From 3030ab8664e643f9c4d97cfa96804798a6c95c8c Mon Sep 17 00:00:00 2001
From: David Anderson <dvander@alliedmods.net>
Date: Wed, 28 Oct 2009 00:50:48 -0700
Subject: [PATCH] Fixed crash when activating command listeners on EP1 while
 inside a command callback (bug 4072, r=pred).

---
 core/ConsoleDetours.cpp | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/core/ConsoleDetours.cpp b/core/ConsoleDetours.cpp
index b83d0a93..f7e8c383 100644
--- a/core/ConsoleDetours.cpp
+++ b/core/ConsoleDetours.cpp
@@ -284,6 +284,23 @@ class GenericCommandHooker
 	Patch cgc;
 
 public:
+ 	static void DelayedActivation(void *inparam)
+ 	{
+ 		GenericCommandHooker *cdtrs = reinterpret_cast<GenericCommandHooker*>(inparam);
+ 		/* Safe to re-enter because the frame queue is lock+swapped. */
+ 		if ((!cdtrs->ces.applied || !cdtrs->cgc.applied) &&
+ 		    g_HL2.PeekCommandStack() != NULL)
+ 		{
+ 			g_SourceMod.AddFrameAction(GenericCommandHooker::DelayedActivation, cdtrs);
+ 			return;
+ 		}
+ 
+ 		if (!cdtrs->ces.applied)
+ 			cdtrs->ApplyPatch(&cdtrs->ces);
+ 		if (!cdtrs->cgc.applied)
+ 			cdtrs->ApplyPatch(&cdtrs->cgc);
+ 	}
+
 	bool Enable()
 	{
 		const char *platform = NULL;
@@ -321,6 +338,12 @@ public:
 		if (!PrepPatch("CGameClient::ExecuteString", "CGC", platform, &cgc))
 			return false;
 
+ 		if (g_HL2.PeekCommandStack() != NULL)
+ 		{
+ 			g_SourceMod.AddFrameAction(GenericCommandHooker::DelayedActivation, this);
+ 			return true;
+ 		}
+
 		ApplyPatch(&ces);
 		ApplyPatch(&cgc);