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a09e091a JB |
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 | } |