Bài tóan đèn hiệu P1, P2, P3 chờ xoay vòng

Cac ban tham khao nhe..


Bài tóan đèn hiệu P1, P2, P3 chờ xoay vòng
P1:


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


HANDLE semSynch31;
HANDLE semSynch12;

int main()
{
semSynch31=CreateSemaphore(0, 0, 1, "SYNCH31");
semSynch12=CreateSemaphore(0, 0, 1, "SYNCH12");

printf("P1 chay xong ! \n\n");
printf("Bam phim bat ky de P2 chay tiep:");
getch();

ReleaseSemaphore(semSynch12, 1, 0);

while(true)
{
printf("\nCho P3 chay xong .... \n");
WaitForSingleObject(semSynch31,INFINITE);

printf("P1 chay xong ! \n\n");
printf("Bam phim bat ky de P2 chay tiep:\n");
getch();

ReleaseSemaphore(semSynch12, 1, 0);
}
return 0;
}

//====================================
P2:


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

HANDLE semSynch12;
HANDLE semSynch23;


int main()
{
semSynch12=CreateSemaphore(0, 0, 1, "SYNCH12");
semSynch23=CreateSemaphore(0, 0, 1, "SYNCH23");

while(true)
{
printf("\nCho P1 chay xong .. \n");
WaitForSingleObject(semSynch12,INFINITE);

printf("P2 chay xong ! \n\n");
printf("Bam phim bat ky de P3 chay tiep:\n");
getch();

ReleaseSemaphore(semSynch23, 1, 0);
}
return 0;
}

//=======================================
P3


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

HANDLE semSynch23;
HANDLE semSynch31;


int main()
{
semSynch23=CreateSemaphore(0, 0, 1, "SYNCH23");
semSynch31=CreateSemaphore(0, 0, 1, "SYNCH31");

while(true)
{
printf("\nCho P2 chay xong ..\n");
WaitForSingleObject(semSynch23,INFINITE);

printf("P3 chay xong ! \n\n");
printf("Bam phim bat ky de P1 chay tiep:\n");
getch();

ReleaseSemaphore(semSynch31, 1, 0);
}
return 0;
}
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