Add a trash pool for invalidation requests.

While EventLoop::invalidate_request() does invalidate request in the
request-list. It does *not* invalidate requests in the
per-thread-request-ringbuffer(s).
The invalidation record cannot be deleted in EventLoop::invalidate_request
see 6b5891a78f.

1 files changed, 3 insertions, 2 deletions

diff --git a/libs/pbd/event_loop.cc b/libs/pbd/event_loop.cc
index 0baba2835a..aae0c21a08 100644
--- a/libs/pbd/event_loop.cc
+++ b/libs/pbd/event_loop.cc
@@ -95,8 +95,9 @@ EventLoop::invalidate_request (void* data)
 				(*i)->invalidation = 0;
 			}
 		}
-		// should this not always be deleted, regardless if there's an event_loop?
-		delete ir;
+		// This invalidation record may still be in-use in per-thread-request-ringbuffer.
+		// it cannot be deleted here,
+		ir->event_loop->trash.push_back(ir);
 	} else {
 		DEBUG_TRACE (PBD::DEBUG::AbstractUI, string_compose ("EventLoop::invalidate_request no event-loop for invalidation %1\n", ir));
 	}