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[/] [openrisc/] [trunk/] [rtos/] [rtems/] [c/] [src/] [exec/] [itron/] [include/] [itronsys/] [semaphore.h] - Rev 484
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/* * COPYRIGHT (c) 1989-1999. * On-Line Applications Research Corporation (OAR). * * 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: semaphore.h,v 1.2 2001-09-27 11:59:12 chris Exp $ */ #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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