C Specification
To import a semaphore payload from a POSIX file descriptor, call:
// Provided by VK_KHR_external_semaphore_fd
VkResult vkImportSemaphoreFdKHR(
VkDevice device,
const VkImportSemaphoreFdInfoKHR* pImportSemaphoreFdInfo);
Parameters
-
device
is the logical device that created the semaphore. -
pImportSemaphoreFdInfo
is a pointer to a VkImportSemaphoreFdInfoKHR structure specifying the semaphore and import parameters.
Description
Importing a semaphore payload from a file descriptor transfers ownership of the file descriptor from the application to the Vulkan implementation. The application must not perform any operations on the file descriptor 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.
If
VkPhysicalDeviceVulkanSC10Properties::deviceNoDynamicHostAllocations
is VK_TRUE
, vkImportSemaphoreFdKHR
must not return
VK_ERROR_OUT_OF_HOST_MEMORY
.
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.