From: Jérémie Galarneau <jeremie.galarneau@efficios.com>
Date: Fri, 30 Nov 2018 17:12:12 +0000 (-0500)
Subject: Launch the timer thread using lttng_thread
X-Git-Tag: v2.12.0-rc1~724
X-Git-Url: https://git.lttng.org./?a=commitdiff_plain;h=bc26e826ebd59d3888e6db0d4985cfb3444f5c09;p=lttng-tools.git

Launch the timer thread using lttng_thread

Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
---

diff --git a/src/bin/lttng-sessiond/main.c b/src/bin/lttng-sessiond/main.c
index 0c207309d..c82e0095b 100644
--- a/src/bin/lttng-sessiond/main.c
+++ b/src/bin/lttng-sessiond/main.c
@@ -194,7 +194,6 @@ static pthread_t kernel_thread;
 static pthread_t dispatch_thread;
 static pthread_t agent_reg_thread;
 static pthread_t load_session_thread;
-static pthread_t timer_thread;
 
 /*
  * UST registration command queue. This queue is tied with a futex and uses a N
@@ -5492,9 +5491,8 @@ int main(int argc, char **argv)
 	struct lttng_pipe *ust32_channel_monitor_pipe = NULL,
 			*ust64_channel_monitor_pipe = NULL,
 			*kernel_channel_monitor_pipe = NULL;
-	bool timer_thread_launched = false;
 	struct lttng_thread *ht_cleanup_thread = NULL;
-	struct timer_thread_parameters timer_thread_ctx;
+	struct timer_thread_parameters timer_thread_parameters;
 	/* Rotation thread handle. */
 	struct rotation_thread_handle *rotation_thread_handle = NULL;
 	/* Queue of rotation jobs populated by the sessiond-timer. */
@@ -5693,7 +5691,8 @@ int main(int argc, char **argv)
 		retval = -1;
 		goto exit_init_data;
 	}
-	timer_thread_ctx.rotation_thread_job_queue = rotation_timer_queue;
+	timer_thread_parameters.rotation_thread_job_queue =
+			rotation_timer_queue;
 
 	ust64_channel_monitor_pipe = lttng_pipe_open(0);
 	if (!ust64_channel_monitor_pipe) {
@@ -5862,20 +5861,13 @@ int main(int argc, char **argv)
 	if (!launch_notification_thread(notification_thread_handle)) {
 		retval = -1;
 		goto exit_notification;
-
 	}
 
 	/* Create timer thread. */
-	ret = pthread_create(&timer_thread, default_pthread_attr(),
-			timer_thread_func, &timer_thread_ctx);
-	if (ret) {
-		errno = ret;
-		PERROR("pthread_create timer");
+	if (!launch_timer_thread(&timer_thread_parameters)) {
 		retval = -1;
-		stop_threads();
 		goto exit_notification;
 	}
-	timer_thread_launched = true;
 
 	/* rotation_thread_data acquires the pipes' read side. */
 	rotation_thread_handle = rotation_thread_handle_create(
@@ -6089,16 +6081,6 @@ exit_init_data:
 	 */
 	rcu_barrier();
 
-	if (timer_thread_launched) {
-		timer_exit();
-		ret = pthread_join(timer_thread, &status);
-		if (ret) {
-			errno = ret;
-			PERROR("pthread_join timer thread");
-			retval = -1;
-		}
-	}
-
 	if (ht_cleanup_thread) {
 		lttng_thread_shutdown(ht_cleanup_thread);
 		lttng_thread_put(ht_cleanup_thread);
diff --git a/src/bin/lttng-sessiond/timer.c b/src/bin/lttng-sessiond/timer.c
index fa5e95cf1..991576765 100644
--- a/src/bin/lttng-sessiond/timer.c
+++ b/src/bin/lttng-sessiond/timer.c
@@ -24,6 +24,7 @@
 #include "timer.h"
 #include "health-sessiond.h"
 #include "rotation-thread.h"
+#include "thread.h"
 
 #define LTTNG_SESSIOND_SIG_QS				SIGRTMIN + 10
 #define LTTNG_SESSIOND_SIG_EXIT				SIGRTMIN + 11
@@ -344,7 +345,8 @@ int timer_signal_init(void)
 /*
  * This thread is the sighandler for the timer signals.
  */
-void *timer_thread_func(void *data)
+static
+void *thread_timer(void *data)
 {
 	int signr;
 	sigset_t mask;
@@ -414,7 +416,27 @@ end:
 	return NULL;
 }
 
-void timer_exit(void)
+static
+bool shutdown_timer_thread(void *data)
+{
+	return kill(getpid(), LTTNG_SESSIOND_SIG_EXIT) == 0;
+}
+
+bool launch_timer_thread(
+		struct timer_thread_parameters *timer_thread_parameters)
 {
-	kill(getpid(), LTTNG_SESSIOND_SIG_EXIT);
+	struct lttng_thread *thread;
+
+	thread = lttng_thread_create("Timer",
+			thread_timer,
+			shutdown_timer_thread,
+			NULL,
+			timer_thread_parameters);
+	if (!thread) {
+		goto error;
+	}
+	lttng_thread_put(thread);
+	return true;
+error:
+	return false;
 }
diff --git a/src/bin/lttng-sessiond/timer.h b/src/bin/lttng-sessiond/timer.h
index 83be4873c..1e8178cae 100644
--- a/src/bin/lttng-sessiond/timer.h
+++ b/src/bin/lttng-sessiond/timer.h
@@ -20,6 +20,7 @@
 #define SESSIOND_TIMER_H
 
 #include <pthread.h>
+#include <stdbool.h>
 
 #include "session.h"
 
@@ -28,9 +29,6 @@ struct timer_thread_parameters {
 };
 
 int timer_signal_init(void);
-void *timer_thread_func(void *data);
-
-void timer_exit(void);
 
 /* Start a session's rotation pending check timer (one-shot mode). */
 int timer_session_rotation_pending_check_start(struct ltt_session *session,
@@ -44,4 +42,7 @@ int timer_session_rotation_schedule_timer_start(struct ltt_session *session,
 /* Stop a session's rotation schedule timer. */
 int timer_session_rotation_schedule_timer_stop(struct ltt_session *session);
 
+bool launch_timer_thread(
+		struct timer_thread_parameters *timer_thread_parameters);
+
 #endif /* SESSIOND_TIMER_H */