1/* Copyright libuv 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 <string.h>
26#include <sys/process.h>
27#include <sys/neutrino.h>
28#include <sys/memmsg.h>
29#include <sys/syspage.h>
30#include <sys/procfs.h>
31
32static void
33get_mem_info(uint64_t* totalmem, uint64_t* freemem) {
34  mem_info_t msg;
35
36  memset(&msg, 0, sizeof(msg));
37  msg.i.type = _MEM_INFO;
38  msg.i.fd = -1;
39
40  if (MsgSend(MEMMGR_COID, &msg.i, sizeof(msg.i), &msg.o, sizeof(msg.o))
41      != -1) {
42    *totalmem = msg.o.info.__posix_tmi_total;
43    *freemem = msg.o.info.posix_tmi_length;
44  } else {
45    *totalmem = 0;
46    *freemem = 0;
47  }
48}
49
50
51void uv_loadavg(double avg[3]) {
52  avg[0] = 0.0;
53  avg[1] = 0.0;
54  avg[2] = 0.0;
55}
56
57
58int uv_exepath(char* buffer, size_t* size) {
59  char path[PATH_MAX];
60  if (buffer == NULL || size == NULL || *size == 0)
61    return UV_EINVAL;
62
63  realpath(_cmdname(NULL), path);
64  strlcpy(buffer, path, *size);
65  *size = strlen(buffer);
66  return 0;
67}
68
69
70uint64_t uv_get_free_memory(void) {
71  uint64_t totalmem;
72  uint64_t freemem;
73  get_mem_info(&totalmem, &freemem);
74  return freemem;
75}
76
77
78uint64_t uv_get_total_memory(void) {
79  uint64_t totalmem;
80  uint64_t freemem;
81  get_mem_info(&totalmem, &freemem);
82  return totalmem;
83}
84
85
86uint64_t uv_get_constrained_memory(void) {
87  return 0;
88}
89
90
91int uv_resident_set_memory(size_t* rss) {
92  int fd;
93  procfs_asinfo asinfo;
94
95  fd = uv__open_cloexec("/proc/self/ctl", O_RDONLY);
96  if (fd == -1)
97    return UV__ERR(errno);
98
99  if (devctl(fd, DCMD_PROC_ASINFO, &asinfo, sizeof(asinfo), 0) == -1) {
100    uv__close(fd);
101    return UV__ERR(errno);
102  }
103
104  uv__close(fd);
105  *rss = asinfo.rss;
106  return 0;
107}
108
109
110int uv_uptime(double* uptime) {
111  struct qtime_entry* qtime = _SYSPAGE_ENTRY(_syspage_ptr, qtime);
112  *uptime = (qtime->nsec / 1000000000.0);
113  return 0;
114}
115
116
117int uv_cpu_info(uv_cpu_info_t** cpu_infos, int* count) {
118  struct cpuinfo_entry* cpuinfo =
119    (struct cpuinfo_entry*)_SYSPAGE_ENTRY(_syspage_ptr, new_cpuinfo);
120  size_t cpuinfo_size = _SYSPAGE_ELEMENT_SIZE(_syspage_ptr, cpuinfo);
121  struct strings_entry* strings = _SYSPAGE_ENTRY(_syspage_ptr, strings);
122  int num_cpus = _syspage_ptr->num_cpu;
123  int i;
124
125  *count = num_cpus;
126  *cpu_infos = uv__malloc(num_cpus * sizeof(**cpu_infos));
127  if (*cpu_infos == NULL)
128    return UV_ENOMEM;
129
130  for (i = 0; i < num_cpus; i++) {
131    (*cpu_infos)[i].model = strdup(&strings->data[cpuinfo->name]);
132    (*cpu_infos)[i].speed = cpuinfo->speed;
133    SYSPAGE_ARRAY_ADJ_OFFSET(cpuinfo, cpuinfo, cpuinfo_size);
134  }
135
136  return 0;
137}
138