/usr/include/sipxtapi/mp/MpSyncFlowgraphMsg.h is in libsipxtapi-dev 3.3.0~test17-2.1.
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// Copyright (C) 2009 SIPez LLC.
// Licensed to SIPfoundry under a Contributor Agreement.
//
// Copyright (C) 2009 SIPfoundry Inc.
// Licensed by SIPfoundry under the LGPL license.
//
// $$
///////////////////////////////////////////////////////////////////////////////
#ifndef _MpSyncFlowgraphMsg_h_
#define _MpSyncFlowgraphMsg_h_
// SYSTEM INCLUDES
// APPLICATION INCLUDES
#include "mp/MpFlowGraphMsg.h"
#include "utl/UtlSerialized.h"
#include "os/OsEvent.h"
// DEFINES
// MACROS
// EXTERNAL FUNCTIONS
// EXTERNAL VARIABLES
// CONSTANTS
// STRUCTS
// TYPEDEFS
// FORWARD DECLARATIONS
/**
* @brief Message used to communicate with a flowgraph with ability to wait for
* command completion and get its result.
*
* This message does not own the event, thus it should be managed by some
* outside means. As a special case, you should use pointer to a static OsEvent
* variable with the great care. In this case you must wait infinitely until
* event fires - if you do timed wait, you leave an opportunity to leave scope
* of the event variable before it is fired, thus signal() will be called on
* the freed stack variable and will lead to segfault. Here is an example:
* <code>
* OsEvent doneEvent;
* MpSyncFlowgraphMsg msg(MpFlowGraphMsg::FLOWGRAPH_GET_LATENCY_FOR_PATH, &doneEvent);
*
* ...
*
* // Send the message
* stat = postMessage(msg);
* if (stat != OS_SUCCESS)
* {
* // handle error
* ...
* }
*
* // Wait for result infinitely.
* stat = doneEvent.wait(OsTime::OS_INFINITY);
* if (stat != OS_SUCCESS)
* {
* // This mustn't happen, but just in case.
* ...
* }
*
* // Retrieve result from the event.
* intptr_t tmp;
* doneEvent.getUserData(tmp);
* latency = tmp;
* doneEvent.getEventData(tmp);
* stat = (OsStatus)tmp;
*
* return stat;
* </code>
*
* If you need a timed wait on done event, you must allocate event from heap and
* implement event hand off.
*/
class MpSyncFlowgraphMsg : public MpFlowGraphMsg
{
/* //////////////////////////// PUBLIC //////////////////////////////////// */
public:
/* ============================ CREATORS ================================== */
///@name Creators
//@{
/// Constructor
MpSyncFlowgraphMsg(int msgType, OsEvent *pDoneEvent = NULL)
: MpFlowGraphMsg(msgType)
, mpDoneEvent(pDoneEvent)
{
};
/// Copy constructor
MpSyncFlowgraphMsg(const MpSyncFlowgraphMsg& rMsg)
: MpFlowGraphMsg(rMsg)
, mpDoneEvent(rMsg.mpDoneEvent)
, mData(rMsg.mData)
{
};
/// @copydoc OsMsg::createCopy()
OsMsg* createCopy() const
{
return new MpSyncFlowgraphMsg(*this);
}
/// Destructor
~MpSyncFlowgraphMsg()
{
};
//@}
/* ============================ MANIPULATORS ============================== */
///@name Manipulators
//@{
/// Assignment operator
inline MpSyncFlowgraphMsg& operator=(const MpSyncFlowgraphMsg& rhs);
//@}
/* ============================ ACCESSORS ================================= */
///@name Accessors
//@{
/// Get stored data.
inline UtlSerialized &getData();
/// Get done-event.
inline OsEvent *getDoneEvent();
//@}
/* ============================ INQUIRY =================================== */
///@name Inquiry
//@{
//@}
/* //////////////////////////// PROTECTED ///////////////////////////////// */
protected:
/* //////////////////////////// PRIVATE /////////////////////////////////// */
private:
OsEvent *mpDoneEvent; ///< Event to signal when command is finished
///< and provide waiters with the result of
///< operation. Event is not owned by this object.
UtlSerialized mData; ///< Packed data to be passed to the resource,
};
/* ============================ INLINE METHODS ============================ */
MpSyncFlowgraphMsg& MpSyncFlowgraphMsg::operator=(const MpSyncFlowgraphMsg& rhs)
{
if (this == &rhs) // handle the assignment to self case
return *this;
MpFlowGraphMsg::operator=(rhs); // assign fields for parent class
mpDoneEvent = rhs.mpDoneEvent;
mData = rhs.mData;
return *this;
}
UtlSerialized &MpSyncFlowgraphMsg::getData()
{
return mData;
}
OsEvent *MpSyncFlowgraphMsg::getDoneEvent()
{
return mpDoneEvent;
}
#endif // _MpSyncFlowgraphMsg_h_
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