Contact
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John Rosasco rosasco
Other Extension Metadata
- Last Modified Date
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2021-03-08
- IP Status
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No known IP claims.
- Contributors
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Craig Stout, Google
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John Bauman, Google
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John Rosasco, Google
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Description
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 Zircon event handles.
New Enum Constants
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VK_FUCHSIA_EXTERNAL_SEMAPHORE_EXTENSION_NAME -
VK_FUCHSIA_EXTERNAL_SEMAPHORE_SPEC_VERSION -
Extending VkExternalSemaphoreHandleTypeFlagBits:
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VK_EXTERNAL_SEMAPHORE_HANDLE_TYPE_ZIRCON_EVENT_BIT_FUCHSIA
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Extending VkStructureType:
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VK_STRUCTURE_TYPE_IMPORT_SEMAPHORE_ZIRCON_HANDLE_INFO_FUCHSIA -
VK_STRUCTURE_TYPE_SEMAPHORE_GET_ZIRCON_HANDLE_INFO_FUCHSIA
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Issues
1) Does the application need to close the Zircon event handle returned by vkGetSemaphoreZirconHandleFUCHSIA?
RESOLVED: Yes, unless it is passed back in to a driver instance to import the semaphore. A successful get call transfers ownership of the Zircon event handle to the application, and a successful import transfers it back to the driver. Destroying the original semaphore object will not close the Zircon event handle nor remove its reference to the underlying semaphore resource associated with it.
Document Notes
For more information, see the Vulkan Specification
This page is a generated document. Fixes and changes should be made to the generator scripts, not directly.