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Editing: ghook.h
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/* GLIB - Library of useful routines for C programming * Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald * * 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 2.1 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, see <http://www.gnu.org/licenses/>. */ /* * Modified by the GLib Team and others 1997-2000. See the AUTHORS * file for a list of people on the GLib Team. See the ChangeLog * files for a list of changes. These files are distributed with * GLib at ftp://ftp.gtk.org/pub/gtk/. */ #ifndef __G_HOOK_H__ #define __G_HOOK_H__ #if !defined (__GLIB_H_INSIDE__) && !defined (GLIB_COMPILATION) #error "Only <glib.h> can be included directly." #endif #include <glib/gmem.h> G_BEGIN_DECLS /* --- typedefs --- */ typedef struct _GHook GHook; typedef struct _GHookList GHookList; typedef gint (*GHookCompareFunc) (GHook *new_hook, GHook *sibling); typedef gboolean (*GHookFindFunc) (GHook *hook, gpointer data); typedef void (*GHookMarshaller) (GHook *hook, gpointer marshal_data); typedef gboolean (*GHookCheckMarshaller) (GHook *hook, gpointer marshal_data); typedef void (*GHookFunc) (gpointer data); typedef gboolean (*GHookCheckFunc) (gpointer data); typedef void (*GHookFinalizeFunc) (GHookList *hook_list, GHook *hook); typedef enum { G_HOOK_FLAG_ACTIVE = 1 << 0, G_HOOK_FLAG_IN_CALL = 1 << 1, G_HOOK_FLAG_MASK = 0x0f } GHookFlagMask; #define G_HOOK_FLAG_USER_SHIFT (4) /* --- structures --- */ struct _GHookList { gulong seq_id; guint hook_size : 16; guint is_setup : 1; GHook *hooks; gpointer dummy3; GHookFinalizeFunc finalize_hook; gpointer dummy[2]; }; struct _GHook { gpointer data; GHook *next; GHook *prev; guint ref_count; gulong hook_id; guint flags; gpointer func; GDestroyNotify destroy; }; /* --- macros --- */ #define G_HOOK(hook) ((GHook*) (hook)) #define G_HOOK_FLAGS(hook) (G_HOOK (hook)->flags) #define G_HOOK_ACTIVE(hook) ((G_HOOK_FLAGS (hook) & \ G_HOOK_FLAG_ACTIVE) != 0) #define G_HOOK_IN_CALL(hook) ((G_HOOK_FLAGS (hook) & \ G_HOOK_FLAG_IN_CALL) != 0) #define G_HOOK_IS_VALID(hook) (G_HOOK (hook)->hook_id != 0 && \ (G_HOOK_FLAGS (hook) & \ G_HOOK_FLAG_ACTIVE)) #define G_HOOK_IS_UNLINKED(hook) (G_HOOK (hook)->next == NULL && \ G_HOOK (hook)->prev == NULL && \ G_HOOK (hook)->hook_id == 0 && \ G_HOOK (hook)->ref_count == 0) /* --- prototypes --- */ /* callback maintenance functions */ GLIB_AVAILABLE_IN_ALL void g_hook_list_init (GHookList *hook_list, guint hook_size); GLIB_AVAILABLE_IN_ALL void g_hook_list_clear (GHookList *hook_list); GLIB_AVAILABLE_IN_ALL GHook* g_hook_alloc (GHookList *hook_list); GLIB_AVAILABLE_IN_ALL void g_hook_free (GHookList *hook_list, GHook *hook); GLIB_AVAILABLE_IN_ALL GHook * g_hook_ref (GHookList *hook_list, GHook *hook); GLIB_AVAILABLE_IN_ALL void g_hook_unref (GHookList *hook_list, GHook *hook); GLIB_AVAILABLE_IN_ALL gboolean g_hook_destroy (GHookList *hook_list, gulong hook_id); GLIB_AVAILABLE_IN_ALL void g_hook_destroy_link (GHookList *hook_list, GHook *hook); GLIB_AVAILABLE_IN_ALL void g_hook_prepend (GHookList *hook_list, GHook *hook); GLIB_AVAILABLE_IN_ALL void g_hook_insert_before (GHookList *hook_list, GHook *sibling, GHook *hook); GLIB_AVAILABLE_IN_ALL void g_hook_insert_sorted (GHookList *hook_list, GHook *hook, GHookCompareFunc func); GLIB_AVAILABLE_IN_ALL GHook* g_hook_get (GHookList *hook_list, gulong hook_id); GLIB_AVAILABLE_IN_ALL GHook* g_hook_find (GHookList *hook_list, gboolean need_valids, GHookFindFunc func, gpointer data); GLIB_AVAILABLE_IN_ALL GHook* g_hook_find_data (GHookList *hook_list, gboolean need_valids, gpointer data); GLIB_AVAILABLE_IN_ALL GHook* g_hook_find_func (GHookList *hook_list, gboolean need_valids, gpointer func); GLIB_AVAILABLE_IN_ALL GHook* g_hook_find_func_data (GHookList *hook_list, gboolean need_valids, gpointer func, gpointer data); /* return the first valid hook, and increment its reference count */ GLIB_AVAILABLE_IN_ALL GHook* g_hook_first_valid (GHookList *hook_list, gboolean may_be_in_call); /* return the next valid hook with incremented reference count, and * decrement the reference count of the original hook */ GLIB_AVAILABLE_IN_ALL GHook* g_hook_next_valid (GHookList *hook_list, GHook *hook, gboolean may_be_in_call); /* GHookCompareFunc implementation to insert hooks sorted by their id */ GLIB_AVAILABLE_IN_ALL gint g_hook_compare_ids (GHook *new_hook, GHook *sibling); /* convenience macros */ #define g_hook_append( hook_list, hook ) \ g_hook_insert_before ((hook_list), NULL, (hook)) /* invoke all valid hooks with the (*GHookFunc) signature. */ GLIB_AVAILABLE_IN_ALL void g_hook_list_invoke (GHookList *hook_list, gboolean may_recurse); /* invoke all valid hooks with the (*GHookCheckFunc) signature, * and destroy the hook if FALSE is returned. */ GLIB_AVAILABLE_IN_ALL void g_hook_list_invoke_check (GHookList *hook_list, gboolean may_recurse); /* invoke a marshaller on all valid hooks. */ GLIB_AVAILABLE_IN_ALL void g_hook_list_marshal (GHookList *hook_list, gboolean may_recurse, GHookMarshaller marshaller, gpointer marshal_data); GLIB_AVAILABLE_IN_ALL void g_hook_list_marshal_check (GHookList *hook_list, gboolean may_recurse, GHookCheckMarshaller marshaller, gpointer marshal_data); G_END_DECLS #endif /* __G_HOOK_H__ */
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