chsem.h File Reference

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Detailed Description

Semaphores macros and structures.

Definition in file chsem.h.

Go to the source code of this file.

Data Structures
struct	Semaphore
	Semaphore structure. More...
Functions
void	chSemInit (Semaphore *sp, cnt_t n)
	Initializes a semaphore with the specified counter value.
void	chSemReset (Semaphore *sp, cnt_t n)
	Performs a reset operation on the semaphore.
void	chSemResetI (Semaphore *sp, cnt_t n)
	Performs a reset operation on the semaphore.
msg_t	chSemWait (Semaphore *sp)
	Performs a wait operation on a semaphore.
msg_t	chSemWaitS (Semaphore *sp)
	Performs a wait operation on a semaphore.
msg_t	chSemWaitTimeout (Semaphore *sp, systime_t time)
	Performs a wait operation on a semaphore with timeout specification.
msg_t	chSemWaitTimeoutS (Semaphore *sp, systime_t time)
	Performs a wait operation on a semaphore with timeout specification.
void	chSemSignal (Semaphore *sp)
	Performs a signal operation on a semaphore.
void	chSemSignalI (Semaphore *sp)
	Performs a signal operation on a semaphore.
void	chSemAddCounterI (Semaphore *sp, cnt_t n)
	Adds the specified value to the semaphore counter.
msg_t	chSemSignalWait (Semaphore *sps, Semaphore *spw)
	Performs atomic signal and wait operations on two semaphores.
Defines
#define	_SEMAPHORE_DATA(name, n)   {_THREADSQUEUE_DATA(name.s_queue), n}
	Data part of a static semaphore initializer.
#define	SEMAPHORE_DECL(name, n)   Semaphore name = _SEMAPHORE_DATA(name, n)
	Static semaphore initializer.
Macro Functions
#define	chSemFastWaitI(sp)   ((sp)->s_cnt--)
	Decreases the semaphore counter.
#define	chSemFastSignalI(sp)   ((sp)->s_cnt++)
	Increases the semaphore counter.
#define	chSemGetCounterI(sp)   ((sp)->s_cnt)
	Returns the semaphore counter current value.
Typedefs
typedef struct Semaphore	Semaphore
	Semaphore structure.