X-Git-Url: https://git.lttng.org/?a=blobdiff_plain;f=src%2Fbin%2Flttng-sessiond%2Fsessiond-timer.h;fp=src%2Fbin%2Flttng-sessiond%2Fsessiond-timer.h;h=e1b8a7eaded2d0a23ac34dad435611d319d90f19;hb=d086f507d02078aed618ab291a0bc4a634958fa3;hp=0000000000000000000000000000000000000000;hpb=4f5fb4c3d8752aae822ed0066784cc77e6f0f508;p=lttng-tools.git

diff --git a/src/bin/lttng-sessiond/sessiond-timer.h b/src/bin/lttng-sessiond/sessiond-timer.h
new file mode 100644
index 000000000..e1b8a7ead
--- /dev/null
+++ b/src/bin/lttng-sessiond/sessiond-timer.h
@@ -0,0 +1,57 @@
+/*
+ * Copyright (C) 2017 - Julien Desfossez <jdesfossez@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.
+ *
+ * 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.
+ */
+
+#ifndef SESSIOND_TIMER_H
+#define SESSIOND_TIMER_H
+
+#include <pthread.h>
+
+#include "session.h"
+
+#define LTTNG_SESSIOND_SIG_TEARDOWN		SIGRTMIN + 10
+#define LTTNG_SESSIOND_SIG_EXIT			SIGRTMIN + 11
+
+#define CLOCKID CLOCK_MONOTONIC
+
+/*
+ * Handle timer teardown race wrt memory free of private data by sessiond
+ * signals are handled by a single thread, which permits a synchronization
+ * point between handling of each signal. Internal lock ensures mutual
+ * exclusion.
+ */
+struct timer_signal_data {
+	/* Thread managing signals. */
+	pthread_t tid;
+	int qs_done;
+	pthread_mutex_t lock;
+};
+
+struct timer_thread_parameters {
+	struct rotation_thread_timer_queue *rotation_timer_queue;
+};
+
+struct sessiond_rotation_timer {
+	uint64_t session_id;
+	unsigned int signal;
+	/* List member in struct rotation_thread_timer_queue. */
+	struct cds_list_head head;
+};
+
+void *sessiond_timer_thread(void *data);
+int sessiond_timer_signal_init(void);
+
+#endif /* SESSIOND_TIMER_H */