dpl_sem.h File Reference

uwb-core DPL (Decawave Porting Layer) semapahore wrappers More...

Detailed Description

uwb-core DPL (Decawave Porting Layer) semapahore wrappers

Author

Francisco Molina franc.nosp@m.ois-.nosp@m.xavie.nosp@m.r.mo.nosp@m.lina@.nosp@m.inri.nosp@m.a.fr

Definition in file dpl_sem.h.

#include <stdint.h>
#include "dpl_types.h"
#include "dpl_error.h"
#include "sema.h"

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Data Structures
struct	dpl_sem
	dpl semaphore wrapper More...

Functions
dpl_error_t	dpl_sem_init (struct dpl_sem *sem, uint16_t tokens)
	Initialize a semaphore. More...
dpl_error_t	dpl_sem_pend (struct dpl_sem *sem, dpl_time_t timeout)
	Pend (wait) for a semaphore. More...
dpl_error_t	dpl_sem_release (struct dpl_sem *sem)
	Release a semaphore. More...
uint16_t	dpl_sem_get_count (struct dpl_sem *sem)
	Get current semaphore's count.

Function Documentation

dpl_sem_init()

dpl_error_t dpl_sem_init	(	struct dpl_sem *	sem,
		uint16_t	tokens
	)

Initialize a semaphore.

Parameters

[in]	sem	pointer to semaphore
[in]	tokens	# of tokens the semaphore should contain initially.

Returns

dpl_error_t DPL_INVALID_PARM Semaphore passed in was NULL. DPL_OK no error.

dpl_sem_pend()

dpl_error_t dpl_sem_pend	(	struct dpl_sem *	sem,
		dpl_time_t	timeout
	)

Pend (wait) for a semaphore.

Parameters

[in]	sem	pointer to semaphore.
[in]	timeout	timeout, in os ticks. A timeout of 0 means do not wait if not available. A timeout of DPL_TIMEOUT_NEVER means wait forever.

Returns

dpl_error_t DPL_INVALID_PARM semaphore passed in was NULL. DPL_TIMEOUT semaphore was owned by another task and timeout=0 DPL_OK no error

dpl_sem_release()

dpl_error_t dpl_sem_release

(

struct dpl_sem *

sem

)

Release a semaphore.

Parameters

[in]

sem

pointer to the semaphore to be released

Returns

dpl_error_t DPL_INVALID_PARM semaphore passed in was NULL. DPL_OK no error