Semaphore Class Reference

List of all members.

Public Member Functions
	Semaphore (unsigned int count=1)
	~Semaphore ()
void	acquire ()
bool	tryAcquire ()
void	release ()

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Detailed Description

Limits number of threads that can access shared resource simultaneously.

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Constructor & Destructor Documentation

Semaphore

(

unsigned int

count = 1

)

Initializes the instance with given value of "count".

Parameters:

count

indicates initial "count" for semaphore. State of semaphore is signaled when its count is greater than zero and non-signaled when it is zero.

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Member Function Documentation

void acquire

(

)

Decrements semaphore "counter" by one. If semaphore "counter" is already zero, blocks the thread until semaphore "count" becomes grater then zero.

void release

(

)

Increments semaphore "counter" by one. If there are other threads waiting for the object, it blocks one the them.

bool tryAcquire

(

)

Tries to acquire semaphore object. If its "counter" is already zero, returns false. In all cases, it doesn't block the thread and quites immediately.