From 40bd35c9c45b0dc7b8ebda3c7a2f65b82ceae18a Mon Sep 17 00:00:00 2001
From: Hans Goudey <h.goudey@me.com>
Date: Wed, 22 Mar 2023 08:50:27 -0400
Subject: [PATCH] BLI: Add dirty and cached checks to shared cache

While these aren't needed that often, it can be helpful to avoid
using a cache if it isn't necessary and it doesn't already exist.
---
 source/blender/blenlib/BLI_shared_cache.hh | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/source/blender/blenlib/BLI_shared_cache.hh b/source/blender/blenlib/BLI_shared_cache.hh
index 2f95c97d50c..ebb1c81cfc3 100644
--- a/source/blender/blenlib/BLI_shared_cache.hh
+++ b/source/blender/blenlib/BLI_shared_cache.hh
@@ -64,6 +64,22 @@ template<typename T> class SharedCache {
     BLI_assert(cache_->mutex.is_cached());
     return cache_->data;
   }
+
+  /**
+   * Return true if the cache currently does not exist or has been invalidated.
+   */
+  bool is_dirty() const
+  {
+    return cache_->mutex.is_dirty();
+  }
+
+  /**
+   * Return true if the cache exists and is valid.
+   */
+  bool is_cached() const
+  {
+    return cache_->mutex.is_cached();
+  }
 };
 
 }  // namespace blender