# VkPhysicalDeviceShaderAtomicInt64Features(3) Manual Page

## Name

VkPhysicalDeviceShaderAtomicInt64Features - Structure describing features supported by VK_KHR_shader_atomic_int64

## C Specification

To query 64-bit atomic support for signed and unsigned integers call vkGetPhysicalDeviceFeatures2 with a `VkPhysicalDeviceShaderAtomicInt64Features` structure included in the `pNext` chain of its `pFeatures` parameter.

The VkPhysicalDeviceShaderAtomicInt64Features structure is defined as:

    typedef struct VkPhysicalDeviceShaderAtomicInt64Features {
        VkStructureType    sType;
        void*              pNext;
        VkBool32           shaderBufferInt64Atomics;
        VkBool32           shaderSharedInt64Atomics;
    } VkPhysicalDeviceShaderAtomicInt64Features;

or the equivalent

    typedef VkPhysicalDeviceShaderAtomicInt64Features VkPhysicalDeviceShaderAtomicInt64FeaturesKHR;

## Members

- `sType` is the type of this structure.

- `pNext` is `NULL` or a pointer to an extension-specific structure.

## Description

- `shaderBufferInt64Atomics` indicates whether shaders can support 64-bit unsigned and signed integer atomic operations on buffers.

- `shaderSharedInt64Atomics` indicates whether shaders can support 64-bit unsigned and signed integer atomic operations on shared memory.

Valid Usage (Implicit)

- `sType` must be `VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_SHADER_ATOMIC_INT64_FEATURES`

## See Also

`VkBool32`, VkStructureType

## Document Notes

For more information, see the Vulkan Specification

This page is extracted from the Vulkan Specification. Fixes and changes should be made to the Specification, not directly.

## Copyright

Copyright (c) 2014-2020 Khronos Group. This work is licensed under a Creative Commons Attribution 4.0 International License.