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300e3bb247
Sun Oct 29 01:58:44 2000 Owen Taylor <otaylor@redhat.com> * gsignal.h: Add g_type_signals() - a function to list all signals for a given type.
1444 lines
39 KiB
C
1444 lines
39 KiB
C
/* GObject - GLib Type, Object, Parameter and Signal Library
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* Copyright (C) 2000 Red Hat, Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General
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* Public License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place, Suite 330,
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* Boston, MA 02111-1307, USA.
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*
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* this code is based on the original GtkSignal implementation
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* for the Gtk+ library by Peter Mattis <petm@xcf.berkeley.edu>
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*/
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#include "gsignal.h"
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#include "gbsearcharray.h"
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/* pre allocation configurations
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*/
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#define BSA_PRE_ALLOC (20)
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#define HANDLER_PRE_ALLOC (48)
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#define EMISSION_PRE_ALLOC (16)
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#define TIGHT_MEMORY (1)
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#define REPORT_BUG "please report occourance circumstances to gtk-devel-list@gnome.org"
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/* --- generic allocation --- */
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/* we can special case allocations generically by replacing
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* these functions with more speed/memory aware variants
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*/
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static inline gpointer
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g_generic_node_alloc (GTrashStack **trash_stack_p,
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guint sizeof_node,
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guint nodes_pre_alloc)
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{
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gpointer node = g_trash_stack_pop (trash_stack_p);
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if (!node)
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{
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guint8 *block;
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nodes_pre_alloc = MAX (nodes_pre_alloc, 1);
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block = g_malloc (sizeof_node * nodes_pre_alloc);
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while (--nodes_pre_alloc)
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{
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g_trash_stack_push (trash_stack_p, block);
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block += sizeof_node;
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}
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node = block;
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}
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return node;
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}
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static inline void
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g_generic_node_free (GTrashStack **trash_stack_p,
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gpointer node)
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{
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g_trash_stack_push (trash_stack_p, node);
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}
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/* --- typedefs --- */
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typedef struct _SignalNode SignalNode;
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typedef struct _SignalKey SignalKey;
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typedef struct _Emission Emission;
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typedef struct _Handler Handler;
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typedef struct _HandlerList HandlerList;
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typedef enum
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{
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EMISSION_STOP,
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EMISSION_RUN,
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EMISSION_HOOK,
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EMISSION_RESTART
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} EmissionState;
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/* --- prototypes --- */
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static inline guint signal_id_lookup (GQuark quark,
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GType itype);
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static void signal_destroy_R (SignalNode *signal_node);
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static inline HandlerList* handler_list_ensure (guint signal_id,
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gpointer instance);
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static inline HandlerList* handler_list_lookup (guint signal_id,
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gpointer instance);
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static inline Handler* handler_new (gboolean after);
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static void handler_insert (guint signal_id,
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gpointer instance,
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Handler *handler);
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static Handler* handler_lookup (gpointer instance,
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guint handler_id,
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guint *signal_id_p);
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static Handler* handler_find (gpointer instance,
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GSignalMatchType mask,
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guint signal_id,
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GQuark detail,
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GClosure *closure,
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gpointer func,
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gpointer data);
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static inline void handler_ref (Handler *handler);
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static inline void handler_unref_R (guint signal_id,
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gpointer instance,
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Handler *handler);
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static inline void emission_push (Emission **emission_list_p,
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guint signal_id,
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GQuark detail,
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gpointer instance,
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EmissionState *state_p);
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static inline void emission_pop (Emission **emission_list_p,
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EmissionState *state_p);
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static inline Emission* emission_find (Emission *emission_list,
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guint signal_id,
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GQuark detail,
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gpointer instance);
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static void signal_emit_R (SignalNode *node,
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GQuark detail,
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gpointer instance,
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GValue *return_value,
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const GValue *instance_and_params);
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/* --- structures --- */
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struct _SignalNode
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{
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/* permanent portion */
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guint signal_id;
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GType itype;
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gchar *name;
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guint destroyed : 1;
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/* reinitializable portion */
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guint flags : 8;
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guint n_params : 8;
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GType *param_types;
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GType return_type;
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GClosure *class_closure;
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GSignalAccumulator accumulator;
