| /* GObject - GLib Type, Object, Parameter and Signal Library |
| * Copyright (C) 2000-2001 Red Hat, Inc. |
| * |
| * This library is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public |
| * License as published by the Free Software Foundation; either |
| * version 2 of the License, or (at your option) any later version. |
| * |
| * This library is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General |
| * Public License along with this library; if not, write to the |
| * Free Software Foundation, Inc., 59 Temple Place, Suite 330, |
| * Boston, MA 02111-1307, USA. |
| * |
| * this code is based on the original GtkSignal implementation |
| * for the Gtk+ library by Peter Mattis <petm@xcf.berkeley.edu> |
| */ |
| |
| /* |
| * MT safe |
| */ |
| |
| #include <config.h> |
| |
| #include "gobjectalias.h" |
| #include "gsignal.h" |
| #include "gbsearcharray.h" |
| #include "gvaluecollector.h" |
| #include "gvaluetypes.h" |
| #include "gboxed.h" |
| #include <string.h> |
| #include <signal.h> |
| |
| |
| /* pre allocation configurations |
| */ |
| #define MAX_STACK_VALUES (16) |
| #define HANDLER_PRE_ALLOC (48) |
| |
| #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; |
| #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; |
| typedef struct _Emission Emission; |
| typedef struct _Handler Handler; |
| typedef struct _HandlerList HandlerList; |
| typedef struct _HandlerMatch HandlerMatch; |
| typedef enum |
| { |
| EMISSION_STOP, |
| EMISSION_RUN, |
| EMISSION_HOOK, |
| EMISSION_RESTART |
| } EmissionState; |
| |
| |
| /* --- prototypes --- */ |
| static inline guint signal_id_lookup (GQuark quark, |
| GType itype); |
| static void signal_destroy_R (SignalNode *signal_node); |
| static inline HandlerList* handler_list_ensure (guint signal_id, |
| gpointer instance); |
| static inline HandlerList* handler_list_lookup (guint signal_id, |
| gpointer instance); |
| static inline Handler* handler_new (gboolean after); |
| static void handler_insert (guint signal_id, |
| gpointer instance, |
| Handler *handler); |
| static Handler* handler_lookup (gpointer instance, |
| gulong handler_id, |
| guint *signal_id_p); |
| static inline HandlerMatch* handler_match_prepend (HandlerMatch *list, |
| Handler *handler, |
| guint signal_id); |
| static inline HandlerMatch* handler_match_free1_R (HandlerMatch *node, |
| gpointer instance); |
| static HandlerMatch* handlers_find (gpointer instance, |
| GSignalMatchType mask, |
| guint signal_id, |
| GQuark detail, |
| GClosure *closure, |
| gpointer func, |
| gpointer data, |
| gboolean one_and_only); |
| static inline void handler_ref (Handler *handler); |
| 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, |
| Emission *emission); |
| static inline void emission_pop (Emission **emission_list_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, |
| GQuark detail, |
| gpointer instance, |
| GValue *return_value, |
| const GValue *instance_and_params); |
| static const gchar * type_debug_name (GType type); |
| |
| |
| /* --- structures --- */ |
| typedef struct |
| { |
| GSignalAccumulator func; |
| gpointer data; |
| } SignalAccumulator; |
| typedef struct |
| { |
| GHook hook; |
| GQuark detail; |
| } SignalHook; |
| #define SIGNAL_HOOK(hook) ((SignalHook*) (hook)) |
| |
| struct _SignalNode |
| { |
| /* permanent portion */ |
| guint signal_id; |
| GType itype; |
| 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 */ |
| 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 |
| { |
| GType itype; |
| GQuark quark; |
| guint signal_id; |
| }; |
| |
| struct _Emission |
| { |
| Emission *next; |
| gpointer instance; |
| GSignalInvocationHint ihint; |
| EmissionState state; |
| GType chain_type; |
| }; |
| |
| struct _HandlerList |
| { |
| guint signal_id; |
| Handler *handlers; |
| }; |
| 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 after : 1; |
| GClosure *closure; |
| }; |
| struct _HandlerMatch |
| { |
| Handler *handler; |
| HandlerMatch *next; |
| union { |
| guint signal_id; |
| gpointer dummy; |
| } d; |
| }; |
| |
| typedef struct |
| { |
| GType instance_type; /* 0 for default closure */ |
| GClosure *closure; |
| } ClassClosure; |
| |
| |
| /* --- variables --- */ |
| 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; |
| #ifndef DISABLE_MEM_POOLS |
| static GTrashStack *g_handler_ts = NULL; |
| #endif |
| static gulong g_handler_sequential_number = 1; |
| G_LOCK_DEFINE_STATIC (g_signal_mutex); |
| #define SIGNAL_LOCK() G_LOCK (g_signal_mutex) |
| #define SIGNAL_UNLOCK() G_UNLOCK (g_signal_mutex) |
| |
| |
| /* --- signal nodes --- */ |
| static guint g_n_signal_nodes = 0; |
| static SignalNode **g_signal_nodes = NULL; |
| |
| static inline SignalNode* |
| LOOKUP_SIGNAL_NODE (register guint signal_id) |
| { |
| if (signal_id < g_n_signal_nodes) |
| return g_signal_nodes[signal_id]; |
| else |
| return NULL; |
| } |
| |
| |
| /* --- functions --- */ |
| static inline guint |
| signal_id_lookup (GQuark quark, |
| GType itype) |
| { |
| GType *ifaces, type = itype; |
| SignalKey key; |
| guint n_ifaces; |
| |
| key.quark = quark; |
| |
| /* 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, &g_signal_key_bconfig, &key); |
| |
| if (signal_key) |
| return signal_key->signal_id; |
| |
| type = g_type_parent (type); |
| } |
| while (type); |
| |
| /* no luck, try interfaces it exports */ |
| ifaces = g_type_interfaces (itype, &n_ifaces); |
| while (n_ifaces--) |
| { |
| SignalKey *signal_key; |
| |
| key.itype = ifaces[n_ifaces]; |
| signal_key = g_bsearch_array_lookup (g_signal_key_bsa, &g_signal_key_bconfig, &key); |
| |
| if (signal_key) |
| { |
| g_free (ifaces); |
| return signal_key->signal_id; |
| } |
| } |
| g_free (ifaces); |
| |
| return 0; |
| } |
| |
| 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) |
| { |
| const HandlerList *hlist1 = node1, *hlist2 = node2; |
| |
| return G_BSEARCH_ARRAY_CMP (hlist1->signal_id, hlist2->signal_id); |
| } |
| |
| static inline HandlerList* |
| handler_list_ensure (guint signal_id, |
| gpointer instance) |
| { |
| GBSearchArray *hlbsa = g_hash_table_lookup (g_handler_list_bsa_ht, instance); |
| HandlerList key; |
| |
| key.signal_id = signal_id; |
| key.handlers = NULL; |
| if (!hlbsa) |
| { |
| 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); |
| } |
| 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* |
| handler_list_lookup (guint signal_id, |
| gpointer instance) |
| { |
| GBSearchArray *hlbsa = g_hash_table_lookup (g_handler_list_bsa_ht, instance); |
