xenocara/xserver/hw/xquartz/xpr/x-hook.c

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/* x-hook.c
*
* Copyright (c) 2002-2012 Apple Inc. All rights reserved.
*
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation files
* (the "Software"), to deal in the Software without restriction,
* including without limitation the rights to use, copy, modify, merge,
* publish, distribute, sublicense, and/or sell copies of the Software,
* and to permit persons to whom the Software is furnished to do so,
* subject to the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE ABOVE LISTED COPYRIGHT
* HOLDER(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*
* Except as contained in this notice, the name(s) of the above
* copyright holders shall not be used in advertising or otherwise to
* promote the sale, use or other dealings in this Software without
* prior written authorization.
*/
#ifdef HAVE_DIX_CONFIG_H
#include <dix-config.h>
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#endif
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#include "x-hook.h"
#include <stdlib.h>
#include <assert.h>
#include "os.h"
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#define CELL_NEW(f, d) X_PFX(list_prepend) ((x_list *)(f), (d))
#define CELL_FREE(c) X_PFX(list_free_1) (c)
#define CELL_FUN(c) ((x_hook_function *)((c)->next))
#define CELL_DATA(c) ((c)->data)
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X_EXTERN x_list *
X_PFX(hook_add) (x_list * lst, x_hook_function * fun, void *data) {
return X_PFX(list_prepend) (lst, CELL_NEW(fun, data));
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}
X_EXTERN x_list *
X_PFX(hook_remove) (x_list * lst, x_hook_function * fun, void *data) {
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x_list *node, *cell;
x_list *to_delete = NULL;
for (node = lst; node != NULL; node = node->next) {
cell = node->data;
if (CELL_FUN(cell) == fun && CELL_DATA(cell) == data)
to_delete = X_PFX(list_prepend) (to_delete, cell);
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}
for (node = to_delete; node != NULL; node = node->next) {
cell = node->data;
lst = X_PFX(list_remove) (lst, cell);
CELL_FREE(cell);
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}
X_PFX(list_free) (to_delete);
return lst;
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}
X_EXTERN void
X_PFX(hook_run) (x_list * lst, void *arg) {
x_list *node;
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if (!lst)
return;
for (node = lst; node != NULL; node = node->next) {
x_list *cell = node->data;
x_hook_function *fun = CELL_FUN(cell);
void *data = CELL_DATA(cell);
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(*fun)(arg, data);
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}
}
X_EXTERN void
X_PFX(hook_free) (x_list * lst) {
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x_list *node;
for (node = lst; node != NULL; node = node->next) {
CELL_FREE(node->data);
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}
X_PFX(list_free) (lst);
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}