mirror of https://github.com/axmolengine/axmol.git
102 lines
2.2 KiB
C++
102 lines
2.2 KiB
C++
/*
|
|
* Copyright (c) 2011 Erin Catto http://box2d.org
|
|
*
|
|
* This software is provided 'as-is', without any express or implied
|
|
* warranty. In no event will the authors be held liable for any damages
|
|
* arising from the use of this software.
|
|
* Permission is granted to anyone to use this software for any purpose,
|
|
* including commercial applications, and to alter it and redistribute it
|
|
* freely, subject to the following restrictions:
|
|
* 1. The origin of this software must not be misrepresented; you must not
|
|
* claim that you wrote the original software. If you use this software
|
|
* in a product, an acknowledgment in the product documentation would be
|
|
* appreciated but is not required.
|
|
* 2. Altered source versions must be plainly marked as such, and must not be
|
|
* misrepresented as being the original software.
|
|
* 3. This notice may not be removed or altered from any source distribution.
|
|
*/
|
|
|
|
#include <Box2D/Common/b2Timer.h>
|
|
|
|
#if defined(_WIN32)
|
|
|
|
float64 b2Timer::s_invFrequency = 0.0f;
|
|
|
|
#define WIN32_LEAN_AND_MEAN
|
|
#include <windows.h>
|
|
|
|
b2Timer::b2Timer()
|
|
{
|
|
LARGE_INTEGER largeInteger;
|
|
|
|
if (s_invFrequency == 0.0f)
|
|
{
|
|
QueryPerformanceFrequency(&largeInteger);
|
|
s_invFrequency = float64(largeInteger.QuadPart);
|
|
if (s_invFrequency > 0.0f)
|
|
{
|
|
s_invFrequency = 1000.0f / s_invFrequency;
|
|
}
|
|
}
|
|
|
|
QueryPerformanceCounter(&largeInteger);
|
|
m_start = float64(largeInteger.QuadPart);
|
|
}
|
|
|
|
void b2Timer::Reset()
|
|
{
|
|
LARGE_INTEGER largeInteger;
|
|
QueryPerformanceCounter(&largeInteger);
|
|
m_start = float64(largeInteger.QuadPart);
|
|
}
|
|
|
|
float32 b2Timer::GetMilliseconds() const
|
|
{
|
|
LARGE_INTEGER largeInteger;
|
|
QueryPerformanceCounter(&largeInteger);
|
|
float64 count = float64(largeInteger.QuadPart);
|
|
float32 ms = float32(s_invFrequency * (count - m_start));
|
|
return ms;
|
|
}
|
|
|
|
#elif defined(__linux__) || defined (__APPLE__)
|
|
|
|
#include <sys/time.h>
|
|
|
|
b2Timer::b2Timer()
|
|
{
|
|
Reset();
|
|
}
|
|
|
|
void b2Timer::Reset()
|
|
{
|
|
timeval t;
|
|
gettimeofday(&t, 0);
|
|
m_start_sec = t.tv_sec;
|
|
m_start_usec = t.tv_usec;
|
|
}
|
|
|
|
float32 b2Timer::GetMilliseconds() const
|
|
{
|
|
timeval t;
|
|
gettimeofday(&t, 0);
|
|
return 1000.0f * (t.tv_sec - m_start_sec) + 0.001f * (t.tv_usec - m_start_usec);
|
|
}
|
|
|
|
#else
|
|
|
|
b2Timer::b2Timer()
|
|
{
|
|
}
|
|
|
|
void b2Timer::Reset()
|
|
{
|
|
}
|
|
|
|
float32 b2Timer::GetMilliseconds() const
|
|
{
|
|
return 0.0f;
|
|
}
|
|
|
|
#endif
|