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65 lines
2.0 KiB
C++
65 lines
2.0 KiB
C++
/*
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* Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#include "webrtc/system_wrappers/interface/cpu_info.h"
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#if defined(_WIN32)
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#include <Windows.h>
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#elif defined(WEBRTC_MAC)
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#include <sys/sysctl.h>
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#include <sys/types.h>
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#else // defined(WEBRTC_LINUX) or defined(WEBRTC_ANDROID)
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#include <unistd.h>
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#endif
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#include "webrtc/system_wrappers/interface/trace.h"
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namespace webrtc {
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uint32_t CpuInfo::number_of_cores_ = 0;
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uint32_t CpuInfo::DetectNumberOfCores() {
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if (!number_of_cores_) {
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#if defined(_WIN32)
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SYSTEM_INFO si;
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GetSystemInfo(&si);
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number_of_cores_ = static_cast<uint32_t>(si.dwNumberOfProcessors);
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WEBRTC_TRACE(kTraceStateInfo, kTraceUtility, -1,
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"Available number of cores:%d", number_of_cores_);
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#elif defined(WEBRTC_LINUX) || defined(WEBRTC_ANDROID)
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number_of_cores_ = static_cast<uint32_t>(sysconf(_SC_NPROCESSORS_ONLN));
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WEBRTC_TRACE(kTraceStateInfo, kTraceUtility, -1,
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"Available number of cores:%d", number_of_cores_);
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#elif defined(WEBRTC_MAC)
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int name[] = {CTL_HW, HW_AVAILCPU};
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int ncpu;
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size_t size = sizeof(ncpu);
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if (0 == sysctl(name, 2, &ncpu, &size, NULL, 0)) {
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number_of_cores_ = static_cast<uint32_t>(ncpu);
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WEBRTC_TRACE(kTraceStateInfo, kTraceUtility, -1,
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"Available number of cores:%d", number_of_cores_);
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} else {
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WEBRTC_TRACE(kTraceError, kTraceUtility, -1,
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"Failed to get number of cores");
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number_of_cores_ = 1;
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}
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#else
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WEBRTC_TRACE(kTraceWarning, kTraceUtility, -1,
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"No function to get number of cores");
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number_of_cores_ = 1;
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#endif
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}
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return number_of_cores_;
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}
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} // namespace webrtc
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