FX::FXSemaphore Class Reference

A semaphore allows for protection of a resource that can be accessed by a fixed number of simultaneous threads. More...

#include <FXSemaphore.h>

Public Member Functions
	FXSemaphore (FXint count=1)
	Initialize semaphore with given count.
void	wait ()
	Decrement semaphore by 1, waiting if count is zero.
FXbool	wait (FXTime nsec)
	Try decrement semaphore; return false if timed out.
FXbool	trywait ()
	Try decrement semaphore, and return false if count was zero.
void	post ()
	Increment semaphore by 1.
	~FXSemaphore ()
	Delete semaphore.

Detailed Description

A semaphore allows for protection of a resource that can be accessed by a fixed number of simultaneous threads.

A typical example of the use of semaphores is for a buffer containing N items. A producer thread may freely append N items before blocking for space to become available; a consumer thread can remove items and block only when no items are left. Thus, two counting semaphores could be used to manage such a buffer, one counting empty slots and one counting filled slots. As long as production and consumption proceed at comparable rates, no thread needs to be suspended.

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

• /home/jeroen/FOX/fox/fox-1.7.85/include/FXSemaphore.h