| HandlerList key; |
| |
| key.signal_id = signal_id; |
| |
| return hlbsa ? g_bsearch_array_lookup (hlbsa, &g_signal_hlbsa_bconfig, &key) : NULL; |
| } |
| |
| static Handler* |
| handler_lookup (gpointer instance, |
| gulong handler_id, |
| guint *signal_id_p) |
| { |
| GBSearchArray *hlbsa = g_hash_table_lookup (g_handler_list_bsa_ht, instance); |
| |
| if (hlbsa) |
| { |
| guint i; |
| |
| for (i = 0; i < hlbsa->n_nodes; i++) |
| { |
| HandlerList *hlist = g_bsearch_array_get_nth (hlbsa, &g_signal_hlbsa_bconfig, i); |
| Handler *handler; |
| |
| for (handler = hlist->handlers; handler; handler = handler->next) |
| if (handler->sequential_number == handler_id) |
| { |
| if (signal_id_p) |
| *signal_id_p = hlist->signal_id; |
| |
| return handler; |
| } |
| } |
| } |
| |
| return NULL; |
| } |
| |
| static inline HandlerMatch* |
| handler_match_prepend (HandlerMatch *list, |
| Handler *handler, |
| guint signal_id) |
| { |
| 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->handler = handler; |
| node->next = list; |
| node->d.signal_id = signal_id; |
| handler_ref (handler); |
| |
| return node; |
| } |
| static inline HandlerMatch* |
| handler_match_free1_R (HandlerMatch *node, |
| gpointer instance) |
| { |
| HandlerMatch *next = node->next; |
| |
| handler_unref_R (node->d.signal_id, instance, node->handler); |
| g_list_free_1 ((GList*) node); |
| |
| return next; |
| } |
| |
| static HandlerMatch* |
| handlers_find (gpointer instance, |
| GSignalMatchType mask, |
| guint signal_id, |
| GQuark detail, |
| GClosure *closure, |
| gpointer func, |
| gpointer data, |
| gboolean one_and_only) |
| { |
| HandlerMatch *mlist = NULL; |
| |
| if (mask & G_SIGNAL_MATCH_ID) |
| { |
| HandlerList *hlist = handler_list_lookup (signal_id, instance); |
| Handler *handler; |
| SignalNode *node = NULL; |
| |
| if (mask & G_SIGNAL_MATCH_FUNC) |
| { |
| node = LOOKUP_SIGNAL_NODE (signal_id); |
| if (!node || !node->c_marshaller) |
| return NULL; |
| } |
| |
| mask = ~mask; |
| for (handler = hlist ? hlist->handlers : NULL; handler; handler = handler->next) |
| if (handler->sequential_number && |
| ((mask & G_SIGNAL_MATCH_DETAIL) || handler->detail == detail) && |
| ((mask & G_SIGNAL_MATCH_CLOSURE) || handler->closure == closure) && |
| ((mask & G_SIGNAL_MATCH_DATA) || handler->closure->data == data) && |
| ((mask & G_SIGNAL_MATCH_UNBLOCKED) || handler->block_count == 0) && |
| ((mask & G_SIGNAL_MATCH_FUNC) || (handler->closure->marshal == node->c_marshaller && |
| handler->closure->meta_marshal == 0 && |
| ((GCClosure*) handler->closure)->callback == func))) |
| { |
| mlist = handler_match_prepend (mlist, handler, signal_id); |
| if (one_and_only) |
| return mlist; |
| } |
| } |
| else |
| { |
| GBSearchArray *hlbsa = g_hash_table_lookup (g_handler_list_bsa_ht, instance); |
| |
| mask = ~mask; |
| if (hlbsa) |
| { |
| guint i; |
| |
| for (i = 0; i < hlbsa->n_nodes; i++) |
| { |
| HandlerList *hlist = g_bsearch_array_get_nth (hlbsa, &g_signal_hlbsa_bconfig, i); |
| SignalNode *node = NULL; |
| Handler *handler; |
| |
| if (!(mask & G_SIGNAL_MATCH_FUNC)) |
| { |
| node = LOOKUP_SIGNAL_NODE (hlist->signal_id); |
| if (!node->c_marshaller) |
| continue; |
| } |
| |
| for (handler = hlist->handlers; handler; handler = handler->next) |
| if (handler->sequential_number && |
| ((mask & G_SIGNAL_MATCH_DETAIL) || handler->detail == detail) && |
| ((mask & G_SIGNAL_MATCH_CLOSURE) || handler->closure == closure) && |
| ((mask & G_SIGNAL_MATCH_DATA) || handler->closure->data == data) && |
| ((mask & G_SIGNAL_MATCH_UNBLOCKED) || handler->block_count == 0) && |
| ((mask & G_SIGNAL_MATCH_FUNC) || (handler->closure->marshal == node->c_marshaller && |
| handler->closure->meta_marshal == 0 && |
| ((GCClosure*) handler->closure)->callback == func))) |
| { |
| mlist = handler_match_prepend (mlist, handler, hlist->signal_id); |
| if (one_and_only) |
| return mlist; |
| } |
| } |
| } |
| } |
| |
| return mlist; |
| } |
| |
| static inline Handler* |
| handler_new (gboolean after) |
| { |
| Handler *handler = g_generic_node_alloc (&g_handler_ts, |
| sizeof (Handler), |
| HANDLER_PRE_ALLOC); |
| #ifndef G_DISABLE_CHECKS |
| if (g_handler_sequential_number < 1) |
| g_error (G_STRLOC ": handler id overflow, %s", REPORT_BUG); |
| #endif |
| |
| handler->sequential_number = g_handler_sequential_number++; |
| handler->prev = NULL; |
| handler->next = NULL; |
| handler->detail = 0; |
| handler->ref_count = 1; |
| handler->block_count = 0; |
| handler->after = after != FALSE; |
| handler->closure = NULL; |
| |
| return handler; |
| } |
| |
| static inline void |
| handler_ref (Handler *handler) |
| { |
| 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; |
| } |
| |
| static inline void |
| handler_unref_R (guint signal_id, |
| gpointer instance, |
| Handler *handler) |
| { |
| g_return_if_fail (handler->ref_count > 0); |
| |
| handler->ref_count -= 1; |
| if (!handler->ref_count) |
| { |
| if (handler->next) |
| handler->next->prev = handler->prev; |
| 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->handlers = handler->next; |
| } |
| SIGNAL_UNLOCK (); |
| g_closure_unref (handler->closure); |
| SIGNAL_LOCK (); |
| g_generic_node_free (&g_handler_ts, handler); |
| } |
| } |
| |
| static void |
| handler_insert (guint signal_id, |
| gpointer instance, |
| Handler *handler) |
| { |
| HandlerList *hlist; |
| |
| g_assert (handler->prev == NULL && handler->next == NULL); /* paranoid */ |
| |
| 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; |
| } |
| 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; |
| } |
| } |
| |
| static inline void |
| emission_push (Emission **emission_list_p, |
| Emission *emission) |
| { |
| emission->next = *emission_list_p; |
| *emission_list_p = emission; |
| } |
| |
| static inline void |
| emission_pop (Emission **emission_list_p, |
| Emission *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* |
| emission_find (Emission *emission_list, |
| guint signal_id, |
| GQuark detail, |
| gpointer instance) |
| { |
| Emission *emission; |
| |
| for (emission = emission_list; emission; emission = emission->next) |
| if (emission->instance == instance && |
| 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) |
| { |
| const SignalKey *key1 = node1, *key2 = node2; |
| |
| if (key1->itype == key2->itype) |
| return G_BSEARCH_ARRAY_CMP (key1->quark, key2->quark); |
| else |
| return G_BSEARCH_ARRAY_CMP (key1->itype, key2->itype); |
| } |
| |
