mq5.0-source.src.share.cclient.basictypes.Monitor.cpp Maven / Gradle / Ivy

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/*
 * @(#)Monitor.cpp	1.4 06/26/07
 */ 

#include "Monitor.hpp"
#include "../util/UtilityMacros.h"

/*
 *
 */
Monitor::Monitor()
{
  /* This is a little worrisome.  If it fails, then we really don't
     have any way to know about it. */
  this->monitor = PR_NewMonitor();
  this->depth = 0;
}

/*
 *
 */
Monitor::~Monitor()
{
  // Sometimes the following assert would fail, but when examining the
  // code this->depth would be 0 because a separate thread changed the value
  // by calling exit().  This allows us to see what the value was before.
  int curDepth = this->depth;
  ASSERT( this->depth == 0 );
  
  PR_DestroyMonitor(this->monitor);
  this->depth = -1000;
}


/*
 *
 */
void
Monitor::enter()
{
  PR_EnterMonitor(this->monitor);
  ASSERT( this->depth >= 0 );
  this->depth++;
}

/*
 *
 */
void
Monitor::exit()
{
  this->depth--;
  ASSERT( this->depth >= 0 );
  PR_ExitMonitor(this->monitor);
}



/*
 *
 */
void
Monitor::wait()
{
  ASSERT( this->depth > 0 );
  this->wait(PR_INTERVAL_NO_TIMEOUT);
}

/*
 *
 */
void 
Monitor::wait(const PRIntervalTime timeout)
{
  ASSERT( this->depth > 0 );

  PR_Wait(this->monitor, timeout);
}

/*
 *
 */
void
Monitor::notifyOne()
{
  ASSERT( this->depth > 0 );
  PR_Notify(this->monitor);
}



/*
 *
 */
void
Monitor::notifyAll()
{
  ASSERT( this->depth > 0 );
  PR_NotifyAll(this->monitor);
}