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 "uv.h"
23 #include "uv/tree.h"
24 #include "uv_log.h"
25 #include "internal.h"
26 #include "heap-inl.h"
27 #include <stdlib.h>
28 #include <string.h>
29 #include <unistd.h>
30
uv_loop_init(uv_loop_t * loop)31 int uv_loop_init(uv_loop_t* loop) {
32 uv__loop_internal_fields_t* lfields;
33 void* saved_data;
34 int err;
35
36 UV_LOGI("init:%{public}zu", (size_t)loop);
37 saved_data = loop->data;
38 memset(loop, 0, sizeof(*loop));
39 loop->data = saved_data;
40
41 lfields = (uv__loop_internal_fields_t*) uv__calloc(1, sizeof(*lfields));
42 if (lfields == NULL)
43 return UV_ENOMEM;
44 loop->internal_fields = lfields;
45
46 err = uv_mutex_init(&lfields->loop_metrics.lock);
47 if (err)
48 goto fail_metrics_mutex_init;
49 memset(&lfields->loop_metrics.metrics,
50 0,
51 sizeof(lfields->loop_metrics.metrics));
52
53 heap_init((struct heap*) &loop->timer_heap);
54 uv__queue_init(&loop->wq);
55 #ifdef USE_FFRT
56 uv__loop_internal_fields_t* lfields_qos = uv__get_internal_fields(loop);
57 uv__queue_init(&(lfields_qos->wq_sub[uv_qos_background]));
58 uv__queue_init(&(lfields_qos->wq_sub[uv_qos_utility]));
59 uv__queue_init(&(lfields_qos->wq_sub[uv_qos_default]));
60 uv__queue_init(&(lfields_qos->wq_sub[uv_qos_user_initiated]));
61 #endif
62
63 uv__queue_init(&loop->idle_handles);
64 uv__queue_init(&loop->async_handles);
65 uv__queue_init(&loop->check_handles);
66 uv__queue_init(&loop->prepare_handles);
67 uv__queue_init(&loop->handle_queue);
68
69 loop->active_handles = 0;
70 loop->active_reqs.count = 0;
71 loop->nfds = 0;
72 loop->watchers = NULL;
73 loop->nwatchers = 0;
74 uv__queue_init(&loop->pending_queue);
75 uv__queue_init(&loop->watcher_queue);
76
77 loop->closing_handles = NULL;
78 uv__update_time(loop);
79 loop->async_io_watcher.fd = -1;
80 loop->async_wfd = -1;
81 loop->signal_pipefd[0] = -1;
82 loop->signal_pipefd[1] = -1;
83 loop->backend_fd = -1;
84 loop->emfile_fd = -1;
85
86 loop->timer_counter = 0;
87 loop->stop_flag = 0;
88
89 err = uv__platform_loop_init(loop);
90 if (err)
91 goto fail_platform_init;
92
93 uv__signal_global_once_init();
94 err = uv__process_init(loop);
95 if (err)
96 goto fail_signal_init;
97 uv__queue_init(&loop->process_handles);
98
99 err = uv_rwlock_init(&loop->cloexec_lock);
100 if (err)
101 goto fail_rwlock_init;
102
103 err = uv_mutex_init(&loop->wq_mutex);
104 if (err)
105 goto fail_mutex_init;
106
107 err = uv_async_init(loop, &loop->wq_async, uv__work_done);
108 if (err)
109 goto fail_async_init;
110
111 uv__handle_unref(&loop->wq_async);
112 loop->wq_async.flags |= UV_HANDLE_INTERNAL;
113
114 loop->magic = UV_LOOP_MAGIC;
115 return 0;
116
117 fail_async_init:
118 uv_mutex_destroy(&loop->wq_mutex);
119
120 fail_mutex_init:
121 uv_rwlock_destroy(&loop->cloexec_lock);
122
123 fail_rwlock_init:
124 uv__signal_loop_cleanup(loop);
125
126 fail_signal_init:
127 uv__platform_loop_delete(loop);
128
129 fail_platform_init:
130 uv_mutex_destroy(&lfields->loop_metrics.lock);