| void |
| 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; |
| g_signal_nodes = g_renew (SignalNode*, g_signal_nodes, g_n_signal_nodes); |
| g_signal_nodes[0] = NULL; |
| } |
| SIGNAL_UNLOCK (); |
| } |
| |
| void |
| _g_signals_destroy (GType itype) |
| { |
| guint i; |
| |
| SIGNAL_LOCK (); |
| for (i = 1; i < g_n_signal_nodes; i++) |
| { |
| SignalNode *node = g_signal_nodes[i]; |
| |
| if (node->itype == itype) |
| { |
| if (node->destroyed) |
| g_warning (G_STRLOC ": signal \"%s\" of type `%s' already destroyed", |
| node->name, |
| type_debug_name (node->itype)); |
| else |
| signal_destroy_R (node); |
| } |
| } |
| SIGNAL_UNLOCK (); |
| } |
| |
| void |
| g_signal_stop_emission (gpointer instance, |
| guint signal_id, |
| GQuark detail) |
| { |
| SignalNode *node; |
| |
| g_return_if_fail (G_TYPE_CHECK_INSTANCE (instance)); |
| g_return_if_fail (signal_id > 0); |
| |
| SIGNAL_LOCK (); |
| node = LOOKUP_SIGNAL_NODE (signal_id); |
| if (node && detail && !(node->flags & G_SIGNAL_DETAILED)) |
| { |
| g_warning ("%s: signal id `%u' does not support detail (%u)", G_STRLOC, signal_id, detail); |
| SIGNAL_UNLOCK (); |
| return; |
| } |
| if (node && g_type_is_a (G_TYPE_FROM_INSTANCE (instance), node->itype)) |
| { |
| Emission *emission_list = node->flags & G_SIGNAL_NO_RECURSE ? g_restart_emissions : g_recursive_emissions; |
| Emission *emission = emission_find (emission_list, signal_id, detail, instance); |
| |
| if (emission) |
| { |
| 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 == EMISSION_RUN) |
| emission->state = EMISSION_STOP; |
| } |
| else |
| g_warning (G_STRLOC ": no emission of signal \"%s\" to stop for instance `%p'", |
| node->name, instance); |
| } |
| else |
| g_warning ("%s: signal id `%u' is invalid for instance `%p'", G_STRLOC, signal_id, instance); |
| SIGNAL_UNLOCK (); |
| } |
| |
| static void |
| signal_finalize_hook (GHookList *hook_list, |
| GHook *hook) |
| { |
| GDestroyNotify destroy = hook->destroy; |
| |
| if (destroy) |
| { |
| hook->destroy = NULL; |
| SIGNAL_UNLOCK (); |
| destroy (hook->data); |
| SIGNAL_LOCK (); |
| } |
| } |
| |
| gulong |
| g_signal_add_emission_hook (guint signal_id, |
| GQuark detail, |
| GSignalEmissionHook hook_func, |
| gpointer hook_data, |
| GDestroyNotify data_destroy) |
| { |
| static gulong seq_hook_id = 1; |
| SignalNode *node; |
| GHook *hook; |
| SignalHook *signal_hook; |
| |
| g_return_val_if_fail (signal_id > 0, 0); |
| g_return_val_if_fail (hook_func != NULL, 0); |
| |
| SIGNAL_LOCK (); |
| node = LOOKUP_SIGNAL_NODE (signal_id); |
| 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); |
| SIGNAL_UNLOCK (); |
| return 0; |
| } |
| if (!node->emission_hooks) |
| { |
| node->emission_hooks = g_new (GHookList, 1); |
| g_hook_list_init (node->emission_hooks, sizeof (SignalHook)); |
| node->emission_hooks->finalize_hook = signal_finalize_hook; |
| } |
| hook = g_hook_alloc (node->emission_hooks); |
| hook->data = hook_data; |
| hook->func = (gpointer) hook_func; |
| hook->destroy = data_destroy; |
| signal_hook = SIGNAL_HOOK (hook); |
| signal_hook->detail = detail; |
| node->emission_hooks->seq_id = seq_hook_id; |
| g_hook_append (node->emission_hooks, hook); |
| seq_hook_id = node->emission_hooks->seq_id; |
| SIGNAL_UNLOCK (); |
| |
| return hook->hook_id; |
| } |
| |
| void |
| g_signal_remove_emission_hook (guint signal_id, |
| gulong hook_id) |
| { |
| SignalNode *node; |
| |
| g_return_if_fail (signal_id > 0); |
| g_return_if_fail (hook_id > 0); |
| |
| SIGNAL_LOCK (); |
| node = LOOKUP_SIGNAL_NODE (signal_id); |
| if (!node || node->destroyed) |
| g_warning ("%s: invalid signal id `%u'", G_STRLOC, signal_id); |
| else if (!node->emission_hooks || !g_hook_destroy (node->emission_hooks, hook_id)) |
| g_warning ("%s: signal \"%s\" had no hook (%lu) to remove", G_STRLOC, node->name, hook_id); |
| SIGNAL_UNLOCK (); |
| } |
| |
| static inline guint |
| signal_parse_name (const gchar *name, |
| GType itype, |
| GQuark *detail_p, |
| gboolean force_quark) |
| { |
| const gchar *colon = strchr (name, ':'); |
| guint signal_id; |
| |
| if (!colon) |
| { |
| signal_id = signal_id_lookup (g_quark_try_string (name), itype); |
| if (signal_id && detail_p) |
| *detail_p = 0; |
| } |
| else if (colon[1] == ':') |
| { |
| gchar buffer[32]; |
| guint l = colon - name; |
| |
| if (l < 32) |
| { |
| memcpy (buffer, name, l); |
| buffer[l] = 0; |
| signal_id = signal_id_lookup (g_quark_try_string (buffer), itype); |
| } |
| else |
| { |
| gchar *signal = g_new (gchar, l + 1); |
| |
| memcpy (signal, name, l); |
| signal[l] = 0; |
| signal_id = signal_id_lookup (g_quark_try_string (signal), itype); |
| g_free (signal); |
| } |
| |
| if (signal_id && detail_p) |
| *detail_p = colon[2] ? (force_quark ? g_quark_from_string : g_quark_try_string) (colon + 2) : 0; |
| } |
| else |
| signal_id = 0; |
| return signal_id; |
| } |
| |
| gboolean |
| g_signal_parse_name (const gchar *detailed_signal, |
| GType itype, |
| guint *signal_id_p, |
| GQuark *detail_p, |
| gboolean force_detail_quark) |
| { |
| SignalNode *node; |
| GQuark detail = 0; |
| guint signal_id; |
| |
| g_return_val_if_fail (detailed_signal != NULL, FALSE); |
| g_return_val_if_fail (G_TYPE_IS_INSTANTIATABLE (itype) || G_TYPE_IS_INTERFACE (itype), FALSE); |
| |
| SIGNAL_LOCK (); |
| signal_id = signal_parse_name (detailed_signal, itype, &detail, force_detail_quark); |
| SIGNAL_UNLOCK (); |
| |
| node = signal_id ? LOOKUP_SIGNAL_NODE (signal_id) : NULL; |
| if (!node || node->destroyed || |
| (detail && !(node->flags & G_SIGNAL_DETAILED))) |
| return FALSE; |
| |
| if (signal_id_p) |
| *signal_id_p = signal_id; |
| if (detail_p) |
| *detail_p = detail; |
| |
| return TRUE; |
| } |
| |
| void |
| g_signal_stop_emission_by_name (gpointer instance, |
| const gchar *detailed_signal) |
| { |
| guint signal_id; |
| GQuark detail = 0; |
| GType itype; |
| |
| g_return_if_fail (G_TYPE_CHECK_INSTANCE (instance)); |
| g_return_if_fail (detailed_signal != NULL); |
| |
| SIGNAL_LOCK (); |
| itype = G_TYPE_FROM_INSTANCE (instance); |
| signal_id = signal_parse_name (detailed_signal, itype, &detail, TRUE); |
| if (signal_id) |
| { |
| SignalNode *node = LOOKUP_SIGNAL_NODE (signal_id); |
| |
| if (detail && !(node->flags & G_SIGNAL_DETAILED)) |
| g_warning ("%s: signal `%s' does not support details", G_STRLOC, detailed_signal); |
| else if (!g_type_is_a (itype, node->itype)) |
| g_warning ("%s: signal `%s' is invalid for instance `%p'", G_STRLOC, detailed_signal, instance); |
