1 /* Copyright Joyent, Inc. and other Node contributors. All rights reserved.
2 *
3 * Permission is hereby granted, free of charge, to any person obtaining a copy
4 * of this software and associated documentation files (the "Software"), to
5 * deal in the Software without restriction, including without limitation the
6 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
7 * sell copies of the Software, and to permit persons to whom the Software is
8 * furnished to do so, subject to the following conditions:
9 *
10 * The above copyright notice and this permission notice shall be included in
11 * all copies or substantial portions of the Software.
12 *
13 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
14 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
15 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
16 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
17 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
18 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
19 * IN THE SOFTWARE.
20 */
21
22 #include <assert.h>
23
24 #include "uv.h"
25 #include "internal.h"
26 #include "handle-inl.h"
27
28
uv__loop_watcher_endgame(uv_loop_t * loop,uv_handle_t * handle)29 void uv__loop_watcher_endgame(uv_loop_t* loop, uv_handle_t* handle) {
30 if (handle->flags & UV_HANDLE_CLOSING) {
31 assert(!(handle->flags & UV_HANDLE_CLOSED));
32 handle->flags |= UV_HANDLE_CLOSED;
33 uv__handle_close(handle);
34 }
35 }
36
37
38 #define UV_LOOP_WATCHER_DEFINE(name, NAME) \
39 int uv_##name##_init(uv_loop_t* loop, uv_##name##_t* handle) { \
40 uv__handle_init(loop, (uv_handle_t*) handle, UV_##NAME); \
41 \
42 return 0; \
43 } \
44 \
45 \
46 int uv_##name##_start(uv_##name##_t* handle, uv_##name##_cb cb) { \
47 uv_loop_t* loop = handle->loop; \
48 uv_##name##_t* old_head; \
49 \
50 assert(handle->type == UV_##NAME); \
51 \
52 if (uv__is_active(handle)) \
53 return 0; \
54 \
55 if (cb == NULL) \
56 return UV_EINVAL; \
57 \
58 old_head = loop->name##_handles; \
59 \
60 handle->name##_next = old_head; \
61 handle->name##_prev = NULL; \
62 \
63 if (old_head) { \
64 old_head->name##_prev = handle; \
65 } \
66 \
67 loop->name##_handles = handle; \
68 \
69 handle->name##_cb = cb; \
70 uv__handle_start(handle); \
71 \
72 return 0; \
73 } \
74 \
75 \
76 int uv_##name##_stop(uv_##name##_t* handle) { \
77 uv_loop_t* loop = handle->loop; \
78 \
79 assert(handle->type == UV_##NAME); \
80 \
81 if (!uv__is_active(handle)) \
82 return 0; \
83 \
84 /* Update loop head if needed */ \
85 if (loop->name##_handles == handle) { \
86 loop->name##_handles = handle->name##_next; \
87 } \
88 \
89 /* Update the iterator-next pointer of needed */ \
90 if (loop->next_##name##_handle == handle) { \
91 loop->next_##name##_handle = handle->name##_next; \
92 } \
93 \
94 if (handle->name##_prev) { \
95 handle->name##_prev->name##_next = handle->name##_next; \
96 } \
97 if (handle->name##_next) { \
98 handle->name##_next->name##_prev = handle->name##_prev; \
99 } \
100 \
101 uv__handle_stop(handle); \
102 \
103 return 0; \
104 } \
105 \
106 \
107 void uv__##name##_invoke(uv_loop_t* loop) { \
108 uv_##name##_t* handle; \
109 \
110 (loop)->next_##name##_handle = (loop)->name##_handles; \
111 \
112 while ((loop)->next_##name##_handle != NULL) { \
113 handle = (loop)->next_##name##_handle; \
114 (loop)->next_##name##_handle = handle->name##_next; \
115 \
116 handle->name##_cb(handle); \
117 } \
118 }
119
120 UV_LOOP_WATCHER_DEFINE(prepare, PREPARE)
121 UV_LOOP_WATCHER_DEFINE(check, CHECK)
122 UV_LOOP_WATCHER_DEFINE(idle, IDLE)
123
