    /*====================================================================
     * os_thread.h
     *
     * Copyright 1995, Silicon Graphics, Inc.
     * All Rights Reserved.
     *
     * This is UNPUBLISHED PROPRIETARY SOURCE CODE of Silicon Graphics,
     * Inc.; the contents of this file may not be disclosed to third
     * parties, copied or duplicated in any form, in whole or in part,
     * without the prior written permission of Silicon Graphics, Inc.
     *
     * RESTRICTED RIGHTS LEGEND:
     * Use, duplication or disclosure by the Government is subject to
     * restrictions as set forth in subdivision (c)(1)(ii) of the Rights
     * in Technical Data and Computer Software clause at DFARS
     * 252.227-7013, and/or in similar or successor clauses in the FAR,
     * DOD or NASA FAR Supplement. Unpublished - rights reserved under the
     * Copyright Laws of the United States.
     *====================================================================*/

    /*---------------------------------------------------------------------*
            Copyright (C) 1998 Nintendo. (Originated by SGI)

            $RCSfile: os_thread.h,v $
            $Revision: 1.1 $
            $Date: 1998/10/09 08:01:19 $
     *---------------------------------------------------------------------*/

    #ifndef _OS_THREAD_H_
    #define	_OS_THREAD_H_

    #ifdef _LANGUAGE_C_PLUS_PLUS
    extern "C" {
    #endif

    #include <PR/ultratypes.h>

    #if defined(_LANGUAGE_C) || defined(_LANGUAGE_C_PLUS_PLUS)

    /**************************************************************************
     *
     * Type definitions
     *
     */

    typedef s32	OSPri;
    typedef s32	OSId;
    typedef union	{ struct { f32 f_odd; f32 f_even; } f; f64 d; }	__OSfp;

    typedef struct {
    	u64	at, v0, v1, a0, a1, a2, a3;
    	u64	t0, t1, t2, t3, t4, t5, t6, t7;
    	u64	s0, s1, s2, s3, s4, s5, s6, s7;
    	u64	t8, t9,         gp, sp, s8, ra;
    	u64	lo, hi;
    	u32	sr, pc, cause, badvaddr, rcp;
    	u32	fpcsr;
    	__OSfp	 fp0,  fp2,  fp4,  fp6,  fp8, fp10, fp12, fp14;
    	__OSfp	fp16, fp18, fp20, fp22, fp24, fp26, fp28, fp30;
    } __OSThreadContext;

    typedef struct OSThread_s {
    	struct OSThread_s	*next;		/* run/mesg queue link */
    	OSPri			priority;	/* run/mesg queue priority */
    	struct OSThread_s	**queue;	/* queue thread is on */
    	struct OSThread_s	*tlnext;	/* all threads queue link */
    	u16			state;		/* OS_STATE_* */
    	u16			flags;		/* flags for rmon */
    	OSId			id;		/* id for debugging */
    	int			fp;		/* thread has used fp unit */
    	__OSThreadContext	context;	/* register/interrupt mask */
    } OSThread;

    #endif /* defined(_LANGUAGE_C) || defined(_LANGUAGE_C_PLUS_PLUS) */

    /**************************************************************************
     *
     * Global definitions
     *
     */

    /* Thread states */

    #define OS_STATE_STOPPED	1
    #define OS_STATE_RUNNABLE	2
    #define OS_STATE_RUNNING	4
    #define OS_STATE_WAITING	8

    /* Recommended thread priorities for the system threads */

    #define OS_PRIORITY_MAX		255
    #define OS_PRIORITY_VIMGR	254
    #define OS_PRIORITY_RMON	250
    #define OS_PRIORITY_RMONSPIN	200
    #define OS_PRIORITY_PIMGR	150
    #define OS_PRIORITY_SIMGR	140
    #define	OS_PRIORITY_APPMAX	127
    #define OS_PRIORITY_IDLE	  0	/* Must be 0 */

    #if defined(_LANGUAGE_C) || defined(_LANGUAGE_C_PLUS_PLUS)

    /**************************************************************************
     *
     * Macro definitions
     *
     */

    /**************************************************************************
     *
     * Extern variables
     *
     */

    /**************************************************************************
     *
     * Function prototypes
     *
     */

    /* Thread operations */

    extern void		osCreateThread(OSThread *, OSId, void (*)(void *),
    				       void *, void *, OSPri);
    extern void		osDestroyThread(OSThread *);
    extern void		osYieldThread(void);
    extern void		osStartThread(OSThread *);
    extern void		osStopThread(OSThread *);
    extern OSId		osGetThreadId(OSThread *);
    extern void		osSetThreadPri(OSThread *, OSPri);
    extern OSPri		osGetThreadPri(OSThread *);

    #endif  /* defined(_LANGUAGE_C) || defined(_LANGUAGE_C_PLUS_PLUS) */

    #ifdef _LANGUAGE_C_PLUS_PLUS
    }
    #endif

    #endif /* !_OS_THREAD_H_ */