| else |
| { |
| Emission *emission_list = node->flags & G_SIGNAL_NO_RECURSE ? g_restart_emissions : g_recursive_emissions; |
| Emission *emission = emission_find (emission_list, signal_id, detail, instance); |
| |
| if (emission) |
| { |
| 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 == EMISSION_RUN) |
| emission->state = EMISSION_STOP; |
| } |
| else |
| g_warning (G_STRLOC ": no emission of signal \"%s\" to stop for instance `%p'", |
| node->name, instance); |
| } |
| } |
| else |
| g_warning ("%s: signal `%s' is invalid for instance `%p'", G_STRLOC, detailed_signal, instance); |
| SIGNAL_UNLOCK (); |
| } |
| |
| 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); |
| |
| SIGNAL_LOCK (); |
| signal_id = signal_id_lookup (g_quark_try_string (name), itype); |
| SIGNAL_UNLOCK (); |
| if (!signal_id) |
| { |
| /* give elaborate warnings */ |
| if (!g_type_name (itype)) |
| g_warning (G_STRLOC ": unable to lookup signal \"%s\" for invalid type id `%lu'", |
| name, itype); |
| else if (!G_TYPE_IS_INSTANTIATABLE (itype)) |
| g_warning (G_STRLOC ": unable to lookup signal \"%s\" for non instantiatable type `%s'", |
| name, g_type_name (itype)); |
| else if (!g_type_class_peek (itype)) |
| g_warning (G_STRLOC ": unable to lookup signal \"%s\" of unloaded type `%s'", |
| name, g_type_name (itype)); |
| } |
| |
| return signal_id; |
| } |
| |
| guint* |
| g_signal_list_ids (GType itype, |
| guint *n_ids) |
| { |
| SignalKey *keys; |
| GArray *result; |
| guint n_nodes; |
| guint i; |
| |
| g_return_val_if_fail (G_TYPE_IS_INSTANTIATABLE (itype) || G_TYPE_IS_INTERFACE (itype), NULL); |
| g_return_val_if_fail (n_ids != NULL, NULL); |
| |
| SIGNAL_LOCK (); |
| 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++) |
| if (keys[i].itype == itype) |
| { |
| const gchar *name = g_quark_to_string (keys[i].quark); |
| |
| /* Signal names with "_" in them are aliases to the same |
| * name with "-" instead of "_". |
| */ |
| if (!strchr (name, '_')) |
| g_array_append_val (result, keys[i].signal_id); |
| } |
| *n_ids = result->len; |
| SIGNAL_UNLOCK (); |
| if (!n_nodes) |
| { |
| /* give elaborate warnings */ |
| if (!g_type_name (itype)) |
| g_warning (G_STRLOC ": unable to list signals for invalid type id `%lu'", |
| itype); |
| else if (!G_TYPE_IS_INSTANTIATABLE (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)) |
| g_warning (G_STRLOC ": unable to list signals of unloaded type `%s'", |
| g_type_name (itype)); |
| } |
| |
| return (guint*) g_array_free (result, FALSE); |
| } |
| |
| G_CONST_RETURN gchar* |
| g_signal_name (guint signal_id) |
| { |
| SignalNode *node; |
| gchar *name; |
| |
| SIGNAL_LOCK (); |
| node = LOOKUP_SIGNAL_NODE (signal_id); |
| name = node ? node->name : NULL; |
| SIGNAL_UNLOCK (); |
| |
| return name; |
| } |
| |
| void |
| g_signal_query (guint signal_id, |
| GSignalQuery *query) |
| { |
| SignalNode *node; |
| |
| g_return_if_fail (query != NULL); |
| |
| SIGNAL_LOCK (); |
| node = LOOKUP_SIGNAL_NODE (signal_id); |
| if (!node || node->destroyed) |
| query->signal_id = 0; |
| else |
| { |
| query->signal_id = node->signal_id; |
| query->signal_name = node->name; |
| query->itype = node->itype; |
| query->signal_flags = node->flags; |
| query->return_type = node->return_type; |
| query->n_params = node->n_params; |
| query->param_types = node->param_types; |
| } |
| SIGNAL_UNLOCK (); |
| } |
| |
| guint |
| g_signal_new (const gchar *signal_name, |
| GType itype, |
| GSignalFlags signal_flags, |
| guint class_offset, |
| GSignalAccumulator accumulator, |
| gpointer accu_data, |
| GSignalCMarshaller c_marshaller, |
| GType return_type, |
| guint n_params, |
| ...) |
| { |
| va_list args; |
| guint signal_id; |
| |
| g_return_val_if_fail (signal_name != NULL, 0); |
| |
| va_start (args, n_params); |
| |
| signal_id = g_signal_new_valist (signal_name, itype, signal_flags, |
| class_offset ? g_signal_type_cclosure_new (itype, class_offset) : NULL, |
| accumulator, accu_data, c_marshaller, |
| 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); |
| } |
| |
| guint |
| g_signal_newv (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, |
| GType *param_types) |
| { |
| gchar *name; |
| guint signal_id, i; |
| SignalNode *node; |
| |
| g_return_val_if_fail (signal_name != NULL, 0); |
| g_return_val_if_fail (G_TYPE_IS_INSTANTIATABLE (itype) || G_TYPE_IS_INTERFACE (itype), 0); |
| if (n_params) |
| g_return_val_if_fail (param_types != NULL, 0); |
| g_return_val_if_fail ((return_type & G_SIGNAL_TYPE_STATIC_SCOPE) == 0, 0); |
| if (return_type == (G_TYPE_NONE & ~G_SIGNAL_TYPE_STATIC_SCOPE)) |
| g_return_val_if_fail (accumulator == NULL, 0); |
| if (!accumulator) |
| g_return_val_if_fail (accu_data == NULL, 0); |
| |
| name = g_strdup (signal_name); |
| g_strdelimit (name, G_STR_DELIMITERS ":^", '_'); /* FIXME do character checks like for types */ |
| |
| SIGNAL_LOCK (); |
| |
| signal_id = signal_id_lookup (g_quark_try_string (name), itype); |
| node = LOOKUP_SIGNAL_NODE (signal_id); |
| if (node && !node->destroyed) |
| { |
| g_warning (G_STRLOC ": signal \"%s\" already exists in the `%s' %s", |
| name, |
| type_debug_name (node->itype), |
| G_TYPE_IS_INTERFACE (node->itype) ? "interface" : "class ancestry"); |
| g_free (name); |
| SIGNAL_UNLOCK (); |
| return 0; |
| } |
| if (node && node->itype != itype) |
| { |
| g_warning (G_STRLOC ": signal \"%s\" for type `%s' was previously created for type `%s'", |
| name, |
| type_debug_name (itype), |
| type_debug_name (node->itype)); |
| g_free (name); |
| SIGNAL_UNLOCK (); |
| return 0; |
| } |
| for (i = 0; i < n_params; i++) |
| 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, 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", |
| type_debug_name (return_type), type_debug_name (itype), name); |
| g_free (name); |
| SIGNAL_UNLOCK (); |
| return 0; |
| } |
| if (return_type != G_TYPE_NONE && |
| (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", |
| type_debug_name (itype), name, type_debug_name (return_type)); |
| g_free (name); |
| SIGNAL_UNLOCK (); |
| return 0; |
| } |
| |
| /* setup permanent portion of signal node */ |
| if (!node) |
| { |
| SignalKey key; |
| |
| signal_id = g_n_signal_nodes++; |
| node = g_new (SignalNode, 1); |
| node->signal_id = signal_id; |
| g_signal_nodes = g_renew (SignalNode*, g_signal_nodes, g_n_signal_nodes); |
| g_signal_nodes[signal_id] = node; |
| node->itype = itype; |
| node->name = name; |
| key.itype = itype; |