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GSignalCMarshaller c_marshaller;
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GHookList *emission_hooks;
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};
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struct _SignalKey
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{
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GType itype;
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GQuark quark;
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guint signal_id;
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};
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struct _Emission
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{
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Emission *next;
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guint signal_id;
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GQuark detail;
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gpointer instance;
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EmissionState *state_p;
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};
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struct _HandlerList
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{
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guint signal_id;
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Handler *handlers;
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};
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struct _Handler
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{
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guint id;
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Handler *next;
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Handler *prev;
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GQuark detail;
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guint ref_count : 16;
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#define HANDLER_MAX_REF_COUNT (1 << 16)
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guint block_count : 12;
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#define HANDLER_MAX_BLOCK_COUNT (1 << 12)
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guint after : 1;
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GClosure *closure;
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};
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/* --- variables --- */
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static GBSearchArray g_signal_key_bsa = { NULL, 0, 0, 0, NULL };
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static GHashTable *g_handler_list_bsa_ht = NULL;
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static Emission *g_recursive_emissions = NULL;
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static Emission *g_restart_emissions = NULL;
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static GTrashStack *g_bsa_ts = NULL;
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static GTrashStack *g_handler_ts = NULL;
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static GTrashStack *g_emission_ts = NULL;
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G_LOCK_DEFINE_STATIC (g_signal_mutex);
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/* --- signal nodes --- */
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static guint g_n_signal_nodes = 0;
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static SignalNode **g_signal_nodes = NULL;
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static inline SignalNode*
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LOOKUP_SIGNAL_NODE (register guint signal_id)
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{
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if (signal_id < g_n_signal_nodes)
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return g_signal_nodes[signal_id];
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else
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return NULL;
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}
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/* --- functions --- */
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static inline guint
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signal_id_lookup (GQuark quark,
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GType itype)
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{
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do
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{
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SignalKey key, *signal_key;
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key.itype = itype;
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key.quark = quark;
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signal_key = g_bsearch_array_lookup (&g_signal_key_bsa, &key);
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if (signal_key)
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return signal_key->signal_id;
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itype = g_type_parent (itype);
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}
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while (itype);
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return 0;
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}
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static gint
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handler_lists_cmp (gconstpointer node1,
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gconstpointer node2)
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{
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const HandlerList *hlist1 = node1, *hlist2 = node2;
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return G_BSEARCH_ARRAY_CMP (hlist1->signal_id, hlist2->signal_id);
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}
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static inline HandlerList*
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handler_list_ensure (guint signal_id,
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gpointer instance)
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{
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GBSearchArray *hlbsa = g_hash_table_lookup (g_handler_list_bsa_ht, instance);
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HandlerList key;
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if (!hlbsa)
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{
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hlbsa = g_generic_node_alloc (&g_bsa_ts,
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sizeof (GBSearchArray),
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BSA_PRE_ALLOC);
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hlbsa->cmp_func = handler_lists_cmp;
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hlbsa->sizeof_node = sizeof (HandlerList);
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hlbsa->flags = G_BSEARCH_DEFER_SHRINK;
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hlbsa->n_nodes = 0;
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hlbsa->nodes = NULL;
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g_hash_table_insert (g_handler_list_bsa_ht, instance, hlbsa);
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}
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key.signal_id = signal_id;
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key.handlers = NULL;
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return g_bsearch_array_insert (hlbsa, &key, FALSE);
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}
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static inline HandlerList*
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handler_list_lookup (guint signal_id,
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gpointer instance)
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{
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GBSearchArray *hlbsa = g_hash_table_lookup (g_handler_list_bsa_ht, instance);
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HandlerList key;
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key.signal_id = signal_id;
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return hlbsa ? g_bsearch_array_lookup (hlbsa, &key) : NULL;
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}
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static Handler*
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handler_lookup (gpointer instance,
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guint handler_id,
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guint *signal_id_p)
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{
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GBSearchArray *hlbsa = g_hash_table_lookup (g_handler_list_bsa_ht, instance);
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if (hlbsa)
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{
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guint i;
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for (i = 0; i < hlbsa->n_nodes; i++)
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{
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HandlerList *hlist = g_bsearch_array_get_nth (hlbsa, i);
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Handler *handler;
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for (handler = hlist->handlers; handler; handler = handler->next)
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if (handler->id == handler_id)
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{
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if (signal_id_p)
