VK_KHR_external_fence_fd(3)

# VK_KHR_external_fence_fd(3) Manual Page

## Name

VK_KHR_external_fence_fd - device extension

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## Registered Extension Number

116

## Revision

1

## Extension and Version Dependencies

- Requires support for Vulkan 1.0

- Requires `VK_KHR_external_fence` to be enabled for any device-level functionality

## Contact

- Jesse Hall critsec

## Other Extension Metadata

Last Modified Date

  2017-05-08

IP Status

  No known IP claims.

Contributors

  - Jesse Hall, Google

  - James Jones, NVIDIA

  - Jeff Juliano, NVIDIA

  - Cass Everitt, Oculus

  - Contributors to `VK_KHR_external_semaphore_fd`

## Description

An application using external memory may wish to synchronize access to that memory using fences. This extension enables an application to export fence payload to and import fence payload from POSIX file descriptors.

## New Commands

- vkGetFenceFdKHR

- vkImportFenceFdKHR

## New Structures

- VkFenceGetFdInfoKHR

- VkImportFenceFdInfoKHR

## New Enum Constants

- `VK_KHR_EXTERNAL_FENCE_FD_EXTENSION_NAME`

- `VK_KHR_EXTERNAL_FENCE_FD_SPEC_VERSION`

- Extending VkStructureType:

  - `VK_STRUCTURE_TYPE_FENCE_GET_FD_INFO_KHR`

  - `VK_STRUCTURE_TYPE_IMPORT_FENCE_FD_INFO_KHR`

## Issues

This extension borrows concepts, semantics, and language from `VK_KHR_external_semaphore_fd`. That extension’s issues apply equally to this extension.

## Version History

- Revision 1, 2017-05-08 (Jesse Hall)

  - Initial revision

## See Also

VkFenceGetFdInfoKHR, VkImportFenceFdInfoKHR, vkGetFenceFdKHR, vkImportFenceFdKHR

## Document Notes

For more information, see the Vulkan Specification

This page is a generated document. Fixes and changes should be made to the generator scripts, not directly.

## Copyright

Copyright 2014-2022 The Khronos Group Inc.

SPDX-License-Identifier: CC-BY-4.0