{-# language CPP #-} -- | = Name -- -- VK_KHR_timeline_semaphore - device extension -- -- == VK_KHR_timeline_semaphore -- -- [__Name String__] -- @VK_KHR_timeline_semaphore@ -- -- [__Extension Type__] -- Device extension -- -- [__Registered Extension Number__] -- 208 -- -- [__Revision__] -- 2 -- -- [__Ratification Status__] -- Ratified -- -- [__Extension and Version Dependencies__] -- <https://www.khronos.org/registry/vulkan/specs/1.2-extensions/html/vkspec.html#VK_KHR_get_physical_device_properties2 VK_KHR_get_physical_device_properties2> -- -- [__Deprecation State__] -- -- - /Promoted/ to -- <https://www.khronos.org/registry/vulkan/specs/1.2-extensions/html/vkspec.html#versions-1.2-promotions Vulkan 1.2> -- -- [__Contact__] -- -- - Faith Ekstrand -- <https://github.com/KhronosGroup/Vulkan-Docs/issues/new?body=[VK_KHR_timeline_semaphore] @gfxstrand%0A*Here describe the issue or question you have about the VK_KHR_timeline_semaphore extension* > -- -- == Other Extension Metadata -- -- [__Last Modified Date__] -- 2019-06-12 -- -- [__IP Status__] -- No known IP claims. -- -- [__Interactions and External Dependencies__] -- -- - This extension interacts with -- @VK_KHR_external_semaphore_capabilities@ -- -- - This extension interacts with @VK_KHR_external_semaphore@ -- -- - This extension interacts with @VK_KHR_external_semaphore_win32@ -- -- - Promoted to Vulkan 1.2 Core -- -- [__Contributors__] -- -- - Jeff Bolz, NVIDIA -- -- - Yuriy O’Donnell, Epic Games -- -- - Faith Ekstrand, Intel -- -- - Jesse Hall, Google -- -- - James Jones, NVIDIA -- -- - Jeff Juliano, NVIDIA -- -- - Daniel Rakos, AMD -- -- - Ray Smith, Arm -- -- == Description -- -- This extension introduces a new type of semaphore that has an integer -- payload identifying a point in a timeline. Such timeline semaphores -- support the following operations: -- -- - Host query - A host operation that allows querying the payload of -- the timeline semaphore. -- -- - Host wait - A host operation that allows a blocking wait for a -- timeline semaphore to reach a specified value. -- -- - Host signal - A host operation that allows advancing the timeline -- semaphore to a specified value. -- -- - Device wait - A device operation that allows waiting for a timeline -- semaphore to reach a specified value. -- -- - Device signal - A device operation that allows advancing the -- timeline semaphore to a specified value. -- -- == Promotion to Vulkan 1.2 -- -- All functionality in this extension is included in core Vulkan 1.2, with -- the KHR suffix omitted. The original type, enum and command names are -- still available as aliases of the core functionality. -- -- == New Commands -- -- - 'getSemaphoreCounterValueKHR' -- -- - 'signalSemaphoreKHR' -- -- - 'waitSemaphoresKHR' -- -- == New Structures -- -- - 'SemaphoreSignalInfoKHR' -- -- - 'SemaphoreWaitInfoKHR' -- -- - Extending -- 'Vulkan.Core11.Promoted_From_VK_KHR_get_physical_device_properties2.PhysicalDeviceFeatures2', -- 'Vulkan.Core10.Device.DeviceCreateInfo': -- -- - 'PhysicalDeviceTimelineSemaphoreFeaturesKHR' -- -- - Extending -- 