# vkImportSemaphoreZirconHandleFUCHSIA(3) Manual Page

## Name

vkImportSemaphoreZirconHandleFUCHSIA - Import a semaphore from a Zircon event handle

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## C Specification

To import a semaphore payload from a Zircon event handle, call:

    // Provided by VK_FUCHSIA_external_semaphore
    VkResult vkImportSemaphoreZirconHandleFUCHSIA(
        VkDevice                                    device,
        const VkImportSemaphoreZirconHandleInfoFUCHSIA* pImportSemaphoreZirconHandleInfo);

## Parameters

- `device` is the logical device that created the semaphore.

- `pImportSemaphoreZirconHandleInfo` is a pointer to a VkImportSemaphoreZirconHandleInfoFUCHSIA structure specifying the semaphore and import parameters.

## Description

Importing a semaphore payload from a Zircon event handle transfers ownership of the handle from the application to the Vulkan implementation. The application must not perform any operations on the handle after a successful import.

Applications can import the same semaphore payload into multiple instances of Vulkan, into the same instance from which it was exported, and multiple times into a given Vulkan instance.

Valid Usage

- VUID-vkImportSemaphoreZirconHandleFUCHSIA-semaphore-04764
  `semaphore` must not be associated with any queue command that has not yet completed execution on that queue

Valid Usage (Implicit)

- VUID-vkImportSemaphoreZirconHandleFUCHSIA-device-parameter
  `device` must be a valid VkDevice handle

- VUID-vkImportSemaphoreZirconHandleFUCHSIA-pImportSemaphoreZirconHandleInfo-parameter
  `pImportSemaphoreZirconHandleInfo` must be a valid pointer to a valid VkImportSemaphoreZirconHandleInfoFUCHSIA structure

Return Codes

On success, this command returns

  - `VK_SUCCESS`

On failure, this command returns

  - `VK_ERROR_OUT_OF_HOST_MEMORY`

  - `VK_ERROR_INVALID_EXTERNAL_HANDLE`

## See Also

VK_FUCHSIA_external_semaphore, VkDevice, VkImportSemaphoreZirconHandleInfoFUCHSIA

## 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