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/****************************************************************************
* *
* OpenNI 1.x Alpha *
* Copyright (C) 2011 PrimeSense Ltd. *
* *
* This file is part of OpenNI. *
* *
* OpenNI is free software: you can redistribute it and/or modify *
* it under the terms of the GNU Lesser General Public License as published *
* by the Free Software Foundation, either version 3 of the License, or *
* (at your option) any later version. *
* *
* OpenNI is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* GNU Lesser General Public License for more details. *
* *
* You should have received a copy of the GNU Lesser General Public License *
* along with OpenNI. If not, see <http://www.gnu.org/licenses/>. *
* *
****************************************************************************/
//---------------------------------------------------------------------------
// Includes
//---------------------------------------------------------------------------
#include <XnOS.h>
#include <XnLog.h>
//---------------------------------------------------------------------------
// Code
//---------------------------------------------------------------------------
XN_C_API XnStatus xnOSCreateSemaphore(XN_SEMAPHORE_HANDLE* pSemaphoreHandle, XnUInt32 nInitialCount)
{
XN_VALIDATE_OUTPUT_PTR(pSemaphoreHandle);
*pSemaphoreHandle = CreateSemaphore(NULL, nInitialCount, nInitialCount, NULL);
if (*pSemaphoreHandle == NULL)
{
xnLogError(XN_MASK_OS, "Failed to create semaphore. Last error was %u.", GetLastError());
XN_ASSERT(FALSE);
return XN_STATUS_OS_SEMAPHORE_CREATION_FAILED;
}
return XN_STATUS_OK;
}
XN_C_API XnStatus xnOSLockSemaphore(XN_SEMAPHORE_HANDLE hSemaphore, XnUInt32 nMilliseconds)
{
XN_RET_IF_NULL(hSemaphore, XN_STATUS_OS_INVALID_SEMAPHORE);
DWORD nRetVal = WaitForSingleObject(hSemaphore, nMilliseconds);
switch (nRetVal)
{
case WAIT_OBJECT_0:
break;
case WAIT_TIMEOUT:
return XN_STATUS_OS_SEMAPHORE_TIMEOUT;
default:
xnLogError(XN_MASK_OS, "Failed to wait for semaphore. Last error was %u.", GetLastError());
XN_ASSERT(FALSE);
return XN_STATUS_OS_SEMAPHORE_LOCK_FAILED;
}
return XN_STATUS_OK;
}
XN_C_API XnStatus xnOSUnlockSemaphore(XN_SEMAPHORE_HANDLE hSemaphore)
{
XN_RET_IF_NULL(hSemaphore, XN_STATUS_OS_INVALID_SEMAPHORE);
if (!ReleaseSemaphore(hSemaphore, 1, NULL))
{
xnLogError(XN_MASK_OS, "Failed to release semaphore. Last error was %u.", GetLastError());
XN_ASSERT(FALSE);
return XN_STATUS_OS_SEMAPHORE_UNLOCK_FAILED;
}
return XN_STATUS_OK;
}
XN_C_API XnStatus xnOSCloseSemaphore(XN_SEMAPHORE_HANDLE* pSemaphoreHandle)
{
XN_VALIDATE_INPUT_PTR(pSemaphoreHandle);
XN_RET_IF_NULL(*pSemaphoreHandle, XN_STATUS_OS_INVALID_SEMAPHORE);
if (!CloseHandle(*pSemaphoreHandle))
{
xnLogError(XN_MASK_OS, "Failed to release semaphore. Last error was %u.", GetLastError());
XN_ASSERT(FALSE);
return XN_STATUS_OS_SEMAPHORE_CLOSE_FAILED;
}
*pSemaphoreHandle = NULL;
return XN_STATUS_OK;
}
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