C Specification

The VkMemoryGetFdInfoKHR structure is defined as:

typedef struct VkMemoryGetFdInfoKHR {
    VkStructureType                       sType;
    const void*                           pNext;
    VkDeviceMemory                        memory;
    VkExternalMemoryHandleTypeFlagBits    handleType;
} VkMemoryGetFdInfoKHR;

Members

  • sType is the type of this structure.

  • pNext is NULL or a pointer to an extension-specific structure.

  • memory is the memory object from which the handle will be exported.

  • handleType is the type of handle requested.

Description

The properties of the file descriptor exported depend on the value of handleType. See VkExternalMemoryHandleTypeFlagBits for a description of the properties of the defined external memory handle types.

Note

The size of the exported file may be larger than the size requested by VkMemoryAllocateInfo::allocationSize. If handleType is VK_EXTERNAL_MEMORY_HANDLE_TYPE_DMA_BUF_BIT_EXT, then the application can query the file’s actual size with lseek(2).

Valid Usage
  • handleType must have been included in VkExportMemoryAllocateInfo::handleTypes when memory was created.

  • handleType must be defined as a POSIX file descriptor handle.

Valid Usage (Implicit)
  • sType must be VK_STRUCTURE_TYPE_MEMORY_GET_FD_INFO_KHR

  • pNext must be NULL

  • memory must be a valid VkDeviceMemory handle

  • handleType must be a valid VkExternalMemoryHandleTypeFlagBits value

See Also

Document Notes

For more information, see the Vulkan Specification at URL

This page is extracted from the Vulkan Specification. Fixes and changes should be made to the Specification, not directly.

Copyright (c) 2014-2019 Khronos Group. This work is licensed under a Creative Commons Attribution 4.0 International License.