39 lines
953 B
C++
39 lines
953 B
C++
|
// Copyright (c) 2011 The Chromium Authors. All rights reserved.
|
||
|
|
// Use of this source code is governed by a BSD-style license that can be
|
||
|
|
// found in the LICENSE file.
|
||
|
|
|
||
|
|
#include "base/system/sys_info.h"
|
||
|
|
|
||
|
|
#include <stddef.h>
|
||
|
|
#include <stdint.h>
|
||
|
|
#include <sys/sysctl.h>
|
||
|
|
|
||
|
|
#include "base/logging.h"
|
||
|
|
|
||
|
|
namespace base {
|
||
|
|
|
||
|
|
int64_t SysInfo::AmountOfPhysicalMemoryImpl() {
|
||
|
|
int pages, page_size;
|
||
|
|
size_t size = sizeof(pages);
|
||
|
|
sysctlbyname("vm.stats.vm.v_page_count", &pages, &size, NULL, 0);
|
||
|
|
sysctlbyname("vm.stats.vm.v_page_size", &page_size, &size, NULL, 0);
|
||
|
|
if (pages == -1 || page_size == -1) {
|
||
|
|
NOTREACHED();
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
return static_cast<int64_t>(pages) * page_size;
|
||
|
|
}
|
||
|
|
|
||
|
|
// static
|
||
|
|
uint64_t SysInfo::MaxSharedMemorySize() {
|
||
|
|
size_t limit;
|
||
|
|
size_t size = sizeof(limit);
|
||
|
|
if (sysctlbyname("kern.ipc.shmmax", &limit, &size, NULL, 0) < 0) {
|
||
|
|
NOTREACHED();
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
return static_cast<uint64_t>(limit);
|
||
|
|
}
|
||
|
|
|
||
|
|
} // namespace base
|