signal \"%s\" had no hook (%u) to remove", G_STRLOC, node->name, hook_id);
819 G_UNLOCK (g_signal_mutex);
823 signal_parse_name (const gchar *name,
826 gboolean force_quark)
828 const gchar *colon = strchr (name, ':');
833 signal_id = signal_id_lookup (g_quark_try_string (name), itype);
834 if (signal_id && detail_p)
837 else if (colon[1] == ':')
840 guint l = colon - name;
844 memcpy (buffer, name, l);
846 signal_id = signal_id_lookup (g_quark_try_string (buffer), itype);
850 gchar *signal = g_new (gchar, l + 1);
852 memcpy (signal, name, l);
854 signal_id = signal_id_lookup (g_quark_try_string (signal), itype);
858 if (signal_id && detail_p)
859 *detail_p = colon[2] ? (force_quark ? g_quark_from_string : g_quark_try_string) (colon + 2) : 0;
867 g_signal_parse_name (const gchar *detailed_signal,
871 gboolean force_detail_quark)
877 g_return_val_if_fail (detailed_signal != NULL, FALSE);
878 g_return_val_if_fail (G_TYPE_IS_INSTANTIATABLE (itype) || G_TYPE_IS_INTERFACE (itype), FALSE);
880 G_LOCK (g_signal_mutex);
881 signal_id = signal_parse_name (detailed_signal, itype, &detail, force_detail_quark);
882 G_UNLOCK (g_signal_mutex);
884 node = signal_id ? LOOKUP_SIGNAL_NODE (signal_id) : NULL;
885 if (!node || node->destroyed ||
886 (detail && !(node->flags & G_SIGNAL_DETAILED)))
890 *signal_id_p = signal_id;
898 g_signal_lookup (const gchar *name,
903 g_return_val_if_fail (name != NULL, 0);
904 g_return_val_if_fail (G_TYPE_IS_INSTANTIATABLE (itype) || G_TYPE_IS_INTERFACE (itype), 0);
906 G_LOCK (g_signal_mutex);
907 signal_id = signal_id_lookup (g_quark_try_string (name), itype);
908 G_UNLOCK (g_signal_mutex);
913 G_CONST_RETURN gchar*
914 g_signal_name (guint signal_id)
919 G_LOCK (g_signal_mutex);
920 node = LOOKUP_SIGNAL_NODE (signal_id);
921 name = node ? node->name : NULL;
922 G_UNLOCK (g_signal_mutex);
928 g_signal_query (guint signal_id,
933 g_return_if_fail (query != NULL);
935 G_LOCK (g_signal_mutex);
936 node = LOOKUP_SIGNAL_NODE (signal_id);
937 if (!node || node->destroyed)
938 query->signal_id = 0;
941 query->signal_id = node->signal_id;
942 query->signal_name = node->name;
943 query->itype = node->itype;
944 query->signal_flags = node->flags;
945 query->return_type = node->return_type;
946 query->n_params = node->n_params;
947 query->param_types = node->param_types;
949 G_UNLOCK (g_signal_mutex);
953 g_signal_list_ids (GType itype,
961 g_return_val_if_fail (G_TYPE_IS_INSTANTIATABLE (itype) || G_TYPE_IS_INTERFACE (itype), NULL);
962 g_return_val_if_fail (n_ids != NULL, NULL);
964 G_LOCK (g_signal_mutex);
966 keys = g_signal_key_bsa.nodes;
967 n_nodes = g_signal_key_bsa.n_nodes;
968 result = g_array_new (FALSE, FALSE, sizeof (guint));
970 for (i = 0; i < n_nodes; i++)
971 if (keys[i].itype == itype)
973 const gchar *name = g_quark_to_string (keys[i].quark);
975 /* Signal names with "_" in them are aliases to the same
976 * name with "-" instead of "_".
