110 lines
3.1 KiB
C
110 lines
3.1 KiB
C
/* x-hook.c
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Copyright (c) 2003 Apple Computer, Inc. All rights reserved.
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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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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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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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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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#ifdef HAVE_DIX_CONFIG_H
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#include <dix-config.h>
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#endif
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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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#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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{
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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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{
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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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{
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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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{
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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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{
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x_list *node, *cell;
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x_hook_function **fun;
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void **data;
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int length, i;
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length = X_PFX (list_length) (lst);
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fun = alloca (sizeof (x_hook_function *) * length);
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data = alloca (sizeof (void *) * length);
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for (i = 0, node = lst; node != NULL; node = node->next, i++)
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{
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cell = node->data;
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fun[i] = CELL_FUN (cell);
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data[i] = CELL_DATA (cell);
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}
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for (i = 0; i < length; i++)
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{
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(*fun[i]) (arg, data[i]);
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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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{
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x_list *node;
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for (node = lst; node != NULL; node = node->next)
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{
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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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