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 #ifndef WEBRTC_SYSTEM_WRAPPERS_INTERFACE_CPU_WRAPPER_H_ 12 #define WEBRTC_SYSTEM_WRAPPERS_INTERFACE_CPU_WRAPPER_H_ 13 14 #include "typedefs.h" 15 16 namespace webrtc { 17 class CpuWrapper 18 { 19 public: 20 static CpuWrapper* CreateCpu(); 21 virtual ~CpuWrapper() {} 22 23 // Returns the average CPU usage for all processors. The CPU usage can be 24 // between and including 0 to 100 (%) 25 virtual WebRtc_Word32 CpuUsage() = 0; 26 virtual WebRtc_Word32 CpuUsage(WebRtc_Word8* processName, 27 WebRtc_UWord32 length) = 0; 28 virtual WebRtc_Word32 CpuUsage(WebRtc_UWord32 dwProcessID) = 0; 29 30 // The CPU usage per core is returned in cpu_usage. The CPU can be between 31 // and including 0 to 100 (%) 32 // Note that the pointer passed as cpu_usage is redirected to a local member 33 // of the CPU wrapper. 34 // numCores is the number of cores in the cpu_usage array. 35 // The return value is -1 for failure or 0-100, indicating the average 36 // CPU usage across all cores. 37 // Note: on some OSs this class is initialized lazy. This means that it 38 // might not yet be possible to retrieve any CPU metrics. When this happens 39 // the return value will be zero (indicating that there is not a failure), 40 // numCores will be 0 and cpu_usage will be set to NULL (indicating that 41 // no metrics are available yet). Once the initialization is completed, 42 // which can take in the order of seconds, CPU metrics can be retrieved. 43 virtual WebRtc_Word32 CpuUsageMultiCore(WebRtc_UWord32& numCores, 44 WebRtc_UWord32*& cpu_usage) = 0; 45 46 virtual void Reset() = 0; 47 virtual void Stop() = 0; 48 49 protected: 50 CpuWrapper() {} 51 }; 52 } // namespace webrtc 53 #endif // WEBRTC_SYSTEM_WRAPPERS_INTERFACE_CPU_WRAPPER_H_ 54