978 if (!strchr (name, '_'))
979 g_array_append_val (result, keys[i].signal_id);
982 *n_ids = result->len;
984 G_UNLOCK (g_signal_mutex);
986 return (guint *) g_array_free (result, FALSE);
990 g_signal_new_valist (const gchar *signal_name,
992 GSignalFlags signal_flags,
993 GClosure *class_closure,
994 GSignalAccumulator accumulator,
996 GSignalCMarshaller c_marshaller,
1007 param_types = g_new (GType, n_params);
1009 for (i = 0; i < n_params; i++)
1010 param_types[i] = va_arg (args, GType);
1015 signal_id = g_signal_newv (signal_name, itype, signal_flags,
1016 class_closure, accumulator, accu_data, c_marshaller,
1017 return_type, n_params, param_types);
1018 g_free (param_types);
1024 g_signal_newc (const gchar *signal_name,
1026 GSignalFlags signal_flags,
1028 GSignalAccumulator accumulator,
1030 GSignalCMarshaller c_marshaller,
1038 g_return_val_if_fail (signal_name != NULL, 0);
1040 va_start (args, n_params);
1042 signal_id = g_signal_new_valist (signal_name, itype, signal_flags,
1043 class_offset ? g_signal_type_cclosure_new (itype, class_offset) : NULL,
1044 accumulator, accu_data, c_marshaller,
1045 return_type, n_params, args);
1053 g_signal_newv (const gchar *signal_name,
1055 GSignalFlags signal_flags,
1056 GClosure *class_closure,
1057 GSignalAccumulator accumulator,
1059 GSignalCMarshaller c_marshaller,
1068 g_return_val_if_fail (signal_name != NULL, 0);
1069 g_return_val_if_fail (G_TYPE_IS_INSTANTIATABLE (itype) || G_TYPE_IS_INTERFACE (itype), 0);
1071 g_return_val_if_fail (param_types != NULL, 0);
1072 g_return_val_if_fail ((return_type & G_SIGNAL_TYPE_STATIC_SCOPE) == 0, 0);
1073 if (return_type == (G_TYPE_NONE & ~G_SIGNAL_TYPE_STATIC_SCOPE))
1074 g_return_val_if_fail (accumulator == NULL, 0);
1076 g_return_val_if_fail (accu_data == NULL, 0);
1078 name = g_strdup (signal_name);
1079 g_strdelimit (name, G_STR_DELIMITERS ":^", '_'); // FIXME do character checks like for types
1081 G_LOCK (g_signal_mutex);
1083 signal_id = signal_id_lookup (g_quark_try_string (name), itype);
1084 node = LOOKUP_SIGNAL_NODE (signal_id);
1085 if (node && !node->destroyed)
1087 g_warning (G_STRLOC ": signal \"%s\" already exists in the `%s' %s",
1089 g_type_name (node->itype),
1090 G_TYPE_IS_INTERFACE (node->itype) ? "interface" : "class ancestry");
1092 G_UNLOCK (g_signal_mutex);
1095 if (node && node->itype != itype)
1097 g_warning (G_STRLOC ": signal \"%s\" for type `%s' was previously created for type `%s'",
1099 g_type_name (itype),
1100 g_type_name (node->itype));
1102 G_UNLOCK (g_signal_mutex);
1105 for (i = 0; i < n_params; i++)
1106 if (!G_TYPE_IS_VALUE (param_types[i] & ~G_SIGNAL_TYPE_STATIC_SCOPE))
1108 g_warning (G_STRLOC ": parameter %d of type `%s' for signal \"%s::%s\" is not a value type",
1109 i + 1, g_type_name (param_types[i] & ~G_SIGNAL_TYPE_STATIC_SCOPE), g_type_name (itype), name);
1111 G_UNLOCK (g_signal_mutex);
1114 if (return_type != G_TYPE_NONE && !G_TYPE_IS_VALUE (return_type & ~G_SIGNAL_TYPE_STATIC_SCOPE))
1116 g_warning (G_STRLOC ": return value of type `%s' for signal \"%s::%s\" is not a value type",
1117 g_type_name (return_type & ~G_SIGNAL_TYPE_STATIC_SCOPE), g_type_name (itype), name);
1119 G_UNLOCK (g_signal_mutex);
1123 /* setup permanent portion of signal node */
1128 signal_id = g_n_signal_nodes++;
1129 node = g_new (SignalNode, 1);
1130 node->signal_id = signal_id;
1131 g_signal_nodes = g_renew (SignalNode*, g_signal_nodes, g_n_signal_nodes);
1132 g_signal_nodes[signal_id] = node;
1133 node->itype = itype;
1136 key.quark = g_quark_from_string (node->name);
1137 key.signal_id = signal_id;
1138 g_bsearch_array_insert (&g_signal_key_bsa, &key, FALSE);
1139 g_strdelimit (node->name, "_", '-');
1140 key.quark = g_quark_from_static_string (node->name);
1141 g_bsearch_array_insert (&g_signal_key_bsa, &key, FALSE);
1143 node->destroyed = FALSE;
