mirror of
https://github.com/jart/cosmopolitan.git
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114 lines
4.1 KiB
C
114 lines
4.1 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│ vi: set et ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi │
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2020 Justine Alexandra Roberts Tunney │
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│ │
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│ Permission to use, copy, modify, and/or distribute this software for │
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│ any purpose with or without fee is hereby granted, provided that the │
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│ above copyright notice and this permission notice appear in all copies. │
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│ │
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│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
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│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
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│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
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│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
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│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
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│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
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│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
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│ PERFORMANCE OF THIS SOFTWARE. │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/calls/struct/sysinfo.h"
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#include "libc/calls/calls.h"
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#include "libc/calls/struct/sysinfo.internal.h"
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#include "libc/calls/struct/timespec.h"
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#include "libc/calls/struct/timeval.h"
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#include "libc/dce.h"
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#include "libc/intrin/asan.internal.h"
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#include "libc/intrin/strace.internal.h"
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#include "libc/macros.internal.h"
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#include "libc/str/str.h"
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#include "libc/sysv/errfuns.h"
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#define CTL_KERN 1
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#define CTL_VM 2
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#define CTL_HW 6
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#define VM_LOADAVG 2
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#define KERN_BOOTTIME 21
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#define HW_PHYSMEM (IsXnu() ? 24 : 5)
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struct loadavg {
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uint32_t ldavg[3];
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int64_t fscale;
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};
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static int64_t GetUptime(void) {
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if (IsNetbsd())
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return 0; // TODO(jart): Why?
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struct timeval x;
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size_t n = sizeof(x);
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int mib[] = {CTL_KERN, KERN_BOOTTIME};
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if (sysctl(mib, ARRAYLEN(mib), &x, &n, 0, 0) == -1)
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return 0;
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return timespec_real().tv_sec - x.tv_sec;
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}
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static int64_t GetPhysmem(void) {
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uint64_t x = 0;
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size_t n = sizeof(x);
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int mib[] = {CTL_HW, HW_PHYSMEM};
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if (sysctl(mib, ARRAYLEN(mib), &x, &n, 0, 0) == -1)
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return 0;
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return x;
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}
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static void GetLoads(uint64_t loads[3]) {
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size_t size;
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struct loadavg loadinfo;
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int mib[2] = {CTL_VM, VM_LOADAVG};
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size = sizeof(loadinfo);
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if (sysctl(mib, 2, &loadinfo, &size, 0, 0) != -1) {
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for (int i = 0; i < 3; i++) {
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loads[i] = (double)loadinfo.ldavg[i] / loadinfo.fscale * 65536;
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}
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}
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}
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static int sys_sysinfo_bsd(struct sysinfo *info) {
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GetLoads(info->loads);
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info->uptime = GetUptime();
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info->totalram = GetPhysmem();
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info->bufferram = GetPhysmem();
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info->mem_unit = 1;
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return 0;
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}
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/**
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* Returns amount of system ram, cores, etc.
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*
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* Only the `totalram` field is supported on all platforms right now.
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* Support is best on Linux. Fields will be set to zero when they're not
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* known.
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*
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* @return 0 on success or -1 w/ errno
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* @error EFAULT
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*/
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int sysinfo(struct sysinfo *info) {
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int rc;
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struct sysinfo x = {0};
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if (IsAsan() && info && !__asan_is_valid(info, sizeof(*info))) {
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rc = efault();
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} else if (!IsWindows()) {
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if (IsLinux()) {
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rc = sys_sysinfo(&x);
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} else {
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rc = sys_sysinfo_bsd(&x);
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}
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} else {
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rc = sys_sysinfo_nt(&x);
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}
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if (rc != -1) {
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memcpy(info, &x, sizeof(x));
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}
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STRACE("sysinfo(%p) → %d% m", info, rc);
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return rc;
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}
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