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22a5a1459f
* Update release number to 124.
Github Issues:
* Fix Makefile SPECREMARK macro to work when not building in a git tree
(public issue 992).
* Ignore pname:aspectMask for unused attachments in
slink:VkSubpassDescription2KHR valid usage statements (public pull
request 1028).
* Minor markup / spelling fixes (public pull requests 1035, 1045).
Internal Issues:
* Fix markup in Valid Usage statement for slink:VkCreateFramebuffer
(internal issue 1823).
* Add a new <<synchronization-signal-operation-order, _signal operation
order_>> section to the synchronization chapter which describes in
detail the ordering guarantees provided by the API between fence and
semaphore signal operations (internal merge request 3368).
* Move generated `appendix/meta/` files into the Makefile GENERATED
directory (internal merge request 3381).
New Extensions
* `<<VK_KHR_shader_clock>>`
* `<<VK_KHR_timeline_semaphore>>`
62 lines
1.6 KiB
Plaintext
62 lines
1.6 KiB
Plaintext
// Copyright (c) 2016-2019 Khronos Group. This work is licensed under a
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// Creative Commons Attribution 4.0 International License; see
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// http://creativecommons.org/licenses/by/4.0/
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include::{generated}/meta/VK_KHR_external_semaphore_fd.txt[]
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*Last Modified Date*::
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2016-10-21
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*IP Status*::
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No known IP claims.
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*Contributors*::
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- Jesse Hall, Google
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- James Jones, NVIDIA
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- Jeff Juliano, NVIDIA
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- Carsten Rohde, NVIDIA
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An application using external memory may wish to synchronize access to that
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memory using semaphores.
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This extension enables an application to export semaphore payload to and
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import semaphore payload from POSIX file descriptors.
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=== New Object Types
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None.
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=== New Enum Constants
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* ename:VK_STRUCTURE_TYPE_IMPORT_SEMAPHORE_FD_INFO_KHR
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* ename:VK_STRUCTURE_TYPE_SEMAPHORE_GET_FD_INFO_KHR
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=== New Enums
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None.
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=== New Structs
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* slink:VkImportSemaphoreFdInfoKHR
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* slink:VkSemaphoreGetFdInfoKHR
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=== New Functions
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* flink:vkImportSemaphoreFdKHR
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* flink:vkGetSemaphoreFdKHR
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=== Issues
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1) Does the application need to close the file descriptor returned by
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flink:vkGetSemaphoreFdKHR?
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*RESOLVED*: Yes, unless it is passed back in to a driver instance to import
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the semaphore.
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A successful get call transfers ownership of the file descriptor to the
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application, and a successful import transfers it back to the driver.
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Destroying the original semaphore object will not close the file descriptor
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or remove its reference to the underlying semaphore resource associated with
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it.
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=== Version History
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* Revision 1, 2016-10-21 (Jesse Hall)
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- Initial revision
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