/usr/include/sipxtapi/os/linux/OsMutexLinux.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 _OsMutexLinux_h_
#define _OsMutexLinux_h_
// SYSTEM INCLUDES
// APPLICATION INCLUDES
#include "os/OsMutex.h"
#include "os/linux/OsLinuxDefs.h"
#include "os/linux/pt_mutex.h"
// DEFINES
// MACROS
// EXTERNAL FUNCTIONS
// EXTERNAL VARIABLES
// CONSTANTS
// STRUCTS
// TYPEDEFS
// FORWARD DECLARATIONS
//:Mutual exclusion semaphore (mutex) for Linux
// The mutual-exclusion semaphore is a specialized version of the binary
// semaphore, designed to address issues inherent in mutual exclusion, such
// as recursive access to resources, priority inversion, and deletion safety
// The fundamental behavior of the mutual-exclusion semaphore is identical to
// except for the following restrictions: it can only be used for mutual
// exclusion and it can only be released by the task that acquired it.
class OsMutexLinux : public OsMutexBase
{
/* //////////////////////////// PUBLIC //////////////////////////////////// */
public:
/* ============================ CREATORS ================================== */
OsMutexLinux(const unsigned options);
//:Constructor
virtual
~OsMutexLinux();
//:Destructor
/* ============================ MANIPULATORS ============================== */
virtual OsStatus acquire(const OsTime& rTimeout = OsTime::OS_INFINITY);
//:Block the task until the semaphore is acquired or the timeout expires
virtual OsStatus tryAcquire(void);
//:Conditionally acquire the mutex (i.e., don't block)
// Return OS_BUSY if the mutex is held by some other task
virtual OsStatus release(void);
//:Release the semaphore
/* ============================ ACCESSORS ================================= */
virtual void OsMutexShow(void);
//:Print mutex information to the console.
/* ============================ INQUIRY =================================== */
/* //////////////////////////// PROTECTED ///////////////////////////////// */
protected:
/* //////////////////////////// PRIVATE /////////////////////////////////// */
private:
pt_mutex_t mMutexImp; // Pingtel-Linux mutex
OsMutexLinux();
//:Default constructor (not implemented for this class)
OsMutexLinux(const OsMutexLinux& rOsMutexLinux);
//:Copy constructor (not implemented for this class)
OsMutexLinux& operator=(const OsMutexLinux& rhs);
//:Assignment operator (not implemented for this class)
};
/* ============================ INLINE METHODS ============================ */
#endif // _OsMutexLinux_h_
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