53 lines
1.5 KiB
C
53 lines
1.5 KiB
C
/* $Header$ */
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/* process.h - Define administration types and functions
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*
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* This file is to be included by implementors of the higher
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* level routines
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*
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*/
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#include "parco.h"
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#ifndef ptrdiff /* This type must be able to hold a pointer difference */
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#define ptrdiff int /* Define as long int if necessary */
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#endif
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#define nil 0
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void *alloc(), free();
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typedef ptrdiff wordsize, identification;
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wordsize top_size();
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int top_save();
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void top_load(); /* Primitives */
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struct procgroup;
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struct process {
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struct process *next; /* Next process in the same group */
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struct procgroup *down; /* Process group running under this process */
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void *stack; /* Pointer to the saved stack top */
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identification id; /* Coroutine identification */
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};
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#define init_between __i_b__ /* These names are hidden */
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#define save_between __s_b__
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#define load_betweens __l_b__
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#define delete_between __d_b__
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void init_between(), save_between(), load_betweens(), delete_between();
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struct procgroup {
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struct process **active;/* Active process within this group */
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struct procgroup *up; /* The group that this group belongs to */
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struct process *first; /* List of processes belonging to this group */
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void *s_brk; /* Point where the stack is split */
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void *between; /* Stack space between s_brk and up->s_brk */
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};
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#define group __grp__ /* Ignore this please */
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#define highest_group __hgrp__
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extern struct procgroup *group; /* Current running group */
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extern struct procgroup *highest_group; /* highest group that has been seen
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* while searching for a process
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*/
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