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