'Vulkan.Core11.Promoted_From_VK_KHR_get_physical_device_properties2.PhysicalDeviceProperties2': -- -- - 'PhysicalDeviceTimelineSemaphorePropertiesKHR' -- -- - Extending 'Vulkan.Core10.QueueSemaphore.SemaphoreCreateInfo', -- 'Vulkan.Core11.Promoted_From_VK_KHR_external_semaphore_capabilities.PhysicalDeviceExternalSemaphoreInfo': -- -- - 'SemaphoreTypeCreateInfoKHR' -- -- - Extending 'Vulkan.Core10.Queue.SubmitInfo', -- 'Vulkan.Core10.SparseResourceMemoryManagement.BindSparseInfo': -- -- - 'TimelineSemaphoreSubmitInfoKHR' -- -- == New Enums -- -- - 'SemaphoreTypeKHR' -- -- - 'SemaphoreWaitFlagBitsKHR' -- -- == New Bitmasks -- -- - 'SemaphoreWaitFlagsKHR' -- -- == New Enum Constants -- -- - 'KHR_TIMELINE_SEMAPHORE_EXTENSION_NAME' -- -- - 'KHR_TIMELINE_SEMAPHORE_SPEC_VERSION' -- -- - Extending 'Vulkan.Core12.Enums.SemaphoreType.SemaphoreType': -- -- - 'SEMAPHORE_TYPE_BINARY_KHR' -- -- - 'SEMAPHORE_TYPE_TIMELINE_KHR' -- -- - Extending -- 'Vulkan.Core12.Enums.SemaphoreWaitFlagBits.SemaphoreWaitFlagBits': -- -- - 'SEMAPHORE_WAIT_ANY_BIT_KHR' -- -- - Extending 'Vulkan.Core10.Enums.StructureType.StructureType': -- -- - 'STRUCTURE_TYPE_PHYSICAL_DEVICE_TIMELINE_SEMAPHORE_FEATURES_KHR' -- -- - 'STRUCTURE_TYPE_PHYSICAL_DEVICE_TIMELINE_SEMAPHORE_PROPERTIES_KHR' -- -- - 'STRUCTURE_TYPE_SEMAPHORE_SIGNAL_INFO_KHR' -- -- - 'STRUCTURE_TYPE_SEMAPHORE_TYPE_CREATE_INFO_KHR' -- -- - 'STRUCTURE_TYPE_SEMAPHORE_WAIT_INFO_KHR' -- -- - 'STRUCTURE_TYPE_TIMELINE_SEMAPHORE_SUBMIT_INFO_KHR' -- -- == Issues -- -- 1) Do we need a new object type for this? -- -- __RESOLVED__: No, we just introduce a new type of semaphore object, as -- @VK_KHR_external_semaphore_win32@ already uses semaphores as the -- destination for importing D3D12 fence objects, which are semantically -- close\/identical to the proposed synchronization primitive. -- -- 2) What type of payload the new synchronization primitive has? -- -- __RESOLVED__: A 64-bit unsigned integer that can only be set to strictly -- increasing values by signal operations and is not changed by wait -- operations. -- -- 3) Does the new synchronization primitive have the same -- signal-before-wait requirement as the existing semaphores do? -- -- __RESOLVED__: No. Timeline semaphores support signaling and waiting -- entirely asynchronously. It is the responsibility of the client to avoid -- deadlock. -- -- 4) Does the new synchronization primitive allow resetting its payload? -- -- __RESOLVED__: No, allowing the payload value to “go backwards” is -- problematic. Applications looking for reset behavior should create a new -- instance of the synchronization primitive instead. -- -- 5) How do we enable host waits on the synchronization primitive? -- -- __RESOLVED__: Both a non-blocking query of the current payload value of -- the synchronization primitive, and a blocking wait operation are -- provided. -- -- 6) How do we enable device waits and signals on the synchronization -- primitive? -- -- __RESOLVED__: Similar to @VK_KHR_external_semaphore_win32@, this -- extension introduces a new structure that can be chained to -- 'Vulkan.Core10.Queue.SubmitInfo' to specify the values