From b7ff4d316d646ffbcdfda3c8539d45433c55c5c9 Mon Sep 17 00:00:00 2001
From: Cosmic Linden <cosmic@lindenlab.com>
Date: Mon, 23 May 2022 16:29:39 -0700
Subject: SL-17329: Add advanced developer menu button to purge the disk cache

---
 indra/newview/llviewermenu.cpp                     | 30 ++++++++++++++++++++++
 indra/newview/skins/default/xui/en/menu_viewer.xml | 12 +++++++++
 2 files changed, 42 insertions(+)

diff --git a/indra/newview/llviewermenu.cpp b/indra/newview/llviewermenu.cpp
index 5b300e96c6..78783de6ac 100644
--- a/indra/newview/llviewermenu.cpp
+++ b/indra/newview/llviewermenu.cpp
@@ -53,6 +53,7 @@
 #include "llcompilequeue.h"
 #include "llconsole.h"
 #include "lldebugview.h"
+#include "lldiskcache.h"
 #include "llenvironment.h"
 #include "llfilepicker.h"
 #include "llfirstuse.h"
@@ -2088,6 +2089,32 @@ class LLAdvancedDropPacket : public view_listener_t
 	}
 };
 
+//////////////////////
+// PURGE DISK CACHE //
+//////////////////////
+
+
+class LLAdvancedPurgeDiskCache : public view_listener_t
+{
+	bool handleEvent(const LLSD& userdata)
+	{
+        LL::WorkQueue::ptr_t main_queue = LL::WorkQueue::getInstance("mainloop");
+        LL::WorkQueue::ptr_t general_queue = LL::WorkQueue::getInstance("General");
+        llassert_always(main_queue);
+        llassert_always(general_queue);
+        main_queue->postTo(
+            general_queue,
+            []() // Work done on general queue
+            {
+                LLDiskCache::getInstance()->purge();
+                // Nothing needed to return
+            },
+            [](){}); // Callback to main thread is empty as there is nothing left to do
+
+		return true;
+	}
+};
+
 
 ////////////////////
 // EVENT Recorder //
@@ -9350,6 +9377,9 @@ void initialize_menus()
 	view_listener_t::addMenu(new LLAdvancedDisableMessageLog(), "Advanced.DisableMessageLog");
 	view_listener_t::addMenu(new LLAdvancedDropPacket(), "Advanced.DropPacket");
 
+    // Advanced > Cache
+    view_listener_t::addMenu(new LLAdvancedPurgeDiskCache(), "Advanced.PurgeDiskCache");
+
 	// Advanced > Recorder
 	view_listener_t::addMenu(new LLAdvancedAgentPilot(), "Advanced.AgentPilot");
 	view_listener_t::addMenu(new LLAdvancedToggleAgentPilotLoop(), "Advanced.ToggleAgentPilotLoop");
diff --git a/indra/newview/skins/default/xui/en/menu_viewer.xml b/indra/newview/skins/default/xui/en/menu_viewer.xml
index 8d7cfe1116..cb3bbcfba0 100644
--- a/indra/newview/skins/default/xui/en/menu_viewer.xml
+++ b/indra/newview/skins/default/xui/en/menu_viewer.xml
@@ -3326,6 +3326,18 @@ function="World.EnvPreset"
                  function="Advanced.DropPacket" />
             </menu_item_call>
         </menu>
+        <menu
+         create_jump_keys="true"
+         label="Cache"
+         name="Cache"
+         tear_off="true">
+            <menu_item_call
+             label="Purge Disk Cache"
+             name="Purge Disk Cache">
+                <menu_item_call.on_click
+                 function="Advanced.PurgeDiskCache" />
+            </menu_item_call>
+        </menu>
         <menu_item_call
          label="Dump Scripted Camera"
          name="Dump Scripted Camera">
-- 
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