/usr/include/sipxtapi/os/OsWriteLock.h is in libsipxtapi-dev 3.3.0~test17-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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// Copyright (C) 2004-2006 SIPfoundry Inc.
// Licensed by SIPfoundry under the LGPL license.
//
// Copyright (C) 2004-2006 Pingtel Corp. All rights reserved.
// Licensed to SIPfoundry under a Contributor Agreement.
//
// $$
///////////////////////////////////////////////////////////////////////////////
#ifndef _OsWriteLock_h_
#define _OsWriteLock_h_
// SYSTEM INCLUDES
// APPLICATION INCLUDES
#include "OsRWMutex.h"
// DEFINES
// MACROS
// EXTERNAL FUNCTIONS
// EXTERNAL VARIABLES
// CONSTANTS
// STRUCTS
// TYPEDEFS
// FORWARD DECLARATIONS
//:Lock class allowing exclusive access for a writer within a critical section
// This class uses OsRWMutex objects for synchronization. The constructor
// for the class automatically blocks until the OsRWMutex is acquired
// for writing. Similarly, the destructor automatically releases the lock.
// <p>
// The easiest way to use this object as a guard is to create the
// object as a variable on the stack just before the section that needs to
// lock the resource for writing. When the OsWriteLock object goes out of
// scope, the writer lock will be automatically released.
// An example of this form of use is shown below.
// <p>
// <font face="courier">
// someMethod() <br>
// { <br>
// OsWriteLock lock(myRWMutex); <br>
// <br>
// < section that needs to be
// locked for writing > <br>
// } </font>
class OsWriteLock
{
/* //////////////////////////// PUBLIC //////////////////////////////////// */
public:
/* ============================ CREATORS ================================== */
OsWriteLock(OsRWMutex& rRWMutex)
: mrRWMutex(rRWMutex) { rRWMutex.acquireWrite(); };
//:Constructor
virtual
~OsWriteLock() { mrRWMutex.releaseWrite(); };
//:Destructor
/* ============================ MANIPULATORS ============================== */
/* ============================ ACCESSORS ================================= */
/* ============================ INQUIRY =================================== */
/* //////////////////////////// PROTECTED ///////////////////////////////// */
protected:
/* //////////////////////////// PRIVATE /////////////////////////////////// */
private:
OsRWMutex& mrRWMutex;
OsWriteLock();
//:Default constructor (not implemented for this class)
OsWriteLock(const OsWriteLock& rOsWriteLock);
//:Copy constructor (not implemented for this class)
OsWriteLock& operator=(const OsWriteLock& rhs);
//:Assignment operator (not implemented for this class)
};
/* ============================ INLINE METHODS ============================ */
#endif // _OsWriteLock_h_
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