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/*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.OARcorp.com/rtems/license.html.
*
* $Id$
*/
#ifndef __ITRON_SEMAPHORE_h_
#define __ITRON_SEMAPHORE_h_
#ifdef __cplusplus
extern "C" {
#endif
/*
* Create Semaphore (cre_sem) Structure
*/
typedef struct t_csem {
VP exinf; /* extended information */
ATR sematr; /* semaphore attributes */
/* Following is the extended function for [level X]. */
INT isemcnt; /* initial semaphore count */
INT maxsem; /* maximum semaphore count */
/* additional information may be included depending on the implementation */
} T_CSEM;
/*
* sematr - Semaphore Attribute Values
*/
#define TA_TFIFO 0x00 /* waiting tasks are handled by FIFO */
#define TA_TPRI 0x01 /* waiting tasks are handled by priority */
#define _ITRON_SEMAPHORE_UNUSED_ATTRIBUTES ~(TA_TPRI)
/*
* Reference Semaphore (ref_sem) Structure
*/
typedef struct t_rsem {
VP exinf; /* extended information */
BOOL_ID wtsk; /* indicates whether or not there is a waiting task */
INT semcnt; /* current semaphore count */
/* additional information may be included depending on the implementation */
} T_RSEM;
/*
* Semaphore Functions
*/
/*
* cre_sem - Create Semaphore
*/
ER cre_sem(
ID semid,
T_CSEM *pk_csem
);
/*
* del_sem - Delete Semaphore
*/
ER del_sem(
ID semid
);
/*
* sig_sem - Signal Semaphore
*/
ER sig_sem(
ID semid
);
/*
* wai_sem - Wait on Semaphore
*/
ER wai_sem(
ID semid
);
/*
* preq_sem - Poll and Request Semaphore
*/
ER preq_sem(
ID semid
);
/*
* twai_sem - Wait on Semaphore with Timeout
*/
ER twai_sem(
ID semid,
TMO tmout
);
/*
* ref_sem - Reference Semaphore Status
*/
ER ref_sem(
ID semid,
T_RSEM *pk_rsem
);
#ifdef __cplusplus
}
#endif
#endif
/* end of include file */
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