* Made QueueCommands::Write() and MakeSpace() public.

* Implemented MakeSpace() (not yet tested).
* Changed intel_wait_engine_idle() to spin() between reads and to timeout
  after 1 second of waiting (could probably be done way earlier).


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@23120 a95241bf-73f2-0310-859d-f6bbb57e9c96

headers/private/graphics/intel_extreme/intel_extreme.h

@@ -49,6 +49,7 @@ struct ring_buffer {
 	uint32			offset;
 	uint32			size;
 	uint32			position;
+	uint32			space_left;
 	uint8			*base;
 };