# VkFenceGetFdInfoKHR(3) Manual Page

## Name

VkFenceGetFdInfoKHR - Structure describing a POSIX FD fence export operation

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## C Specification

The `VkFenceGetFdInfoKHR` structure is defined as:

    // Provided by VK_KHR_external_fence_fd
    typedef struct VkFenceGetFdInfoKHR {
        VkStructureType                      sType;
        const void*                          pNext;
        VkFence                              fence;
        VkExternalFenceHandleTypeFlagBits    handleType;
    } VkFenceGetFdInfoKHR;

## Members

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

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

- `fence` is the fence from which state will be exported.

- `handleType` is a VkExternalFenceHandleTypeFlagBits value specifying the type of handle requested.

## Description

The properties of the file descriptor returned depend on the value of `handleType`. See VkExternalFenceHandleTypeFlagBits for a description of the properties of the defined external fence handle types.

Valid Usage

- VUID-VkFenceGetFdInfoKHR-handleType-01453
  `handleType` must have been included in VkExportFenceCreateInfo::`handleTypes` when `fence`’s current payload was created

- VUID-VkFenceGetFdInfoKHR-handleType-01454
  If `handleType` refers to a handle type with copy payload transference semantics, `fence` must be signaled, or have an associated fence signal operation pending execution

- VUID-VkFenceGetFdInfoKHR-fence-01455
  `fence` must not currently have its payload replaced by an imported payload as described below in Importing Fence Payloads unless that imported payload’s handle type was included in VkExternalFenceProperties::`exportFromImportedHandleTypes` for `handleType`

- VUID-VkFenceGetFdInfoKHR-handleType-01456
  `handleType` must be defined as a POSIX file descriptor handle

Valid Usage (Implicit)

- VUID-VkFenceGetFdInfoKHR-sType-sType
  `sType` must be `VK_STRUCTURE_TYPE_FENCE_GET_FD_INFO_KHR`

- VUID-VkFenceGetFdInfoKHR-pNext-pNext
  `pNext` must be `NULL`

- VUID-VkFenceGetFdInfoKHR-fence-parameter
  `fence` must be a valid VkFence handle

- VUID-VkFenceGetFdInfoKHR-handleType-parameter
  `handleType` must be a valid VkExternalFenceHandleTypeFlagBits value

## See Also

VK_KHR_external_fence_fd, VkExternalFenceHandleTypeFlagBits, VkFence, VkStructureType, vkGetFenceFdKHR

## 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 2014-2024 The Khronos Group Inc.

SPDX-License-Identifier: CC-BY-4.0