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1 /* Copyright libuv project contributors. All rights reserved.
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2 *
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3 * Permission is hereby granted, free of charge, to any person obtaining a copy
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4 * of this software and associated documentation files (the "Software"), to
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5 * deal in the Software without restriction, including without limitation the
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6 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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7 * sell copies of the Software, and to permit persons to whom the Software is
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8 * furnished to do so, subject to the following conditions:
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9 *
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10 * The above copyright notice and this permission notice shall be included in
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11 * all copies or substantial portions of the Software.
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12 *
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13 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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14 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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15 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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16 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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17 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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18 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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19 * IN THE SOFTWARE.
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20 */
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21
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22 #define _GNU_SOURCE 1
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23
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24 #include "uv.h"
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25 #include "internal.h"
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26
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27 #include <hurd.h>
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28 #include <hurd/process.h>
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29 #include <mach/task_info.h>
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30 #include <mach/vm_statistics.h>
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31 #include <mach/vm_param.h>
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32
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33 #include <inttypes.h>
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34 #include <stddef.h>
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35 #include <unistd.h>
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36 #include <string.h>
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37 #include <limits.h>
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38
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39 int uv_exepath(char* buffer, size_t* size) {
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40 kern_return_t err;
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41 /* XXX in current Hurd, strings are char arrays of 1024 elements */
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42 string_t exepath;
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43 ssize_t copied;
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44
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45 if (buffer == NULL || size == NULL || *size == 0)
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46 return UV_EINVAL;
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47
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48 if (*size - 1 > 0) {
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49 /* XXX limited length of buffer in current Hurd, this API will probably
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50 * evolve in the future */
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51 err = proc_get_exe(getproc(), getpid(), exepath);
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52
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53 if (err)
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54 return UV__ERR(err);
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55 }
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56
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57 copied = uv__strscpy(buffer, exepath, *size);
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58
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59 /* do not return error on UV_E2BIG failure */
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60 *size = copied < 0 ? strlen(buffer) : (size_t) copied;
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61
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62 return 0;
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63 }
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64
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65 int uv_resident_set_memory(size_t* rss) {
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66 kern_return_t err;
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67 struct task_basic_info bi;
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68 mach_msg_type_number_t count;
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69
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70 count = TASK_BASIC_INFO_COUNT;
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71 err = task_info(mach_task_self(), TASK_BASIC_INFO,
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72 (task_info_t) &bi, &count);
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73
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74 if (err)
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75 return UV__ERR(err);
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76
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77 *rss = bi.resident_size;
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78
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79 return 0;
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80 }
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81
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82 uint64_t uv_get_free_memory(void) {
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83 kern_return_t err;
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84 struct vm_statistics vmstats;
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85
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86 err = vm_statistics(mach_task_self(), &vmstats);
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87
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88 if (err)
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89 return 0;
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90
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91 return vmstats.free_count * vm_page_size;
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92 }
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93
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94
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95 uint64_t uv_get_total_memory(void) {
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96 kern_return_t err;
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97 host_basic_info_data_t hbi;
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98 mach_msg_type_number_t cnt;
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99
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100 cnt = HOST_BASIC_INFO_COUNT;
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101 err = host_info(mach_host_self(), HOST_BASIC_INFO, (host_info_t) &hbi, &cnt);
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102
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103 if (err)
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104 return 0;
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105
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106 return hbi.memory_size;
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107 }
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108
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109
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110 int uv_uptime(double* uptime) {
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111 char buf[128];
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112
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113 /* Try /proc/uptime first */
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114 if (0 == uv__slurp("/proc/uptime", buf, sizeof(buf)))
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115 if (1 == sscanf(buf, "%lf", uptime))
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116 return 0;
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117
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118 /* Reimplement here code from procfs to calculate uptime if not mounted? */
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119
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120 return UV__ERR(EIO);
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121 }
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122
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123 void uv_loadavg(double avg[3]) {
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124 char buf[128]; /* Large enough to hold all of /proc/loadavg. */
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125
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126 if (0 == uv__slurp("/proc/loadavg", buf, sizeof(buf)))
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127 if (3 == sscanf(buf, "%lf %lf %lf", &avg[0], &avg[1], &avg[2]))
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128 return;
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129
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130 /* Reimplement here code from procfs to calculate loadavg if not mounted? */
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131 }
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132
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133
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134 int uv_cpu_info(uv_cpu_info_t** cpu_infos, int* count) {
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135 kern_return_t err;
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136 host_basic_info_data_t hbi;
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137 mach_msg_type_number_t cnt;
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138
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139 /* Get count of cpus */
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140 cnt = HOST_BASIC_INFO_COUNT;
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141 err = host_info(mach_host_self(), HOST_BASIC_INFO, (host_info_t) &hbi, &cnt);
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142
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143 if (err) {
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144 err = UV__ERR(err);
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145 goto abort;
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146 }
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147
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148 /* XXX not implemented on the Hurd */
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149 *cpu_infos = uv__calloc(hbi.avail_cpus, sizeof(**cpu_infos));
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150 if (*cpu_infos == NULL) {
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151 err = UV_ENOMEM;
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152 goto abort;
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153 }
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154
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155 *count = hbi.avail_cpus;
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156
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157 return 0;
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158
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159 abort:
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160 *cpu_infos = NULL;
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161 *count = 0;
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162 return err;
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163 }
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164
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165 uint64_t uv_get_constrained_memory(void) {
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166 return 0; /* Memory constraints are unknown. */
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167 }
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168
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169
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170 uint64_t uv_get_available_memory(void) {
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171 return uv_get_free_memory();
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172 }
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