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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. *
* *
*****************************************************************************/
//---------------------------------------------------------------------------
// 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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