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- #ifndef _PROC_H
- #define _PROC_H
-
- #include <setjmp.h>
-
- #ifndef _MBUF_H
- #include "mbuf.h"
- #endif
-
- #ifndef _TIMER_H
- #include "timer.h"
- #endif
-
- #define SIGQSIZE 200 /* Entries in psignal queue */
-
- /* Kernel process control block */
- #define PHASH 16 /* Number of wait table hash chains */
- struct proc {
- struct proc *prev; /* Process table pointers */
- struct proc *next;
-
- int flags;
- #define P_ISTATE 1 /* Process has interrupts enabled */
- #define P_SSET 2 /* Process has set sig */
- #define P_FREEARGS 4 /* Free args on termination */
-
- jmp_buf env; /* Process state */
- jmp_buf sig; /* State for alert signal */
- int signo; /* Arg to alert to cause signal */
- unsigned short state;
- #define READY 0
- #define WAITING 1
- #define SUSPEND 2
- void *event; /* Wait event */
- int16 *stack; /* Process stack */
- unsigned stksize; /* Size of same */
- char *name; /* Arbitrary user-assigned name */
- int retval; /* Return value from next pwait() */
- struct timer alarm; /* Alarm clock timer */
- FILE *input;
- FILE *output;
- int iarg; /* Copy of iarg */
- void *parg1; /* Copy of parg1 */
- void *parg2; /* Copy of parg2 */
- };
- #define NULLPROC (struct proc *)0
- extern struct proc *Waittab[]; /* Head of wait list */
- extern struct proc *Rdytab; /* Head of ready list */
- extern struct proc *Curproc; /* Currently running process */
- extern struct proc *Susptab; /* Suspended processes */
- extern int Stkchk; /* Stack checking flag */
-
- struct sigentry {
- void *event;
- int n;
- };
- struct ksig {
- struct sigentry entry[SIGQSIZE];
- struct sigentry *wp;
- struct sigentry *rp;
- volatile int nentries; /* modified both by interrupts and main */
- int maxentries;
- int32 dupsigs;
- int lostsigs;
- int32 psigs; /* Count of psignal calls */
- int32 psigwakes; /* Processes woken */
- int32 psignops; /* Psignal calls that didn't wake anything */
- int32 psigsqueued; /* Psignal calls queued with ints off */
- int32 pwaits; /* Count of pwait calls */
- int32 pwaitnops; /* pwait calls that didn't block */
- int32 pwaitints; /* Pwait calls from interrupt context (error) */
- };
- extern struct ksig Ksig;
-
- /* Prepare for an exception signal and return 0. If after this macro
- * is executed any other process executes alert(pp,val), this will
- * invoke the exception and cause this macro to return a second time,
- * but with the return value 1. This cannot be a function since the stack
- * frame current at the time setjmp is called must still be current
- * at the time the signal is taken. Note use of comma operators to return
- * the value of setjmp as the overall macro expression value.
- */
- #define SETSIG(val) (Curproc->flags |= P_SSET,\
- Curproc->signo = (val),setjmp(Curproc->sig))
-
- /* In kernel.c: */
- void alert __ARGS((struct proc *pp,int val));
- void chname __ARGS((struct proc *pp,char *newname));
- void killproc __ARGS((struct proc *pp));
- void killself __ARGS((void));
- struct proc *mainproc __ARGS((char *name));
- struct proc *newproc __ARGS((char *name,unsigned int stksize,
- void (*pc) __ARGS((int,void *,void *)),
- int iarg,void *parg1,void *parg2,int freeargs));
- void psignal __ARGS((void *event,int n));
- int pwait __ARGS((void *event));
- void resume __ARGS((struct proc *pp));
- int setsig __ARGS((int val));
- void suspend __ARGS((struct proc *pp));
-
- /* In ksubr.c: */
- void chkstk __ARGS((void));
- void kinit __ARGS((void));
- unsigned phash __ARGS((void *event));
- void psetup __ARGS((struct proc *pp,int iarg,void *parg1,void *parg2,
- void __ARGS(((*pc) __ARGS((int,void *,void *)) )) ));
- #ifdef AMIGA
- void init_psetup __ARGS((struct proc *pp));
- #endif
-
- /* Stack background fill value for high water mark checking */
- #define STACKPAT 0x55aa
-
- /* Value stashed in location 0 to detect null pointer dereferences */
- #define NULLPAT 0xdead
-
- #endif /* _PROC_H */
-