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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 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.
*/
/*
* 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__
#include <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;
GMemChunk *hook_memchunk;
GHookFinalizeFunc finalize_hook;
};
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 mainenance functions */
void g_hook_list_init (GHookList *hook_list,
guint hook_size);
void g_hook_list_clear (GHookList *hook_list);
GHook* g_hook_alloc (GHookList *hook_list);
void g_hook_free (GHookList *hook_list,
GHook *hook);
void g_hook_ref (GHookList *hook_list,
GHook *hook);
void g_hook_unref (GHookList *hook_list,
GHook *hook);
gboolean g_hook_destroy (GHookList *hook_list,
gulong hook_id);
void g_hook_destroy_link (GHookList *hook_list,
GHook *hook);
void g_hook_prepend (GHookList *hook_list,
GHook *hook);
void g_hook_insert_before (GHookList *hook_list,
GHook *sibling,
GHook *hook);
void g_hook_insert_sorted (GHookList *hook_list,
GHook *hook,
GHookCompareFunc func);
GHook* g_hook_get (GHookList *hook_list,
gulong hook_id);
GHook* g_hook_find (GHookList *hook_list,
gboolean need_valids,
GHookFindFunc func,
gpointer data);
GHook* g_hook_find_data (GHookList *hook_list,
gboolean need_valids,
gpointer data);
GHook* g_hook_find_func (GHookList *hook_list,
gboolean need_valids,
gpointer func);
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 */
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
*/
GHook* g_hook_next_valid (GHookList *hook_list,
GHook *hook,
gboolean may_be_in_call);
/* GHookCompareFunc implementation to insert hooks sorted by their id */
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.
*/
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.
*/
void g_hook_list_invoke_check (GHookList *hook_list,
gboolean may_recurse);
/* invoke a marshaller on all valid hooks.
*/
void g_hook_list_marshal (GHookList *hook_list,
gboolean may_recurse,
GHookMarshaller marshaller,
gpointer marshal_data);
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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