From 345b4280698fb3da4cc95bf05abee776624604a8 Mon Sep 17 00:00:00 2001
From: Danny Robson <danny@nerdcruft.net>
Date: Wed, 13 Mar 2019 14:50:23 +1100
Subject: [PATCH] tools/hello: cache the vkCreateDebugReportCallbackEXT lookup

---
 tools/hello.cpp | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/tools/hello.cpp b/tools/hello.cpp
index acba2aa..4ec9632 100644
--- a/tools/hello.cpp
+++ b/tools/hello.cpp
@@ -299,12 +299,16 @@ VkResult _vkCreateDebugReportCallbackEXT (
     const VkAllocationCallbacks* pAllocator,
     VkDebugReportCallbackEXT* pCallback
 ) noexcept {
-    return reinterpret_cast<decltype(_vkCreateDebugReportCallbackEXT)*> (
+    static auto fn = reinterpret_cast<
+        decltype(_vkCreateDebugReportCallbackEXT)*
+    > (
         vkGetInstanceProcAddr (
             instance,
             "vkCreateDebugReportCallbackEXT"
         )
-    ) (instance, pCreateInfo, pAllocator, pCallback);
+    );
+
+    return fn (instance, pCreateInfo, pAllocator, pCallback);
 }