semtest2.c

来自「geekos 0.3.0简单的操作系统」· C语言 代码 · 共 55 行

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

int main( int argc, char ** argv )
{
  int semkey, result;

  /* Unauthorized call */
  result = P(0);
  if (result<0)
    Print("+ Identified unauthorized call\n");
  else
    Print("- Not checking for authority\n");

  /* Invalid SID*/
  result = P(-1);
  if (result<0)
    Print("+ Identified invalid SID\n");
  else
    Print("- Not checking for invalid SID\n");
    
  Print("Create_Semaphore() called\n");
  semkey = Create_Semaphore("test", 1);
  Print("Create_Semaphore() returned %d\n", semkey);

  if (semkey < 0)
    return 0;

  Print("P() called\n");
  result = P(semkey);
  Print("P() returned %d\n", result);

  Print("V() called\n");
  result = V(semkey);
  Print("V() returned %d\n", result);


  Print("Destroy_Semaphore() called\n");
  result = Destroy_Semaphore(semkey);
  Print("Destroy_Semaphore() returned %d\n", result);

  /* Unauthorized call */
  result = V(semkey);
  if (result<0)
    Print("+ Removed authority after finish\n");
  else
    Print("- Not removed authority after finish\n");


  return 0;
}