mesa: Implement mutex/locking around texture object reference counting.

Use new _mesa_reference_texobj() function for referencing/unreferencing
textures.  Add new assertions/tests to try to detect invalid usage of
deleted textures.

cherry-picked from master (9e01b915f1243a3f551cb795b7124bd1e52ca15f)

1 files changed, 4 insertions, 9 deletions

diff --git a/src/mesa/main/framebuffer.c b/src/mesa/main/framebuffer.c
index 96f1b30c9b2..dab449fc09a 100644
--- a/src/mesa/main/framebuffer.c
+++ b/src/mesa/main/framebuffer.c
@@ -38,6 +38,7 @@
 #include "fbobject.h"
 #include "framebuffer.h"
 #include "renderbuffer.h"
+#include "texobj.h"
 
 
 
@@ -192,17 +193,11 @@ _mesa_free_framebuffer_data(struct gl_framebuffer *fb)
          _mesa_reference_renderbuffer(&att->Renderbuffer, NULL);
       }
       if (att->Texture) {
-         /* render to texture */
-         att->Texture->RefCount--;
-         if (att->Texture->RefCount == 0) {
-            GET_CURRENT_CONTEXT(ctx);
-            if (ctx) {
-               ctx->Driver.DeleteTexture(ctx, att->Texture);
-            }
-         }
+         _mesa_reference_texobj(&att->Texture, NULL);
       }
+      ASSERT(!att->Renderbuffer);
+      ASSERT(!att->Texture);
       att->Type = GL_NONE;
-      att->Texture = NULL;
    }
 
    /* unbind _Depth/_StencilBuffer to decr ref counts */