disable.c

来自「vc library 韩国语版 希望对大家又帮助」· C语言 代码 · 共 48 行

#include <stdio.h>
#include <dos.h>
#include <conio.h>

#define INTR 0X1C    /* The clock tick
                        interrupt */

#ifdef __cplusplus
    #define __CPPARGS ...
#else
    #define __CPPARGS
#endif

void interrupt (*oldhandler)(__CPPARGS);

int count=0;

void interrupt handler(__CPPARGS) /* if C++, need the the 
ellipsis */
{
/* disable interrupts during the handling of the interrupt */
   disable();
/* increase the global counter */
   count++;
/* reenable interrupts at the end of the handler */
   enable();
/* call the old routine */
   oldhandler();
}

int main(void)
{
/* save the old interrupt vector */
   oldhandler = getvect(INTR);

/* install the new interrupt handler */
   setvect(INTR, handler);

/* loop until the counter exceeds 20 */
   while (count < 20)
      printf("count is %d\n",count);

/* reset the old interrupt handler */
   setvect(INTR, oldhandler);

   return 0;
}