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*signal_id_p = hlist->signal_id;
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return handler;
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}
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}
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}
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return NULL;
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}
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static Handler*
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handler_find (gpointer instance,
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GSignalMatchType mask,
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guint signal_id,
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GQuark detail,
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GClosure *closure,
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gpointer func,
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gpointer data)
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{
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if (mask & G_SIGNAL_MATCH_ID)
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{
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HandlerList *hlist = handler_list_lookup (signal_id, instance);
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Handler *handler;
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SignalNode *node;
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if (mask & G_SIGNAL_MATCH_FUNC)
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{
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node = LOOKUP_SIGNAL_NODE (signal_id);
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if (!node || !node->c_marshaller)
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return NULL;
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}
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mask = ~mask;
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for (handler = hlist ? hlist->handlers : NULL; handler; handler = handler->next)
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if (((mask & G_SIGNAL_MATCH_DETAIL) || handler->detail == detail) &&
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((mask & G_SIGNAL_MATCH_CLOSURE) || handler->closure == closure) &&
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((mask & G_SIGNAL_MATCH_DATA) || handler->closure->data == data) &&
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((mask & G_SIGNAL_MATCH_UNBLOCKED) || handler->block_count == 0) &&
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((mask & G_SIGNAL_MATCH_FUNC) || (handler->closure->marshal == node->c_marshaller &&
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handler->closure->meta_marshal == 0 &&
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((GCClosure*) handler->closure)->callback == func)))
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return handler;
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}
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else
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{
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GBSearchArray *hlbsa = g_hash_table_lookup (g_handler_list_bsa_ht, instance);
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mask = ~mask;
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if (hlbsa)
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{
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guint i;
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for (i = 0; i < hlbsa->n_nodes; i++)
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{
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HandlerList *hlist = g_bsearch_array_get_nth (hlbsa, i);
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SignalNode *node;
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Handler *handler;
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if (!(mask & G_SIGNAL_MATCH_FUNC))
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{
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node = LOOKUP_SIGNAL_NODE (hlist->signal_id);
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if (!node->c_marshaller)
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continue;
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}
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for (handler = hlist->handlers; handler; handler = handler->next)
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if (((mask & G_SIGNAL_MATCH_DETAIL) || handler->detail == detail) &&
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((mask & G_SIGNAL_MATCH_CLOSURE) || handler->closure == closure) &&
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((mask & G_SIGNAL_MATCH_DATA) || handler->closure->data == data) &&
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((mask & G_SIGNAL_MATCH_UNBLOCKED) || handler->block_count == 0) &&
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((mask & G_SIGNAL_MATCH_FUNC) || (handler->closure->marshal == node->c_marshaller &&
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handler->closure->meta_marshal == 0 &&
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((GCClosure*) handler->closure)->callback == func)))
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return handler;
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}
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}
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}
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return NULL;
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}
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static inline Handler*
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handler_new (gboolean after)
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{
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static guint handler_id = 1;
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Handler *handler = g_generic_node_alloc (&g_handler_ts,
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sizeof (Handler),
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HANDLER_PRE_ALLOC);
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#ifndef G_DISABLE_CHECKS
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if (handler_id == 0)
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g_error (G_STRLOC ": handler id overflow, %s", REPORT_BUG);
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#endif
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handler->id = handler_id++;
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handler->prev = NULL;
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handler->next = NULL;
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handler->detail = 0;
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handler->ref_count = 1;
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handler->block_count = 0;
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handler->after = after != FALSE;
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handler->closure = NULL;
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return handler;
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}
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static inline void
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handler_ref (Handler *handler)
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{
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g_return_if_fail (handler->ref_count > 0);
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#ifndef G_DISABLE_CHECKS
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if (handler->ref_count >= HANDLER_MAX_REF_COUNT - 1)
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g_error (G_STRLOC ": handler ref_count overflow, %s", REPORT_BUG);
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#endif
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handler->ref_count += 1;
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}
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static inline void
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handler_unref_R (guint signal_id,
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gpointer instance,
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Handler *handler)
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{
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g_return_if_fail (handler->ref_count > 0);
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handler->ref_count -= 1;
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if (!handler->ref_count)
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{
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if (handler->next)
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handler->next->prev = handler->prev;
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if (handler->prev) /* watch out for g_signal_handlers_destroy()! */
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handler->prev->next = handler->next;
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else
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{
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HandlerList *hlist = handler_list_lookup (signal_id, instance);
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hlist->handlers = handler->next;
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}
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G_UNLOCK (g_signal_mutex);
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g_closure_unref (handler->closure);