1145 /* setup reinitializable portion */
1146 node->flags = signal_flags & G_SIGNAL_FLAGS_MASK;
1147 node->n_params = n_params;
1148 node->param_types = g_memdup (param_types, sizeof (GType) * n_params);
1149 node->return_type = return_type;
1150 node->class_closure = class_closure ? g_closure_ref (class_closure) : NULL;
1152 g_closure_sink (class_closure);
1155 node->accumulator = g_new (SignalAccumulator, 1);
1156 node->accumulator->func = accumulator;
1157 node->accumulator->data = accu_data;
1160 node->accumulator = NULL;
1161 node->c_marshaller = c_marshaller;
1162 node->emission_hooks = NULL;
1163 if (node->c_marshaller && class_closure && G_CLOSURE_NEEDS_MARSHAL (class_closure))
1164 g_closure_set_marshal (class_closure, node->c_marshaller);
1165 G_UNLOCK (g_signal_mutex);
1170 signal_destroy_R (SignalNode *signal_node)
1172 SignalNode node = *signal_node;
1174 signal_node->destroyed = TRUE;
1176 /* reentrancy caution, zero out real contents first */
1177 signal_node->n_params = 0;
1178 signal_node->param_types = NULL;
1179 signal_node->return_type = 0;
1180 signal_node->class_closure = NULL;
1181 signal_node->accumulator = NULL;
1182 signal_node->c_marshaller = NULL;
1183 signal_node->emission_hooks = NULL;
1185 #ifdef G_ENABLE_DEBUG
1186 /* check current emissions */
1190 for (emission = (node.flags & G_SIGNAL_NO_RECURSE) ? g_restart_emissions : g_recursive_emissions;
1191 emission; emission = emission->next)
1192 if (emission->signal_id == node.signal_id)
1193 g_critical (G_STRLOC ": signal \"%s\" being destroyed is currently in emission (instance `%p')",
1194 node.name, emission->instance);
1198 /* free contents that need to
1200 G_UNLOCK (g_signal_mutex);
1201 g_free (node.param_types);
1202 g_closure_unref (node.class_closure);
1203 g_free (node.accumulator);
1204 if (node.emission_hooks)
1206 g_hook_list_clear (node.emission_hooks);
1207 g_free (node.emission_hooks);
1209 G_LOCK (g_signal_mutex);
1213 g_signal_connect_closure_by_id (gpointer instance,
1220 guint handler_id = 0;
1222 g_return_val_if_fail (G_TYPE_CHECK_INSTANCE (instance), 0);
1223 g_return_val_if_fail (signal_id > 0, 0);
1224 g_return_val_if_fail (closure != NULL, 0);
1226 G_LOCK (g_signal_mutex);
1227 node = LOOKUP_SIGNAL_NODE (signal_id);
1230 if (detail && !(node->flags & G_SIGNAL_DETAILED))
1231 g_warning ("%s: signal id `%u' does not support detail (%u)", G_STRLOC, signal_id, detail);
1232 else if (!g_type_is_a (G_TYPE_FROM_INSTANCE (instance), node->itype))
1233 g_warning ("%s: signal id `%u' is invalid for instance `%p'", G_STRLOC, signal_id, instance);
1236 Handler *handler = handler_new (after);
1238 handler_id = handler->id;
1239 handler->detail = detail;
1240 handler->closure = g_closure_ref (closure);
1241 g_closure_sink (closure);
1242 handler_insert (signal_id, instance, handler);
1243 if (node->c_marshaller && G_CLOSURE_NEEDS_MARSHAL (closure))
1244 g_closure_set_marshal (closure, node->c_marshaller);
1248 g_warning ("%s: signal id `%u' is invalid for instance `%p'", G_STRLOC, signal_id, instance);
1249 G_UNLOCK (g_signal_mutex);
1255 g_signal_connect_closure (gpointer instance,
1256 const gchar *detailed_signal,
1260 guint signal_id, handler_id = 0;
1264 g_return_val_if_fail (G_TYPE_CHECK_INSTANCE (instance), 0);
1265 g_return_val_if_fail (detailed_signal != NULL, 0);
1266 g_return_val_if_fail (closure != NULL, 0);
1268 G_LOCK (g_signal_mutex);
1269 itype = G_TYPE_FROM_INSTANCE (instance);
1270 signal_id = signal_parse_name (detailed_signal, itype, &detail, TRUE);
1273 SignalNode *node = LOOKUP_SIGNAL_NODE (signal_id);
1275 if (detail && !(node->flags & G_SIGNAL_DETAILED))
1276 g_warning ("%s: signal `%s' does not support details", G_STRLOC, detailed_signal);
1277 else if (!g_type_is_a (itype, node->itype))
1278 g_warning ("%s: signal `%s' is invalid for instance `%p'", G_STRLOC, detailed_signal, instance);
