From bbc6bf5294f829d62ef61244c315c2886c54c790 Mon Sep 17 00:00:00 2001
From: Jordan Woyak <jordan.woyak@gmail.com>
Date: Sun, 3 Mar 2019 10:58:37 -0600
Subject: Common/Config: Add a utility class to suppress config change
 callbacks.

---
 Source/Core/Common/Config/Config.cpp | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

(limited to 'Source/Core/Common/Config/Config.cpp')

diff --git a/Source/Core/Common/Config/Config.cpp b/Source/Core/Common/Config/Config.cpp
index 30215aec06..122d2d6ff1 100644
--- a/Source/Core/Common/Config/Config.cpp
+++ b/Source/Core/Common/Config/Config.cpp
@@ -12,6 +12,7 @@ namespace Config
 {
 static Layers s_layers;
 static std::list<ConfigChangedCallback> s_callbacks;
+static u32 s_callback_guards = 0;
 
 Layers* GetLayers()
 {
@@ -53,6 +54,9 @@ void AddConfigChangedCallback(ConfigChangedCallback func)
 
 void InvokeConfigChangedCallbacks()
 {
+  if (s_callback_guards)
+    return;
+
   for (const auto& callback : s_callbacks)
     callback();
 }
@@ -137,4 +141,18 @@ LayerType GetActiveLayerForConfig(const ConfigLocation& config)
   // If config is not present in any layer, base layer is considered active.
   return LayerType::Base;
 }
+
+ConfigChangeCallbackGuard::ConfigChangeCallbackGuard()
+{
+  ++s_callback_guards;
 }
+
+ConfigChangeCallbackGuard::~ConfigChangeCallbackGuard()
+{
+  if (--s_callback_guards)
+    return;
+
+  InvokeConfigChangedCallbacks();
+}
+
+}  // namespace Config
-- 
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