| key.quark = g_quark_from_string (node->name); |
| key.signal_id = signal_id; |
| g_signal_key_bsa = g_bsearch_array_insert (g_signal_key_bsa, &g_signal_key_bconfig, &key); |
| g_strdelimit (node->name, "_", '-'); |
| key.quark = g_quark_from_static_string (node->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_bsa = NULL; |
| if (accumulator) |
| { |
| node->accumulator = g_new (SignalAccumulator, 1); |
| node->accumulator->func = accumulator; |
| node->accumulator->data = accu_data; |
| } |
| else |
| node->accumulator = NULL; |
| node->c_marshaller = c_marshaller; |
| node->emission_hooks = NULL; |
| 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 (); |
| |
| return 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; |
| } |
| |
| static void |
| 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_bsa = NULL; |
| signal_node->accumulator = NULL; |
| signal_node->c_marshaller = NULL; |
| signal_node->emission_hooks = NULL; |
| |
| #ifdef G_ENABLE_DEBUG |
| /* check current emissions */ |
| { |
| Emission *emission; |
| |
| for (emission = (node.flags & G_SIGNAL_NO_RECURSE) ? g_restart_emissions : g_recursive_emissions; |
| emission; emission = emission->next) |
| 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); |
| } |
| #endif |
| |
| /* free contents that need to |
| */ |
| SIGNAL_UNLOCK (); |
| g_free (node.param_types); |
| 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) |
| { |
| g_hook_list_clear (node.emission_hooks); |
| g_free (node.emission_hooks); |
| } |
| SIGNAL_LOCK (); |
| } |
| |
| 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 (); |
| } |
| |
| 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 (); |
| } |
| |
| 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; |
| } |
| |
| gulong |
| g_signal_connect_closure_by_id (gpointer instance, |
| guint signal_id, |
| GQuark detail, |
| GClosure *closure, |
| gboolean after) |
| { |
| SignalNode *node; |
| gulong handler_seq_no = 0; |
| |
| g_return_val_if_fail (G_TYPE_CHECK_INSTANCE (instance), 0); |
| g_return_val_if_fail (signal_id > 0, 0); |
| g_return_val_if_fail (closure != NULL, 0); |
| |
| SIGNAL_LOCK (); |
| node = LOOKUP_SIGNAL_NODE (signal_id); |
| if (node) |
| { |
| if (detail && !(node->flags & G_SIGNAL_DETAILED)) |
| g_warning ("%s: signal id `%u' does not support detail (%u)", G_STRLOC, signal_id, detail); |
| else if (!g_type_is_a (G_TYPE_FROM_INSTANCE (instance), node->itype)) |
| g_warning ("%s: signal id `%u' is invalid for instance `%p'", G_STRLOC, signal_id, instance); |
| else |
| { |
| Handler *handler = handler_new (after); |
| |
| handler_seq_no = handler->sequential_number; |
| handler->detail = detail; |
| handler->closure = g_closure_ref (closure); |
| g_closure_sink (closure); |
| handler_insert (signal_id, instance, handler); |
| if (node->c_marshaller && G_CLOSURE_NEEDS_MARSHAL (closure)) |
| g_closure_set_marshal (closure, node->c_marshaller); |
| } |
| } |
| else |
| g_warning ("%s: signal id `%u' is invalid for instance `%p'", G_STRLOC, signal_id, instance); |
| SIGNAL_UNLOCK (); |
| |
| return handler_seq_no; |
| } |
| |
| gulong |
| g_signal_connect_closure (gpointer instance, |
| const gchar *detailed_signal, |
| GClosure *closure, |
| gboolean after) |
| { |
| guint signal_id; |
| gulong handler_seq_no = 0; |
| GQuark detail = 0; |
| GType itype; |
| |
| g_return_val_if_fail (G_TYPE_CHECK_INSTANCE (instance), 0); |
| g_return_val_if_fail (detailed_signal != NULL, 0); |
| g_return_val_if_fail (closure != NULL, 0); |
| |
| SIGNAL_LOCK (); |
| itype = G_TYPE_FROM_INSTANCE (instance); |
| signal_id = signal_parse_name (detailed_signal, itype, &detail, TRUE); |
| if (signal_id) |
| { |
| SignalNode *node = LOOKUP_SIGNAL_NODE (signal_id); |
| |
| if (detail && !(node->flags & G_SIGNAL_DETAILED)) |
| g_warning ("%s: signal `%s' does not support details", G_STRLOC, detailed_signal); |
| else if (!g_type_is_a (itype, node->itype)) |
| g_warning ("%s: signal `%s' is invalid for instance `%p'", G_STRLOC, detailed_signal, instance); |
| else |
| { |
| Handler *handler = handler_new (after); |
| |
| handler_seq_no = handler->sequential_number; |
| handler->detail = detail; |
| handler->closure = g_closure_ref (closure); |
| g_closure_sink (closure); |
| handler_insert (signal_id, instance, handler); |
| if (node->c_marshaller && G_CLOSURE_NEEDS_MARSHAL (handler->closure)) |
| g_closure_set_marshal (handler->closure, node->c_marshaller); |
| } |
| } |
| else |
| g_warning ("%s: signal `%s' is invalid for instance `%p'", G_STRLOC, detailed_signal, instance); |
| SIGNAL_UNLOCK (); |
| |
| return handler_seq_no; |
| } |
| |
| gulong |
| g_signal_connect_data (gpointer instance, |
| const gchar *detailed_signal, |
| GCallback c_handler, |
| gpointer data, |
| GClosureNotify destroy_data, |
| GConnectFlags connect_flags) |
| { |
| guint signal_id; |
| gulong handler_seq_no = 0; |
| GQuark detail = 0; |
| GType itype; |
| gboolean swapped, after; |
| |
| g_return_val_if_fail (G_TYPE_CHECK_INSTANCE (instance), 0); |
| g_return_val_if_fail (detailed_signal != NULL, 0); |
| g_return_val_if_fail (c_handler != NULL, 0); |
| |
| swapped = (connect_flags & G_CONNECT_SWAPPED) != FALSE; |
| after = (connect_flags & G_CONNECT_AFTER) != FALSE; |
| |
| SIGNAL_LOCK (); |
| itype = G_TYPE_FROM_INSTANCE (instance); |
| signal_id = signal_parse_name (detailed_signal, itype, &detail, TRUE); |
| if (signal_id) |
| { |
| SignalNode *node = LOOKUP_SIGNAL_NODE (signal_id); |
| |
| if (detail && !(node->flags & G_SIGNAL_DETAILED)) |
| g_warning ("%s: signal `%s' does not support details", G_STRLOC, detailed_signal); |
| else if (!g_type_is_a (itype, node->itype)) |
| g_warning ("%s: signal `%s' is invalid for instance `%p'", G_STRLOC, detailed_signal, instance); |
| else |
| { |
| Handler *handler = handler_new (after); |
| |
| handler_seq_no = handler->sequential_number; |
| handler->detail = detail; |
| handler->closure = g_closure_ref ((swapped ? g_cclosure_new_swap : g_cclosure_new) (c_handler, data, destroy_data)); |
| g_closure_sink (handler->closure); |
| handler_insert (signal_id, instance, handler); |
| if (node->c_marshaller && G_CLOSURE_NEEDS_MARSHAL (handler->closure)) |
| g_closure_set_marshal (handler->closure, node->c_marshaller); |
| } |
| } |
| else |
| g_warning ("%s: signal `%s' is invalid for instance `%p'", G_STRLOC, detailed_signal, instance); |
| SIGNAL_UNLOCK (); |
| |
| return handler_seq_no; |
| } |
| |
| void |
| g_signal_handler_block (gpointer instance, |
