Signal handling cleanup and improved safety

Fixes issue where you couldn't control-C out of a loop (https://github.com/ridiculousfish/fishfish/issues/13)
Also stops doing memory allocation in the signal handler (oops) https://github.com/ridiculousfish/fishfish/issues/27

1 files changed, 9 insertions, 0 deletions

diff --git a/event.h b/event.h
index 402b3594..c176a50a 100644
--- a/event.h
+++ b/event.h
@@ -123,6 +123,12 @@ void event_remove( event_t *event );
 int event_get( event_t *criterion, std::vector<event_t *> *out );
 
 /**
+    Returns whether an event listener is registered for the given signal.
+    This is safe to call from a signal handler.
+*/
+bool event_is_signal_observed(int signal);
+
+/**
    Fire the specified event. The function_name field of the event must
    be set to 0. If the event is of type EVENT_SIGNAL, no the event is
    queued, and will be dispatched the next time event_fire is
@@ -140,6 +146,9 @@ int event_get( event_t *criterion, std::vector<event_t *> *out );
 */
 void event_fire( event_t *event );
 
+/** Like event_fire, but takes a signal directly. */
+void event_fire_signal(int signal);
+
 /**
    Initialize the event-handling library
 */