feat(ipc/server): make runner thread detached

The socket thread will be used in pthread_join, but the run thread
must be detached, and will not be joined.

Signed-off-by: Marco Casaroli <marco.casaroli@gmail.com>

Author: casaroli

src/samples/supervisor/posix/server/runners.c

@@ -129,6 +129,7 @@ static void *socket_thread(void *arg)
 int container_runner_dispatch(struct ocre_container *container, int socket)
 {
 	struct runner *runner = NULL;
+	pthread_attr_t attr;
 
 	runner = malloc(sizeof(struct runner));
 	if (!runner) {
@@ -147,18 +148,37 @@ int container_runner_dispatch(struct ocre_container *container, int socket)
 		goto error_runner;
 	}
 
+	rc = pthread_attr_init(&attr);
+	if (rc) {
+		fprintf(stderr, "Failed to initialize thread attributes: rc=%d", rc);
+		goto error_mutex;
+	}
+
+	rc = pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
+	if (rc) {
+		fprintf(stderr, "Failed to initialize thread attributes: rc=%d", rc);
+		goto error_attr;
+	}
+
+	/* The socket thread is joinable */
 	rc = pthread_create(&runner->socket_thread, NULL, socket_thread, runner);
 	if (rc) {
 		fprintf(stderr, "Failed to create socket thread: rc=%d", rc);
 		goto error_mutex;
 	}
 
-	rc = pthread_create(&runner->run_thread, NULL, run_thread, runner);
+	/* The run_thread is detached */
+	rc = pthread_create(&runner->run_thread, &attr, run_thread, runner);
 	if (rc) {
 		fprintf(stderr, "Failed to create runner thread: rc=%d", rc);
 		goto error_thread;
 	}
 
+	rc = pthread_attr_destroy(&attr);
+	if (rc) {
+		fprintf(stderr, "Failed to destroy thread attributes: rc=%d", rc);
+	}
+
 	return 0;
 
 error_thread:
@@ -176,6 +196,12 @@ int container_runner_dispatch(struct ocre_container *container, int socket)
 
 	pthread_join(runner->socket_thread, NULL);
 
+error_attr:
+	rc = pthread_attr_destroy(&attr);
+	if (rc) {
+		fprintf(stderr, "Failed to destroy thread attributes: rc=%d", rc);
+	}
+
 error_mutex:
 	pthread_mutex_destroy(&runner->mutex);