[Bf-blender-cvs] [263cf2ea945] blender-v2.90-release: Enabled workaround to solve threading issues in draw manager

[Jeroen Bakker]

Commit: 263cf2ea945ac1224023f92a9767111956ecca24
Author: Jeroen Bakker
Date:   Tue Aug 25 11:48:48 2020 +0200
Branches: blender-v2.90-release
https://developer.blender.org/rB263cf2ea945ac1224023f92a9767111956ecca24

Enabled workaround to solve threading issues in draw manager

This workaround addresses T79533 and T79038 for Blender 2.90. The
solution isn't clear and needs more research and work. In order to
continue with blender 2.90 release it was proposed to add this work
around.

It has been tested with the test files provided in the reports.

Reviewed By: Dalai Felinto, Clément Foucault

Differential Revision: https://developer.blender.org/D8695

===================================================================

M	source/blender/draw/intern/draw_cache_impl_mesh.c

===================================================================

diff --git a/source/blender/draw/intern/draw_cache_impl_mesh.c b/source/blender/draw/intern/draw_cache_impl_mesh.c
index 361c66eca6e..d3a057b1016 100644
--- a/source/blender/draw/intern/draw_cache_impl_mesh.c
+++ b/source/blender/draw/intern/draw_cache_impl_mesh.c
@@ -1549,6 +1549,9 @@ void DRW_mesh_batch_cache_create_requested(struct TaskGraph *task_graph,
                                      scene,
                                      ts,
                                      use_hide);
+  /* TODO(jbakker): Work-around for threading issues in 2.90. See T79533, T79038. Needs to be
+   * solved or made permanent in 2.91. Underlying issue still needs to be researched. */
+  BLI_task_graph_work_and_wait(task_graph);
 #ifdef DEBUG
   drw_mesh_batch_cache_check_available(task_graph, me);
 #endif