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G_LOCK (g_signal_mutex);
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g_generic_node_free (&g_handler_ts, handler);
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}
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}
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static void
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handler_insert (guint signal_id,
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gpointer instance,
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Handler *handler)
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{
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HandlerList *hlist;
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g_assert (handler->prev == NULL && handler->next == NULL); // FIXME: paranoid
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hlist = handler_list_ensure (signal_id, instance);
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if (!hlist->handlers)
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hlist->handlers = handler;
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else if (hlist->handlers->after && !handler->after)
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{
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handler->next = hlist->handlers;
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hlist->handlers->prev = handler;
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hlist->handlers = handler;
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}
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else
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{
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Handler *tmp = hlist->handlers;
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if (handler->after)
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while (tmp->next)
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tmp = tmp->next;
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else
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while (tmp->next && !tmp->next->after)
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tmp = tmp->next;
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if (tmp->next)
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tmp->next->prev = handler;
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handler->next = tmp->next;
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handler->prev = tmp;
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tmp->next = handler;
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}
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}
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static inline void
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emission_push (Emission **emission_list_p,
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guint signal_id,
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GQuark detail,
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gpointer instance,
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EmissionState *state_p)
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{
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Emission *emission = g_generic_node_alloc (&g_emission_ts,
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sizeof (Emission),
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EMISSION_PRE_ALLOC);
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emission->next = *emission_list_p;
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emission->signal_id = signal_id;
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emission->detail = detail;
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emission->instance = instance;
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emission->state_p = state_p;
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*emission_list_p = emission;
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}
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static inline void
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emission_pop (Emission **emission_list_p,
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EmissionState *state_p)
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{
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Emission **loc = emission_list_p, *emission = *loc;
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while (emission->state_p != state_p)
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{
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loc = &emission->next;
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emission = *loc;
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}
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*loc = emission->next;
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g_generic_node_free (&g_emission_ts, emission);
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}
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static inline Emission*
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emission_find (Emission *emission_list,
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guint signal_id,
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GQuark detail,
|
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gpointer instance)
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{
|
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Emission *emission;
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for (emission = emission_list; emission; emission = emission->next)
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if (emission->instance == instance &&
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emission->signal_id == signal_id &&
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emission->detail == detail)
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return emission;
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return NULL;
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}
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|
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static gint
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signal_key_cmp (gconstpointer node1,
|
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gconstpointer node2)
|
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{
|
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const SignalKey *key1 = node1, *key2 = node2;
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|
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if (key1->itype == key2->itype)
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return G_BSEARCH_ARRAY_CMP (key1->quark, key2->quark);
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else
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return G_BSEARCH_ARRAY_CMP (key1->itype, key2->itype);
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}
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|
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void
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g_signal_init (void) /* sync with gtype.c */
|
|
{
|
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G_LOCK (g_signal_mutex);
|
|
if (!g_n_signal_nodes)
|
|
{
|
|
/* setup signal key array */
|
|
g_signal_key_bsa.cmp_func = signal_key_cmp;
|
|
g_signal_key_bsa.sizeof_node = sizeof (SignalKey);
|
|
g_signal_key_bsa.flags = 0; /* alloc-only */
|
|
|
|
/* 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);
|
|
|
|
/* 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;
|
|
}
|
|
G_UNLOCK (g_signal_mutex);
|
|
}
|
|
|
|
void
|
|
g_signals_destroy (GType itype)
|
|
{
|
|
guint i;
|
|
gboolean found_one = FALSE;
|
|
|
|
G_LOCK (g_signal_mutex);
|
|
for (i = 0; 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,
|
|
g_type_name (node->itype));
|
|
else
|
|
{
|
|
found_one = TRUE;
|
|
signal_destroy_R (node);
|
|
}
|
|
}
|
|
}
|
|
if (!found_one)
|
|
g_warning (G_STRLOC ": type `%s' has no signals that could be destroyed",
|
|
g_type_name (itype));
|
|
G_UNLOCK (g_signal_mutex);
|
|
}
|
|
|
|
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);
|
|
|
|
G_LOCK (g_signal_mutex);
|
|
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);
|
|
G_UNLOCK (g_signal_mutex);
|
|
return;
|
|
}
|
|
if (node && g_type_conforms_to (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_p == EMISSION_HOOK)
|
|
g_warning (G_STRLOC ": emission of signal \"%s\" for instance `%p' cannot be stopped from emission hook",
|
|
node->name, instance);
|
|
else if (*emission->state_p == EMISSION_RUN)
|
|
*emission->state_p = EMISSION_STOP;
|
|
}
|
|
else
|
|
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);
|
|
G_UNLOCK (g_signal_mutex);
|
|
}
|
|
|
|
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);
|
|
|
|
G_LOCK (g_signal_mutex);
|
|
signal_id = signal_id_lookup (g_quark_try_string (name), itype);
|
|
G_UNLOCK (g_signal_mutex);
|
|
|
|
return signal_id;
|
|
}
|
|
|
|
gchar*
|
|
g_signal_name (guint signal_id)
|
|
{
|
|
SignalNode *node;
|
|
gchar *name;
|
|
|
|
G_LOCK (g_signal_mutex);
|
|
node = LOOKUP_SIGNAL_NODE (signal_id);
|
|
name = node ? node->name : NULL;
|
|
G_UNLOCK (g_signal_mutex);
|
|
|
|
return name;
|
|
}
|
|
|
|
void
|
|
g_signal_query (guint signal_id,
|
|
GSignalQuery *query)
|
|
{
|
|
SignalNode *node;
|
|
|
|
g_return_if_fail (query != NULL);
|
|
|
|
G_LOCK (g_signal_mutex);
|
|
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;
|
|
}
|
|
G_UNLOCK (g_signal_mutex);
|
|
}
|
|
|
|
/**
|
|
* gtk_signals_list:
|
|
* @itype: an
|
|
* @n_ids: location to store number of ids in @itype
|
|
*
|
|
* List all signals for a given type.