1281 Handler *handler = handler_new (after);
1283 handler_id = handler->id;
1284 handler->detail = detail;
1285 handler->closure = g_closure_ref (closure);
1286 g_closure_sink (closure);
1287 handler_insert (signal_id, instance, handler);
1288 if (node->c_marshaller && G_CLOSURE_NEEDS_MARSHAL (handler->closure))
1289 g_closure_set_marshal (handler->closure, node->c_marshaller);
1293 g_warning ("%s: signal `%s' is invalid for instance `%p'", G_STRLOC, detailed_signal, instance);
1294 G_UNLOCK (g_signal_mutex);
1300 g_signal_connect_data (gpointer instance,
1301 const gchar *detailed_signal,
1302 GCallback c_handler,
1304 GClosureNotify destroy_data,
1308 guint signal_id, handler_id = 0;
1312 g_return_val_if_fail (G_TYPE_CHECK_INSTANCE (instance), 0);
1313 g_return_val_if_fail (detailed_signal != NULL, 0);
1314 g_return_val_if_fail (c_handler != NULL, 0);
1316 G_LOCK (g_signal_mutex);
1317 itype = G_TYPE_FROM_INSTANCE (instance);
1318 signal_id = signal_parse_name (detailed_signal, itype, &detail, TRUE);
1321 SignalNode *node = LOOKUP_SIGNAL_NODE (signal_id);
1323 if (detail && !(node->flags & G_SIGNAL_DETAILED))
1324 g_warning ("%s: signal `%s' does not support details", G_STRLOC, detailed_signal);
1325 else if (!g_type_is_a (itype, node->itype))
1326 g_warning ("%s: signal `%s' is invalid for instance `%p'", G_STRLOC, detailed_signal, instance);
1329 Handler *handler = handler_new (after);
1331 handler_id = handler->id;
1332 handler->detail = detail;
1333 handler->closure = g_closure_ref ((swapped ? g_cclosure_new_swap : g_cclosure_new) (c_handler, data, destroy_data));
1334 g_closure_sink (handler->closure);
1335 handler_insert (signal_id, instance, handler);
1336 if (node->c_marshaller && G_CLOSURE_NEEDS_MARSHAL (handler->closure))
1337 g_closure_set_marshal (handler->closure, node->c_marshaller);
1341 g_warning ("%s: signal `%s' is invalid for instance `%p'", G_STRLOC, detailed_signal, instance);
1342 G_UNLOCK (g_signal_mutex);
1348 g_signal_handler_block (gpointer instance,
1353 g_return_if_fail (G_TYPE_CHECK_INSTANCE (instance));
1354 g_return_if_fail (handler_id > 0);
1356 G_LOCK (g_signal_mutex);
1357 handler = handler_lookup (instance, handler_id, NULL);
1360 #ifndef G_DISABLE_CHECKS
1361 if (handler->block_count >= HANDLER_MAX_BLOCK_COUNT - 1)
1362 g_error (G_STRLOC ": handler block_count overflow, %s", REPORT_BUG);
1365 handler->block_count += 1;
1368 g_warning ("%s: instance `%p' has no handler with id `%u'", G_STRLOC, instance, handler_id);
1369 G_UNLOCK (g_signal_mutex);
1373 g_signal_handler_unblock (gpointer instance,
1378 g_return_if_fail (G_TYPE_CHECK_INSTANCE (instance));
1379 g_return_if_fail (handler_id > 0);
1381 G_LOCK (g_signal_mutex);
1382 handler = handler_lookup (instance, handler_id, NULL);
1385 if (handler->block_count)
1386 handler->block_count -= 1;
1388 g_warning (G_STRLOC ": handler `%u' of instance `%p' is not blocked", handler_id, instance);
1391 g_warning ("%s: instance `%p' has no handler with id `%u'", G_STRLOC, instance, handler_id);
1392 G_UNLOCK (g_signal_mutex);
1396 g_signal_handler_disconnect (gpointer instance,
1402 g_return_if_fail (G_TYPE_CHECK_INSTANCE (instance));
1403 g_return_if_fail (handler_id > 0);
1405 G_LOCK (g_signal_mutex);
1406 handler = handler_lookup (instance, handler_id, &signal_id);
1410 handler->block_count = 1;
1411 handler_unref_R (signal_id, instance, handler);
1414 g_warning ("%s: instance `%p' has no handler with id `%u'", G_STRLOC, instance, handler_id);
1415 G_UNLOCK (g_signal_mutex);
1419 g_signal_handlers_destroy (gpointer instance)
1421 GBSearchArray *hlbsa;
1423 g_return_if_fail (G_TYPE_CHECK_INSTANCE (instance));
1425 G_LOCK (g_signal_mutex);
1426 hlbsa = g_hash_table_lookup (g_handler_list_bsa_ht, instance);
1431 /* reentrancy caution, delete instance trace first */
1432 g_hash_table_remove (g_handler_list_bsa_ht, instance);
