# VkPhysicalDeviceExternalMemoryHostPropertiesEXT(3) Manual Page

## Name

VkPhysicalDeviceExternalMemoryHostPropertiesEXT - Structure describing external memory host pointer limits that can be supported by an implementation

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## C Specification

The `VkPhysicalDeviceExternalMemoryHostPropertiesEXT` structure is defined as:

    // Provided by VK_EXT_external_memory_host
    typedef struct VkPhysicalDeviceExternalMemoryHostPropertiesEXT {
        VkStructureType    sType;
        void*              pNext;
        VkDeviceSize       minImportedHostPointerAlignment;
    } VkPhysicalDeviceExternalMemoryHostPropertiesEXT;

## Members

- `sType` is a VkStructureType value identifying this structure.

- `pNext` is `NULL` or a pointer to a structure extending this structure.

- `minImportedHostPointerAlignment` is the minimum required alignment, in bytes, for the base address and size of host pointers that can be imported to a Vulkan memory object. The value must be a power of two.

## Description

If the `VkPhysicalDeviceExternalMemoryHostPropertiesEXT` structure is included in the `pNext` chain of the VkPhysicalDeviceProperties2 structure passed to vkGetPhysicalDeviceProperties2, it is filled in with each corresponding implementation-dependent property.

Valid Usage (Implicit)

- VUID-VkPhysicalDeviceExternalMemoryHostPropertiesEXT-sType-sType
  `sType` must be `VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_EXTERNAL_MEMORY_HOST_PROPERTIES_EXT`

## See Also

VK_EXT_external_memory_host, VkDeviceSize, 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 2014-2025 The Khronos Group Inc.

SPDX-License-Identifier: CC-BY-4.0