signaled -- semaphores should be set to, and the values waited semaphores need to -- reach. -- -- 7) Can the new synchronization primitive be used to synchronize -- presentation and swapchain image acquisition operations? -- -- __RESOLVED__: Some implementations may have problems with supporting -- that directly, thus it is not allowed in this extension. -- -- 8) Do we want to support external sharing of the new synchronization -- primitive type? -- -- __RESOLVED__: Yes. Timeline semaphore specific external sharing -- capabilities can be queried using -- 'Vulkan.Core11.Promoted_From_VK_KHR_external_semaphore_capabilities.getPhysicalDeviceExternalSemaphoreProperties' -- by chaining the new 'SemaphoreTypeCreateInfoKHR' structure to its -- @pExternalSemaphoreInfo@ structure. This allows having a different set -- of external semaphore handle types supported for timeline semaphores vs. -- binary semaphores. -- -- 9) Do we need to add a host signal operation for the new synchronization -- primitive type? -- -- __RESOLVED__: Yes. This helps in situations where one host thread -- submits a workload but another host thread has the information on when -- the workload is ready to be executed. -- -- 10) How should the new synchronization primitive interact with the -- ordering requirements of the original 'Vulkan.Core10.Handles.Semaphore'? -- -- __RESOLVED__: Prior to calling any command which /may/ cause a wait -- operation on a binary semaphore, the client /must/ ensure that the -- semaphore signal operation that has been submitted for execution and any -- semaphore signal operations on which it depends (if any) /must/ have -- also been submitted for execution. -- -- 11) Should we have separate feature bits for different sub-features of -- timeline semaphores? -- -- __RESOLVED__: No. The only feature which cannot be supported universally -- is timeline semaphore import\/export. For import\/export, the client is -- already required to query available external handle types via -- 'Vulkan.Core11.Promoted_From_VK_KHR_external_semaphore_capabilities.getPhysicalDeviceExternalSemaphoreProperties' -- and provide the semaphore type by adding a 'SemaphoreTypeCreateInfoKHR' -- structure to the @pNext@ chain of -- 'Vulkan.Core11.Promoted_From_VK_KHR_external_semaphore_capabilities.PhysicalDeviceExternalSemaphoreInfo' -- so no new feature bit is required. -- -- == Version History -- -- - Revision 1, 2018-05-10 (Faith Ekstrand) -- -- - Initial version -- -- - Revision 2, 2019-06-12 (Faith Ekstrand) -- -- - Added an initialValue parameter to timeline semaphore creation -- -- == See Also -- -- 'PhysicalDeviceTimelineSemaphoreFeaturesKHR', -- 'PhysicalDeviceTimelineSemaphorePropertiesKHR', -- 'SemaphoreSignalInfoKHR', 'SemaphoreTypeCreateInfoKHR', -- 'SemaphoreTypeKHR', 'SemaphoreWaitFlagBitsKHR', 'SemaphoreWaitFlagsKHR', -- 'SemaphoreWaitInfoKHR', 'TimelineSemaphoreSubmitInfoKHR', -- 'getSemaphoreCounterValueKHR', 'signalSemaphoreKHR', 'waitSemaphoresKHR' -- -- == Document Notes -- -- For more information, see the -- <https://registry.khronos.org/vulkan/specs/1.3-extensions/html/vkspec.html#VK_KHR_timeline_semaphore