shithub: drawcpu

ref: cc7216394dd7f921e6856a9ce7fa0344816a222e
dir: /kern/procinit.c/

#include "u.h"
#include "lib.h"
#include "dat.h"
#include "fns.h"
#include "error.h"

void
procinit0(void)
{
	Proc *p;

	p = newproc();
	p->fgrp = dupfgrp(nil);
	p->rgrp = newrgrp();
	p->pgrp = newpgrp();
	p->egrp = newegrp();
	_setproc(p);

	up->slash = namec("#/", Atodir, 0, 0);
	pathclose(up->slash->path);
	up->slash->path = newpath("/");
	up->dot = cclone(up->slash);
}

Ref pidref;

Proc*
newproc(void)
{
	Proc *p;

	p = mallocz(sizeof(Proc), 1);
	p->pid = incref(&pidref);
	p->fd = mallocz(sizeof(Fd), 1);
	incref(&p->fd->ref);
	strcpy(p->user, eve);
	p->syserrstr = p->errbuf0;
	p->errstr = p->errbuf1;
	strcpy(p->text, "drawcpu");
	osnewproc(p);
	return p;
}

Proc*
proctab(int i)
{
	Proc *p;

	for(p = up; p != nil; p = p->parent) {
		if(p->pid == i)
			return p;
	}
	return nil;
}

void *
kproc(char *name, void (*fn)(void*), void *arg)
{
	Proc *p;

	p = newproc();
	p->fn = fn;
	p->arg = arg;
	p->slash = cclone(up->slash);
	p->dot = cclone(up->dot);
	p->rgrp = up->rgrp;
	p->parent = up;
	if(p->rgrp != nil)
		incref(&p->rgrp->ref);
	p->pgrp = up->pgrp;
	if(up->pgrp != nil)
		incref(&up->pgrp->ref);
	p->fgrp = up->fgrp;
	if(p->fgrp != nil)
		incref(&p->fgrp->ref);
	p->egrp = up->egrp;
	if(p->egrp != nil)
		incref(&p->egrp->ref);
	strecpy(p->text, p->text+sizeof p->text, name);

	osproc(p);
	return (void*)p;
}

void
pexit(char *msg, int freemem)
{
	Proc *p = up;

	USED(freemem);

	if(p->pgrp != nil){
		closepgrp(p->pgrp);
		p->pgrp = nil;
	}
	if(p->rgrp != nil){
		closergrp(p->rgrp);
		p->rgrp = nil;
	}
	if(p->fgrp != nil){
		closefgrp(p->fgrp);
		p->fgrp = nil;
	}

	if(freemem)
		freesegs();

	cclose(p->dot);
	cclose(p->slash);
	free(p);
	osexit(msg);
}