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C:/temp/src/j2k/Posix/Mutex.hpp

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// Started by Harry
// Finished by Fred

#ifndef __J2K__PThread_Mutex_HPP__
#define __J2K__PThread_Mutex_HPP__

#include <j2k/Fred/Standard.hpp>
#include <pthread.h>
#include <time.h>
#include <j2k/Fred/Error/JErrorController.hpp>

// Uses:
// pthread_mutex_t
// pthread_mutex_attr_t
// pthread_cond_t
// pthread_cond_attr_t

class Lock;

class PThread_Mutex {
public:

/***********************************************
  Description of pthread_mutex_attr_t arguments.

  Attribute         Default Value
  =========         =============
  detachstate       PTHREAD_CREATE_JOINABLE
  schedpolicy       PTHREAD_INHERIT_SCHED
  schedparam        Inherited from parent thread
  contentionscope   PTHREAD_SCOPE_SYSTEM
  stacksize         4096
  stackaddr         NULL
*/

  // Default Constructor
  inline PThread_Mutex();

  // Destructor
  inline virtual ~PThread_Mutex();

  // Lock the mutex
  inline void lock();

  // Unlock the mutex
  inline void unlock();

  // Try to lock a mutex
  inline void tryLock();

  // Get the maximum priority (ceiling value) for the mutex
  inline int getPriorityCeiling();

  // Set the maximum priority (ceiling value) for the mutex
  inline int setPriorityCeiling( int new_ceiling );

  // Get the mutex attribute type
  inline int getType();

  // Get the mutex attribute protocol
  inline int getProtocol();

#if 0
protected:
  // Wait for a mutex
  inline void wait();

  // Send a notify signal for other process waiting for the mutex
  inline void notify();

  // Send a notifyAll broadcast signal for other process waiting for the mutex
  inline void notifyAll();
#endif

private:
  int  mutex_type;
  int  protocol;
  int  prioceiling;

  pthread_mutexattr_t attr;
  pthread_mutex_t     mutex;

//  pthread_cond_t      cond;
//  pthread_condattr_t  cond_attr;

// public:
//  friend class Lock;

private:

  // Copy constructor
  inline PThread_Mutex( const PThread_Mutex& src );

  // Assign operator
  inline const PThread_Mutex& operator=( const PThread_Mutex& src );
};

typedef PThread_Mutex  Mutex;

#endif

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