1 /* 2 * Copyright (c) 2011 The WebRTC project authors. All Rights Reserved. 3 * 4 * Use of this source code is governed by a BSD-style license 5 * that can be found in the LICENSE file in the root of the source 6 * tree. An additional intellectual property rights grant can be found 7 * in the file PATENTS. All contributing project authors may 8 * be found in the AUTHORS file in the root of the source tree. 9 */ 10 11 #include "cpu_info.h" 12 13 #if defined(_WIN32) 14 #include <Windows.h> 15 #elif defined(WEBRTC_MAC) 16 #include <sys/types.h> 17 #include <sys/sysctl.h> 18 #elif defined(WEBRTC_MAC_INTEL) 19 // Intentionally empty 20 #elif defined(WEBRTC_ANDROID) 21 // Not implemented yet, might be possible to use Linux implementation 22 #else // defined(WEBRTC_LINUX) 23 #include <sys/sysinfo.h> 24 #endif 25 26 #include "trace.h" 27 28 namespace webrtc { 29 30 WebRtc_UWord32 CpuInfo::_numberOfCores = 0; 31 32 WebRtc_UWord32 CpuInfo::DetectNumberOfCores() 33 { 34 if (!_numberOfCores) 35 { 36 #if defined(_WIN32) 37 SYSTEM_INFO si; 38 GetSystemInfo(&si); 39 _numberOfCores = static_cast<WebRtc_UWord32>(si.dwNumberOfProcessors); 40 WEBRTC_TRACE(kTraceStateInfo, kTraceUtility, -1, 41 "Available number of cores:%d", _numberOfCores); 42 43 #elif defined(WEBRTC_LINUX) && !defined(WEBRTC_ANDROID) 44 _numberOfCores = get_nprocs(); 45 WEBRTC_TRACE(kTraceStateInfo, kTraceUtility, -1, 46 "Available number of cores:%d", _numberOfCores); 47 48 #elif (defined(WEBRTC_MAC) || defined(WEBRTC_MAC_INTEL)) 49 int name[] = {CTL_HW, HW_AVAILCPU}; 50 int ncpu; 51 size_t size = sizeof(ncpu); 52 if(0 == sysctl(name, 2, &ncpu, &size, NULL, 0)) 53 { 54 _numberOfCores = static_cast<WebRtc_UWord32>(ncpu); 55 WEBRTC_TRACE(kTraceStateInfo, kTraceUtility, -1, 56 "Available number of cores:%d", _numberOfCores); 57 } else 58 { 59 WEBRTC_TRACE(kTraceError, kTraceUtility, -1, 60 "Failed to get number of cores"); 61 _numberOfCores = 1; 62 } 63 #else 64 WEBRTC_TRACE(kTraceWarning, kTraceUtility, -1, 65 "No function to get number of cores"); 66 _numberOfCores = 1; 67 #endif 68 } 69 return _numberOfCores; 70 } 71 72 } // namespace webrtc 73
