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