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