thread.h

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/*
# This file is Copyright 2007, 2009 Dean Hall.
#
# This file is part of the PyMite VM.
# The PyMite VM is free software: you can redistribute it and/or modify
# it under the terms of the GNU GENERAL PUBLIC LICENSE Version 2.
#
# The PyMite VM is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
# A copy of the GNU GENERAL PUBLIC LICENSE Version 2
# is seen in the file COPYING in this directory.
*/


#ifndef __THREAD_H__
#define __THREAD_H__


#include "interp.h"


#define THREAD_RESCHEDULE_FREQUENCY    10


typedef enum PmInterpCtrl_e
{
    /* other erroneous exits go here with negative values */
    INTERP_CTRL_ERR = -1,   
    INTERP_CTRL_EXIT = 0,   
    INTERP_CTRL_CONT = 1,   
    INTERP_CTRL_RESCHED = 2 
        /* all positive values indicate "continue interpreting" */
} PmInterpCtrl_t, *pPmInterpCtrl_t;

typedef struct PmThread_s
{
    PmObjDesc_t od;

    pPmFrame_t pframe;

    PmInterpCtrl_t interpctrl;
} PmThread_t,
 *pPmThread_t;


PmReturn_t thread_new(pPmObj_t pframe, pPmObj_t *r_pobj);

#endif /* __THREAD_H__ */