/*
Copyright (c) 1993 Xerox Corporation.  All rights reserved.
*/
/*
$Id$

$Date$
 *
 * PCR_ThCtlTypes -- Datatypes for "Thread Control" interface.
 *
 * Nearly machine independent.
 * Mostly for use by GC and Debugger.
 *
 */


#ifndef	__PCR_ThCtlTypes_h
#define __PCR_ThCtlTypes_h 1


#include <config/PCR_StdTypes.h>
#include <th/PCR_ThTypes.h>

#include <limits.h>

/*
 * public scheduling state
 */

typedef enum {

    /* idle: used internally, should not be seen by clients */
    PCR_ThCtl_State_null = 0,

    /* ready to run */
    PCR_ThCtl_State_ready = 1,

    /* waiting for ml or cv */
    PCR_ThCtl_State_waitML = 2,
    PCR_ThCtl_State_waitCV = 3,

    /* terminated */
    PCR_ThCtl_State_finished = 4,

    PCR_ThCtl_State_last = LONG_MAX

} PCR_ThCtl_State;


/*
 * public thread info
 */

typedef struct PCR_ThCtl_FrameDataRep * PCR_ThCtl_FrameDataPtr;

typedef struct PCR_ThCtl_FrameDataRep {

    void * frame_sp;
    void * frame_fp;
    void * frame_pc;

} PCR_ThCtl_FrameData;



typedef struct PCR_ThCtl_TInfoRep * PCR_ThCtl_TInfoPtr;

typedef struct PCR_ThCtl_TInfoRep {

    /* scheduling state */
    PCR_ThCtl_State ti_state;
    union {
        struct {
            PCR_Th_ML * tiwm_ml;
            PCR_sigset_t tiwm_sigMask;
            PCR_Msec tiwm_wakeup;
        } tiw_mlInfo;
        struct {
            PCR_Th_CV * tiwc_cv;
            PCR_sigset_t tiwc_sigMask;
            PCR_Msec tiwc_wakeup;
        } tiw_cvInfo;
    } ti_waitInfo;
    PCR_Th_Pri ti_pri;
    PCR_Bool ti_ignoreRunExclusive;

    /* thread stack in use */
    void * ti_stkLow;
    void * ti_stkHi;

    /* stack limit */
    void * ti_stkLim;

    /* hottest saved frame in stack */
    PCR_ThCtl_FrameData ti_frame;

    /* other machine-dependent context */
    void * ti_mdContext;
    unsigned long ti_mdContextBytes;

} PCR_ThCtl_TInfo;




#endif /* ! __PCR_ThCtlTypes_h */

/*
$Log$
*/