xref: /third_party/libuv/src/unix/darwin.c (revision e66f31c5) 
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 <assert.h>
25#include <stdint.h>
26#include <errno.h>
27
28#include <dlfcn.h>
29#include <mach/mach.h>
30#include <mach/mach_time.h>
31#include <mach-o/dyld.h> /* _NSGetExecutablePath */
32#include <sys/resource.h>
33#include <sys/sysctl.h>
34#include <unistd.h>  /* sysconf */
35
36static uv_once_t once = UV_ONCE_INIT;
37static uint64_t (*time_func)(void);
38static mach_timebase_info_data_t timebase;
39
40
41int uv__platform_loop_init(uv_loop_t* loop) {
42  loop->cf_state = NULL;
43
44  if (uv__kqueue_init(loop))
45    return UV__ERR(errno);
46
47  return 0;
48}
49
50
51void uv__platform_loop_delete(uv_loop_t* loop) {
52  uv__fsevents_loop_delete(loop);
53}
54
55
56static void uv__hrtime_init_once(void) {
57  if (KERN_SUCCESS != mach_timebase_info(&timebase))
58    abort();
59
60  time_func = (uint64_t (*)(void)) dlsym(RTLD_DEFAULT, "mach_continuous_time");
61  if (time_func == NULL)
62    time_func = mach_absolute_time;
63}
64
65
66uint64_t uv__hrtime(uv_clocktype_t type) {
67  uv_once(&once, uv__hrtime_init_once);
68  return time_func() * timebase.numer / timebase.denom;
69}
70
71
72int uv_exepath(char* buffer, size_t* size) {
73  /* realpath(exepath) may be > PATH_MAX so double it to be on the safe side. */
74  char abspath[PATH_MAX * 2 + 1];
75  char exepath[PATH_MAX + 1];
76  uint32_t exepath_size;
77  size_t abspath_size;
78
79  if (buffer == NULL || size == NULL || *size == 0)
80    return UV_EINVAL;
81
82  exepath_size = sizeof(exepath);
83  if (_NSGetExecutablePath(exepath, &exepath_size))
84    return UV_EIO;
85
86  if (realpath(exepath, abspath) != abspath)
87    return UV__ERR(errno);
88
89  abspath_size = strlen(abspath);
90  if (abspath_size == 0)
91    return UV_EIO;
92
93  *size -= 1;
94  if (*size > abspath_size)
95    *size = abspath_size;
96
97  memcpy(buffer, abspath, *size);
98  buffer[*size] = '\0';
99
100  return 0;
101}
102
103
104uint64_t uv_get_free_memory(void) {
105  vm_statistics_data_t info;
106  mach_msg_type_number_t count = sizeof(info) / sizeof(integer_t);
107
108  if (host_statistics(mach_host_self(), HOST_VM_INFO,
109                      (host_info_t)&info, &count) != KERN_SUCCESS) {
110    return 0;
111  }
112
113  return (uint64_t) info.free_count * sysconf(_SC_PAGESIZE);
114}
115
116
117uint64_t uv_get_total_memory(void) {
118  uint64_t info;
119  int which[] = {CTL_HW, HW_MEMSIZE};
120  size_t size = sizeof(info);
121
122  if (sysctl(which, ARRAY_SIZE(which), &info, &size, NULL, 0))
123    return 0;
124
125  return (uint64_t) info;
126}
127
128
129uint64_t uv_get_constrained_memory(void) {
130  return 0;  /* Memory constraints are unknown. */
131}
132
133
134uint64_t uv_get_available_memory(void) {
135  return uv_get_free_memory();
136}
137
138
139void uv_loadavg(double avg[3]) {
140  struct loadavg info;
141  size_t size = sizeof(info);
142  int which[] = {CTL_VM, VM_LOADAVG};
143
144  if (sysctl(which, ARRAY_SIZE(which), &info, &size, NULL, 0) < 0) return;
145
146  avg[0] = (double) info.ldavg[0] / info.fscale;
147  avg[1] = (double) info.ldavg[1] / info.fscale;
148  avg[2] = (double) info.ldavg[2] / info.fscale;
149}
150
151
152int uv_resident_set_memory(size_t* rss) {
153  mach_msg_type_number_t count;
154  task_basic_info_data_t info;
155  kern_return_t err;
156
157  count = TASK_BASIC_INFO_COUNT;
158  err = task_info(mach_task_self(),
159                  TASK_BASIC_INFO,
160                  (task_info_t) &info,
161                  &count);
162  (void) &err;
163  /* task_info(TASK_BASIC_INFO) cannot really fail. Anything other than
164   * KERN_SUCCESS implies a libuv bug.
