Added VK_EXT_memory_priority extension

Author: robertosfield

include/vsg/vk/vulkan.h

@@ -133,6 +133,22 @@ typedef struct VkPhysicalDeviceMemoryBudgetPropertiesEXT {
     VkDeviceSize       heapUsage[VK_MAX_MEMORY_HEAPS];
 } VkPhysicalDeviceMemoryBudgetPropertiesEXT;
 
+#define VK_EXT_memory_priority 1
+#define VK_EXT_MEMORY_PRIORITY_SPEC_VERSION 1
+#define VK_EXT_MEMORY_PRIORITY_EXTENSION_NAME "VK_EXT_memory_priority"
+
+typedef struct VkPhysicalDeviceMemoryPriorityFeaturesEXT {
+    VkStructureType    sType;
+    void*              pNext;
+    VkBool32           memoryPriority;
+} VkPhysicalDeviceMemoryPriorityFeaturesEXT;
+
+typedef struct VkMemoryPriorityAllocateInfoEXT {
+    VkStructureType    sType;
+    const void*        pNext;
+    float              priority;
+} VkMemoryPriorityAllocateInfoEXT;
+
 #endif
 
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