root.c

经典的psos编程实例源码

/* root.c */

#include "sys_conf.h"
#include <psos.h>
#include <prepc.h>
#include <stdio.h>

#include "misc.h"
#include "appl.h"

/* ROOT task */
void
root()
{
	void	*dummy;
	ULONG	retval, iopb[4], rc, args[4],
		tid1, tid2, tid3, tid4, ignored;

	/* Initialize all drivers */
	de_init(DEV_TIMER, 0, &retval, &dummy);
	de_init(DEV_SERIAL, 0, &retval, &dummy);

	bpinit(128*100);
	bprintf("\nRoot task begin\n");

	/* Create and start the tasks */
	args[1] = args[2] = args[3] = 0;
	args[0] = (ULONG) T1_NAM;	/* This task's name */
	if (rc = t_create(T1_NAM, 128, 1024, 1024, 0, &tid1))
		fail(rc, "root: t_create(%s)", T1_NAM);
	if (rc = t_start(tid1, 0, (void(*)()) task, args))
		fail(rc, "root: t_start(%s)", T1_NAM);

	args[0] = (ULONG) T2_NAM;	/* This task's name */
	if (rc = t_create(T2_NAM, 128, 1024, 1024, 0, &tid2))
		fail(rc, "root: t_create(%s)", T2_NAM);
	if (rc = t_start(tid2, 0, (void(*)()) task, args))
		fail(rc, "root: t_start(%s)", T2_NAM);

	args[0] = (ULONG) T3_NAM;	/* This task's name */
	if (rc = t_create(T3_NAM, 200, 1024, 1024, 0, &tid3))
		fail(rc, "root: t_create(%s)", T3_NAM);
	if (rc = t_start(tid3, 0, (void(*)()) task, args))
		fail(rc, "root: t_start(%s)", T3_NAM);

	args[0] = (ULONG) T4_NAM;	/* This task's name */
	if (rc = t_create(T4_NAM, 100, 1024, 1024, 0, &tid4))
		fail(rc, "root: t_create(%s)", T4_NAM);
	if (rc = t_start(tid4, 0, (void(*)()) task, args))
		fail(rc, "root: t_start(%s)", T4_NAM);

	/* Delay one second */
	tm_wkafter(1*SECOND);

	/* Example finished */
	bprintf("Root task end\n");
	bpflush();
	exit(0);
}