|
|
*
|
|
* Return value: Array
|
|
**/
|
|
guint *
|
|
g_type_signals (GType itype,
|
|
guint *n_ids)
|
|
{
|
|
guint i;
|
|
SignalKey *keys;
|
|
guint n_nodes;
|
|
GArray *result;
|
|
|
|
g_return_val_if_fail (n_ids != NULL, NULL);
|
|
g_return_val_if_fail (G_TYPE_IS_INSTANTIATABLE (itype) || G_TYPE_IS_INTERFACE (itype), NULL);
|
|
|
|
keys = g_signal_key_bsa.nodes;
|
|
n_nodes = g_signal_key_bsa.n_nodes;
|
|
result = g_array_new (FALSE, FALSE, sizeof (guint));
|
|
|
|
for (i = 0; i < n_nodes; i++)
|
|
{
|
|
if (keys[i].itype == itype)
|
|
g_array_append_val (result, keys[i].signal_id);
|
|
}
|
|
|
|
*n_ids = result->len;
|
|
|
|
return (guint *) g_array_free (result, FALSE);
|
|
}
|
|
|
|
guint
|
|
g_signal_newv (const gchar *signal_name,
|
|
GType itype,
|
|
GSignalFlags signal_flags,
|
|
GClosure *class_closure,
|
|
GSignalAccumulator accumulator,
|
|
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);
|
|
if (return_type != G_TYPE_NONE)
|
|
g_return_val_if_fail (accumulator == NULL, 0);
|
|
|
|
name = g_strdup (signal_name);
|
|
g_strdelimit (name, G_STR_DELIMITERS ":^", '_'); // FIXME do character checks like for types
|
|
|
|
G_LOCK (g_signal_mutex);
|
|
|
|
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,
|
|
g_type_name (node->itype),
|
|
G_TYPE_IS_INTERFACE (node->itype) ? "interface" : "class ancestry");
|
|
g_free (name);
|
|
G_UNLOCK (g_signal_mutex);
|
|
return 0;
|
|
}
|
|
if (node && node->itype != itype)
|
|
{
|
|
g_warning (G_STRLOC ": signal \"%s\" for type `%s' was previously created for type `%s'",
|
|
name,
|
|
g_type_name (itype),
|
|
g_type_name (node->itype));
|
|
g_free (name);
|
|
G_UNLOCK (g_signal_mutex);
|
|
return 0;
|
|
}
|
|
for (i = 0; i < n_params; i++)
|
|
if (!G_TYPE_IS_VALUE (param_types[i]) ||
|
|
param_types[i] == G_TYPE_ENUM || param_types[i] == G_TYPE_FLAGS) /* FIXME: kludge */
|
|
{
|
|
g_warning (G_STRLOC ": parameter %d of type `%s' for signal \"%s::%s\" is not a value type",
|
|
i + 1, g_type_name (param_types[i]), g_type_name (itype), name);
|
|
g_free (name);
|
|
G_UNLOCK (g_signal_mutex);
|
|
return 0;
|
|
}
|
|
if (return_type != G_TYPE_NONE && !G_TYPE_IS_VALUE (return_type))
|
|
{
|
|
g_warning (G_STRLOC ": return value of type `%s' for signal \"%s::%s\" is not a value type",
|
|
g_type_name (param_types[i]), g_type_name (itype), name);
|
|
g_free (name);
|
|
G_UNLOCK (g_signal_mutex);
|
|
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_bsearch_array_insert (&g_signal_key_bsa, &key, FALSE);
|
|
g_strdelimit (node->name, "_", '-');
|
|
key.quark = g_quark_from_static_string (node->name);
|
|
g_bsearch_array_insert (&g_signal_key_bsa, &key, FALSE);
|
|
}
|
|
node->destroyed = FALSE;
|
|
|
|
/* setup reinitializable portion */
|
|
node->flags = signal_flags & G_SIGNAL_FLAGS_MASK;
|
|
node->n_params = n_params;
|
|
node->param_types = g_memdup (param_types, sizeof (GType) * n_params);
|
|
node->return_type = return_type;
|
|
node->class_closure = class_closure ? g_closure_ref (class_closure) : NULL;
|
|
node->accumulator = accumulator;
|
|
node->c_marshaller = c_marshaller;
|
|
node->emission_hooks = NULL;
|
|
if (node->c_marshaller && class_closure && G_CLOSURE_NEEDS_MARSHAL (class_closure))
|
|
g_closure_set_marshal (class_closure, node->c_marshaller);
|
|
|
|
G_UNLOCK (g_signal_mutex);
|
|
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->n_params = 0;
|
|
signal_node->param_types = NULL;
|
|
signal_node->return_type = 0;
|
|
signal_node->class_closure = NULL;
|
|
signal_node->accumulator = NULL;
|
|
signal_node->c_marshaller = NULL;
|
|
signal_node->emission_hooks = NULL;
|
|
|
|
#ifndef G_DISABLE_CHECKS
|
|
/* 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->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
|
|
*/
|
|
G_UNLOCK (g_signal_mutex);
|
|
g_free (node.param_types);
|
|
g_closure_unref (node.class_closure);
|
|
if (node.emission_hooks)
|
|
{
|
|
