OpenSubdiv: Use pool for delayed OpenGL buffers free when freeing from non-main thread

This is really similar to what GPU module was already doing. There are number of
possible improvements still:

- Re-use allocated VAOs when requesting new ones instead of going to the trouble
  of freeing VAO and then re-creating it again.

- Move VAO handling to GPU module.

Fixes T46589: OpenSubdiv crash with drivers

1 files changed, 8 insertions, 0 deletions

diff --git a/source/blender/blenkernel/intern/CCGSubSurf_intern.h b/source/blender/blenkernel/intern/CCGSubSurf_intern.h
index e2b42065382..e0771020350 100644
--- a/source/blender/blenkernel/intern/CCGSubSurf_intern.h
+++ b/source/blender/blenkernel/intern/CCGSubSurf_intern.h
@@ -303,6 +303,14 @@ void ccgSubSurf__sync_legacy(CCGSubSurf *ss);
 
 void ccgSubSurf__sync_opensubdiv(CCGSubSurf *ss);
 
+/* Delayed free routines. Will do actual free if called from
+ * main thread and schedule free for later free otherwise.
+ */
+
+void ccgSubSurf__delete_osdGLMesh(struct OpenSubdiv_GLMesh *osd_mesh);
+void ccgSubSurf__delete_vertex_array(unsigned int vao);
+void ccgSubSurf__delete_pending(void);
+
 /* * CCGSubSurf_opensubdiv_converter.c * */
 
 struct OpenSubdiv_Converter;