| gulong handler_id) |
| { |
| Handler *handler; |
| |
| g_return_if_fail (G_TYPE_CHECK_INSTANCE (instance)); |
| g_return_if_fail (handler_id > 0); |
| |
| SIGNAL_LOCK (); |
| handler = handler_lookup (instance, handler_id, NULL); |
| if (handler) |
| { |
| #ifndef G_DISABLE_CHECKS |
| if (handler->block_count >= HANDLER_MAX_BLOCK_COUNT - 1) |
| g_error (G_STRLOC ": handler block_count overflow, %s", REPORT_BUG); |
| #endif |
| handler->block_count += 1; |
| } |
| else |
| g_warning ("%s: instance `%p' has no handler with id `%lu'", G_STRLOC, instance, handler_id); |
| SIGNAL_UNLOCK (); |
| } |
| |
| void |
| g_signal_handler_unblock (gpointer instance, |
| gulong handler_id) |
| { |
| Handler *handler; |
| |
| g_return_if_fail (G_TYPE_CHECK_INSTANCE (instance)); |
| g_return_if_fail (handler_id > 0); |
| |
| SIGNAL_LOCK (); |
| handler = handler_lookup (instance, handler_id, NULL); |
| if (handler) |
| { |
| if (handler->block_count) |
| handler->block_count -= 1; |
| else |
| g_warning (G_STRLOC ": handler `%lu' of instance `%p' is not blocked", handler_id, instance); |
| } |
| else |
| g_warning ("%s: instance `%p' has no handler with id `%lu'", G_STRLOC, instance, handler_id); |
| SIGNAL_UNLOCK (); |
| } |
| |
| void |
| g_signal_handler_disconnect (gpointer instance, |
| gulong handler_id) |
| { |
| Handler *handler; |
| guint signal_id; |
| |
| g_return_if_fail (G_TYPE_CHECK_INSTANCE (instance)); |
| g_return_if_fail (handler_id > 0); |
| |
| SIGNAL_LOCK (); |
| handler = handler_lookup (instance, handler_id, &signal_id); |
| if (handler) |
| { |
| handler->sequential_number = 0; |
| handler->block_count = 1; |
| handler_unref_R (signal_id, instance, handler); |
| } |
| else |
| g_warning ("%s: instance `%p' has no handler with id `%lu'", G_STRLOC, instance, handler_id); |
| SIGNAL_UNLOCK (); |
| } |
| |
| gboolean |
| g_signal_handler_is_connected (gpointer instance, |
| gulong handler_id) |
| { |
| Handler *handler; |
| gboolean connected; |
| |
| g_return_val_if_fail (G_TYPE_CHECK_INSTANCE (instance), FALSE); |
| |
| SIGNAL_LOCK (); |
| handler = handler_lookup (instance, handler_id, NULL); |
| connected = handler != NULL; |
| SIGNAL_UNLOCK (); |
| |
| return connected; |
| } |
| |
| void |
| g_signal_handlers_destroy (gpointer instance) |
| { |
| GBSearchArray *hlbsa; |
| |
| g_return_if_fail (G_TYPE_CHECK_INSTANCE (instance)); |
| |
| SIGNAL_LOCK (); |
| hlbsa = g_hash_table_lookup (g_handler_list_bsa_ht, instance); |
| if (hlbsa) |
| { |
| guint i; |
| |
| /* reentrancy caution, delete instance trace first */ |
| g_hash_table_remove (g_handler_list_bsa_ht, instance); |
| |
| for (i = 0; i < hlbsa->n_nodes; i++) |
| { |
| HandlerList *hlist = g_bsearch_array_get_nth (hlbsa, &g_signal_hlbsa_bconfig, i); |
| Handler *handler = hlist->handlers; |
| |
| while (handler) |
| { |
| Handler *tmp = handler; |
| |
| handler = tmp->next; |
| tmp->block_count = 1; |
| /* cruel unlink, this works because _all_ handlers vanish */ |
| tmp->next = NULL; |
| tmp->prev = tmp; |
| if (tmp->sequential_number) |
| { |
| tmp->sequential_number = 0; |
| handler_unref_R (0, NULL, tmp); |
| } |
| } |
| } |
| g_bsearch_array_free (hlbsa, &g_signal_hlbsa_bconfig); |
| } |
| SIGNAL_UNLOCK (); |
| } |
| |
| gulong |
| g_signal_handler_find (gpointer instance, |
| GSignalMatchType mask, |
| guint signal_id, |
| GQuark detail, |
| GClosure *closure, |
| gpointer func, |
| gpointer data) |
| { |
| gulong handler_seq_no = 0; |
| |
| 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_MASK) |
| { |
| HandlerMatch *mlist; |
| |
| SIGNAL_LOCK (); |
| mlist = handlers_find (instance, mask, signal_id, detail, closure, func, data, TRUE); |
| if (mlist) |
| { |
| handler_seq_no = mlist->handler->sequential_number; |
| handler_match_free1_R (mlist, instance); |
| } |
| SIGNAL_UNLOCK (); |
| } |
| |
| return handler_seq_no; |
| } |
| |
| static guint |
| signal_handlers_foreach_matched_R (gpointer instance, |
| GSignalMatchType mask, |
| guint signal_id, |
| GQuark detail, |
| GClosure *closure, |
| gpointer func, |
| gpointer data, |
| void (*callback) (gpointer instance, |
| gulong handler_seq_no)) |
| { |
| HandlerMatch *mlist; |
| guint n_handlers = 0; |
| |
| mlist = handlers_find (instance, mask, signal_id, detail, closure, func, data, FALSE); |
| while (mlist) |
| { |
| n_handlers++; |
| if (mlist->handler->sequential_number) |
| { |
| SIGNAL_UNLOCK (); |
| callback (instance, mlist->handler->sequential_number); |
| SIGNAL_LOCK (); |
| } |
| mlist = handler_match_free1_R (mlist, instance); |
| } |
| |
| return n_handlers; |
| } |
| |
| guint |
| g_signal_handlers_block_matched (gpointer instance, |
| GSignalMatchType mask, |
| guint signal_id, |
| GQuark detail, |
| GClosure *closure, |
| gpointer func, |
| gpointer data) |
| { |
| guint n_handlers = 0; |
| |
| 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)) |
| { |
| SIGNAL_LOCK (); |
| n_handlers = signal_handlers_foreach_matched_R (instance, mask, signal_id, detail, |
| closure, func, data, |
| g_signal_handler_block); |
| SIGNAL_UNLOCK (); |
| } |
| |
| return n_handlers; |
| } |
| |
| guint |
| g_signal_handlers_unblock_matched (gpointer instance, |
| GSignalMatchType mask, |
| guint signal_id, |
| GQuark detail, |
| GClosure *closure, |
| gpointer func, |
| gpointer data) |
| { |
| guint n_handlers = 0; |
| |
| 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)) |
| { |
| SIGNAL_LOCK (); |
| n_handlers = signal_handlers_foreach_matched_R (instance, mask, signal_id, detail, |
| closure, func, data, |
| g_signal_handler_unblock); |
| SIGNAL_UNLOCK (); |
| } |
| |
| return n_handlers; |
| } |
| |
| guint |
| g_signal_handlers_disconnect_matched (gpointer instance, |
| GSignalMatchType mask, |
| guint signal_id, |
| GQuark detail, |
| GClosure *closure, |
| gpointer func, |
| gpointer data) |
| { |
| guint n_handlers = 0; |
| |
| 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)) |
| { |
| SIGNAL_LOCK (); |
| n_handlers = signal_handlers_foreach_matched_R (instance, mask, signal_id, detail, |
| closure, func, data, |
| g_signal_handler_disconnect); |
| SIGNAL_UNLOCK (); |
| } |
| |
| return n_handlers; |
| } |
| |
| gboolean |
| g_signal_has_handler_pending (gpointer instance, |
| guint signal_id, |
| GQuark detail, |
| gboolean may_be_blocked) |
| { |
| HandlerMatch *mlist; |
| gboolean has_pending; |
| |
| g_return_val_if_fail (G_TYPE_CHECK_INSTANCE (instance), FALSE); |
| g_return_val_if_fail (signal_id > 0, FALSE); |
| |
