Desktop/xinu_mips-1.0.2.tar/xinu_mips-1.0.2/include/proc.h

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/* Embedded XINU, Copyright (C) 2007.  All rights reserved. */

#ifndef _PROC_H_
#define _PROC_H_

#include <kernel.h>
#include <semaphore.h>

/* process table declarations and defined constants                      */

#ifndef NPROC                 /*   if number of processes is not set,    */
#define NPROC       50        
#endif

/* unusual value marks the top of the process stack                      */
#define STACKMAGIC 0x0A0AAAA9

/* process state constants                                               */

#define PRCURR      1       
#define PRFREE      2       
#define PRREADY     3       
#define PRRECV      4       
#define PRSLEEP     5       
#define PRSUSP      6       
#define PRWAIT      7       
/* miscellaneous process definitions                                     */

#define PNMLEN      16      
/* the null process is always eligible to run                            */
#define NULLPROC    0       
#define BADPID     (-1)     
#define isbadpid(x) ((x)>=NPROC || PRFREE == proctab[(x)].state)

/* process table entry */

typedef struct pentry
{
        uchar   state;          
        ushort  prio;           
        void    *stkptr;        
        void    *stkbase;       
        ulong   stklen;         
        char    name[PNMLEN];   
        irqmask irqstate;       
        semaphore sem;          
        ushort  parent;         
        long    msg;            
        bool    hasmsg;         
} pcb;

/* process initialization constants */
#define INITSTK  65536      
#define INITPRIO 20         
#define INITRET  userret    
#define MINSTK   4096       
#define NULLSTK  MINSTK     
/* reschedule constants for send and receive */
#define BLOCK       1
#define NOBLOCK     0


extern struct pentry proctab[];
extern ushort numproc;      
extern ushort currpid;      
/* IPC prototypes */
syscall send(ushort pid, long msg, bool block);
syscall receive(bool block);

#endif /* _PROC_H_ */

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