1 /* Copyright libuv project 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 "internal.h"
24
25 #include <sys/sysinfo.h>
26 #include <unistd.h>
27
uv_uptime(double * uptime)28 int uv_uptime(double* uptime) {
29 struct sysinfo info;
30
31 if (sysinfo(&info) < 0)
32 return UV__ERR(errno);
33
34 *uptime = info.uptime;
35 return 0;
36 }
37
uv_resident_set_memory(size_t * rss)38 int uv_resident_set_memory(size_t* rss) {
39 char buf[1024];
40 const char* s;
41 long val;
42 int rc;
43 int i;
44 struct sysinfo si;
45
46 /* rss: 24th element */
47 rc = uv__slurp("/proc/self/stat", buf, sizeof(buf));
48 if (rc < 0)
49 return rc;
50
51 /* find the last ')' */
52 s = strrchr(buf, ')');
53 if (s == NULL)
54 goto err;
55
56 for (i = 1; i <= 22; i++) {
57 s = strchr(s + 1, ' ');
58 if (s == NULL)
59 goto err;
60 }
61
62 errno = 0;
63 val = strtol(s, NULL, 10);
64 if (val < 0 || errno != 0)
65 goto err;
66
67 do
68 rc = sysinfo(&si);
69 while (rc == -1 && errno == EINTR);
70 if (rc == -1)
71 return UV__ERR(errno);
72
73 *rss = val * si.mem_unit;
74 return 0;
75
76 err:
77 return UV_EINVAL;
78 }
79
uv_cpu_info(uv_cpu_info_t ** cpu_infos,int * count)80 int uv_cpu_info(uv_cpu_info_t** cpu_infos, int* count) {
81 /* FIXME: read /proc/stat? */
82 *cpu_infos = NULL;
83 *count = 0;
84 return UV_ENOSYS;
85 }
86
uv_get_constrained_memory(void)87 uint64_t uv_get_constrained_memory(void) {
88 return 0; /* Memory constraints are unknown. */
89 }
90
uv_get_available_memory(void)91 uint64_t uv_get_available_memory(void) {
92 return uv_get_free_memory();
93 }
94