1434 for (i = 0; i < hlbsa->n_nodes; i++)
1436 HandlerList *hlist = g_bsearch_array_get_nth (hlbsa, i);
1437 Handler *handler = hlist->handlers;
1441 Handler *tmp = handler;
1443 handler = tmp->next;
1444 tmp->block_count = 1;
1445 /* cruel unlink, this works because _all_ handlers vanish */
1451 handler_unref_R (0, NULL, tmp);
1455 g_free (hlbsa->nodes);
1456 g_generic_node_free (&g_bsa_ts, hlbsa);
1458 G_UNLOCK (g_signal_mutex);
1462 g_signal_handler_find (gpointer instance,
1463 GSignalMatchType mask,
1470 guint handler_id = 0;
1472 g_return_val_if_fail (G_TYPE_CHECK_INSTANCE (instance), 0);
1473 g_return_val_if_fail ((mask & ~G_SIGNAL_MATCH_MASK) == 0, 0);
1475 if (mask & G_SIGNAL_MATCH_MASK)
1477 HandlerMatch *mlist;
1479 G_LOCK (g_signal_mutex);
1480 mlist = handlers_find (instance, mask, signal_id, detail, closure, func, data, TRUE);
1483 handler_id = mlist->handler->id;
1484 handler_match_free1_R (mlist, instance);
1486 G_UNLOCK (g_signal_mutex);
1493 signal_handlers_foreach_matched_R (gpointer instance,
1494 GSignalMatchType mask,
1500 void (*callback) (gpointer instance,
1503 HandlerMatch *mlist;
1504 guint n_handlers = 0;
1506 mlist = handlers_find (instance, mask, signal_id, detail, closure, func, data, FALSE);
1510 G_UNLOCK (g_signal_mutex);
1511 callback (instance, mlist->handler->id);
1512 G_LOCK (g_signal_mutex);
1513 mlist = handler_match_free1_R (mlist, instance);
1520 g_signal_handlers_block_matched (gpointer instance,
1521 GSignalMatchType mask,
1528 guint n_handlers = 0;
1530 g_return_val_if_fail (G_TYPE_CHECK_INSTANCE (instance), FALSE);
1531 g_return_val_if_fail ((mask & ~G_SIGNAL_MATCH_MASK) == 0, FALSE);
1533 if (mask & (G_SIGNAL_MATCH_CLOSURE | G_SIGNAL_MATCH_FUNC | G_SIGNAL_MATCH_DATA))
1535 G_LOCK (g_signal_mutex);
1536 n_handlers = signal_handlers_foreach_matched_R (instance, mask, signal_id, detail,
1537 closure, func, data,
1538 g_signal_handler_block);
1539 G_UNLOCK (g_signal_mutex);
1546 g_signal_handlers_unblock_matched (gpointer instance,
1547 GSignalMatchType mask,
1554 guint n_handlers = 0;
1556 g_return_val_if_fail (G_TYPE_CHECK_INSTANCE (instance), FALSE);
1557 g_return_val_if_fail ((mask & ~G_SIGNAL_MATCH_MASK) == 0, FALSE);
1559 if (mask & (G_SIGNAL_MATCH_CLOSURE | G_SIGNAL_MATCH_FUNC | G_SIGNAL_MATCH_DATA))
1561 G_LOCK (g_signal_mutex);
1562 n_handlers = signal_handlers_foreach_matched_R (instance, mask, signal_id, detail,
1563 closure, func, data,
1564 g_signal_handler_unblock);
1565 G_UNLOCK (g_signal_mutex);
1572 g_signal_handlers_disconnect_matched (gpointer instance,
1573 GSignalMatchType mask,
1580 guint n_handlers = 0;
1582 g_return_val_if_fail (G_TYPE_CHECK_INSTANCE (instance), FALSE);
1583 g_return_val_if_fail ((mask & ~G_SIGNAL_MATCH_MASK) == 0, FALSE);
1585 if (mask & (G_SIGNAL_MATCH_CLOSURE | G_SIGNAL_MATCH_FUNC | G_SIGNAL_MATCH_DATA))
1587 G_LOCK (g_signal_mutex);
1588 n_handlers = signal_handlers_foreach_matched_R (instance, mask, signal_id, detail,
1589 closure, func, data,
1590 g_signal_handler_disconnect);
1591 G_UNLOCK (g_signal_mutex);
1598 g_signal_has_handler_pending (gpointer instance,
1601 gboolean may_be_blocked)
1603 HandlerMatch *mlist;
1604 gboolean has_pending;
1606 g_return_val_if_fail (G_TYPE_CHECK_INSTANCE (instance), FALSE);
1607 g_return_val_if_fail (signal_id > 0, FALSE);
1609 G_LOCK (g_signal_mutex);
1612 SignalNode *node = LOOKUP_SIGNAL_NODE (signal_id);
1614 if (!(node->flags & G_SIGNAL_DETAILED))
1616 g_warning ("%s: signal id `%u' does not support detail (%u)", G_STRLOC, signal_id, detail);
1617 G_UNLOCK (g_signal_mutex);
1621 mlist = handlers_find (instance,
1622 (G_SIGNAL_MATCH_ID | G_SIGNAL_MATCH_DETAIL | (may_be_blocked ? 0 : G_SIGNAL_MATCH_UNBLOCKED)),
1623 signal_id, detail, NULL, NULL, NULL, TRUE);
1627 handler_match_free1_R (mlist, instance);
1630 has_pending = FALSE;
