Macros
#define	SY_SEMAPHORE_AVAILABLE

#define	SYSemaphore sem_t

#define	sySemaphoreDelete(_s) sem_destroy(&_s)

#define	sySemaphoreTake(_s) sem_wait(&_s)

#define	sySemaphoreGive(_s) sem_post(&_s)

Functions
NQ_STATUS	sySemaphoreCreate (SYSemaphore *semId, NQ_UINT count)

void	sySemaphoreResetCounter (SYSemaphore *pSemID)

NQ_INT	sySemaphoreTimedTake (SYSemaphore *sem, NQ_INT timeout)

Detailed Description

Semaphores

1) We use mutex semaphores or simulate their behavior if the OS does not support pure mutex semaphores. 2) We use binary semaphores

#define SY_SEMAPHORE_AVAILABLE

Enable this define when semaphores are supported on system

#define SYSemaphore sem_t

Counting semaphore

#define sySemaphoreDelete ( _s ) sem_destroy(&_s)

#define sySemaphoreTake ( _s ) sem_wait(&_s)

#define sySemaphoreGive ( _s ) sem_post(&_s)

NQ_STATUS sySemaphoreCreate	(	SYSemaphore *	semId,
		NQ_UINT	count
	)

Create semaphore

Parameters

semId	Pointer to the semaphore id
count	Number of resources

void sySemaphoreResetCounter ( SYSemaphore * pSemID )

Reset semaphore counter

Parameters

pSemID Pointer to the semaphore id

NQ_INT sySemaphoreTimedTake	(	SYSemaphore *	sem,
		NQ_INT	timeout
	)

Lock a resource protected by a binary semaphore

Parameters

sem	Binary semaphore
timeout	Timeout in seconds to wait for lock