Conditional Class Reference

A conditional variable synchcronization object for one to one and one to many signal and control events between processes. conditional. More...

#include <thread.h>

Inheritance diagram for Conditional:

List of all members.

Public Member Functions
	Conditional (const char *id=NULL)
	Create an instance of a conditional.
virtual	~Conditional ()
	Destroy the conditional.
void	signal (bool broadcast)
	Signal a conditional object and a waiting threads.
bool	wait (timeout_t timer=0, bool locked=false)
	Wait to be signaled from another thread.

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Detailed Description

A conditional variable synchcronization object for one to one and one to many signal and control events between processes. conditional.

Conditional variables may wait for and receive signals to notify when to resume or perform operations. Multiple waiting threads may be woken with a broadcast signal.

Warning:

While this class inherits from Mutex, the methods of the class Conditional just handle the system conditional variable, so the user is responsible for calling enterMutex and leaveMutex so as to avoid race conditions. Another thing to note is that if you have several threads waiting on one condition, not uncommon in thread pools, each thread must take care to manually unlock the mutex if cancellation occurs. Otherwise the first thread cancelled will deadlock the rest of the thread.

Author:

David Sugar

Todo:

implement in win32

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Constructor & Destructor Documentation

Conditional::Conditional (  const char *  id = NULL  )

Create an instance of a conditional.

virtual Conditional::~Conditional (   )  [virtual]

Destroy the conditional.

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Member Function Documentation

void Conditional::signal (  bool  broadcast  )

Signal a conditional object and a waiting threads. Parameters: broadcast  this signal to all waiting threads if true.

bool Conditional::wait (  timeout_t  timer = 0, bool  locked = false )

Wait to be signaled from another thread. Parameters: time  period to wait. flag  if already locked the mutex.

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The documentation for this class was generated from the following file:

• thread.h

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