app.c

来自「RT-Linux源码 一个实时操作系统源码」· C语言 代码 · 共 43 行

//#include <asm/rt_time.h> 
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <stdio.h>
#include <unistd.h>
#include <errno.h>
#include "control.h"

event_info ev1,ev2;

#ifndef DEBUG
#    error Probably kernel does not produce statistic for this program
#endif
  
int main()
{
    int i;
    int debug_fifo;

    printf("TASK 1 \"UNO\"\nTASK 2 \"DOS\"\nTASK 3 \"TRES\"\n");
    printf("TASK 4 \"CUATRO\"\nTASK 5 \"CINCO\"\nTASK 6 \"SEIS\"\n:BODY\n");

    debug_fifo = open ("/dev/rtf5",O_RDONLY);
    if ( debug_fifo == -1 ) {
	printf("rtf5: not such device\n");
	exit(1);
    }

    for (i=0; i<1000 ; i++) {  
	read( debug_fifo, (char *) &ev2, sizeof(event_info));
	if ( i==0 ) ev1 = ev2;
    
	printf("%s %d %d %d\n", 
	    (ev2.state== EXEC) ? "EXEC": "ACTI",
	    ev2.id, 
	    (int) ((ev2.in-ev1.in)/10), 
	    (int) ((ev2.out-ev1.in)/10));
    }
    close(debug_fifo);
    return 0;
}