1631 G_UNLOCK (g_signal_mutex);
1637 g_signal_emitv (const GValue *instance_and_params,
1640 GValue *return_value)
1642 const GValue *param_values;
1647 g_return_if_fail (instance_and_params != NULL);
1648 instance = g_value_peek_pointer (instance_and_params);
1649 g_return_if_fail (G_TYPE_CHECK_INSTANCE (instance));
1650 g_return_if_fail (signal_id > 0);
1652 param_values = instance_and_params + 1;
1654 G_LOCK (g_signal_mutex);
1655 node = LOOKUP_SIGNAL_NODE (signal_id);
1656 if (!node || !g_type_is_a (G_TYPE_FROM_INSTANCE (instance), node->itype))
1658 g_warning ("%s: signal id `%u' is invalid for instance `%p'", G_STRLOC, signal_id, instance);
1659 G_UNLOCK (g_signal_mutex);
1662 #ifdef G_ENABLE_DEBUG
1663 if (detail && !(node->flags & G_SIGNAL_DETAILED))
1665 g_warning ("%s: signal id `%u' does not support detail (%u)", G_STRLOC, signal_id, detail);
1666 G_UNLOCK (g_signal_mutex);
1669 for (i = 0; i < node->n_params; i++)
1670 if (!G_TYPE_CHECK_VALUE_TYPE (param_values + i, node->param_types[i] & ~G_SIGNAL_TYPE_STATIC_SCOPE))
1672 g_critical ("%s: value for `%s' parameter %u for signal \"%s\" is of type `%s'",
1674 g_type_name (node->param_types[i] & ~G_SIGNAL_TYPE_STATIC_SCOPE),
1677 G_VALUE_TYPE_NAME (param_values + i));
1678 G_UNLOCK (g_signal_mutex);
1681 if (node->return_type != G_TYPE_NONE)
1685 g_critical ("%s: return value `%s' for signal \"%s\" is (NULL)",
1687 g_type_name (node->return_type & ~G_SIGNAL_TYPE_STATIC_SCOPE),
1689 G_UNLOCK (g_signal_mutex);
1692 else if (!node->accumulator && !G_TYPE_CHECK_VALUE_TYPE (return_value, node->return_type & ~G_SIGNAL_TYPE_STATIC_SCOPE))
1694 g_critical ("%s: return value `%s' for signal \"%s\" is of type `%s'",
1696 g_type_name (node->return_type & ~G_SIGNAL_TYPE_STATIC_SCOPE),
1698 G_VALUE_TYPE_NAME (return_value));
1699 G_UNLOCK (g_signal_mutex);
1704 return_value = NULL;
1705 #endif /* G_ENABLE_DEBUG */
1707 signal_emit_R (node, detail, instance, return_value, instance_and_params);
1708 G_UNLOCK (g_signal_mutex);
1712 g_signal_emit_valist (gpointer instance,
1717 GValue *instance_and_params, stack_values[MAX_STACK_VALUES], *free_me = NULL;
1718 GValue *param_values;
1722 g_return_if_fail (G_TYPE_CHECK_INSTANCE (instance));
1723 g_return_if_fail (signal_id > 0);
1725 G_LOCK (g_signal_mutex);
1726 node = LOOKUP_SIGNAL_NODE (signal_id);
1727 if (!node || !g_type_is_a (G_TYPE_FROM_INSTANCE (instance), node->itype))
1729 g_warning ("%s: signal id `%u' is invalid for instance `%p'", G_STRLOC, signal_id, instance);
1730 G_UNLOCK (g_signal_mutex);
1733 #ifndef G_DISABLE_CHECKS
1734 if (detail && !(node->flags & G_SIGNAL_DETAILED))
1736 g_warning ("%s: signal id `%u' does not support detail (%u)", G_STRLOC, signal_id, detail);
1737 G_UNLOCK (g_signal_mutex);
1740 #endif /* !G_DISABLE_CHECKS */
1742 if (node->n_params < MAX_STACK_VALUES)
1743 instance_and_params = stack_values;
1746 free_me = g_new (GValue, node->n_params + 1);
1747 instance_and_params = free_me;
1749 param_values = instance_and_params + 1;
1750 for (i = 0; i < node->n_params; i++)
1754 param_values[i].g_type = 0;
1755 g_value_init (param_values + i, node->param_types[i] & ~G_SIGNAL_TYPE_STATIC_SCOPE);
1756 G_VALUE_COLLECT (param_values + i,
1758 node->param_types[i] & G_SIGNAL_TYPE_STATIC_SCOPE ? G_VALUE_NOCOPY_CONTENTS : 0,
1762 g_warning ("%s: %s", G_STRLOC, error);
1765 /* we purposely leak the value here, it might not be
1766 * in a sane state if an error condition occoured
1769 g_value_unset (param_values + i);
1771 G_UNLOCK (g_signal_mutex);
1776 instance_and_params->g_type = 0;
1777 g_value_init (instance_and_params, G_TYPE_FROM_INSTANCE (instance));
1778 g_value_set_instance (instance_and_params, instance);
1779 if (node->return_type == G_TYPE_NONE)
1780 signal_emit_R (node, detail, instance, NULL, instance_and_params);
1783 GValue return_value = { 0, };
1784 gchar *error = NULL;
