57 lines
1.5 KiB
Plaintext
57 lines
1.5 KiB
Plaintext
// Copyright (c) 2016-2018 Khronos Group. This work is licensed under a
|
|
// Creative Commons Attribution 4.0 International License; see
|
|
// http://creativecommons.org/licenses/by/4.0/
|
|
|
|
include::meta/VK_KHR_external_semaphore_fd.txt[]
|
|
|
|
*Last Modified Date*::
|
|
2016-10-21
|
|
*IP Status*::
|
|
No known IP claims.
|
|
*Contributors*::
|
|
- Jesse Hall, Google
|
|
- James Jones, NVIDIA
|
|
- Jeff Juliano, NVIDIA
|
|
- Carsten Rohde, NVIDIA
|
|
|
|
An application using external memory may wish to synchronize access to that
|
|
memory using semaphores.
|
|
This extension enables an application to export semaphore payload to and
|
|
import semaphore payload from POSIX file descriptors.
|
|
|
|
=== New Object Types
|
|
|
|
None.
|
|
|
|
=== New Enum Constants
|
|
|
|
* ename:VK_STRUCTURE_TYPE_IMPORT_SEMAPHORE_FD_INFO_KHR
|
|
* ename:VK_STRUCTURE_TYPE_SEMAPHORE_GET_FD_INFO_KHR
|
|
|
|
=== New Enums
|
|
|
|
None.
|
|
|
|
=== New Structs
|
|
|
|
* slink:VkImportSemaphoreFdInfoKHR
|
|
* slink:VkSemaphoreGetFdInfoKHR
|
|
|
|
=== New Functions
|
|
|
|
* flink:vkImportSemaphoreFdKHR
|
|
* flink:vkGetSemaphoreFdKHR
|
|
|
|
=== Issues
|
|
|
|
1) Does the application need to close the file descriptor returned by
|
|
flink:vkGetSemaphoreFdKHR?
|
|
|
|
*RESOLVED*: Yes, unless it is passed back in to a driver instance to import
|
|
the semaphore.
|
|
A successful get call transfers ownership of the file descriptor to the
|
|
application, and a successful import transfers it back to the driver.
|
|
Destroying the original semaphore object will not close the file descriptor
|
|
or remove its reference to the underlying semaphore resource associated with
|
|
it.
|