g_hook_list_clear (node.emission_hooks);
|
|
g_free (node.emission_hooks);
|
|
}
|
|
G_LOCK (g_signal_mutex);
|
|
}
|
|
|
|
guint
|
|
g_signal_connect_closure (gpointer instance,
|
|
guint signal_id,
|
|
GQuark detail,
|
|
GClosure *closure,
|
|
gboolean after)
|
|
{
|
|
SignalNode *node;
|
|
guint handler_id = 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);
|
|
|
|
G_LOCK (g_signal_mutex);
|
|
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);
|
|
G_UNLOCK (g_signal_mutex);
|
|
return 0;
|
|
}
|
|
if (node && g_type_conforms_to (G_TYPE_FROM_INSTANCE (instance), node->itype))
|
|
{
|
|
Handler *handler = handler_new (after);
|
|
|
|
handler_id = handler->id;
|
|
handler->detail = detail;
|
|
handler->closure = g_closure_ref (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);
|
|
G_UNLOCK (g_signal_mutex);
|
|
|
|
return handler_id;
|
|
}
|
|
|
|
void
|
|
g_signal_handler_disconnect (gpointer instance,
|
|
guint handler_id)
|
|
{
|
|
Handler *handler;
|
|
guint signal_id;
|
|
|
|
g_return_if_fail (G_TYPE_CHECK_INSTANCE (instance));
|
|
g_return_if_fail (handler_id > 0);
|
|
|
|
G_LOCK (g_signal_mutex);
|
|
handler = handler_lookup (instance, handler_id, &signal_id);
|
|
if (handler)
|
|
{
|
|
handler->id = 0;
|
|
handler->block_count = 1;
|
|
handler_unref_R (signal_id, instance, handler);
|
|
}
|
|
else
|
|
g_warning ("%s: instance `%p' has no handler with id `%u'", G_STRLOC, instance, handler_id);
|
|
G_UNLOCK (g_signal_mutex);
|
|
}
|
|
|
|
void
|
|
g_signal_handlers_destroy (gpointer instance)
|
|
{
|
|
GBSearchArray *hlbsa;
|
|
|
|
g_return_if_fail (G_TYPE_CHECK_INSTANCE (instance));
|
|
|
|
G_LOCK (g_signal_mutex);
|
|
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, 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->id)
|
|
{
|
|
tmp->id = 0;
|
|
handler_unref_R (0, NULL, tmp);
|
|
}
|
|
}
|
|
}
|
|
g_free (hlbsa->nodes);
|
|
g_generic_node_free (&g_bsa_ts, hlbsa);
|
|
}
|
|
G_UNLOCK (g_signal_mutex);
|
|
}
|
|
|
|
void
|
|
g_signal_handler_block (gpointer instance,
|
|
guint handler_id)
|
|
{
|
|
Handler *handler;
|
|
|
|
g_return_if_fail (G_TYPE_CHECK_INSTANCE (instance));
|
|
g_return_if_fail (handler_id > 0);
|
|
|
|
G_LOCK (g_signal_mutex);
|
|
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 `%u'", G_STRLOC, instance, handler_id);
|
|
G_UNLOCK (g_signal_mutex);
|
|
}
|
|
|
|
void
|
|
g_signal_handler_unblock (gpointer instance,
|
|
guint handler_id)
|
|
{
|
|
Handler *handler;
|
|
|
|
g_return_if_fail (G_TYPE_CHECK_INSTANCE (instance));
|
|
g_return_if_fail (handler_id > 0);
|
|
|
|
G_LOCK (g_signal_mutex);
|
|
handler = handler_lookup (instance, handler_id, NULL);
|
|
if (handler)
|
|
{
|
|
if (handler->block_count)
|
|
handler->block_count -= 1;
|
|
else
|
|
g_warning (G_STRLOC ": handler `%u' of instance `%p' is not blocked", handler_id, instance);
|
|
}
|
|
else
|
|
g_warning ("%s: instance `%p' has no handler with id `%u'", G_STRLOC, instance, handler_id);
|
|
G_UNLOCK (g_signal_mutex);
|
|
}
|
|
|
|
guint
|
|
g_signal_handler_find (gpointer instance,
|
|
GSignalMatchType mask,
|
|
guint signal_id,
|
|
GQuark detail,
|
|
GClosure *closure,
|
|
gpointer func,
|
|
gpointer data)
|
|
{
|
|
Handler *handler = NULL;
|
|
guint handler_id;
|
|
|
|
g_return_val_if_fail (G_TYPE_CHECK_INSTANCE (instance), 0);
|
|
g_return_val_if_fail ((mask & ~G_SIGNAL_MATCH_MASK) == 0, 0);
|
|
|
|
G_LOCK (g_signal_mutex);
|
|
handler = handler_find (instance, mask, signal_id, detail, closure, func, data);
|
|
handler_id = handler ? handler->id : 0;
|
|
G_UNLOCK (g_signal_mutex);
|
|
|
|
return handler_id;
|
|
}
|
|
|
|
gboolean
|
|
g_signal_handler_pending (gpointer instance,
|
|
guint signal_id,
|
|
GQuark detail,
|
|
gboolean may_be_blocked)
|
|
{
|
|
Handler *handler = NULL;
|
|
|
|
g_return_val_if_fail (G_TYPE_CHECK_INSTANCE (instance), FALSE);
|
|
g_return_val_if_fail (signal_id > 0, FALSE);
|
|
|
|
G_LOCK (g_signal_mutex);
|
