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 err = uv_mutex_init(&lfields->loop_metrics.lock);
46 if (err)
47 goto fail_metrics_mutex_init;
48 memset(&lfields->loop_metrics.metrics,
49 0,
50 sizeof(lfields->loop_metrics.metrics));
51
52 heap_init((struct heap*) &loop->timer_heap);
53 uv__queue_init(&loop->wq);
54 #ifdef USE_FFRT
55 uv__loop_internal_fields_t* lfields_qos = uv__get_internal_fields(loop);
56 uv__queue_init(&(lfields_qos->wq_sub[uv_qos_background]));
57 uv__queue_init(&(lfields_qos->wq_sub[uv_qos_utility]));
58 uv__queue_init(&(lfields_qos->wq_sub[uv_qos_default]));
59 uv__queue_init(&(lfields_qos->wq_sub[uv_qos_user_initiated]));
60 uv__queue_init(&(lfields_qos->wq_sub[uv_qos_user_interactive]));
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 #if defined(USE_OHOS_DFX) && defined(__aarch64__)
71 uv__init_thread_id(loop);
72 #endif
73 loop->active_reqs.count = 0;
74 loop->nfds = 0;
75 loop->watchers = NULL;
76 loop->nwatchers = 0;
77 uv__queue_init(&loop->pending_queue);
78 uv__queue_init(&loop->watcher_queue);
79
80 loop->closing_handles = NULL;
81 uv__update_time(loop);
82 loop->async_io_watcher.fd = -1;
83 loop->async_wfd = -1;
84 loop->signal_pipefd[0] = -1;
85 loop->signal_pipefd[1] = -1;
86 loop->backend_fd = -1;
87 loop->emfile_fd = -1;
88
89 loop->timer_counter = 0;
90 loop->stop_flag = 0;
91
92 err = uv__platform_loop_init(loop);
93 if (err)
94 goto fail_platform_init;
95
96 uv__signal_global_once_init();
97 err = uv__process_init(loop);
98 if (err)
99 goto fail_signal_init;
100 uv__queue_init(&loop->process_handles);
101
102 err = uv_rwlock_init(&loop->cloexec_lock);
103 if (err)
104 goto fail_rwlock_init;
105
106 err = uv_mutex_init(&loop->wq_mutex);
107 if (err)
108 goto fail_mutex_init;
109
110 err = uv_async_init(loop, &loop->wq_async, uv__work_done);
111 if (err)
112 goto fail_async_init;
113
114 uv__handle_unref(&loop->wq_async);
115 loop->wq_async.flags |= UV_HANDLE_INTERNAL;
116
117 loop->magic = UV_LOOP_MAGIC;
118 return 0;
119
120 fail_async_init:
121 uv_mutex_destroy(&loop->wq_mutex);
122
123 fail_mutex_init:
124 uv_rwlock_destroy(&loop->cloexec_lock);
125
126 fail_rwlock_init:
127 uv__signal_loop_cleanup(loop);
128
129 fail_signal_init:
130 uv__platform_loop_delete(loop);
131
132 fail_platform_init:
133 uv_mutex_destroy(&lfields->loop_metrics.lock);
134
135 fail_metrics_mutex_init:
136 uv__free(lfields);
137 loop->internal_fields = NULL;
138
139 uv__free(loop->watchers);
140 loop->nwatchers = 0;
141 return err;
142 }
143
144
uv_loop_fork(uv_loop_t * loop)145 int uv_loop_fork(uv_loop_t* loop) {
146 int err;
147 unsigned int i;
148 uv__io_t* w;
149
150 err = uv__io_fork(loop);
151 if (err)
152 return err;
153
154 err = uv__async_fork(loop);
155 if (err)
156 return err;
157
158 err = uv__signal_loop_fork(loop);
159 if (err)
160 return err;
161
162 /* Rearm all the watchers that aren't re-queued by the above. */
163 for (i = 0; i < loop->nwatchers; i++) {
164 w = loop->watchers[i];
165 if (w == NULL)
166 continue;
167
168 if (w->pevents != 0 && uv__queue_empty(&w->watcher_queue)) {
169 w->events = 0; /* Force re-registration in uv__io_poll. */
170 uv__queue_insert_tail(&loop->watcher_queue, &w->watcher_queue);
171 }
172 }
173
174 return 0;
175 }
176
177
uv__loop_close(uv_loop_t * loop)178 void uv__loop_close(uv_loop_t* loop) {
179 uv__loop_internal_fields_t* lfields;
180
181 uv__signal_loop_cleanup(loop);
182 uv__platform_loop_delete(loop);
183 uv__async_stop(loop);
184
185 if (loop->emfile_fd != -1) {
186 uv__close(loop->emfile_fd);
187 loop->emfile_fd = -1;
188 }
189
190 if (loop->backend_fd != -1) {
191 #ifdef USE_OHOS_DFX
192 fdsan_close_with_tag(loop->backend_fd, uv__get_addr_tag((void *)&loop->backend_fd));
193 #else
194 uv__close(loop->backend_fd);
195 #endif
196 UV_LOGI("close:%{public}zu, backend_fd:%{public}d", (size_t)loop, loop->backend_fd);
197 loop->backend_fd = -1;
198 }
199
200 uv_mutex_lock(&loop->wq_mutex);
201 #ifndef USE_FFRT
202 assert(uv__queue_empty(&loop->wq) && "thread pool work queue not empty!");
203 #endif
204 assert(!uv__has_active_reqs(loop));
205 uv_mutex_unlock(&loop->wq_mutex);
206 uv_mutex_destroy(&loop->wq_mutex);
207
208 /*
209 * Note that all thread pool stuff is finished at this point and
210 * it is safe to just destroy rw lock
211 */
212 uv_rwlock_destroy(&loop->cloexec_lock);
213
214 #if 0
215 assert(uv__queue_empty(&loop->pending_queue));
216 assert(uv__queue_empty(&loop->watcher_queue));
217 assert(loop->nfds == 0);
218 #endif
219
220 uv__free(loop->watchers);
221 loop->watchers = NULL;
222 loop->nwatchers = 0;
223
224 lfields = uv__get_internal_fields(loop);
225 uv_mutex_destroy(&lfields->loop_metrics.lock);
226 uv__free(lfields);
227 loop->internal_fields = NULL;
228 loop->magic = ~UV_LOOP_MAGIC;
229 }
230
231
uv__loop_configure(uv_loop_t * loop,uv_loop_option option,va_list ap)232 int uv__loop_configure(uv_loop_t* loop, uv_loop_option option, va_list ap) {
233 uv__loop_internal_fields_t* lfields;
234
235 lfields = uv__get_internal_fields(loop);
236 if (option == UV_METRICS_IDLE_TIME) {
237 lfields->flags |= UV_METRICS_IDLE_TIME;
238 return 0;
239 }
240
241 if (option != UV_LOOP_BLOCK_SIGNAL)
242 return UV_ENOSYS;
243
244 if (va_arg(ap, int) != SIGPROF)
245 return UV_EINVAL;
246
247 loop->flags |= UV_LOOP_BLOCK_SIGPROF;
248 return 0;
249 }
250