| SIGNAL_LOCK (); |
| if (detail) |
| { |
| SignalNode *node = LOOKUP_SIGNAL_NODE (signal_id); |
| |
| if (!(node->flags & G_SIGNAL_DETAILED)) |
| { |
| g_warning ("%s: signal id `%u' does not support detail (%u)", G_STRLOC, signal_id, detail); |
| SIGNAL_UNLOCK (); |
| return FALSE; |
| } |
| } |
| mlist = handlers_find (instance, |
| (G_SIGNAL_MATCH_ID | G_SIGNAL_MATCH_DETAIL | (may_be_blocked ? 0 : G_SIGNAL_MATCH_UNBLOCKED)), |
| signal_id, detail, NULL, NULL, NULL, TRUE); |
| if (mlist) |
| { |
| has_pending = TRUE; |
| handler_match_free1_R (mlist, instance); |
| } |
| else |
| has_pending = FALSE; |
| SIGNAL_UNLOCK (); |
| |
| 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; |
| } |
| |
| 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 |
| guint i; |
| #endif |
| |
| 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)); |
| g_return_if_fail (signal_id > 0); |
| |
| param_values = instance_and_params + 1; |
| |
| SIGNAL_LOCK (); |
| node = LOOKUP_SIGNAL_NODE (signal_id); |
| if (!node || !g_type_is_a (G_TYPE_FROM_INSTANCE (instance), node->itype)) |
| { |
| g_warning ("%s: signal id `%u' is invalid for instance `%p'", G_STRLOC, signal_id, instance); |
| SIGNAL_UNLOCK (); |
| return; |
| } |
| #ifdef G_ENABLE_DEBUG |
| if (detail && !(node->flags & G_SIGNAL_DETAILED)) |
| { |
| g_warning ("%s: signal id `%u' does not support detail (%u)", G_STRLOC, signal_id, detail); |
| SIGNAL_UNLOCK (); |
| return; |
| } |
| for (i = 0; i < node->n_params; i++) |
| if (!G_TYPE_CHECK_VALUE_TYPE (param_values + i, node->param_types[i] & ~G_SIGNAL_TYPE_STATIC_SCOPE)) |
| { |
| g_critical ("%s: value for `%s' parameter %u for signal \"%s\" is of type `%s'", |
| G_STRLOC, |
| type_debug_name (node->param_types[i]), |
| i, |
| node->name, |
| G_VALUE_TYPE_NAME (param_values + i)); |
| SIGNAL_UNLOCK (); |
| return; |
| } |
| if (node->return_type != G_TYPE_NONE) |
| { |
| if (!return_value) |
| { |
| g_critical ("%s: return value `%s' for signal \"%s\" is (NULL)", |
| G_STRLOC, |
| type_debug_name (node->return_type), |
| node->name); |
| SIGNAL_UNLOCK (); |
| return; |
| } |
| else if (!node->accumulator && !G_TYPE_CHECK_VALUE_TYPE (return_value, node->return_type & ~G_SIGNAL_TYPE_STATIC_SCOPE)) |
| { |
| g_critical ("%s: return value `%s' for signal \"%s\" is of type `%s'", |
| G_STRLOC, |
| type_debug_name (node->return_type), |
| node->name, |
| G_VALUE_TYPE_NAME (return_value)); |
| SIGNAL_UNLOCK (); |
| return; |
| } |
| } |
| else |
| 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); |
| } |
| |
| void |
| g_signal_emit_valist (gpointer instance, |
| guint signal_id, |
| GQuark detail, |
| va_list var_args) |
| { |
| GValue *instance_and_params, stack_values[MAX_STACK_VALUES], *free_me = NULL; |
| GType signal_return_type; |
| GValue *param_values; |
| SignalNode *node; |
| guint i, n_params; |
| |
| g_return_if_fail (G_TYPE_CHECK_INSTANCE (instance)); |
| g_return_if_fail (signal_id > 0); |
| |
| SIGNAL_LOCK (); |
| node = LOOKUP_SIGNAL_NODE (signal_id); |
| if (!node || !g_type_is_a (G_TYPE_FROM_INSTANCE (instance), node->itype)) |
| { |
| g_warning ("%s: signal id `%u' is invalid for instance `%p'", G_STRLOC, signal_id, instance); |
| SIGNAL_UNLOCK (); |
| return; |
| } |
| #ifndef G_DISABLE_CHECKS |
| if (detail && !(node->flags & G_SIGNAL_DETAILED)) |
| { |
| g_warning ("%s: signal id `%u' does not support detail (%u)", G_STRLOC, signal_id, detail); |
| SIGNAL_UNLOCK (); |
| return; |
| } |
| #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) |
| instance_and_params = stack_values; |
| else |
| { |
| free_me = g_new (GValue, node->n_params + 1); |
| instance_and_params = free_me; |
| } |
| param_values = instance_and_params + 1; |
| for (i = 0; i < node->n_params; i++) |
| { |
| gchar *error; |
| GType ptype = node->param_types[i] & ~G_SIGNAL_TYPE_STATIC_SCOPE; |
| gboolean static_scope = node->param_types[i] & G_SIGNAL_TYPE_STATIC_SCOPE; |
| |
| param_values[i].g_type = 0; |
| SIGNAL_UNLOCK (); |
| g_value_init (param_values + i, ptype); |
| G_VALUE_COLLECT (param_values + i, |
| var_args, |
| static_scope ? G_VALUE_NOCOPY_CONTENTS : 0, |
| &error); |
| if (error) |
| { |
| g_warning ("%s: %s", G_STRLOC, error); |
| g_free (error); |
| |
| /* we purposely leak the value here, it might not be |
| * in a sane state if an error condition occoured |
| */ |
| while (i--) |
| g_value_unset (param_values + i); |
| |
| g_free (free_me); |
| return; |
| } |
| SIGNAL_LOCK (); |
| } |
| SIGNAL_UNLOCK (); |
| instance_and_params->g_type = 0; |
| g_value_init (instance_and_params, G_TYPE_FROM_INSTANCE (instance)); |
| g_value_set_instance (instance_and_params, instance); |
| if (signal_return_type == G_TYPE_NONE) |
| signal_emit_unlocked_R (node, detail, instance, NULL, instance_and_params); |
| else |
| { |
| GValue return_value = { 0, }; |
| gchar *error = NULL; |
| GType rtype = signal_return_type & ~G_SIGNAL_TYPE_STATIC_SCOPE; |
| gboolean static_scope = signal_return_type & G_SIGNAL_TYPE_STATIC_SCOPE; |
| |
| g_value_init (&return_value, rtype); |
| |
| signal_emit_unlocked_R (node, detail, instance, &return_value, instance_and_params); |
| |
| G_VALUE_LCOPY (&return_value, |
| var_args, |
| static_scope ? G_VALUE_NOCOPY_CONTENTS : 0, |
| &error); |
| if (!error) |
| g_value_unset (&return_value); |
| else |
| { |
| g_warning ("%s: %s", G_STRLOC, error); |
| g_free (error); |
| |
| /* we purposely leak the value here, it might not be |
| * in a sane state if an error condition occured |
| */ |
| } |
| } |
| for (i = 0; i < n_params; i++) |
| g_value_unset (param_values + i); |
| g_value_unset (instance_and_params); |
| if (free_me) |
| g_free (free_me); |
| } |
| |
| void |
| g_signal_emit (gpointer instance, |
| guint signal_id, |
| GQuark detail, |
| ...) |
| { |
| va_list var_args; |
| |
| va_start (var_args, detail); |
| g_signal_emit_valist (instance, signal_id, detail, var_args); |
| va_end (var_args); |
| } |
| |
| void |
| g_signal_emit_by_name (gpointer instance, |
| const gchar *detailed_signal, |
| ...) |
| { |
| GQuark detail = 0; |
| guint signal_id; |
| |
| g_return_if_fail (G_TYPE_CHECK_INSTANCE (instance)); |
| g_return_if_fail (detailed_signal != NULL); |
| |
| SIGNAL_LOCK (); |
| signal_id = signal_parse_name (detailed_signal, G_TYPE_FROM_INSTANCE (instance), &detail, TRUE); |
| SIGNAL_UNLOCK (); |
| |
| if (signal_id) |
| { |
| va_list var_args; |
| |
| va_start (var_args, detailed_signal); |
| g_signal_emit_valist (instance, signal_id, detail, var_args); |
