X-Git-Url: http://git.efficios.com/?p=lttng-tools.git;a=blobdiff_plain;f=src%2Fbin%2Flttng-sessiond%2Fnotification-thread.c;h=c47b36533e2bdef05ad3ba4c609b9382e10856ed;hp=b580faa2682e1fa7a3a632fc095d93af3ef41b5d;hb=814b4934e2604a419bcb8eec57c0450dbb47e2c3;hpb=4a171f3e17f4799d52e13d385f195fd459b8d008

diff --git a/src/bin/lttng-sessiond/notification-thread.c b/src/bin/lttng-sessiond/notification-thread.c
index b580faa26..c47b36533 100644
--- a/src/bin/lttng-sessiond/notification-thread.c
+++ b/src/bin/lttng-sessiond/notification-thread.c
@@ -54,17 +54,12 @@ void notification_thread_handle_destroy(
 		goto end;
 	}
 
-	if (handle->cmd_queue.event_fd < 0) {
-		goto end;
-	}
-	ret = close(handle->cmd_queue.event_fd);
-	if (ret < 0) {
-		PERROR("close notification command queue event_fd");
-	}
-
 	assert(cds_list_empty(&handle->cmd_queue.list));
 	pthread_mutex_destroy(&handle->cmd_queue.lock);
 
+	if (handle->cmd_queue.event_pipe) {
+		lttng_pipe_destroy(handle->cmd_queue.event_pipe);
+	}
 	if (handle->channel_monitoring_pipes.ust32_consumer >= 0) {
 		ret = close(handle->channel_monitoring_pipes.ust32_consumer);
 		if (ret) {
@@ -94,18 +89,22 @@ struct notification_thread_handle *notification_thread_handle_create(
 {
 	int ret;
 	struct notification_thread_handle *handle;
+	struct lttng_pipe *event_pipe = NULL;
 
 	handle = zmalloc(sizeof(*handle));
 	if (!handle) {
 		goto end;
 	}
 
-	/* FIXME Replace eventfd by a pipe to support older kernels. */
-	handle->cmd_queue.event_fd = eventfd(0, EFD_CLOEXEC | EFD_SEMAPHORE);
-	if (handle->cmd_queue.event_fd < 0) {
-		PERROR("eventfd notification command queue");
+	event_pipe = lttng_pipe_open(O_CLOEXEC);
+	if (!event_pipe) {
+		ERR("event_pipe creation");
 		goto error;
 	}
+
+	handle->cmd_queue.event_pipe = event_pipe;
+	event_pipe = NULL;
+
 	CDS_INIT_LIST_HEAD(&handle->cmd_queue.list);
 	ret = pthread_mutex_init(&handle->cmd_queue.lock, NULL);
 	if (ret) {
@@ -145,6 +144,7 @@ struct notification_thread_handle *notification_thread_handle_create(
 end:
 	return handle;
 error:
+	lttng_pipe_destroy(event_pipe);
 	notification_thread_handle_destroy(handle);
 	return NULL;
 }
@@ -282,7 +282,7 @@ int init_poll_set(struct lttng_poll_event *poll_set,
 		ERR("[notification-thread] Failed to add notification channel socket to pollset");
 		goto error;
 	}
-	ret = lttng_poll_add(poll_set, handle->cmd_queue.event_fd,
+	ret = lttng_poll_add(poll_set, lttng_pipe_get_readfd(handle->cmd_queue.event_pipe),
 			LPOLLIN | LPOLLERR);
 	if (ret < 0) {
 		ERR("[notification-thread] Failed to add notification command queue event fd to pollset");
@@ -544,7 +544,7 @@ void *thread_notification(void *data)
 					ERR("[notification-thread] Unexpected poll events %u for notification socket %i", revents, fd);
 					goto error;
 				}
-			} else if (fd == handle->cmd_queue.event_fd) {
+			} else if (fd == lttng_pipe_get_readfd(handle->cmd_queue.event_pipe)) {
 				ret = handle_notification_thread_command(handle,
 						&state);
 				if (ret < 0) {