Vulkan Specification> -- -- This page is a generated document. Fixes and changes should be made to -- the generator scripts, not directly. module Vulkan.Extensions.VK_KHR_timeline_semaphore ( pattern STRUCTURE_TYPE_PHYSICAL_DEVICE_TIMELINE_SEMAPHORE_FEATURES_KHR , pattern STRUCTURE_TYPE_PHYSICAL_DEVICE_TIMELINE_SEMAPHORE_PROPERTIES_KHR , pattern STRUCTURE_TYPE_SEMAPHORE_TYPE_CREATE_INFO_KHR , pattern STRUCTURE_TYPE_TIMELINE_SEMAPHORE_SUBMIT_INFO_KHR , pattern STRUCTURE_TYPE_SEMAPHORE_WAIT_INFO_KHR , pattern STRUCTURE_TYPE_SEMAPHORE_SIGNAL_INFO_KHR , pattern SEMAPHORE_TYPE_BINARY_KHR , pattern SEMAPHORE_TYPE_TIMELINE_KHR , pattern SEMAPHORE_WAIT_ANY_BIT_KHR , getSemaphoreCounterValueKHR , waitSemaphoresKHR , signalSemaphoreKHR , SemaphoreWaitFlagsKHR , SemaphoreTypeKHR , SemaphoreWaitFlagBitsKHR , PhysicalDeviceTimelineSemaphoreFeaturesKHR , PhysicalDeviceTimelineSemaphorePropertiesKHR , SemaphoreTypeCreateInfoKHR , TimelineSemaphoreSubmitInfoKHR , SemaphoreWaitInfoKHR , SemaphoreSignalInfoKHR , KHR_TIMELINE_SEMAPHORE_SPEC_VERSION , pattern KHR_TIMELINE_SEMAPHORE_SPEC_VERSION , KHR_TIMELINE_SEMAPHORE_EXTENSION_NAME , pattern KHR_TIMELINE_SEMAPHORE_EXTENSION_NAME ) where import Data.String (IsString) import Vulkan.Core12.Promoted_From_VK_KHR_timeline_semaphore (getSemaphoreCounterValue) import Vulkan.Core12.Promoted_From_VK_KHR_timeline_semaphore (signalSemaphore) import Vulkan.Core12.Promoted_From_VK_KHR_timeline_semaphore (waitSemaphores) import Vulkan.Core12.Promoted_From_VK_KHR_timeline_semaphore (PhysicalDeviceTimelineSemaphoreFeatures) import Vulkan.Core12.Promoted_From_VK_KHR_timeline_semaphore (PhysicalDeviceTimelineSemaphoreProperties) import Vulkan.Core12.Promoted_From_VK_KHR_timeline_semaphore (SemaphoreSignalInfo) import Vulkan.Core12.Enums.SemaphoreType (SemaphoreType) import Vulkan.Core12.Promoted_From_VK_KHR_timeline_semaphore (SemaphoreTypeCreateInfo) import Vulkan.Core12.Enums.SemaphoreWaitFlagBits (SemaphoreWaitFlagBits) import Vulkan.Core12.Enums.SemaphoreWaitFlagBits (SemaphoreWaitFlags) import Vulkan.Core12.Promoted_From_VK_KHR_timeline_semaphore (SemaphoreWaitInfo) import Vulkan.Core12.Promoted_From_VK_KHR_timeline_semaphore (TimelineSemaphoreSubmitInfo) import Vulkan.Core12.Enums.SemaphoreType (SemaphoreType(SEMAPHORE_TYPE_BINARY)) import Vulkan.Core12.Enums.SemaphoreType (SemaphoreType(SEMAPHORE_TYPE_TIMELINE)) import Vulkan.Core12.Enums.SemaphoreWaitFlagBits (SemaphoreWaitFlags) import Vulkan.Core12.Enums.SemaphoreWaitFlagBits (SemaphoreWaitFlagBits(SEMAPHORE_WAIT_ANY_BIT)) import Vulkan.Core10.Enums.StructureType (StructureType(STRUCTURE_TYPE_PHYSICAL_DEVICE_TIMELINE_SEMAPHORE_FEATURES)) import Vulkan.Core10.Enums.StructureType (StructureType(STRUCTURE_TYPE_PHYSICAL_DEVICE_TIMELINE_SEMAPHORE_PROPERTIES)) import Vulkan.Core10.Enums.StructureType (StructureType(STRUCTURE_TYPE_SEMAPHORE_SIGNAL_INFO)) import Vulkan.Core10.Enums.StructureType (StructureType(STRUCTURE_TYPE_SEMAPHORE_TYPE_CREATE_INFO)) import Vulkan.Core10.Enums.StructureType (StructureType(STRUCTURE_TYPE_SEMAPHORE_WAIT_INFO)) import