Minor library change that I forgot to add to the last commit. Adds a method to asynchronous queues that checks to available write space in the queue.

common/JackMidiAsyncQueue.cpp

@@ -94,3 +94,10 @@ JackMidiAsyncQueue::EnqueueEvent(jack_nframes_t time, size_t size,
     jack_ringbuffer_write(info_ring, (const char *) (&size), sizeof(size_t));
     return OK;
 }
+
+size_t
+JackMidiAsyncQueue::GetAvailableSpace()
+{
+    return jack_ringbuffer_write_space(info_ring) < INFO_SIZE ? 0 :
+        max_bytes - jack_ringbuffer_read_space(byte_ring);
+}

common/JackMidiAsyncQueue.h

@@ -84,6 +84,13 @@ namespace Jack {
         EnqueueEvent(jack_nframes_t time, size_t size,
                      jack_midi_data_t *buffer);
 
+        /**
+         * Returns the maximum size event that can be enqueued right *now*.
+         */
+
+        size_t
+        GetAvailableSpace();
+
     };
 
 }