|
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);
|
|
G_UNLOCK (g_signal_mutex);
|
|
return FALSE;
|
|
}
|
|
}
|
|
handler = handler_find (instance,
|
|
(G_SIGNAL_MATCH_ID | G_SIGNAL_MATCH_DETAIL |
|
|
(may_be_blocked ? 0 : G_SIGNAL_MATCH_UNBLOCKED)),
|
|
signal_id, detail, NULL, NULL, NULL);
|
|
G_UNLOCK (g_signal_mutex);
|
|
|
|
return handler != NULL;
|
|
}
|
|
|
|
void
|
|
g_signal_emitv (const GValue *instance_and_params,
|
|
guint signal_id,
|
|
GQuark detail,
|
|
GValue *return_value)
|
|
{
|
|
SignalNode *node;
|
|
gpointer instance;
|
|
const GValue *param_values;
|
|
guint i;
|
|
|
|
g_return_if_fail (instance_and_params != NULL);
|
|
instance = g_value_get_as_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;
|
|
|
|
G_LOCK (g_signal_mutex);
|
|
node = LOOKUP_SIGNAL_NODE (signal_id);
|
|
#ifndef G_DISABLE_CHECKS
|
|
if (!node || !g_type_conforms_to (G_TYPE_FROM_INSTANCE (instance), node->itype))
|
|
g_warning ("%s: signal id `%u' is invalid for instance `%p'", G_STRLOC, signal_id, instance);
|
|
if (detail && !(node->flags & G_SIGNAL_DETAILED))
|
|
{
|
|
g_warning ("%s: signal id `%u' does not support detail (%u)", G_STRLOC, signal_id, detail);
|
|
G_UNLOCK (g_signal_mutex);
|
|
return;
|
|
}
|
|
for (i = 0; i < node->n_params; i++)
|
|
if (!G_VALUE_HOLDS (param_values + i, node->param_types[i]))
|
|
{
|
|
g_critical (G_STRLOC ": value for `%s' parameter %u for signal \"%s\" is of type `%s'",
|
|
g_type_name (node->param_types[i]),
|
|
i,
|
|
node->name,
|
|
G_VALUE_TYPE_NAME (param_values + i));
|
|
G_UNLOCK (g_signal_mutex);
|
|
return;
|
|
}
|
|
if (node->return_type != G_TYPE_NONE)
|
|
{
|
|
if (!return_value)
|
|
{
|
|
g_critical (G_STRLOC ": return value `%s' for signal \"%s\" is (NULL)",
|
|
g_type_name (node->return_type),
|
|
node->name);
|
|
G_UNLOCK (g_signal_mutex);
|
|
return;
|
|
}
|
|
else if (!node->accumulator && !G_VALUE_HOLDS (return_value, node->return_type))
|
|
{
|
|
g_critical (G_STRLOC ": return value `%s' for signal \"%s\" is of type `%s'",
|
|
g_type_name (node->return_type),
|
|
node->name,
|
|
G_VALUE_TYPE_NAME (return_value));
|
|
G_UNLOCK (g_signal_mutex);
|
|
return;
|
|
}
|
|
}
|
|
else
|
|
return_value = NULL;
|
|
#endif /* !G_DISABLE_CHECKS */
|
|
|
|
signal_emit_R (node, detail, instance, return_value, instance_and_params);
|
|
|
|
G_UNLOCK (g_signal_mutex);
|
|
}
|
|
|
|
static void
|
|
signal_emit_R (SignalNode *node,
|
|
GQuark detail,
|
|
gpointer instance,
|
|
GValue *return_value,
|
|
const GValue *instance_and_params)
|
|
{
|
|
EmissionState emission_state = 0;
|
|
GSignalAccumulator accumulator;
|
|
GSignalInvocationHint ihint;
|
|
GClosure *class_closure;
|
|
HandlerList *hlist;
|
|
Handler *handler_list = NULL;
|
|
GValue accu;
|
|
gboolean accu_used = FALSE;
|
|
guint signal_id = node->signal_id;
|
|
|
|
if (node->flags & G_SIGNAL_NO_RECURSE)
|
|
{
|
|
Emission *emission = emission_find (g_restart_emissions, signal_id, detail, instance);
|
|
|
|
if (emission)
|
|
{
|
|
*emission->state_p = EMISSION_RESTART;
|
|
return;
|
|
}
|
|
}
|
|
ihint.signal_id = node->signal_id;
|
|
ihint.detail = detail;
|
|
accumulator = node->accumulator;
|
|
if (accumulator)
|
|
{
|
|
G_UNLOCK (g_signal_mutex);
|
|
g_value_init (&accu, node->return_type);
|
|
G_LOCK (g_signal_mutex);
|
|
}
|
|
emission_push ((node->flags & G_SIGNAL_NO_RECURSE) ? &g_restart_emissions : &g_recursive_emissions,
|
|
signal_id, detail, instance, &emission_state);
|
|
class_closure = node->class_closure;
|
|
|
|
EMIT_RESTART:
|
|
|
|
if (handler_list)
|
|
handler_unref_R (signal_id, instance, handler_list);
|
|
hlist = handler_list_lookup (signal_id, instance);
|
|
handler_list = hlist ? hlist->handlers : NULL;
|
|
if (handler_list)
|
|
handler_ref (handler_list);
|
|
|
|
ihint.run_type = G_SIGNAL_RUN_FIRST;
|
|
|
|
if ((node->flags & G_SIGNAL_RUN_FIRST) && class_closure)
|
|
{
|
|
emission_state = EMISSION_RUN;
|
|
|
|
