server: add async io support

The new _ASYNC io's in qxl_dev listed at the end get six new api
functions, and an additional callback function "async_complete". When
the async version of a specific io is used, completion is notified by
calling async_complete, and no READY message is written or expected by
the dispatcher.

update_area has been changed to push QXLRects to the worker thread, where
the conversion to SpiceRect takes place.

A cookie has been added to each async call to QXLWorker, and is passed back via
async_complete.

Added api:

QXLWorker:
    update_area_async
    add_memslot_async
    destroy_surfaces_async
    destroy_primary_surface_async
    create_primary_surface_async
    destroy_surface_wait_async

QXLInterface:
    async_complete

1 files changed, 10 insertions, 0 deletions

diff --git a/server/red_worker.h b/server/red_worker.h
index b4e2ed2e..604437bf 100644
--- a/server/red_worker.h
+++ b/server/red_worker.h
@@ -70,6 +70,13 @@ enum {
     RED_WORKER_MESSAGE_RESET_IMAGE_CACHE,
     RED_WORKER_MESSAGE_DESTROY_SURFACE_WAIT,
     RED_WORKER_MESSAGE_LOADVM_COMMANDS,
+    /* async commands */
+    RED_WORKER_MESSAGE_UPDATE_ASYNC,
+    RED_WORKER_MESSAGE_ADD_MEMSLOT_ASYNC,
+    RED_WORKER_MESSAGE_DESTROY_SURFACES_ASYNC,
+    RED_WORKER_MESSAGE_CREATE_PRIMARY_SURFACE_ASYNC,
+    RED_WORKER_MESSAGE_DESTROY_PRIMARY_SURFACE_ASYNC,
+    RED_WORKER_MESSAGE_DESTROY_SURFACE_WAIT_ASYNC,
 };
 
 typedef uint32_t RedWorkerMessage;
@@ -83,6 +90,8 @@ enum {
     RED_RENDERER_OGL_PIXMAP,
 };
 
+typedef struct RedDispatcher RedDispatcher;
+
 typedef struct WorkerInitData {
     struct QXLInstance *qxl;
     int id;
@@ -100,6 +109,7 @@ typedef struct WorkerInitData {
     uint8_t memslot_id_bits;
     uint8_t internal_groupslot_id;
     uint32_t n_surfaces;
+    RedDispatcher *dispatcher;
 } WorkerInitData;
 
 void *red_worker_main(void *arg);