x-hook.c (2979B)
1 /* x-hook.c 2 * 3 * Copyright (c) 2002-2012 Apple Inc. All rights reserved. 4 * 5 * Permission is hereby granted, free of charge, to any person 6 * obtaining a copy of this software and associated documentation files 7 * (the "Software"), to deal in the Software without restriction, 8 * including without limitation the rights to use, copy, modify, merge, 9 * publish, distribute, sublicense, and/or sell copies of the Software, 10 * and to permit persons to whom the Software is furnished to do so, 11 * subject to the following conditions: 12 * 13 * The above copyright notice and this permission notice shall be 14 * included in all copies or substantial portions of the Software. 15 * 16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 17 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 18 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 19 * NONINFRINGEMENT. IN NO EVENT SHALL THE ABOVE LISTED COPYRIGHT 20 * HOLDER(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, 21 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 22 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 23 * DEALINGS IN THE SOFTWARE. 24 * 25 * Except as contained in this notice, the name(s) of the above 26 * copyright holders shall not be used in advertising or otherwise to 27 * promote the sale, use or other dealings in this Software without 28 * prior written authorization. 29 */ 30 31 #ifdef HAVE_DIX_CONFIG_H 32 #include <dix-config.h> 33 #endif 34 35 #include "x-hook.h" 36 #include <stdlib.h> 37 #include <assert.h> 38 #include "os.h" 39 40 #define CELL_NEW(f, d) X_PFX(list_prepend) ((x_list *)(f), (d)) 41 #define CELL_FREE(c) X_PFX(list_free_1) (c) 42 #define CELL_FUN(c) ((x_hook_function *)((c)->next)) 43 #define CELL_DATA(c) ((c)->data) 44 45 X_EXTERN x_list * 46 X_PFX(hook_add) (x_list * lst, x_hook_function * fun, void *data) { 47 return X_PFX(list_prepend) (lst, CELL_NEW(fun, data)); 48 } 49 50 X_EXTERN x_list * 51 X_PFX(hook_remove) (x_list * lst, x_hook_function * fun, void *data) { 52 x_list *node, *cell; 53 x_list *to_delete = NULL; 54 55 for (node = lst; node != NULL; node = node->next) { 56 cell = node->data; 57 if (CELL_FUN(cell) == fun && CELL_DATA(cell) == data) 58 to_delete = X_PFX(list_prepend) (to_delete, cell); 59 } 60 61 for (node = to_delete; node != NULL; node = node->next) { 62 cell = node->data; 63 lst = X_PFX(list_remove) (lst, cell); 64 CELL_FREE(cell); 65 } 66 67 X_PFX(list_free) (to_delete); 68 return lst; 69 } 70 71 X_EXTERN void 72 X_PFX(hook_run) (x_list * lst, void *arg) { 73 x_list *node; 74 75 if (!lst) 76 return; 77 78 for (node = lst; node != NULL; node = node->next) { 79 x_list *cell = node->data; 80 81 x_hook_function *fun = CELL_FUN(cell); 82 void *data = CELL_DATA(cell); 83 84 (*fun)(arg, data); 85 } 86 } 87 88 X_EXTERN void 89 X_PFX(hook_free) (x_list * lst) { 90 x_list *node; 91 92 for (node = lst; node != NULL; node = node->next) { 93 CELL_FREE(node->data); 94 } 95 96 X_PFX(list_free) (lst); 97 }