C Specification
To import memory from a POSIX file descriptor handle, add a
VkImportMemoryFdInfoKHR structure to the pNext
chain of the
VkMemoryAllocateInfo structure.
The VkImportMemoryFdInfoKHR
structure is defined as:
typedef struct VkImportMemoryFdInfoKHR {
VkStructureType sType;
const void* pNext;
VkExternalMemoryHandleTypeFlagBits handleType;
int fd;
} VkImportMemoryFdInfoKHR;
Members
-
sType
is the type of this structure. -
pNext
isNULL
or a pointer to an extension-specific structure. -
handleType
specifies the handle type offd
. -
fd
is the external handle to import.
Description
Importing memory 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 underlying memory into multiple instances
of Vulkan, into the same instance from which it was exported, and multiple
times into a given Vulkan instance.
In all cases, each import operation must create a distinct
VkDeviceMemory
object.
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 (c) 2014-2019 Khronos Group. This work is licensed under a Creative Commons Attribution 4.0 International License.