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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"
#include "XnWin32Internal.h"
#include <XnLog.h>
XN_C_API XnStatus XN_C_DECL xnOSCreateEvent(XN_EVENT_HANDLE* pEventHandle, XnBool bManualReset)
{
return (xnOSCreateNamedEvent(pEventHandle, NULL, bManualReset));
}
XN_C_API XnStatus XN_C_DECL xnOSCreateNamedEvent(XN_EVENT_HANDLE* pEventHandle, const XnChar* cpEventName, XnBool bManualReset)
{
return xnOSCreateNamedEventEx(pEventHandle, cpEventName, bManualReset, FALSE);
}
XN_C_API XnStatus XN_C_DECL xnOSCreateNamedEventEx(XN_EVENT_HANDLE* pEventHandle, const XnChar* cpEventName, XnBool bManualReset, XnBool bAllowOtherUsers)
{
// Local function variables
XnStatus nRetVal = XN_STATUS_OK;
// Validate the input/output pointers (to make sure none of them is NULL)
XN_VALIDATE_OUTPUT_PTR(pEventHandle);
XnChar strEventOSName[MAX_PATH];
XnChar* pEventOSName = NULL;
SECURITY_ATTRIBUTES* pSecurityAttributes = NULL;
if (cpEventName != NULL)
{
nRetVal = xnWin32CreateKernelObjectName(strEventOSName, MAX_PATH, cpEventName, bAllowOtherUsers);
if (nRetVal != XN_STATUS_OK)
{
return XN_STATUS_OS_EVENT_CREATION_FAILED;
}
pEventOSName = strEventOSName;
nRetVal = xnWin32GetSecurityAttributes(bAllowOtherUsers, &pSecurityAttributes);
if (nRetVal != XN_STATUS_OK)
{
return XN_STATUS_OS_MUTEX_CREATION_FAILED;
}
}
// Create a named event via the OS
*pEventHandle = CreateEvent(pSecurityAttributes, bManualReset, FALSE, pEventOSName);
// Make sure it succeeded (return value is not null)
if (*pEventHandle == NULL)
{
xnLogError(XN_MASK_OS, "CreateEvent() failed with error %u", GetLastError());
return XN_STATUS_OS_EVENT_CREATION_FAILED;
}
// All is good...
return (XN_STATUS_OK);
}
XN_C_API XnStatus XN_C_DECL xnOSOpenNamedEvent(XN_EVENT_HANDLE* pEventHandle, const XnChar* cpEventName)
{
return xnOSOpenNamedEventEx(pEventHandle, cpEventName, FALSE);
}
XN_C_API XnStatus XN_C_DECL xnOSOpenNamedEventEx(XN_EVENT_HANDLE* pEventHandle, const XnChar* cpEventName, XnBool bAllowOtherUsers)
{
XnStatus nRetVal = XN_STATUS_OK;
XN_VALIDATE_INPUT_PTR(cpEventName);
XN_VALIDATE_OUTPUT_PTR(pEventHandle);
XnChar strEventOSName[MAX_PATH];
nRetVal = xnWin32CreateKernelObjectName(strEventOSName, MAX_PATH, cpEventName, bAllowOtherUsers);
if (nRetVal != XN_STATUS_OK)
{
return XN_STATUS_OS_EVENT_CREATION_FAILED;
}
*pEventHandle = OpenEvent(EVENT_MODIFY_STATE | SYNCHRONIZE, FALSE, cpEventName);
if (*pEventHandle == NULL)
{
return XN_STATUS_OS_EVENT_OPEN_FAILED;
}
return (XN_STATUS_OK);
}
XN_C_API XnStatus xnOSCloseEvent(XN_EVENT_HANDLE* pEventHandle)
{
// Local function variables
XnBool bRetVal = FALSE;
// Validate the input/output pointers (to make sure none of them is NULL)
XN_VALIDATE_INPUT_PTR(pEventHandle);
// Make sure the actual event handle isn't NULL
XN_RET_IF_NULL(*pEventHandle, XN_STATUS_OS_INVALID_EVENT);
// Close the event via the OS
bRetVal = CloseHandle(*pEventHandle);
// Make sure it succeeded (return value is true)
if (bRetVal != TRUE)
{
xnLogVerbose(XN_MASK_OS, "CloseHandle() failed with error %u", GetLastError());
return (XN_STATUS_OS_EVENT_CLOSE_FAILED);
}
// Null the output event
*pEventHandle = NULL;
// All is good...
return (XN_STATUS_OK);
}
XN_C_API XnStatus xnOSSetEvent(const XN_EVENT_HANDLE EventHandle)
{
// Local function variables
XnBool bRetVal = FALSE;
// Make sure the actual event handle isn't NULL
XN_RET_IF_NULL(EventHandle, XN_STATUS_OS_INVALID_EVENT);
// Set the event via the OS
bRetVal = SetEvent(EventHandle);
// Make sure it succeeded (return value is true)
if (bRetVal != TRUE)
{
xnLogVerbose(XN_MASK_OS, "SetEvent() failed with error %u", GetLastError());
return (XN_STATUS_OS_EVENT_SET_FAILED);
}
// All is good...
return (XN_STATUS_OK);
}
XN_C_API XnStatus xnOSResetEvent(const XN_EVENT_HANDLE EventHandle)
{
// Local function variables
XnBool bRetVal = FALSE;
// Make sure the actual event handle isn't NULL
XN_RET_IF_NULL(EventHandle, XN_STATUS_OS_INVALID_EVENT);
// Reset the event via the OS
bRetVal = ResetEvent(EventHandle);
// Make sure it succeeded (return value is true)
if (bRetVal != TRUE)
{
xnLogVerbose(XN_MASK_OS, "ResetEvent() failed with error %u", GetLastError());
return (XN_STATUS_OS_EVENT_RESET_FAILED);
}
// All is good...
return (XN_STATUS_OK);
}
XN_C_API XnStatus xnOSWaitEvent(const XN_EVENT_HANDLE EventHandle, XnUInt32 nMilliseconds)
{
// Local function variables
DWORD nRetVal = 0;
// Make sure the actual event handle isn't NULL
XN_RET_IF_NULL(EventHandle, XN_STATUS_OS_INVALID_EVENT);
// Wait for the event for a period if time (can be infinite)
nRetVal = WaitForSingleObject(EventHandle, nMilliseconds);
// Check the return value (WAIT_OBJECT_0 is OK)
if (nRetVal != WAIT_OBJECT_0)
{
// Handle the timeout failure
if (nRetVal == WAIT_TIMEOUT)
{
return (XN_STATUS_OS_EVENT_TIMEOUT);
}
else
{
xnLogVerbose(XN_MASK_OS, "WaitForSingleObject() failed with error %u", GetLastError());
return (XN_STATUS_OS_EVENT_WAIT_FAILED);
}
}
// All is good...
return (XN_STATUS_OK);
}
XN_C_API XnBool xnOSIsEventSet(const XN_EVENT_HANDLE EventHandle)
{
return (xnOSWaitEvent(EventHandle, 0) == XN_STATUS_OK);
}
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