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[ThirdParty] Added libuv
author June Park <parkjune1995@gmail.com>
date Wed, 14 Jan 2026 19:39:52 -0800
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159:05cf9467a1c3 160:948de3f54cea
1 /* Copyright Joyent, Inc. and other Node contributors. All rights reserved.
2 * Permission is hereby granted, free of charge, to any person obtaining a copy
3 * of this software and associated documentation files (the "Software"), to
4 * deal in the Software without restriction, including without limitation the
5 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
6 * sell copies of the Software, and to permit persons to whom the Software is
7 * furnished to do so, subject to the following conditions:
8 *
9 * The above copyright notice and this permission notice shall be included in
10 * all copies or substantial portions of the Software.
11 *
12 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
13 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
14 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
15 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
16 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
17 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
18 * IN THE SOFTWARE.
19 */
20
21 #include "uv.h"
22 #include "internal.h"
23
24 #include <sys/types.h>
25 #include <sys/param.h>
26 #include <sys/resource.h>
27 #include <sys/sched.h>
28 #include <sys/time.h>
29 #include <sys/sysctl.h>
30
31 #include <errno.h>
32 #include <fcntl.h>
33 #include <paths.h>
34 #include <stdlib.h>
35 #include <string.h>
36 #include <unistd.h>
37
38
39 int uv__platform_loop_init(uv_loop_t* loop) {
40 return uv__kqueue_init(loop);
41 }
42
43
44 void uv__platform_loop_delete(uv_loop_t* loop) {
45 }
46
47
48 void uv_loadavg(double avg[3]) {
49 struct loadavg info;
50 size_t size = sizeof(info);
51 int which[] = {CTL_VM, VM_LOADAVG};
52
53 if (sysctl(which, ARRAY_SIZE(which), &info, &size, NULL, 0) < 0) return;
54
55 avg[0] = (double) info.ldavg[0] / info.fscale;
56 avg[1] = (double) info.ldavg[1] / info.fscale;
57 avg[2] = (double) info.ldavg[2] / info.fscale;
58 }
59
60
61 int uv_exepath(char* buffer, size_t* size) {
62 int mib[4];
63 char **argsbuf = NULL;
64 size_t argsbuf_size = 100U;
65 size_t exepath_size;
66 pid_t mypid;
67 int err;
68
69 if (buffer == NULL || size == NULL || *size == 0)
70 return UV_EINVAL;
71
72 mypid = getpid();
73 for (;;) {
74 err = UV_ENOMEM;
75 argsbuf = uv__reallocf(argsbuf, argsbuf_size);
76 if (argsbuf == NULL)
77 goto out;
78 mib[0] = CTL_KERN;
79 mib[1] = KERN_PROC_ARGS;
80 mib[2] = mypid;
81 mib[3] = KERN_PROC_ARGV;
82 if (sysctl(mib, ARRAY_SIZE(mib), argsbuf, &argsbuf_size, NULL, 0) == 0) {
83 break;
84 }
85 if (errno != ENOMEM) {
86 err = UV__ERR(errno);
87 goto out;
88 }
89 argsbuf_size *= 2U;
90 }
91
92 if (argsbuf[0] == NULL) {
93 err = UV_EINVAL; /* FIXME(bnoordhuis) More appropriate error. */
94 goto out;
95 }
96
97 *size -= 1;
98 exepath_size = strlen(argsbuf[0]);
99 if (*size > exepath_size)
100 *size = exepath_size;
101
102 memcpy(buffer, argsbuf[0], *size);
103 buffer[*size] = '\0';
104 err = 0;
105
106 out:
107 uv__free(argsbuf);
108
109 return err;
110 }
111
112
113 uint64_t uv_get_free_memory(void) {
114 struct uvmexp info;
115 size_t size = sizeof(info);
116 int which[] = {CTL_VM, VM_UVMEXP};
117
118 if (sysctl(which, ARRAY_SIZE(which), &info, &size, NULL, 0))
119 return 0;
120
