nidas::util::Semaphore Class Reference

A POSIX semaphore. More...

#include <ThreadSupport.h>

Public Member Functions
	Semaphore ()
	Constructor.
	~Semaphore ()
	Destructor.
void	wait () throw ()
	Suspend calling thread until the semaphore has a non-zero count.
bool	check () throw ()
	Do a non-blocking wait on the Semaphore.
void	post () throw ()
	Atomically increment the Semaphore.
int	getValue () throw ()
	Get the current value of the Semaphore.
sem_t *	ptr ()
	Get the pointer to the semaphore (for legacy C code).

Private Member Functions
	Semaphore (const Semaphore &)
	No copying.
Semaphore &	operator= (const Semaphore &)
	No assignment allowed.

Private Attributes
sem_t	_sem

Detailed Description

A POSIX semaphore.

Constructor & Destructor Documentation

Semaphore() [1/2]

nidas::util::Semaphore::Semaphore ( )

inline

Constructor.

References _sem.

~Semaphore()

nidas::util::Semaphore::~Semaphore ( )

inline

Destructor.

References _sem.

Semaphore() [2/2]

nidas::util::Semaphore::Semaphore ( const Semaphore & )

private

No copying.

Member Function Documentation

check()

bool nidas::util::Semaphore::check ( ) throw (  )

inline

Do a non-blocking wait on the Semaphore.

Returns

true Semaphore had a non-zero count, which was decremented. false Semaphore was zero. Not changed.

References _sem.

getValue()

int nidas::util::Semaphore::getValue ( ) throw (  )

inline

Get the current value of the Semaphore.

References _sem.

operator=()

Semaphore & nidas::util::Semaphore::operator= ( const Semaphore & )

private

No assignment allowed.

post()

void nidas::util::Semaphore::post ( ) throw (  )

inline

Atomically increment the Semaphore.

References _sem.

ptr()

sem_t * nidas::util::Semaphore::ptr ( )

inline

Get the pointer to the semaphore (for legacy C code).

References _sem.

wait()

void nidas::util::Semaphore::wait ( ) throw (  )

inline

Suspend calling thread until the semaphore has a non-zero count.

Then atomically decrement the semaphore count and return;

References _sem.

Member Data Documentation

_sem

sem_t nidas::util::Semaphore::_sem

private

Referenced by check(), getValue(), post(), ptr(), Semaphore(), wait(), and ~Semaphore().

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

• nidas/util/ThreadSupport.h