mesa/glthread: pass the function name to _mesa_glthread_restore_dispatch

If you insert printf there, you'll know why glthread was disabled.

Reviewed-by: Timothy Arceri <tarceri@itsqueeze.com>

src/mapi/glapi/gen/gl_marshal.py

@@ -249,7 +249,7 @@ class PrintCode(gl_XML.gl_print_base):
                 out('if ({0}) {{'.format(func.marshal_fail))
                 with indent():
                     out('_mesa_glthread_finish(ctx);')
-                    out('_mesa_glthread_restore_dispatch(ctx);')
+                    out('_mesa_glthread_restore_dispatch(ctx, __func__);')
                     self.print_sync_dispatch(func)
                     out('return;')
                 out('}')

src/mesa/main/glthread.c

@@ -121,11 +121,11 @@ _mesa_glthread_destroy(struct gl_context *ctx)
    free(glthread);
    ctx->GLThread = NULL;
 
-   _mesa_glthread_restore_dispatch(ctx);
+   _mesa_glthread_restore_dispatch(ctx, "destroy");
 }
 
 void
-_mesa_glthread_restore_dispatch(struct gl_context *ctx)
+_mesa_glthread_restore_dispatch(struct gl_context *ctx, const char *func)
 {
    /* Remove ourselves from the dispatch table except if another ctx/thread
     * already installed a new dispatch table.
@@ -136,6 +136,9 @@ _mesa_glthread_restore_dispatch(struct gl_context *ctx)
    if (_glapi_get_dispatch() == ctx->MarshalExec) {
        ctx->CurrentClientDispatch = ctx->CurrentServerDispatch;
        _glapi_set_dispatch(ctx->CurrentClientDispatch);
+#if 0
+       printf("glthread disabled: %s\n", func);
+#endif
    }
 }
 

src/mesa/main/glthread.h

@@ -99,7 +99,7 @@ struct glthread_state
 void _mesa_glthread_init(struct gl_context *ctx);
 void _mesa_glthread_destroy(struct gl_context *ctx);
 
-void _mesa_glthread_restore_dispatch(struct gl_context *ctx);
+void _mesa_glthread_restore_dispatch(struct gl_context *ctx, const char *func);
 void _mesa_glthread_flush_batch(struct gl_context *ctx);
 void _mesa_glthread_finish(struct gl_context *ctx);
 

src/mesa/main/marshal.c

@@ -89,7 +89,7 @@ _mesa_marshal_Enable(GLenum cap)
 
    if (cap == GL_DEBUG_OUTPUT_SYNCHRONOUS_ARB) {
       _mesa_glthread_finish(ctx);
-      _mesa_glthread_restore_dispatch(ctx);
+      _mesa_glthread_restore_dispatch(ctx, "Enable(DEBUG_OUTPUT_SYNCHRONOUS)");
    } else {
       cmd = _mesa_glthread_allocate_command(ctx, DISPATCH_CMD_Enable,
                                             sizeof(*cmd));