76 lines
1.6 KiB
C++
76 lines
1.6 KiB
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 <sys/param.h>
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#include <sys/shm.h>
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#include <sys/sysctl.h>
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#include "base/logging.h"
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namespace {
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int64 AmountOfMemory(int pages_name) {
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long pages = sysconf(pages_name);
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long page_size = sysconf(_SC_PAGESIZE);
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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>(pages) * page_size;
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}
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} // namespace
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namespace base {
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// static
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int SysInfo::NumberOfProcessors() {
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int mib[] = { CTL_HW, HW_NCPU };
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int ncpu;
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size_t size = sizeof(ncpu);
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if (sysctl(mib, arraysize(mib), &ncpu, &size, NULL, 0) < 0) {
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NOTREACHED();
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return 1;
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}
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return ncpu;
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}
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// static
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int64 SysInfo::AmountOfPhysicalMemory() {
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return AmountOfMemory(_SC_PHYS_PAGES);
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}
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// static
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int64 SysInfo::AmountOfAvailablePhysicalMemory() {
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return AmountOfMemory(_SC_AVPHYS_PAGES);
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}
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// static
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size_t SysInfo::MaxSharedMemorySize() {
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int mib[] = { CTL_KERN, KERN_SHMINFO, KERN_SHMINFO_SHMMAX };
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size_t limit;
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size_t size = sizeof(limit);
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if (sysctl(mib, arraysize(mib), &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 limit;
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}
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// static
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std::string SysInfo::CPUModelName() {
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int mib[] = { CTL_HW, HW_MODEL };
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char name[256];
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size_t len = arraysize(name);
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if (sysctl(mib, arraysize(mib), name, &len, NULL, 0) < 0) {
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NOTREACHED();
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return std::string();
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}
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return name;
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}
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} // namespace base
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