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, 0 deletions

diff --git a/src/mesa/main/texobj.h b/src/mesa/main/texobj.h
index 2a2bde36017..d5374c5d6c4 100644
--- a/src/mesa/main/texobj.h
+++ b/src/mesa/main/texobj.h
@@ -58,6 +58,10 @@ _mesa_copy_texture_object( struct gl_texture_object *dest,
                            const struct gl_texture_object *src );
 
 extern void
+_mesa_reference_texobj(struct gl_texture_object **ptr,
+                       struct gl_texture_object *tex);
+
+extern void
 _mesa_test_texobj_completeness( const GLcontext *ctx,
                                 struct gl_texture_object *obj );