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/*---------------------------------------------------------------------------*
* pcputimer.c *
* *
* Copyright 2007, 2008 Nuance Communciations, Inc. *
* *
* Licensed under the Apache License, Version 2.0 (the 'License'); *
* you may not use this file except in compliance with the License. *
* *
* You may obtain a copy of the License at *
* http://www.apache.org/licenses/LICENSE-2.0 *
* *
* Unless required by applicable law or agreed to in writing, software *
* distributed under the License is distributed on an 'AS IS' BASIS, *
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. *
* See the License for the specific language governing permissions and *
* limitations under the License. *
* *
*---------------------------------------------------------------------------*/
#include "pcputimer.h"
#include "pmemory.h"
#if defined(_WIN32)
/*
Note that this implementation assumes that GetThreadTimes is
available (requires NT 3.5 and above) and that 64 bit arithmetic is
available (requires VC)
*/
struct PCPUTimer_t
{
HANDLE hThread;
LARGE_INTEGER RefTime;
asr_uint32_t elapsed;
};
/**
* Creates a new timer object.
**/
ESR_ReturnCode PCPUTimerCreate(PCPUTimer **timer)
{
PCPUTimer *tmp = NULL;
if (timer == NULL)
return ESR_INVALID_ARGUMENT;
tmp = NEW(PCPUTimer, "PCPUTimer");
if (tmp == NULL) return ESR_OUT_OF_MEMORY;
tmp->hThread = GetCurrentThread();
tmp->RefTime.QuadPart = -1;
tmp->elapsed = 0;
*timer = tmp;
return ESR_SUCCESS;
}
ESR_ReturnCode PCPUTimerDestroy(PCPUTimer *timer)
{
if (timer == NULL) return ESR_INVALID_ARGUMENT;
FREE(timer);
return ESR_SUCCESS;
}
/**
* Starts the timer. This sets the reference time from which all new elapsed
* time are computed. This does not reset the elapsed time to 0. This is
* useful to pause the timer.
**/
ESR_ReturnCode PCPUTimerStart(PCPUTimer *timer)
{
FILETIME CreationTime;
FILETIME ExitTime;
FILETIME KernelTime;
FILETIME UserTime;
if (timer == NULL) return ESR_INVALID_ARGUMENT;
if (!GetThreadTimes(timer->hThread,
&CreationTime, &ExitTime, &KernelTime, &UserTime))
{
return ESR_FATAL_ERROR;
}
timer->RefTime.QuadPart = (((LARGE_INTEGER*) & KernelTime)->QuadPart +
((LARGE_INTEGER*) & UserTime)->QuadPart);
return ESR_SUCCESS;
}
/**
* Stops the timer.
**/
ESR_ReturnCode PCPUTimerStop(PCPUTimer *timer)
{
if (timer == NULL) return ESR_INVALID_ARGUMENT;
if (timer->RefTime.QuadPart != -1)
{
FILETIME CreationTime;
FILETIME ExitTime;
FILETIME KernelTime;
FILETIME UserTime;
if (!GetThreadTimes(timer->hThread,
&CreationTime, &ExitTime, &KernelTime, &UserTime))
return ESR_FATAL_ERROR;
timer->elapsed =
(asr_uint32_t) (((LARGE_INTEGER*) &KernelTime)->QuadPart +
((LARGE_INTEGER*) &UserTime)->QuadPart -
timer->RefTime.QuadPart) / 10;
}
return ESR_SUCCESS;
}
/**
* Returns the timer elapsed time. If the Timer is in the stopped state,
* successive calls to getElapsed() will always return the same value. If
* the Timer is in the started state, successive calls will return the
* elapsed time since the last time PCPUTimerStart() was called.
*/
ESR_ReturnCode PCPUTimerGetElapsed(PCPUTimer *timer, asr_uint32_t *elapsed)
{
if (timer == NULL || elapsed == NULL) return ESR_INVALID_ARGUMENT;
if (timer->RefTime.QuadPart != -1)
{
FILETIME CreationTime;
FILETIME ExitTime;
FILETIME KernelTime;
FILETIME UserTime;
if (!GetThreadTimes(timer->hThread,
&CreationTime, &ExitTime, &KernelTime, &UserTime))
return ESR_FATAL_ERROR;
*elapsed = timer->elapsed +
(asr_uint32_t)(((LARGE_INTEGER*) & KernelTime)->QuadPart +
((LARGE_INTEGER*) & UserTime)->QuadPart -
timer->RefTime.QuadPart) / 10;
}
else
*elapsed = timer->elapsed;
return ESR_SUCCESS;
}
/**
* Resets the elapsed time to 0 and resets the reference time of the Timer.
* This effectively reset the timer in the same state it was right after creation.
**/
ESR_ReturnCode PCPUTimerReset(PCPUTimer *timer)
{
if (timer == NULL) return ESR_INVALID_ARGUMENT;
timer->RefTime.QuadPart = -1;
timer->elapsed = 0;
return ESR_SUCCESS;
}
#elif defined(POSIX)
/*
*/
struct PCPUTimer_t
{
HANDLE hThread;
asr_uint32_t RefTime;
asr_uint32_t elapsed;
};
/**
* Creates a new timer object.
**/
ESR_ReturnCode PCPUTimerCreate(PCPUTimer **timer)
{
PCPUTimer *tmp = NULL;
if (timer == NULL) return ESR_INVALID_ARGUMENT;
tmp = NEW(PCPUTimer, "PCPUTimer");
if (tmp == NULL) return ESR_OUT_OF_MEMORY;
tmp->hThread = (HANDLE)pthread_self();
tmp->elapsed = 0;
*timer = tmp;
return ESR_SUCCESS;
}
ESR_ReturnCode PCPUTimerDestroy(PCPUTimer *timer)
{
if (timer == NULL) return ESR_INVALID_ARGUMENT;
FREE(timer);
return ESR_SUCCESS;
}
/**
* Starts the timer. This sets the reference time from which all new elapsed
* time are computed. This does not reset the elapsed time to 0. This is
* useful to pause the timer.
**/
ESR_ReturnCode PCPUTimerStart(PCPUTimer *timer)
{
return ESR_SUCCESS;
}
/**
* Stops the timer.
**/
ESR_ReturnCode PCPUTimerStop(PCPUTimer *timer)
{
return ESR_SUCCESS;
}
/**
* Returns the timer elapsed time. If the Timer is in the stopped state,
* successive calls to getElapsed() will always return the same value. If
* the Timer is in the started state, successive calls will return the
* elapsed time since the last time PCPUTimerStart() was called.
*/
ESR_ReturnCode PCPUTimerGetElapsed(PCPUTimer *timer, asr_uint32_t *elapsed)
{
return ESR_SUCCESS;
}
/**
* Resets the elapsed time to 0 and resets the reference time of the Timer.
* This effectively reset the timer in the same state it was right after creation.
**/
ESR_ReturnCode PCPUTimerReset(PCPUTimer *timer)
{
return ESR_SUCCESS;
}
#else
/* #error "Ptimer not implemented for this platform." */
#endif
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