Vulkan.Core10.Enums.StructureType (StructureType(STRUCTURE_TYPE_TIMELINE_SEMAPHORE_SUBMIT_INFO)) -- No documentation found for TopLevel "VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_TIMELINE_SEMAPHORE_FEATURES_KHR" pattern $bSTRUCTURE_TYPE_PHYSICAL_DEVICE_TIMELINE_SEMAPHORE_FEATURES_KHR :: StructureType $mSTRUCTURE_TYPE_PHYSICAL_DEVICE_TIMELINE_SEMAPHORE_FEATURES_KHR :: forall {r}. StructureType -> ((# #) -> r) -> ((# #) -> r) -> r STRUCTURE_TYPE_PHYSICAL_DEVICE_TIMELINE_SEMAPHORE_FEATURES_KHR = STRUCTURE_TYPE_PHYSICAL_DEVICE_TIMELINE_SEMAPHORE_FEATURES -- No documentation found for TopLevel "VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_TIMELINE_SEMAPHORE_PROPERTIES_KHR" pattern $bSTRUCTURE_TYPE_PHYSICAL_DEVICE_TIMELINE_SEMAPHORE_PROPERTIES_KHR :: StructureType $mSTRUCTURE_TYPE_PHYSICAL_DEVICE_TIMELINE_SEMAPHORE_PROPERTIES_KHR :: forall {r}. StructureType -> ((# #) -> r) -> ((# #) -> r) -> r STRUCTURE_TYPE_PHYSICAL_DEVICE_TIMELINE_SEMAPHORE_PROPERTIES_KHR = STRUCTURE_TYPE_PHYSICAL_DEVICE_TIMELINE_SEMAPHORE_PROPERTIES -- No documentation found for TopLevel "VK_STRUCTURE_TYPE_SEMAPHORE_TYPE_CREATE_INFO_KHR" pattern $bSTRUCTURE_TYPE_SEMAPHORE_TYPE_CREATE_INFO_KHR :: StructureType $mSTRUCTURE_TYPE_SEMAPHORE_TYPE_CREATE_INFO_KHR :: forall {r}. StructureType -> ((# #) -> r) -> ((# #) -> r) -> r STRUCTURE_TYPE_SEMAPHORE_TYPE_CREATE_INFO_KHR = STRUCTURE_TYPE_SEMAPHORE_TYPE_CREATE_INFO -- No documentation found for TopLevel "VK_STRUCTURE_TYPE_TIMELINE_SEMAPHORE_SUBMIT_INFO_KHR" pattern $bSTRUCTURE_TYPE_TIMELINE_SEMAPHORE_SUBMIT_INFO_KHR :: StructureType $mSTRUCTURE_TYPE_TIMELINE_SEMAPHORE_SUBMIT_INFO_KHR :: forall {r}. StructureType -> ((# #) -> r) -> ((# #) -> r) -> r STRUCTURE_TYPE_TIMELINE_SEMAPHORE_SUBMIT_INFO_KHR = STRUCTURE_TYPE_TIMELINE_SEMAPHORE_SUBMIT_INFO -- No documentation found for TopLevel "VK_STRUCTURE_TYPE_SEMAPHORE_WAIT_INFO_KHR" pattern $bSTRUCTURE_TYPE_SEMAPHORE_WAIT_INFO_KHR :: StructureType $mSTRUCTURE_TYPE_SEMAPHORE_WAIT_INFO_KHR :: forall {r}. StructureType -> ((# #) -> r) -> ((# #) -> r) -> r STRUCTURE_TYPE_SEMAPHORE_WAIT_INFO_KHR = STRUCTURE_TYPE_SEMAPHORE_WAIT_INFO -- No documentation found for TopLevel "VK_STRUCTURE_TYPE_SEMAPHORE_SIGNAL_INFO_KHR" pattern $bSTRUCTURE_TYPE_SEMAPHORE_SIGNAL_INFO_KHR :: StructureType $mSTRUCTURE_TYPE_SEMAPHORE_SIGNAL_INFO_KHR :: forall {r}. StructureType -> ((# #) -> r) -> ((# #) -> r) -> r STRUCTURE_TYPE_SEMAPHORE_SIGNAL_INFO_KHR = STRUCTURE_TYPE_SEMAPHORE_SIGNAL_INFO -- No documentation found for TopLevel "VK_SEMAPHORE_TYPE_BINARY_KHR" pattern $bSEMAPHORE_TYPE_BINARY_KHR :: SemaphoreType $mSEMAPHORE_TYPE_BINARY_KHR :: forall {r}. SemaphoreType -> ((# #) -> r) -> ((# #) -> r) -> r SEMAPHORE_TYPE_BINARY_KHR = SEMAPHORE_TYPE_BINARY -- No documentation found for TopLevel "VK_SEMAPHORE_TYPE_TIMELINE_KHR" pattern $bSEMAPHORE_TYPE_TIMELINE_KHR :: SemaphoreType $mSEMAPHORE_TYPE_TIMELINE_KHR :: forall {r}. SemaphoreType -> ((# #) -> r) -> ((# #) -> r) -> r SEMAPHORE_TYPE_TIMELINE_KHR = SEMAPHORE_TYPE_TIMELINE -- No documentation found for TopLevel "VK_SEMAPHORE_WAIT_ANY_BIT_KHR" pattern $bSEMAPHORE_WAIT_ANY_BIT_KHR :: SemaphoreWaitFlagBits $mSEMAPHORE_WAIT_ANY_BIT_KHR :: forall {r}. SemaphoreWaitFlagBits -> ((# #) -> r) -> ((# #) -> r) -> r SEMAPHORE_WAIT_ANY_BIT_KHR = SEMAPHORE_WAIT_ANY_BIT -- No documentation found for TopLevel "vkGetSemaphoreCounterValueKHR" getSemaphoreCounterValueKHR :: Device -> Semaphore -> io ("value" ::: Word64) getSemaphoreCounterValueKHR = forall (io :: * -> *). MonadIO io => Device -> Semaphore -> io ("value" ::: Word64) getSemaphoreCounterValue -- No documentation found for TopLevel "vkWaitSemaphoresKHR" waitSemaphoresKHR :: Device -> SemaphoreWaitInfo -> ("value" ::: Word64) -> io Result waitSemaphoresKHR = forall (io :: * -> *). MonadIO io => Device -> SemaphoreWaitInfo -> ("value" ::: Word64) -> io Result waitSemaphores -- No documentation found for TopLevel "vkSignalSemaphoreKHR" signalSemaphoreKHR :: Device -> SemaphoreSignalInfo -> io () signalSemaphoreKHR = forall (io :: * -> *). MonadIO io => Device -> SemaphoreSignalInfo -> io () signalSemaphore -- No documentation found for TopLevel "VkSemaphoreWaitFlagsKHR" type SemaphoreWaitFlagsKHR = SemaphoreWaitFlags -- No documentation found for TopLevel "VkSemaphoreTypeKHR" type SemaphoreTypeKHR = SemaphoreType -- No documentation found for TopLevel "VkSemaphoreWaitFlagBitsKHR" type SemaphoreWaitFlagBitsKHR = SemaphoreWaitFlagBits -- No documentation found for TopLevel "VkPhysicalDeviceTimelineSemaphoreFeaturesKHR" type PhysicalDeviceTimelineSemaphoreFeaturesKHR = PhysicalDeviceTimelineSemaphoreFeatures -- No documentation found for TopLevel "VkPhysicalDeviceTimelineSemaphorePropertiesKHR" type PhysicalDeviceTimelineSemaphorePropertiesKHR = PhysicalDeviceTimelineSemaphoreProperties -- No documentation found for TopLevel "VkSemaphoreTypeCreateInfoKHR" type SemaphoreTypeCreateInfoKHR = SemaphoreTypeCreateInfo -- No documentation found for TopLevel "VkTimelineSemaphoreSubmitInfoKHR" type TimelineSemaphoreSubmitInfoKHR = TimelineSemaphoreSubmitInfo -- No documentation found for TopLevel "VkSemaphoreWaitInfoKHR" type SemaphoreWaitInfoKHR = SemaphoreWaitInfo -- No documentation found for TopLevel "VkSemaphoreSignalInfoKHR" type SemaphoreSignalInfoKHR = SemaphoreSignalInfo type KHR_TIMELINE_SEMAPHORE_SPEC_VERSION = 2 -- No documentation found for TopLevel "VK_KHR_TIMELINE_SEMAPHORE_SPEC_VERSION" pattern KHR_TIMELINE_SEMAPHORE_SPEC_VERSION :: forall a . Integral a => a pattern $bKHR_TIMELINE_SEMAPHORE_SPEC_VERSION :: forall a. Integral a => a $mKHR_TIMELINE_SEMAPHORE_SPEC_VERSION :: forall {r} {a}. Integral a => a -> ((# #) -> r) -> ((# #) -> r) -> r KHR_TIMELINE_SEMAPHORE_SPEC_VERSION = 2 type KHR_TIMELINE_SEMAPHORE_EXTENSION_NAME = "VK_KHR_timeline_semaphore" -- No documentation found for TopLevel "VK_KHR_TIMELINE_SEMAPHORE_EXTENSION_NAME" pattern KHR_TIMELINE_SEMAPHORE_EXTENSION_NAME :: forall a . (Eq a, IsString a) => a pattern $bKHR_TIMELINE_SEMAPHORE_EXTENSION_NAME :: forall a. (Eq a, IsString a) => a $mKHR_TIMELINE_SEMAPHORE_EXTENSION_NAME :: forall {r} {a}. (Eq a, IsString a) => a -> ((# #) -> r) -> ((# #) -> r) -> r KHR_TIMELINE_SEMAPHORE_EXTENSION_NAME = "VK_KHR_timeline_semaphore"