1786 g_value_init (&return_value, node->return_type & ~G_SIGNAL_TYPE_STATIC_SCOPE);
1787 if (signal_emit_R (node, detail, instance, &return_value, instance_and_params))
1788 G_VALUE_LCOPY (&return_value,
1790 node->return_type & G_SIGNAL_TYPE_STATIC_SCOPE ? G_VALUE_NOCOPY_CONTENTS : 0,
1793 g_value_unset (&return_value);
1796 g_warning ("%s: %s", G_STRLOC, error);
1799 /* we purposely leak the value here, it might not be
1800 * in a sane state if an error condition occoured
1804 for (i = 0; i < node->n_params; i++)
1805 g_value_unset (param_values + i);
1806 g_value_unset (instance_and_params);
1809 G_UNLOCK (g_signal_mutex);
1813 g_signal_emit (gpointer instance,
1820 va_start (var_args, detail);
1821 g_signal_emit_valist (instance, signal_id, detail, var_args);
1826 g_signal_emit_by_name (gpointer instance,
1827 const gchar *detailed_signal,
1833 g_return_if_fail (G_TYPE_CHECK_INSTANCE (instance));
1834 g_return_if_fail (detailed_signal != NULL);
1836 G_LOCK (g_signal_mutex);
1837 signal_id = signal_parse_name (detailed_signal, G_TYPE_FROM_INSTANCE (instance), &detail, TRUE);
1838 G_UNLOCK (g_signal_mutex);
1844 va_start (var_args, detailed_signal);
1845 g_signal_emit_valist (instance, signal_id, detail, var_args);
1849 g_warning ("%s: signal name `%s' is invalid for instance `%p'", G_STRLOC, detailed_signal, instance);
1852 static inline gboolean
1853 accumulate (GSignalInvocationHint *ihint,
1854 GValue *return_accu,
1855 GValue *handler_return,
1856 SignalAccumulator *accumulator)
1858 gboolean continue_emission;
1863 continue_emission = accumulator->func (ihint, return_accu, handler_return, accumulator->data);
1864 g_value_reset (handler_return);
1866 return continue_emission;
1870 signal_emit_R (SignalNode *node,
1873 GValue *emission_return,
1874 const GValue *instance_and_params)
1876 EmissionState emission_state = 0;
1877 SignalAccumulator *accumulator;
1878 GSignalInvocationHint ihint;
1879 GClosure *class_closure;
1881 Handler *handler_list = NULL;
1882 GValue *return_accu, accu = { 0, };
1883 guint signal_id = node->signal_id;
1884 gboolean return_value_altered = FALSE;
1886 #ifdef G_ENABLE_DEBUG
1887 IF_DEBUG (SIGNALS, g_trace_instance_signals == instance || g_trap_instance_signals == instance)
1889 g_message ("%s::%s(%u) emitted (instance=%p, signal-node=%p)",
1890 g_type_name (G_TYPE_FROM_INSTANCE (instance)),
1893 if (g_trap_instance_signals == instance)
1896 #endif /* G_ENABLE_DEBUG */
1898 if (node->flags & G_SIGNAL_NO_RECURSE)
1900 Emission *emission = emission_find (g_restart_emissions, signal_id, detail, instance);
1904 *emission->state_p = EMISSION_RESTART;
1905 return return_value_altered;
1908 ihint.signal_id = node->signal_id;
1909 ihint.detail = detail;
1910 accumulator = node->accumulator;
1913 g_value_init (&accu, node->return_type & ~G_SIGNAL_TYPE_STATIC_SCOPE);
1914 return_accu = &accu;
1917 return_accu = emission_return;
1918 emission_push ((node->flags & G_SIGNAL_NO_RECURSE) ? &g_restart_emissions : &g_recursive_emissions,
1919 signal_id, detail, instance, &emission_state);
1920 class_closure = node->class_closure;
1925 handler_unref_R (signal_id, instance, handler_list);
1926 hlist = handler_list_lookup (signal_id, instance);
1927 handler_list = hlist ? hlist->handlers : NULL;
1929 handler_ref (handler_list);
1931 ihint.run_type = G_SIGNAL_RUN_FIRST;
1933 if ((node->flags & G_SIGNAL_RUN_FIRST) && class_closure)
1935 emission_state = EMISSION_RUN;
1937 G_UNLOCK (g_signal_mutex);
1938 g_closure_invoke (class_closure,
1941 instance_and_params,
1943 if (!accumulate (&ihint, emission_return, &accu, accumulator) &&
1944 emission_state == EMISSION_RUN)
1945 emission_state = EMISSION_STOP;
1946 G_LOCK (g_signal_mutex);
1947 return_value_altered = TRUE;
1949 if (emission_state == EMISSION_STOP)
1951 else if (emission_state == EMISSION_RESTART)
