BLI: support disabling task isolation in task pool

Under some circumstances using task isolation can cause deadlocks.
Previously, our task pool implementation would run all tasks in an
isolated region. Now using task isolation is optional and can be
turned on/off for individual task pools.

Task pools that spawn new tasks recursively should never enable
task isolation. There is a new check that finds these cases at runtime.
Right now this check is disabled, so that this commit is a pure refactor.
It will be enabled in an upcoming commit.

This fixes T88598.

Differential Revision: https://developer.blender.org/D11415

1 files changed, 2 insertions, 2 deletions

diff --git a/source/blender/gpencil_modifiers/intern/lineart/lineart_cpu.c b/source/blender/gpencil_modifiers/intern/lineart/lineart_cpu.c
index d623a553ab8..98b24be0d54 100644
--- a/source/blender/gpencil_modifiers/intern/lineart/lineart_cpu.c
+++ b/source/blender/gpencil_modifiers/intern/lineart/lineart_cpu.c
@@ -482,7 +482,7 @@ static void lineart_main_occlusion_begin(LineartRenderBuffer *rb)
   rb->material.last = rb->material.first;
   rb->edge_mark.last = rb->edge_mark.first;
 
-  TaskPool *tp = BLI_task_pool_create(NULL, TASK_PRIORITY_HIGH);
+  TaskPool *tp = BLI_task_pool_create(NULL, TASK_PRIORITY_HIGH, TASK_ISOLATION_ON);
 
   for (i = 0; i < thread_count; i++) {
     rti[i].thread_id = i;
@@ -1987,7 +1987,7 @@ static void lineart_main_load_geometries(
   }
   DEG_OBJECT_ITER_END;
 
-  TaskPool *tp = BLI_task_pool_create(NULL, TASK_PRIORITY_HIGH);
+  TaskPool *tp = BLI_task_pool_create(NULL, TASK_PRIORITY_HIGH, TASK_ISOLATION_ON);
 
   for (int i = 0; i < thread_count; i++) {
     olti[i].rb = rb;