mesa: Custom thread marshalling for Flush.

Acked-by: Timothy Arceri <tarceri@itsqueeze.com>
Acked-by: Marek Olšák <maraeo@gmail.com>
Tested-by: Dieter Nützel <Dieter@nuetzel-hh.de>
Tested-by: Mike Lothian <mike@fireburn.co.uk>

src/mapi/glapi/gen/gl_API.xml

@@ -2377,8 +2377,7 @@
     specially to ensure that it causes all previous commands to get
     delivered to the server thread.
     -->
-
-    <function name="Flush" es1="1.0" es2="2.0" marshal="sync">
+    <function name="Flush" es1="1.0" es2="2.0" marshal="custom">
         <glx sop="142" handcode="true"/>
     </function>
 

src/mesa/main/marshal.c

@@ -31,6 +31,39 @@
 #include "dispatch.h"
 #include "marshal_generated.h"
 
+struct marshal_cmd_Flush
+{
+   struct marshal_cmd_base cmd_base;
+};
+
+
+void
+_mesa_unmarshal_Flush(struct gl_context *ctx,
+                      const struct marshal_cmd_Flush *cmd)
+{
+   CALL_Flush(ctx->CurrentServerDispatch, ());
+}
+
+
+void GLAPIENTRY
+_mesa_marshal_Flush(void)
+{
+   GET_CURRENT_CONTEXT(ctx);
+   struct marshal_cmd_Flush *cmd =
+      _mesa_glthread_allocate_command(ctx, DISPATCH_CMD_Flush,
+                                      sizeof(struct marshal_cmd_Flush));
+   (void) cmd;
+   _mesa_post_marshal_hook(ctx);
+
+   /* Flush() needs to be handled specially.  In addition to telling the
+    * background thread to flush, we need to ensure that our own buffer is
+    * submitted to the background thread so that it will complete in a finite
+    * amount of time.
+    */
+   _mesa_glthread_flush_batch(ctx);
+}
+
+
 struct marshal_cmd_ShaderSource
 {
    struct marshal_cmd_base cmd_base;

src/mesa/main/marshal.h

@@ -110,6 +110,7 @@ _mesa_post_marshal_hook(struct gl_context *ctx)
 }
 
 struct marshal_cmd_ShaderSource;
+struct marshal_cmd_Flush;
 
 void GLAPIENTRY
 _mesa_marshal_ShaderSource(GLuint shader, GLsizei count,
@@ -119,4 +120,11 @@ void
 _mesa_unmarshal_ShaderSource(struct gl_context *ctx,
                              const struct marshal_cmd_ShaderSource *cmd);
 
+void GLAPIENTRY
+_mesa_marshal_Flush(void);
+
+void
+_mesa_unmarshal_Flush(struct gl_context *ctx,
+                      const struct marshal_cmd_Flush *cmd);
+
 #endif /* MARSHAL_H */