sem.h

SEED的VPM642测试程序-板级支持库

/*
 *  Copyright 2003 by Texas Instruments Incorporated.
 *  All rights reserved. Property of Texas Instruments Incorporated.
 *  Restricted rights to use, duplicate or disclose this code are
 *  granted through contract.
 *  
 */
/* "@(#) DSP/BIOS 4.90.270 12-18-03 (barracuda-o04)" */
/*
 *  ======== sem.h ========
 *
 */

#ifndef SEM_
#define SEM_

#include <knl.h>
#include <obj.h>
#include <que.h>
#include <sys.h>

#ifdef __cplusplus
extern "C" {
#endif

/*
 *  ======== SEM_Obj ========
 *!
 *! Warning!  If any fields are added here, be sure to change COUNT in
 *! sem_dec.s##.
 */

typedef struct SEM_Obj 	*SEM_Handle;
typedef Void (*SEM_Fxn)(SEM_Handle);

typedef struct SEM_Obj {
    KNL_Job	job;		/* handles interrupt-level posting */
    Int		count;		/* semaphore value */
    QUE_Obj	pendQ;		/* tasks wait here */
#ifdef PRIORITY
    Uns		type;       /* bit mask SEM_PRIORITY (0x1) or SEM_FIFO (0x0) */
#endif
} SEM_Obj;

typedef struct SEM_Attrs {
    Uns		type;
} SEM_Attrs;

#define SEM_OBJECT(obj, count)  SEM_Obj obj = { \
    {				/* job */ \
	{ NULL, NULL },  	/* wListElem */ \
	0,			/* wCount */ \
	(KNL_Fxn)_SEM_dopost,	/* fxn */ \
    }, \
    count,			/* count */ \
    { &obj.pendQ, &obj.pendQ },	/* pendQ */ \
}

#ifdef PRIORITY
/*
 * bit mask for SEM_Attrs 'type' field -- default is (0x0)
 */
#define SEM_FIFO	0x0
#define SEM_PRIORITY	0x1
#endif

extern SEM_Attrs	SEM_ATTRS;	/* declared in sem_crea.c */

#define SEM_count(sem)		((sem)->count + (sem)->job.wCount)

#define SEM_new(_sem, _count)	(_sem)->count = _count; \
    				QUE_new(&(_sem)->pendQ); \
    				(_sem)->job.wCount = 0; \
				(_sem)->job.fxn = (KNL_Fxn)_SEM_dopost

#define SEM_reset(sem, cnt)	((sem)->count = (cnt))

extern Void SEM_post(SEM_Handle sem);
extern SEM_Handle SEM_create(Int count, SEM_Attrs *attrs);
extern Void SEM_delete(SEM_Handle sem);
extern Void SEM_ipost(SEM_Handle sem);
extern Bool SEM_pend(SEM_Handle sem, Uns timeout);
extern Void SEM_print(SEM_Handle sem);

/*
extern Bool _SEM_dec(SEM_Handle sem);
*/
extern Void _SEM_dopost(SEM_Handle sem);


/*
 *  The definitions below are needed as these are used by
 *  the expanded version of KNL_exit in SEM_postEnterKnl and SEM_pendEnterKnl
 */

#ifdef _6x_
extern far SWI_Obj KNL_swi;
extern far FXN_Obj *SWI_D_curfxn;
#else
extern SWI_Obj KNL_swi;
extern FXN_Obj *SWI_D_curfxn;
#endif

extern Uns SWI_D_curmask;

#ifdef __cplusplus
}
#endif /* extern "C" */

#endif /* SEM_ */