cosmopolitan/libc/calls/sysinfo.c

50 lines
2.7 KiB
C

/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
╞══════════════════════════════════════════════════════════════════════════════╡
│ Copyright 2020 Justine Alexandra Roberts Tunney │
│ │
│ This program is free software; you can redistribute it and/or modify │
│ it under the terms of the GNU General Public License as published by │
│ the Free Software Foundation; version 2 of the License. │
│ │
│ This program is distributed in the hope that it will be useful, but │
│ WITHOUT ANY WARRANTY; without even the implied warranty of │
│ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU │
│ General Public License for more details. │
│ │
│ You should have received a copy of the GNU General Public License │
│ along with this program; if not, write to the Free Software │
│ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA │
│ 02110-1301 USA │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/bits/bits.h"
#include "libc/bits/safemacros.h"
#include "libc/calls/calls.h"
#include "libc/calls/internal.h"
#include "libc/calls/struct/sysinfo.h"
#include "libc/dce.h"
#include "libc/nt/accounting.h"
#include "libc/nt/runtime.h"
#include "libc/nt/struct/memorystatusex.h"
#include "libc/nt/systeminfo.h"
#include "libc/str/str.h"
/**
* Returns amount of system ram, cores, etc.
* @return 0 on success or -1 w/ errno
* @error ENOSYS, EFAULT
*/
int sysinfo(struct sysinfo *info) {
int rc;
memset(info, 0, sizeof(*info));
if (!IsWindows()) {
rc = sysinfo$sysv(info);
} else {
rc = sysinfo$nt(info);
}
info->procs = max(1, info->procs);
info->mem_unit = max(1, info->mem_unit);
info->totalram = max((8 * 1024 * 1024) / info->mem_unit, info->totalram);
return rc;
}