| va_end (var_args); |
| } |
| else |
| g_warning ("%s: signal name `%s' is invalid for instance `%p'", G_STRLOC, detailed_signal, instance); |
| } |
| |
| static inline gboolean |
| accumulate (GSignalInvocationHint *ihint, |
| GValue *return_accu, |
| GValue *handler_return, |
| SignalAccumulator *accumulator) |
| { |
| gboolean continue_emission; |
| |
| if (!accumulator) |
| return TRUE; |
| |
| continue_emission = accumulator->func (ihint, return_accu, handler_return, accumulator->data); |
| g_value_reset (handler_return); |
| |
| return continue_emission; |
| } |
| |
| static gboolean |
| signal_emit_unlocked_R (SignalNode *node, |
| GQuark detail, |
| gpointer instance, |
| GValue *emission_return, |
| const GValue *instance_and_params) |
| { |
| SignalAccumulator *accumulator; |
| Emission emission; |
| GClosure *class_closure; |
| HandlerList *hlist; |
| Handler *handler_list = NULL; |
| GValue *return_accu, accu = { 0, }; |
| guint signal_id; |
| gulong max_sequential_handler_number; |
| gboolean return_value_altered = FALSE; |
| |
| #ifdef G_ENABLE_DEBUG |
| IF_DEBUG (SIGNALS, g_trace_instance_signals == instance || g_trap_instance_signals == instance) |
| { |
| g_message ("%s::%s(%u) emitted (instance=%p, signal-node=%p)", |
| g_type_name (G_TYPE_FROM_INSTANCE (instance)), |
| node->name, detail, |
| instance, node); |
| if (g_trap_instance_signals == instance) |
| G_BREAKPOINT (); |
| } |
| #endif /* G_ENABLE_DEBUG */ |
| |
| SIGNAL_LOCK (); |
| signal_id = node->signal_id; |
| if (node->flags & G_SIGNAL_NO_RECURSE) |
| { |
| Emission *node = emission_find (g_restart_emissions, signal_id, detail, instance); |
| |
| if (node) |
| { |
| node->state = EMISSION_RESTART; |
| SIGNAL_UNLOCK (); |
| return return_value_altered; |
| } |
| } |
| accumulator = node->accumulator; |
| if (accumulator) |
| { |
| SIGNAL_UNLOCK (); |
| g_value_init (&accu, node->return_type & ~G_SIGNAL_TYPE_STATIC_SCOPE); |
| return_accu = &accu; |
| SIGNAL_LOCK (); |
| } |
| else |
| return_accu = emission_return; |
| 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_unref_R (signal_id, instance, handler_list); |
| max_sequential_handler_number = g_handler_sequential_number; |
| hlist = handler_list_lookup (signal_id, instance); |
| handler_list = hlist ? hlist->handlers : NULL; |
| if (handler_list) |
| handler_ref (handler_list); |
| |
| emission.ihint.run_type = G_SIGNAL_RUN_FIRST; |
| |
| if ((node->flags & G_SIGNAL_RUN_FIRST) && class_closure) |
| { |
| 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, |
| &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) |
| goto EMIT_CLEANUP; |
| else if (emission.state == EMISSION_RESTART) |
| goto EMIT_RESTART; |
| } |
| |
| if (node->emission_hooks) |
| { |
| gboolean need_destroy, was_in_call, may_recurse = TRUE; |
| GHook *hook; |
| |
| emission.state = EMISSION_HOOK; |
| hook = g_hook_first_valid (node->emission_hooks, may_recurse); |
| while (hook) |
| { |
| SignalHook *signal_hook = SIGNAL_HOOK (hook); |
| |
| if (!signal_hook->detail || signal_hook->detail == detail) |
| { |
| 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 (&emission.ihint, node->n_params + 1, instance_and_params, hook->data); |
| SIGNAL_LOCK (); |
| if (!was_in_call) |
| hook->flags &= ~G_HOOK_FLAG_IN_CALL; |
| if (need_destroy) |
| g_hook_destroy_link (node->emission_hooks, hook); |
| } |
| hook = g_hook_next_valid (node->emission_hooks, hook, may_recurse); |
| } |
| |
| if (emission.state == EMISSION_RESTART) |
| goto EMIT_RESTART; |
| } |
| |
| if (handler_list) |
| { |
| Handler *handler = handler_list; |
| |
| emission.state = EMISSION_RUN; |
| handler_ref (handler); |
| do |
| { |
| Handler *tmp; |
| |
| if (handler->after) |
| { |
| handler_unref_R (signal_id, instance, handler_list); |
| handler_list = handler; |
| break; |
| } |
| else if (!handler->block_count && (!handler->detail || handler->detail == detail) && |
| handler->sequential_number < max_sequential_handler_number) |
| { |
| SIGNAL_UNLOCK (); |
| g_closure_invoke (handler->closure, |
| return_accu, |
| node->n_params + 1, |
| instance_and_params, |
| &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; |
| } |
| else |
| tmp = handler->next; |
| |
| if (tmp) |
| handler_ref (tmp); |
| handler_unref_R (signal_id, instance, handler_list); |
| handler_list = handler; |
| handler = tmp; |
| } |
| while (handler); |
| |
| if (emission.state == EMISSION_STOP) |
| goto EMIT_CLEANUP; |
| else if (emission.state == EMISSION_RESTART) |
| goto EMIT_RESTART; |
| } |
| |
| emission.ihint.run_type = G_SIGNAL_RUN_LAST; |
| |
| if ((node->flags & G_SIGNAL_RUN_LAST) && class_closure) |
| { |
| 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, |
| &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) |
| goto EMIT_CLEANUP; |
| else if (emission.state == EMISSION_RESTART) |
| goto EMIT_RESTART; |
| } |
| |
| if (handler_list) |
| { |
| Handler *handler = handler_list; |
| |
| emission.state = EMISSION_RUN; |
| handler_ref (handler); |
| do |
| { |
| Handler *tmp; |
| |
| if (handler->after && !handler->block_count && (!handler->detail || handler->detail == detail) && |
| handler->sequential_number < max_sequential_handler_number) |
| { |
| SIGNAL_UNLOCK (); |
| g_closure_invoke (handler->closure, |
| return_accu, |
| node->n_params + 1, |
| instance_and_params, |
| &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; |
| } |
| else |
| tmp = handler->next; |
| |
| if (tmp) |
| handler_ref (tmp); |
| handler_unref_R (signal_id, instance, handler); |
| handler = tmp; |
| } |
| while (handler); |
| |
| if (emission.state == EMISSION_STOP) |
| goto EMIT_CLEANUP; |
| else if (emission.state == EMISSION_RESTART) |
| goto EMIT_RESTART; |
| } |
| |
| EMIT_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.chain_type = G_TYPE_FROM_INSTANCE (instance); |
| SIGNAL_UNLOCK (); |
| if (node->return_type != G_TYPE_NONE && !accumulator) |
| { |
| g_value_init (&accu, node->return_type & ~G_SIGNAL_TYPE_STATIC_SCOPE); |
| need_unset = TRUE; |
| } |
| g_closure_invoke (class_closure, |
| node->return_type != G_TYPE_NONE ? &accu : NULL, |
| node->n_params + 1, |
| instance_and_params, |
| &emission.ihint); |
| if (need_unset) |
| g_value_unset (&accu); |
| SIGNAL_LOCK (); |
| emission.chain_type = G_TYPE_NONE; |
| |
| 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); |
| 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>"; |
| } |
| |
| 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" |