DAQpp::Semaphore Class Reference

class Semaphore. More...

#include <Thread.h>

List of all members.

Public Member Functions
	Semaphore (int ifirst)
	Constructor.
	~Semaphore ()
	Destructor.
int	wait (bool block=true)
	Waits untils the sempahore value is not 0.
void	post ()
	increases the semaphore count
int	count ()
	returns the value of the semaphore count
Private Attributes
sem_t	_sem
	The semaphore we are wrapping.

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Detailed Description

class Semaphore.

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Member Function Documentation

int Semaphore::wait

(

bool

block = true

)

Waits untils the sempahore value is not 0.

It will decrease the semaphore count on exit.

Parameters:

block

if false it is a non-blocking call, otherwise it will block.

Returns:

if in non blocking mode it will return 1 value if the semaphore has a 0 count, 0 if the value could be decreased and -1 in case of error. In blocking mode it will return 0 in case of success and -1 in case of problems

References _sem.

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

• Thread.h
• Thread.cc