1955 if (node->emission_hooks)
1957 gboolean need_destroy, was_in_call, may_recurse = TRUE;
1960 emission_state = EMISSION_HOOK;
1961 hook = g_hook_first_valid (node->emission_hooks, may_recurse);
1964 SignalHook *signal_hook = SIGNAL_HOOK (hook);
1966 if (!signal_hook->detail || signal_hook->detail == detail)
1968 GSignalEmissionHook hook_func = hook->func;
1970 was_in_call = G_HOOK_IN_CALL (hook);
1971 hook->flags |= G_HOOK_FLAG_IN_CALL;
1972 G_UNLOCK (g_signal_mutex);
1973 need_destroy = !hook_func (&ihint, node->n_params + 1, instance_and_params, hook->data);
1974 G_LOCK (g_signal_mutex);
1976 hook->flags &= ~G_HOOK_FLAG_IN_CALL;
1978 g_hook_destroy_link (node->emission_hooks, hook);
1980 hook = g_hook_next_valid (node->emission_hooks, hook, may_recurse);
1983 if (emission_state == EMISSION_RESTART)
1989 Handler *handler = handler_list;
1991 emission_state = EMISSION_RUN;
1992 handler_ref (handler);
1999 handler_unref_R (signal_id, instance, handler_list);
2000 handler_list = handler;
2003 else if (!handler->block_count && (!handler->detail || handler->detail == detail))
2005 G_UNLOCK (g_signal_mutex);
2006 g_closure_invoke (handler->closure,
2009 instance_and_params,
2011 if (!accumulate (&ihint, emission_return, &accu, accumulator) &&
2012 emission_state == EMISSION_RUN)
2013 emission_state = EMISSION_STOP;
2014 G_LOCK (g_signal_mutex);
2015 return_value_altered = TRUE;
2017 tmp = emission_state == EMISSION_RUN ? handler->next : NULL;
2020 tmp = handler->next;
2024 handler_unref_R (signal_id, instance, handler_list);
2025 handler_list = handler;
2030 if (emission_state == EMISSION_STOP)
2032 else if (emission_state == EMISSION_RESTART)
2036 ihint.run_type = G_SIGNAL_RUN_LAST;
2038 if ((node->flags & G_SIGNAL_RUN_LAST) && class_closure)
2040 emission_state = EMISSION_RUN;
2042 G_UNLOCK (g_signal_mutex);
2043 g_closure_invoke (class_closure,
2046 instance_and_params,
2048 if (!accumulate (&ihint, emission_return, &accu, accumulator) &&
2049 emission_state == EMISSION_RUN)
2050 emission_state = EMISSION_STOP;
2051 G_LOCK (g_signal_mutex);
2052 return_value_altered = TRUE;
2054 if (emission_state == EMISSION_STOP)
2056 else if (emission_state == EMISSION_RESTART)
2062 Handler *handler = handler_list;
2064 emission_state = EMISSION_RUN;
2065 handler_ref (handler);
2070 if (handler->after && !handler->block_count && (!handler->detail || handler->detail == detail))
2072 G_UNLOCK (g_signal_mutex);
2073 g_closure_invoke (handler->closure,
2076 instance_and_params,
2078 if (!accumulate (&ihint, emission_return, &accu, accumulator) &&
2079 emission_state == EMISSION_RUN)
2080 emission_state = EMISSION_STOP;
2081 G_LOCK (g_signal_mutex);
2082 return_value_altered = TRUE;
2084 tmp = emission_state == EMISSION_RUN ? handler->next : NULL;
2087 tmp = handler->next;
2091 handler_unref_R (signal_id, instance, handler);
2096 if (emission_state == EMISSION_STOP)
2098 else if (emission_state == EMISSION_RESTART)
2104 ihint.run_type = G_SIGNAL_RUN_CLEANUP;
2106 if ((node->flags & G_SIGNAL_RUN_CLEANUP) && class_closure)
2108 gboolean need_unset = FALSE;
2110 emission_state = EMISSION_STOP;
2112 G_UNLOCK (g_signal_mutex);
2113 if (node->return_type != G_TYPE_NONE && !accumulator)
2115 g_value_init (&accu, node->return_type & ~G_SIGNAL_TYPE_STATIC_SCOPE);
2118 g_closure_invoke (class_closure,
2119 node->return_type != G_TYPE_NONE ? &accu : NULL,
2121 instance_and_params,
2124 g_value_unset (&accu);
2125 G_LOCK (g_signal_mutex);
2127 if (emission_state == EMISSION_RESTART)
2132 handler_unref_R (signal_id, instance, handler_list);
2134 emission_pop ((node->flags & G_SIGNAL_NO_RECURSE) ? &g_restart_emissions : &g_recursive_emissions, &emission_state);
2136 g_value_unset (&accu);
2138 return return_value_altered;
2142 /* --- compile standard marshallers --- */
2143 #include "gobject.h"
2145 #include "gmarshal.c"