/*-*- 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                              │
│                                                                              │
│ Permission to use, copy, modify, and/or distribute this software for         │
│ any purpose with or without fee is hereby granted, provided that the         │
│ above copyright notice and this permission notice appear in all copies.      │
│                                                                              │
│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL                │
│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED                │
│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE             │
│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL         │
│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR        │
│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER               │
│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR             │
│ PERFORMANCE OF THIS SOFTWARE.                                                │
╚─────────────────────────────────────────────────────────────────────────────*/
#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;
}