trigger: use condition and action ref counting to ease internal objects management

[lttng-tools.git] / src / bin / lttng-sessiond / timer.c

diff --git a/src/bin/lttng-sessiond/timer.c b/src/bin/lttng-sessiond/timer.c
index d70d16710c91e7200f1a0c78f078e3d68a00c201..56fc4635a312211a8772330fcfec7c57816e407e 100644 (file)
--- a/src/bin/lttng-sessiond/timer.c
+++ b/src/bin/lttng-sessiond/timer.c
@@ -1,19 +1,9 @@
 /*
- * Copyright (C) 2017 - Julien Desfossez <jdesfossez@efficios.com>
- * Copyright (C) 2018 - Jérémie Galarneau <jeremie.galarneau@efficios.com>
+ * Copyright (C) 2017 Julien Desfossez <jdesfossez@efficios.com>
+ * Copyright (C) 2018 Jérémie Galarneau <jeremie.galarneau@efficios.com>
  *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License, version 2 only, as
- * published by the Free Software Foundation.
+ * SPDX-License-Identifier: GPL-2.0-only
  *
- * This program is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
- * more details.
- *
- * You should have received a copy of the GNU General Public License along with
- * this program; if not, write to the Free Software Foundation, Inc., 51
- * Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  */
 
 #define _LGPL_SOURCE
@@ -24,6 +14,7 @@
 #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
@@ -278,8 +269,8 @@ int timer_session_rotation_schedule_timer_start(struct ltt_session *session,
                ret = -1;
                goto end;
        }
-       DBG("Enabling scheduled rotation timer on session \"%s\" (%ui µs)", session->name,
-                       interval_us);
+       DBG("Enabling scheduled rotation timer on session \"%s\" (%ui %s)", session->name,
+                       interval_us, USEC_UNIT);
        ret = timer_start(&session->rotation_schedule_timer, session,
                        interval_us, LTTNG_SESSIOND_SIG_SCHEDULED_ROTATION,
                        /* one-shot */ false);
@@ -344,7 +335,8 @@ 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;
@@ -388,15 +380,9 @@ void *timer_thread_func(void *data)
                        struct ltt_session *session =
                                        (struct ltt_session *) info.si_value.sival_ptr;
 
-                       session_lock_list();
-                       session_lock(session);
-                       /* Acquires a reference to the session. */
                        rotation_thread_enqueue_job(ctx->rotation_thread_job_queue,
                                        ROTATION_THREAD_JOB_TYPE_CHECK_PENDING_ROTATION,
                                        session);
-                       /* Release the timer's reference to the session. */
-                       (void) timer_session_rotation_pending_check_stop(session);
-                       session_unlock_list();
                } else if (signr == LTTNG_SESSIOND_SIG_SCHEDULED_ROTATION) {
                        rotation_thread_enqueue_job(ctx->rotation_thread_job_queue,
                                        ROTATION_THREAD_JOB_TYPE_SCHEDULED_ROTATION,
@@ -420,7 +406,27 @@ end:
        return NULL;
 }
 
-void timer_exit(void)
+static
+bool shutdown_timer_thread(void *data)
 {
-       kill(getpid(), LTTNG_SESSIOND_SIG_EXIT);
+       return kill(getpid(), LTTNG_SESSIOND_SIG_EXIT) == 0;
+}
+
+bool launch_timer_thread(
+               struct timer_thread_parameters *timer_thread_parameters)
+{
+       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;
 }