00001 /* 00002 * Copyright (c) 2011 Erin Catto http://box2d.org 00003 * 00004 * This software is provided 'as-is', without any express or implied 00005 * warranty. In no event will the authors be held liable for any damages 00006 * arising from the use of this software. 00007 * Permission is granted to anyone to use this software for any purpose, 00008 * including commercial applications, and to alter it and redistribute it 00009 * freely, subject to the following restrictions: 00010 * 1. The origin of this software must not be misrepresented; you must not 00011 * claim that you wrote the original software. If you use this software 00012 * in a product, an acknowledgment in the product documentation would be 00013 * appreciated but is not required. 00014 * 2. Altered source versions must be plainly marked as such, and must not be 00015 * misrepresented as being the original software. 00016 * 3. This notice may not be removed or altered from any source distribution. 00017 */ 00018 00019 #ifndef B2_TIMER_H 00020 #define B2_TIMER_H 00021 00022 #include <Box2D/Common/b2Settings.h> 00023 00026 class b2Timer 00027 { 00028 public: 00029 00031 b2Timer(); 00032 00034 void Reset(); 00035 00037 float32 GetMilliseconds() const; 00038 00039 private: 00040 00041 #if defined(_WIN32) 00042 float64 m_start; 00043 static float64 s_invFrequency; 00044 #elif defined(__linux__) || defined (__APPLE__) 00045 unsigned long m_start_sec; 00046 unsigned long m_start_usec; 00047 #endif 00048 }; 00049 00050 #endif