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/*****************************************************************************
* *
* PrimeSense PSCommon Library *
* Copyright (C) 2012 PrimeSense Ltd. *
* *
* This file is part of PSCommon. *
* *
* 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 "XnLib.h"
XnOSTimer g_xnOSHighResGlobalTimer;
bool g_xnOSInitialized = false;
XnStatus xnOSTimeInit();
static XnStatus g_initalizeStatus = xnOSTimeInit();
//---------------------------------------------------------------------------
// Code
//---------------------------------------------------------------------------
XN_C_API XnStatus xnOSGetEpochTime(XnUInt32* nEpochTime)
{
// Local function variables
*nEpochTime = (XnUInt32)time(NULL);
// All is good...
return (XN_STATUS_OK);
}
XN_C_API XnStatus xnOSGetTimeStamp(XnUInt64* nTimeStamp)
{
// Local function variables
XnStatus nRetVal = XN_STATUS_OK;
// Get the high resolution global timer value
nRetVal = xnOSGetHighResTimeStamp(nTimeStamp);
XN_IS_STATUS_OK(nRetVal);
// Convert from microseconds to milliseconds
*nTimeStamp /= 1000;
// All is good...
return (XN_STATUS_OK);
}
XN_C_API XnStatus xnOSGetHighResTimeStamp(XnUInt64* nTimeStamp)
{
// Local function variables
XnStatus nRetVal = XN_STATUS_OK;
// TODO: Check if the core subsystem is initialized
// Validate the input/output pointers (to make sure none of them is NULL)
XN_VALIDATE_OUTPUT_PTR(nTimeStamp);
// Get the high resolution global timer value
nRetVal = xnOSQueryTimer(g_xnOSHighResGlobalTimer, nTimeStamp);
XN_IS_STATUS_OK(nRetVal);
// All is good...
return (XN_STATUS_OK);
}
XN_C_API XnStatus xnOSSleep(XnUInt32 nMilliseconds)
{
// Sleep via the OS
Sleep(nMilliseconds);
// All is good...
return (XN_STATUS_OK);
}
XN_C_API XnStatus xnOSStartTimer(XnOSTimer* pTimer)
{
// Local function variables
XnBool bRetVal = FALSE;
LARGE_INTEGER nTicksPerSecond;
// Validate the input/output pointers (to make sure none of them is NULL)
XN_VALIDATE_INPUT_PTR(pTimer);
bRetVal = QueryPerformanceFrequency(&nTicksPerSecond);
XN_IS_BOOL_OK_RET(bRetVal, XN_STATUS_ERROR);
pTimer->dTicksPerTimeUnit = (XnDouble)nTicksPerSecond.QuadPart / 1000.0;
bRetVal = QueryPerformanceCounter(&pTimer->nStartTick);
XN_IS_BOOL_OK_RET(bRetVal, XN_STATUS_ERROR);
// All is good...
return (XN_STATUS_OK);
}
XN_C_API XnStatus xnOSStartHighResTimer(XnOSTimer* pTimer)
{
// Local function variables
XnStatus nRetVal = XN_STATUS_OK;
nRetVal = xnOSStartTimer(pTimer);
XN_IS_STATUS_OK(nRetVal);
// Convert from microseconds to milliseconds
pTimer->dTicksPerTimeUnit /= 1000.0;
// All is good...
return (XN_STATUS_OK);
}
XnStatus xnOSTimeInit()
{
if (!g_xnOSInitialized)
{
xnOSStartHighResTimer(&g_xnOSHighResGlobalTimer);
g_xnOSInitialized = true;
}
return XN_STATUS_OK;
}
XN_C_API XnStatus xnOSQueryTimer(XnOSTimer Timer, XnUInt64* pnTimeSinceStart)
{
// Local function variables
XnBool bRetVal = FALSE;
LARGE_INTEGER nCurrTick;
// Validate the input/output pointers (to make sure none of them is NULL)
XN_VALIDATE_OUTPUT_PTR(pnTimeSinceStart);
if (Timer.dTicksPerTimeUnit == 0)
{
return (XN_STATUS_ERROR);
}
bRetVal = QueryPerformanceCounter(&nCurrTick);
XN_IS_BOOL_OK_RET(bRetVal, XN_STATUS_ERROR);
*pnTimeSinceStart = XnUInt64((nCurrTick.QuadPart - Timer.nStartTick.QuadPart) / Timer.dTicksPerTimeUnit);
// All is good...
return (XN_STATUS_OK);
}
XN_C_API XnStatus xnOSStopTimer(XnOSTimer* pTimer)
{
// Validate the input/output pointers (to make sure none of them is NULL)
XN_VALIDATE_INPUT_PTR(pTimer);
if (pTimer->dTicksPerTimeUnit == 0)
{
return (XN_STATUS_ERROR);
}
xnOSMemSet(pTimer, 0, sizeof(XnOSTimer));
// All is good...
return (XN_STATUS_OK);
}
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