# VkDeviceDeviceMemoryReportCreateInfoEXT(3) Manual Page

## Name

VkDeviceDeviceMemoryReportCreateInfoEXT - Register device memory report callbacks for a Vulkan device

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## C Specification

To register callbacks for underlying device memory events of type VkDeviceMemoryReportEventTypeEXT, add one or multiple VkDeviceDeviceMemoryReportCreateInfoEXT structures to the `pNext` chain of the VkDeviceCreateInfo structure.

    // Provided by VK_EXT_device_memory_report
    typedef struct VkDeviceDeviceMemoryReportCreateInfoEXT {
        VkStructureType                        sType;
        const void*                            pNext;
        VkDeviceMemoryReportFlagsEXT           flags;
        PFN_vkDeviceMemoryReportCallbackEXT    pfnUserCallback;
        void*                                  pUserData;
    } VkDeviceDeviceMemoryReportCreateInfoEXT;

## Members

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

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

- `flags` is 0 and reserved for future use.

- `pfnUserCallback` is the application callback function to call.

- `pUserData` is user data to be passed to the callback.

## Description

The callback may be called from multiple threads simultaneously.

The callback must be called only once by the implementation when a VkDeviceMemoryReportEventTypeEXT event occurs.

Note | The callback could be called from a background thread other than the thread calling the Vulkan commands.

Valid Usage (Implicit)

- VUID-VkDeviceDeviceMemoryReportCreateInfoEXT-sType-sType
  `sType` must be `VK_STRUCTURE_TYPE_DEVICE_DEVICE_MEMORY_REPORT_CREATE_INFO_EXT`

- VUID-VkDeviceDeviceMemoryReportCreateInfoEXT-flags-zerobitmask
  `flags` must be `0`

- VUID-VkDeviceDeviceMemoryReportCreateInfoEXT-pfnUserCallback-parameter
  `pfnUserCallback` must be a valid PFN_vkDeviceMemoryReportCallbackEXT value

- VUID-VkDeviceDeviceMemoryReportCreateInfoEXT-pUserData-parameter
  `pUserData` must be a pointer value

## See Also

PFN_vkDeviceMemoryReportCallbackEXT, VK_EXT_device_memory_report, VkDeviceMemoryReportFlagsEXT, 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