121 return (uint64_t) info.free * sysconf(_SC_PAGESIZE);
122 }
123
124
125 uint64_t uv_get_total_memory(void) {
126 uint64_t info;
127 int which[] = {CTL_HW, HW_PHYSMEM64};
128 size_t size = sizeof(info);
129
130 if (sysctl(which, ARRAY_SIZE(which), &info, &size, NULL, 0))
131 return 0;
132
133 return (uint64_t) info;
134 }
135
136
137 uint64_t uv_get_constrained_memory(void) {
138 return 0; /* Memory constraints are unknown. */
139 }
140
141
142 uint64_t uv_get_available_memory(void) {
143 return uv_get_free_memory();
144 }
145
146
147 int uv_resident_set_memory(size_t* rss) {
148 struct kinfo_proc kinfo;
149 size_t page_size = getpagesize();
150 size_t size = sizeof(struct kinfo_proc);
151 int mib[6];
152
153 mib[0] = CTL_KERN;
154 mib[1] = KERN_PROC;
155 mib[2] = KERN_PROC_PID;
156 mib[3] = getpid();
157 mib[4] = sizeof(struct kinfo_proc);
158 mib[5] = 1;
159
160 if (sysctl(mib, ARRAY_SIZE(mib), &kinfo, &size, NULL, 0) < 0)
161 return UV__ERR(errno);
162
163 *rss = kinfo.p_vm_rssize * page_size;
164 return 0;
165 }
166
167
168 int uv_uptime(double* uptime) {
169 time_t now;
170 struct timeval info;
171 size_t size = sizeof(info);
172 static int which[] = {CTL_KERN, KERN_BOOTTIME};
173
174 if (sysctl(which, ARRAY_SIZE(which), &info, &size, NULL, 0))
175 return UV__ERR(errno);
176
177 now = time(NULL);
178
179 *uptime = (double)(now - info.tv_sec);
180 return 0;
181 }
182
183
184 int uv_cpu_info(uv_cpu_info_t** cpu_infos, int* count) {
185 unsigned int ticks = (unsigned int)sysconf(_SC_CLK_TCK),
186 multiplier = ((uint64_t)1000L / ticks), cpuspeed;
187 uint64_t info[CPUSTATES];
188 char model[512];
189 int numcpus = 1;
190 int which[] = {CTL_HW,HW_MODEL};
191 int percpu[] = {CTL_KERN,KERN_CPTIME2,0};
192 size_t size;
193 int i, j;
194 uv_cpu_info_t* cpu_info;
195
196 size = sizeof(model);
197 if (sysctl(which, ARRAY_SIZE(which), &model, &size, NULL, 0))
198 return UV__ERR(errno);
199
200 which[1] = HW_NCPUONLINE;
201 size = sizeof(numcpus);
202 if (sysctl(which, ARRAY_SIZE(which), &numcpus, &size, NULL, 0))
203 return UV__ERR(errno);
204
205 *cpu_infos = uv__malloc(numcpus * sizeof(**cpu_infos));
206 if (!(*cpu_infos))
207 return UV_ENOMEM;
208
209 i = 0;
210 *count = numcpus;
211
212 which[1] = HW_CPUSPEED;
213 size = sizeof(cpuspeed);
214 cpuspeed = 0;
215 /*
216 * HW_CPUSPEED can return EOPNOTSUPP if cpuspeed is 0,
217 * so ignore that and continue the flow, because we
218 * still care about the rest of the CPU info.
219 */
220 if (sysctl(which, ARRAY_SIZE(which), &cpuspeed, &size, NULL, 0) &&
221 (errno != EOPNOTSUPP)) {
222 goto error;
223 }
224
225 size = sizeof(info);
226 for (i = 0; i < numcpus; i++) {
227 percpu[2] = i;
228 if (sysctl(percpu, ARRAY_SIZE(percpu), &info, &size, NULL, 0))
229 goto error;
230
231 cpu_info = &(*cpu_infos)[i];
232
233 cpu_info->cpu_times.user = (uint64_t)(info[CP_USER]) * multiplier;
234 cpu_info->cpu_times.nice = (uint64_t)(info[CP_NICE]) * multiplier;
235 cpu_info->cpu_times.sys = (uint64_t)(info[CP_SYS]) * multiplier;
236 cpu_info->cpu_times.idle = (uint64_t)(info[CP_IDLE]) * multiplier;
237 cpu_info->cpu_times.irq = (uint64_t)(info[CP_INTR]) * multiplier;
238
239 cpu_info->model = uv__strdup(model);
240 cpu_info->speed = cpuspeed;
241 }
242
243 return 0;
244
245 error:
246 *count = 0;
247 for (j = 0; j < i; j++)
248 uv__free((*cpu_infos)[j].model);
249
250 uv__free(*cpu_infos);
251 *cpu_infos = NULL;
252 return UV__ERR(errno);
253 }