131
132 fail_metrics_mutex_init:
133 uv__free(lfields);
134 loop->internal_fields = NULL;
135
136 uv__free(loop->watchers);
137 loop->nwatchers = 0;
138 return err;
139 }
140
141
uv_loop_fork(uv_loop_t * loop)142 int uv_loop_fork(uv_loop_t* loop) {
143 int err;
144 unsigned int i;
145 uv__io_t* w;
146
147 err = uv__io_fork(loop);
148 if (err)
149 return err;
150
151 err = uv__async_fork(loop);
152 if (err)
153 return err;
154
155 err = uv__signal_loop_fork(loop);
156 if (err)
157 return err;
158
159 /* Rearm all the watchers that aren't re-queued by the above. */
160 for (i = 0; i < loop->nwatchers; i++) {
161 w = loop->watchers[i];
162 if (w == NULL)
163 continue;
164
165 if (w->pevents != 0 && uv__queue_empty(&w->watcher_queue)) {
166 w->events = 0; /* Force re-registration in uv__io_poll. */
167 uv__queue_insert_tail(&loop->watcher_queue, &w->watcher_queue);
168 }
169 }
170
171 return 0;
172 }
173
174
uv__loop_close(uv_loop_t * loop)175 void uv__loop_close(uv_loop_t* loop) {
176 uv__loop_internal_fields_t* lfields;
177
178 uv__signal_loop_cleanup(loop);
179 uv__platform_loop_delete(loop);
180 uv__async_stop(loop);
181
182 if (loop->emfile_fd != -1) {
183 uv__close(loop->emfile_fd);
184 loop->emfile_fd = -1;
185 }
186
187 if (loop->backend_fd != -1) {
188 #ifdef USE_OHOS_DFX
189 fdsan_close_with_tag(loop->backend_fd, uv__get_addr_tag((void *)&loop->backend_fd));
190 #else
191 uv__close(loop->backend_fd);
192 #endif
193 UV_LOGI("close:%{public}zu, backend_fd:%{public}d", (size_t)loop, loop->backend_fd);
194 loop->backend_fd = -1;
195 }
196
197 uv_mutex_lock(&loop->wq_mutex);
198 #ifndef USE_FFRT
199 assert(uv__queue_empty(&loop->wq) && "thread pool work queue not empty!");
200 #endif
201 assert(!uv__has_active_reqs(loop));
202 uv_mutex_unlock(&loop->wq_mutex);
203 uv_mutex_destroy(&loop->wq_mutex);
204
205 /*
206 * Note that all thread pool stuff is finished at this point and
207 * it is safe to just destroy rw lock
208 */
209 uv_rwlock_destroy(&loop->cloexec_lock);
210
211 #if 0
212 assert(uv__queue_empty(&loop->pending_queue));
213 assert(uv__queue_empty(&loop->watcher_queue));
214 assert(loop->nfds == 0);
215 #endif
216
217 uv__free(loop->watchers);
218 loop->watchers = NULL;
219 loop->nwatchers = 0;
220
221 lfields = uv__get_internal_fields(loop);
222 uv_mutex_destroy(&lfields->loop_metrics.lock);
223 uv__free(lfields);
224 loop->internal_fields = NULL;
225 loop->magic = ~UV_LOOP_MAGIC;
226 }
227
228
uv__loop_configure(uv_loop_t * loop,uv_loop_option option,va_list ap)229 int uv__loop_configure(uv_loop_t* loop, uv_loop_option option, va_list ap) {
230 uv__loop_internal_fields_t* lfields;
231
232 lfields = uv__get_internal_fields(loop);
233 if (option == UV_METRICS_IDLE_TIME) {
234 lfields->flags |= UV_METRICS_IDLE_TIME;
235 return 0;
236 }
237
238 if (option != UV_LOOP_BLOCK_SIGNAL)
239 return UV_ENOSYS;
240
241 if (va_arg(ap, int) != SIGPROF)
242 return UV_EINVAL;
243
244 loop->flags |= UV_LOOP_BLOCK_SIGPROF;
245 return 0;
246 }
247