cb114f43ab
This adds an internal CoglCallbackList type which is just a GSList of of function pointers along with a data pointer to form a closure. There are functions to add and remove items and to invoke the list of functions. This could be used in a number of places in Cogl.
108 lines
2.6 KiB
C
108 lines
2.6 KiB
C
/*
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* Cogl
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*
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* An object oriented GL/GLES Abstraction/Utility Layer
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*
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* Copyright (C) 2010 Intel Corporation.
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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 Public
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* 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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* Authors:
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* Neil Roberts <neil@linux.intel.com>
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "cogl.h"
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#include "cogl-callback-list.h"
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typedef struct _CoglCallbackListClosure
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{
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CoglCallbackListFunc func;
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void *user_data;
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} CoglCallbackListClosure;
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void
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_cogl_callback_list_init (CoglCallbackList *list)
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{
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list->funcs = NULL;
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}
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void
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_cogl_callback_list_destroy (CoglCallbackList *list)
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{
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while (list->funcs)
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{
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CoglCallbackListClosure *closure = list->funcs->data;
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_cogl_callback_list_remove (list, closure->func, closure->user_data);
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}
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}
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void
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_cogl_callback_list_add (CoglCallbackList *list,
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CoglCallbackListFunc func,
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void *user_data)
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{
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CoglCallbackListClosure *closure = g_slice_new (CoglCallbackListClosure);
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closure->func = func;
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closure->user_data = user_data;
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list->funcs = g_slist_prepend (list->funcs, closure);
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}
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void
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_cogl_callback_list_remove (CoglCallbackList *list,
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CoglCallbackListFunc func,
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void *user_data)
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{
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GSList *prev = NULL, *l;
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for (l = list->funcs; l; l = l->next)
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{
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CoglCallbackListClosure *closure = l->data;
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if (closure->func == func && closure->user_data == user_data)
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{
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g_slice_free (CoglCallbackListClosure, closure);
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if (prev)
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prev->next = g_slist_delete_link (prev->next, l);
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else
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list->funcs = g_slist_delete_link (list->funcs, l);
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break;
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}
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prev = l;
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}
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}
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void
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_cogl_callback_list_invoke (CoglCallbackList *list)
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{
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GSList *l;
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for (l = list->funcs; l; l = l->next)
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{
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CoglCallbackListClosure *closure = l->data;
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closure->func (closure->user_data);
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}
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}
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