p3.c

来自「geekos 0.3.0简单的操作系统」· C语言 代码 · 共 27 行

#include <conio.h>
#include <process.h>
#include <sched.h>
#include <sema.h>
#include <string.h>

int main(int argc, char** argv)
{
  int scr_sem,holdp3_sem;
  scr_sem = Create_Semaphore ( "screen" , 1 ) ;   /* register for screen use */
  holdp3_sem = Create_Semaphore ("holdp3_sem", 0);

  P(holdp3_sem);

  P ( scr_sem ) ;
  Print("p3 executed\n");
  V( scr_sem );

  V(holdp3_sem);
  
  Destroy_Semaphore(scr_sem);
  Destroy_Semaphore(holdp3_sem);

  return 0;  
}