common: reltimer_arg to access a timer argument.

Signed-off-by: Rusty Russell <[email protected]>

Author: rustyrussell

common/timeout.c

@@ -30,6 +30,11 @@ struct oneshot *new_reltimer_(struct timers *timers,
 	return t;
 }
 
+void *reltimer_arg(struct oneshot *t)
+{
+	return t->arg;
+}
+
 void timer_expired(tal_t *ctx, struct timer *timer)
 {
 	struct oneshot *t = container_of(timer, struct oneshot, timer);

common/timeout.h

@@ -15,6 +15,9 @@ struct oneshot *new_reltimer_(struct timers *timers,
 	new_reltimer_((timers), (ctx), (relexpire),			\
 		      typesafe_cb(void, void *, (func), (arg)), (arg))
 
+/* Get timer arg. */
+void *reltimer_arg(struct oneshot *t);
+
 void timer_expired(tal_t *ctx, struct timer *timer);
 
 #endif /* LIGHTNING_COMMON_TIMEOUT_H */