165   */
166  assert(err == KERN_SUCCESS);
167  *rss = info.resident_size;
168
169  return 0;
170}
171
172
173int uv_uptime(double* uptime) {
174  time_t now;
175  struct timeval info;
176  size_t size = sizeof(info);
177  static int which[] = {CTL_KERN, KERN_BOOTTIME};
178
179  if (sysctl(which, ARRAY_SIZE(which), &info, &size, NULL, 0))
180    return UV__ERR(errno);
181
182  now = time(NULL);
183  *uptime = now - info.tv_sec;
184
185  return 0;
186}
187
188int uv_cpu_info(uv_cpu_info_t** cpu_infos, int* count) {
189  unsigned int ticks = (unsigned int)sysconf(_SC_CLK_TCK),
190               multiplier = ((uint64_t)1000L / ticks);
191  char model[512];
192  uint64_t cpuspeed;
193  size_t size;
194  unsigned int i;
195  natural_t numcpus;
196  mach_msg_type_number_t msg_type;
197  processor_cpu_load_info_data_t *info;
198  uv_cpu_info_t* cpu_info;
199
200  size = sizeof(model);
201  if (sysctlbyname("machdep.cpu.brand_string", &model, &size, NULL, 0) &&
202      sysctlbyname("hw.model", &model, &size, NULL, 0)) {
203    return UV__ERR(errno);
204  }
205
206  cpuspeed = 0;
207  size = sizeof(cpuspeed);
208  sysctlbyname("hw.cpufrequency", &cpuspeed, &size, NULL, 0);
209  if (cpuspeed == 0)
210    /* If sysctl hw.cputype == CPU_TYPE_ARM64, the correct value is unavailable
211     * from Apple, but we can hard-code it here to a plausible value. */
212    cpuspeed = 2400000000U;
213
214  if (host_processor_info(mach_host_self(), PROCESSOR_CPU_LOAD_INFO, &numcpus,
215                          (processor_info_array_t*)&info,
216                          &msg_type) != KERN_SUCCESS) {
217    return UV_EINVAL;  /* FIXME(bnoordhuis) Translate error. */
218  }
219
220  *cpu_infos = uv__malloc(numcpus * sizeof(**cpu_infos));
221  if (!(*cpu_infos)) {
222    vm_deallocate(mach_task_self(), (vm_address_t)info, msg_type);
223    return UV_ENOMEM;
224  }
225
226  *count = numcpus;
227
228  for (i = 0; i < numcpus; i++) {
229    cpu_info = &(*cpu_infos)[i];
230
231    cpu_info->cpu_times.user = (uint64_t)(info[i].cpu_ticks[0]) * multiplier;
232    cpu_info->cpu_times.nice = (uint64_t)(info[i].cpu_ticks[3]) * multiplier;
233    cpu_info->cpu_times.sys = (uint64_t)(info[i].cpu_ticks[1]) * multiplier;
234    cpu_info->cpu_times.idle = (uint64_t)(info[i].cpu_ticks[2]) * multiplier;
235    cpu_info->cpu_times.irq = 0;
236
237    cpu_info->model = uv__strdup(model);
238    cpu_info->speed = (int)(cpuspeed / 1000000);
239  }
240  vm_deallocate(mach_task_self(), (vm_address_t)info, msg_type);
241
242  return 0;
243}
244