Code cleanups.

[TD_SE.git] / threads / exemple1.c

//exemple1.c

#define _REENTRANT
#include <pthread.h>
#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>

static void afficher(int n, char lettre)
{
	int j;
	for (j = 1; j < n; j++) {
		printf("%c", lettre);
		fflush(stdout);
	}
}

static void *threadA(void *inutilise)
{
	afficher(100, 'A');
	printf("\n Fin du thread A\n");
	fflush(stdout);
	pthread_exit(NULL);
}

static void *threadC(void *inutilise)
{
	afficher(150, 'C');
	printf("\n Fin du thread C\n");
	fflush(stdout);
	pthread_exit(NULL);
}

static void *threadB(void *inutilise)
{
	pthread_t thC;
	pthread_create(&thC, NULL, threadC, NULL);
	afficher(100, 'B');
	printf("\n Le thread B attend la fin du thread C\n");
	pthread_join(thC, NULL);
	printf("\n Fin du thread B\n");
	fflush(stdout);
	pthread_exit(NULL);
}

int main()
{
	pthread_t thA, thB;
	printf("Création du Thread A\n");
	pthread_create(&thA, NULL, threadA, NULL);
	pthread_create(&thB, NULL, threadB, NULL);
	sleep(1);		// simule un traitement
	printf("Le processus principal attend que les autres se terminent\n");
	// attendre la fin des threads
	pthread_join(thA, NULL);
	pthread_join(thB, NULL);
	exit(0);
}