Adonaimedrado: Created page with ' `#include #include int x; pthread_mutex_t mutex_de_x, mutex_de_y; void minha_thread1(void null) { pthread_mutex_lock(&mutex_de_x); pr…'`


2010-08-28T07:13:41Z
Created page with '<code lang="c"> #include <stdio.h> #include <pthread.h>  int x; pthread_mutex_t mutex_de_x, mutex_de_y;  void *minha_thread1(void *null) {	 	pthread_mutex_lock(&mutex_de_x); 		pr…'
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<code lang="c">

#include <stdio.h>

#include <pthread.h>



int x;

pthread_mutex_t mutex_de_x, mutex_de_y;



void *minha_thread1(void *null)

{	

	pthread_mutex_lock(&mutex_de_x);

		printf("minha_thread1: Obtive acesso ao mutex X.\n");

		printf("minha_thread1: Aguardando 1 segundo...\n");

		sleep(1);

		printf("minha_thread1: Tentando mutex Y...\n");		

		pthread_mutex_lock(&mutex_de_y);

			printf("minha_thread1: Obtive acesso ao mutex Y.\n");

			printf("minha_thread1: Liberando mutex Y...\n");

		pthread_mutex_unlock(&mutex_de_y);

		printf("minha_thread1: Liberando mutex X...\n");

	pthread_mutex_unlock(&mutex_de_x);

	

	pthread_exit(NULL);

}



void *minha_thread2(void *null)

{	

	pthread_mutex_lock(&mutex_de_y);

		printf("minha_thread2: Obtive acesso ao mutex Y.\n");

		printf("minha_thread2: Aguardando 1 segundo...\n");

		sleep(1);

		printf("minha_thread2: Tentando mutex X...\n");		

		pthread_mutex_lock(&mutex_de_x);

			printf("minha_thread2: Obtive acesso ao mutex X.\n");

			printf("minha_thread2: Liberando mutex X...\n");

		pthread_mutex_unlock(&mutex_de_x);

		printf("minha_thread2: Liberando mutex Y...\n");

	pthread_mutex_unlock(&mutex_de_y);

	



	pthread_exit(NULL);

}



int main()

{

	int retorno_da_thread;

	pthread_t thread1, thread2;

	pthread_attr_t atributo_de_thread;



	pthread_attr_init(&atributo_de_thread);

	pthread_attr_setdetachstate(

		&atributo_de_thread, PTHREAD_CREATE_JOINABLE);



	pthread_mutex_init(&mutex_de_x,NULL);

	pthread_mutex_init(&mutex_de_y,NULL);

	

	if (pthread_create(&thread1,

		&atributo_de_thread,

		minha_thread1,NULL))

		printf("Erro ao criar a minha_thread1.\n");



	if (pthread_create(&thread2,

		&atributo_de_thread,minha_thread2,NULL))

		printf("Erro ao criar a minha_thread2.\n");



	if (pthread_join(thread1,(void **)&retorno_da_thread))

		printf("Erro no join de minha_thread1.\n");

	else

		printf("minha_thread1 joined.\n");



	if (pthread_join(thread2,(void **)&retorno_da_thread))

		printf("Erro no join de minha_thread2.\n");

	else

		printf("minha_thread2 joined.\n");

		

	pthread_mutex_destroy(&mutex_de_y);

	pthread_mutex_destroy(&mutex_de_x);



	pthread_attr_destroy(&atributo_de_thread);



	pthread_exit(NULL);

}

</code>

C: Deadlock - Revision history

Adonaimedrado: Created page with ' #include #include int x; pthread_mutex_t mutex_de_x, mutex_de_y; void *minha_thread1(void *null) { pthread_mutex_lock(&mutex_de_x); pr…'

Adonaimedrado: Created page with ' `#include #include int x; pthread_mutex_t mutex_de_x, mutex_de_y; void minha_thread1(void null) { pthread_mutex_lock(&mutex_de_x); pr…'`