Fix: check for removal of session's shm_path in destroy()

[lttng-tools.git] / src / bin / lttng-sessiond / cmd.h

diff --git a/src/bin/lttng-sessiond/cmd.h b/src/bin/lttng-sessiond/cmd.h
index 6a6c87eaa0b6ea303f11afb63e27c8243bc23857..79ff689c33c970ab25298aed7e9699bea58def83 100644 (file)
--- a/src/bin/lttng-sessiond/cmd.h
+++ b/src/bin/lttng-sessiond/cmd.h
@@ -23,6 +23,20 @@
 
 struct notification_thread_handle;
 
+/*
+ * A callback (and associated user data) that should be run after a command
+ * has been executed. No locks should be taken while executing this handler.
+ *
+ * The command's reply should not be sent until the handler has run and
+ * completed successfully. On failure, the handler's return code should
+ * be the only reply sent to the client.
+ */
+typedef enum lttng_error_code (*completion_handler_function)(void *);
+struct cmd_completion_handler {
+       completion_handler_function run;
+       void *data;
+};
+
 /*
  * Init the command subsystem. Must be called before using any of the functions
  * above. This is called in the main() of the session daemon.
@@ -130,4 +144,6 @@ int cmd_rotation_set_schedule(struct ltt_session *session, uint64_t timer_us,
                uint64_t size,
                struct notification_thread_handle *notification_thread_handle);
 
+const struct cmd_completion_handler *cmd_pop_completion_handler(void);
+
 #endif /* CMD_H */