From f5bacf193a77a10b9d69c9e2e8842d0dac34ee56 Mon Sep 17 00:00:00 2001
From: Edward O'Callaghan <funfunctor@folklore1984.net>
Date: Tue, 7 Feb 2017 22:03:40 +1100
Subject: src/res_mgmr.hcpp: Add RAII helper class

Signed-off-by: Edward O'Callaghan <funfunctor@folklore1984.net>
---
 src/res_mgmr.hcpp | 57 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 57 insertions(+)
 create mode 100644 src/res_mgmr.hcpp

diff --git a/src/res_mgmr.hcpp b/src/res_mgmr.hcpp
new file mode 100644
index 0000000..3827302
--- /dev/null
+++ b/src/res_mgmr.hcpp
@@ -0,0 +1,57 @@
+template <typename T>
+class VDeleter {
+public:
+    VDeleter() : VDeleter([](T, VkAllocationCallbacks*) {}) {}
+
+    VDeleter(std::function<void(T, VkAllocationCallbacks*)> deletef) {
+        this->deleter = [=](T obj) { deletef(obj, nullptr); };
+    }
+
+    VDeleter(const VDeleter<VkInstance>& instance, std::function<void(VkInstance, T, VkAllocationCallbacks*)> deletef) {
+        this->deleter = [&instance, deletef](T obj) { deletef(instance, obj, nullptr); };
+    }
+
+    VDeleter(const VDeleter<VkDevice>& device, std::function<void(VkDevice, T, VkAllocationCallbacks*)> deletef) {
+        this->deleter = [&device, deletef](T obj) { deletef(device, obj, nullptr); };
+    }
+
+    ~VDeleter() {
+        cleanup();
+    }
+
+    const T* operator &() const {
+        return &object;
+    }
+
+    T* replace() {
+        cleanup();
+        return &object;
+    }
+
+    operator T() const {
+        return object;
+    }
+
+    void operator=(T rhs) {
+        if (rhs != object) {
+            cleanup();
+            object = rhs;
+        }
+    }
+
+    template<typename V>
+    bool operator==(V rhs) {
+        return object == T(rhs);
+    }
+
+private:
+    T object{VK_NULL_HANDLE};
+    std::function<void(T)> deleter;
+
+    void cleanup() {
+        if (object != VK_NULL_HANDLE) {
+            deleter(object);
+        }
+        object = VK_NULL_HANDLE;
+    }
+};
-- 
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