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Profiling: measure time on POSIX systems using clock_gettime

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This commit is contained in:
Gabriel Corona
2014-10-18 02:50:02 +02:00
parent 1c41acaddd
commit 641e820257
8 changed files with 86 additions and 35 deletions
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48
Source/Core/Common/PerformanceCounter.cpp Normal file
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// Copyright 2013 Dolphin Emulator Project
// Licensed under GPLv2
// Refer to the license.txt file included.
#if !defined(_WIN32)
#include <cstdint>
#include <ctime>
#include <unistd.h>
#include "Common/CommonTypes.h"
#include "Common/PerformanceCounter.h"
#if defined(_POSIX_TIMERS) && _POSIX_TIMERS > 0
#if defined(_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK>0
#define DOLPHIN_CLOCK CLOCK_MONOTONIC
#else
#define DOLPHIN_CLOCK CLOCK_REALTIME
#endif
#endif
bool QueryPerformanceCounter(u64* out)
{
#if defined(_POSIX_TIMERS) && _POSIX_TIMERS > 0
timespec tp;
if (clock_gettime(DOLPHIN_CLOCK, &tp))
return false;
*out = (u64) tp.tv_nsec + (u64) 1000000000 * (u64) tp.tv_sec;
return true;
#else
*out = 0;
return false;
#endif
}
bool QueryPerformanceFrequency(u64* out)
{
#if defined(_POSIX_TIMERS) && _POSIX_TIMERS > 0
*out = 1000000000;
return true;
#else
*out = 1;
return false;
#endif
}
#endif