1 /* 2 * Copyright 2011, The Android Open Source Project 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * * Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * * Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY 14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR 17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY 21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26 #ifndef PerformanceMonitor_h 27 #define PerformanceMonitor_h 28 29 #include "config.h" 30 31 #include <wtf/HashMap.h> 32 #include <wtf/text/StringHash.h> 33 #include <sys/time.h> 34 #include <unistd.h> 35 36 namespace WebCore { 37 38 struct PerfItem { PerfItemPerfItem39 PerfItem() : average_ms(0), start_time() {} 40 float average_ms; 41 struct timeval start_time; 42 }; 43 44 class PerformanceMonitor { 45 public: 46 PerformanceMonitor(); 47 virtual ~PerformanceMonitor(); 48 void start(const String &tag); 49 void stop(const String &tag); 50 float getAverageDuration(const String &tag); 51 52 private: 53 HashMap<String, PerfItem*, StringHash> m_tags; 54 }; 55 56 } 57 58 #endif // PerformanceMonitor_h 59