From e0ce62d2ec7bd7e106ca63179e603449acd325ae Mon Sep 17 00:00:00 2001
From: Nico de Poel <ndepoel@gmail.com>
Date: Fri, 23 Jul 2021 09:11:31 +0200
Subject: [PATCH] Prevent double allocations of memory block for quakeparms,
 and report if allocation of hunk memory fails.

---
 Assets/Scripts/QuakeParms.cs | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/Assets/Scripts/QuakeParms.cs b/Assets/Scripts/QuakeParms.cs
index f983db9..7d5c845 100644
--- a/Assets/Scripts/QuakeParms.cs
+++ b/Assets/Scripts/QuakeParms.cs
@@ -29,7 +29,9 @@ public class QuakeParms
 
     public IntPtr ToNativePtr()
     {
-        nativeBlock = Marshal.AllocHGlobal(Marshal.SizeOf<QuakeParms>());
+        if (nativeBlock == IntPtr.Zero)
+            nativeBlock = Marshal.AllocHGlobal(Marshal.SizeOf<QuakeParms>());
+        
         Marshal.StructureToPtr(this, nativeBlock, false);
         return nativeBlock;
     }
@@ -48,6 +50,10 @@ public class QuakeParms
     {
         memSize = memorySize;
         memBase = Marshal.AllocHGlobal(memorySize);
+        if (memBase == IntPtr.Zero)
+        {
+            throw new OutOfMemoryException($"Could not allocate {memorySize / 1024 / 1024} MB of heap memory!");
+        }
     }
         
     public void Destroy()