G_UNLOCK (g_signal_mutex);
|
|
if (accumulator)
|
|
{
|
|
if (accu_used)
|
|
g_value_reset (&accu);
|
|
g_closure_invoke (class_closure,
|
|
&accu,
|
|
node->n_params + 1,
|
|
instance_and_params,
|
|
&ihint);
|
|
if (!accumulator (&ihint, return_value, &accu) &&
|
|
emission_state == EMISSION_RUN)
|
|
emission_state = EMISSION_STOP;
|
|
accu_used = TRUE;
|
|
}
|
|
else
|
|
g_closure_invoke (class_closure,
|
|
return_value,
|
|
node->n_params + 1,
|
|
instance_and_params,
|
|
&ihint);
|
|
G_LOCK (g_signal_mutex);
|
|
|
|
if (emission_state == EMISSION_STOP)
|
|
goto EMIT_CLEANUP;
|
|
else if (emission_state == EMISSION_RESTART)
|
|
goto EMIT_RESTART;
|
|
}
|
|
|
|
if (node->emission_hooks)
|
|
{
|
|
emission_state = EMISSION_HOOK;
|
|
|
|
G_UNLOCK (g_signal_mutex);
|
|
g_print ("emission_hooks()\n");
|
|
G_LOCK (g_signal_mutex);
|
|
|
|
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))
|
|
{
|
|
G_UNLOCK (g_signal_mutex);
|
|
if (accumulator)
|
|
{
|
|
if (accu_used)
|
|
g_value_reset (&accu);
|
|
g_closure_invoke (handler->closure,
|
|
&accu,
|
|
node->n_params + 1,
|
|
instance_and_params,
|
|
&ihint);
|
|
if (!accumulator (&ihint, return_value, &accu) &&
|
|
emission_state == EMISSION_RUN)
|
|
emission_state = EMISSION_STOP;
|
|
accu_used = TRUE;
|
|
}
|
|
else
|
|
g_closure_invoke (handler->closure,
|
|
return_value,
|
|
node->n_params + 1,
|
|
instance_and_params,
|
|
&ihint);
|
|
G_LOCK (g_signal_mutex);
|
|
|
|
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;
|
|
}
|
|
|
|
ihint.run_type = G_SIGNAL_RUN_LAST;
|
|
|
|
if ((node->flags & G_SIGNAL_RUN_LAST) && class_closure)
|
|
{
|
|
emission_state = EMISSION_RUN;
|
|
|
|
G_UNLOCK (g_signal_mutex);
|
|
if (accumulator)
|
|
{
|
|
if (accu_used)
|
|
g_value_reset (&accu);
|
|
g_closure_invoke (class_closure,
|
|
&accu,
|
|
node->n_params + 1,
|
|
instance_and_params,
|
|
&ihint);
|
|
if (!accumulator (&ihint, return_value, &accu) &&
|
|
emission_state == EMISSION_RUN)
|
|
emission_state = EMISSION_STOP;
|
|
accu_used = TRUE;
|
|
}
|
|
else
|
|
g_closure_invoke (class_closure,
|
|
return_value,
|
|
node->n_params + 1,
|
|
instance_and_params,
|
|
&ihint);
|
|
G_LOCK (g_signal_mutex);
|
|
|
|
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))
|
|
{
|
|
G_UNLOCK (g_signal_mutex);
|
|
if (accumulator)
|
|
{
|
|
if (accu_used)
|
|
g_value_reset (&accu);
|
|
g_closure_invoke (handler->closure,
|
|
&accu,
|
|
node->n_params + 1,
|
|
instance_and_params,
|
|
&ihint);
|
|
if (!accumulator (&ihint, return_value, &accu) &&
|
|
emission_state == EMISSION_RUN)
|
|
emission_state = EMISSION_STOP;
|
|
accu_used = TRUE;
|
|
}
|
|
else
|
|
g_closure_invoke (handler->closure,
|
|
return_value,
|
|
node->n_params + 1,
|
|
instance_and_params,
|
|
&ihint);
|
|
G_LOCK (g_signal_mutex);
|
|
|
|
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:
|
|
|
|
ihint.run_type = G_SIGNAL_RUN_CLEANUP;
|
|
|
|
if ((node->flags & G_SIGNAL_RUN_CLEANUP) && class_closure)
|
|
{
|
|
gboolean need_unset = FALSE;
|
|
|
|
emission_state = EMISSION_STOP;
|
|
|
|
G_UNLOCK (g_signal_mutex);
|
|
if (node->return_type != G_TYPE_NONE)
|
|
{
|
|
if (!accumulator)
|
|
{
|
|
g_value_init (&accu, node->return_type);
|
|
need_unset = TRUE;
|
|
}
|
|
else if (accu_used)
|
|
g_value_reset (&accu);
|
|
}
|
|
g_closure_invoke (class_closure,
|
|
node->return_type != G_TYPE_NONE ? &accu : NULL,
|
|
node->n_params + 1,
|
|
instance_and_params,
|
|
&ihint);
|
|
if (need_unset)
|
|
g_value_unset (&accu);
|
|
G_LOCK (g_signal_mutex);
|
|
|
|
if (emission_state == EMISSION_RESTART)
|
|
goto EMIT_RESTART;
|
|
}
|
|
|
|
if (handler_list)
|
|
handler_unref_R (signal_id, instance, handler_list);
|
|
|
|
emission_pop ((node->flags & G_SIGNAL_NO_RECURSE) ? &g_restart_emissions : &g_recursive_emissions, &emission_state);
|
|
if (accumulator)
|
|
{
|
|
G_UNLOCK (g_signal_mutex);
|
|
g_value_unset (&accu);
|
|
G_LOCK (g_signal_mutex);
|
|
}
|
|
}
|