C Specification

The VkPhysicalDeviceExternalSciSync2FeaturesNV structure is defined as:

// Provided by VK_NV_external_sci_sync2
typedef struct VkPhysicalDeviceExternalSciSync2FeaturesNV {
    VkStructureType    sType;
    void*              pNext;
    VkBool32           sciSyncFence;
    VkBool32           sciSyncSemaphore2;
    VkBool32           sciSyncImport;
    VkBool32           sciSyncExport;
} VkPhysicalDeviceExternalSciSync2FeaturesNV;

Members

The members of the VkPhysicalDeviceExternalSciSync2FeaturesNV structure describe the following features:

Description

  • sciSyncFence indicates whether external fences created with a handle type of VK_EXTERNAL_FENCE_HANDLE_TYPE_SCI_SYNC_OBJ_BIT_NV and VK_EXTERNAL_FENCE_HANDLE_TYPE_SCI_SYNC_FENCE_BIT_NV are supported for import and/or export.

  • sciSyncSemaphore2 indicates whether semaphore SciSync pools are supported and semaphores can be created from NvSciSyncObj via VkSemaphoreSciSyncPoolNV objects. In this case, the application is responsible for the resource management of the NvSciSyncObj.

  • sciSyncImport indicates whether NvSciSyncObj import functionality is supported. If sciSyncImport is VK_TRUE, VkFence and/or VkSemaphore support importing NvSciSyncObj from applications. In this case, the application is responsible for the resource management of the NvSciSyncObj.

  • sciSyncExport indicates whether NvSciSyncObj export functionality is supported. If sciSyncExport is VK_TRUE, VkFence supports exporting NvSciSyncObj created by the driver to applications. In this case, the driver is responsible for the resource management of the NvSciSyncObj.

Table 1. Functionality Supported for NvSciSync Features

Features

sciSyncImport

sciSyncExport

Always supported1

sciSyncFence

vkImportFenceSciSyncFenceNV, vkImportFenceSciSyncObjNV

VkExportFenceSciSyncInfoNV

vkGetFenceSciSyncFenceNV, vkGetFenceSciSyncObjNV, vkGetPhysicalDeviceSciSyncAttributesNV (with VK_SCI_SYNC_PRIMITIVE_TYPE_FENCE_NV)

sciSyncSemaphore2

vkCreateSemaphoreSciSyncPoolNV, VkSemaphoreSciSyncCreateInfoNV

n/a

vkGetPhysicalDeviceSciSyncAttributesNV (with VK_SCI_SYNC_PRIMITIVE_TYPE_SEMAPHORE_NV)
1

Functionality in this column is always available.

The Functionality supported for NvSciSync features table summarizes the functionality enabled by the VkPhysicalDeviceExternalSciSync2FeaturesNV structure. There are two orthogonal pieces of functionality: fence and semaphore support; import and export support. Each entry in the body of the table summarizes the functionality that can be used when the given features are supported and enabled. This summarizes Valid Usage statements that are added elsewhere in this specification.

If the VkPhysicalDeviceExternalSciSync2FeaturesNV structure is included in the pNext chain of the VkPhysicalDeviceFeatures2 structure passed to vkGetPhysicalDeviceFeatures2, it is filled in to indicate whether each corresponding feature is supported. If the application wishes to use a VkDevice with any features described by VkPhysicalDeviceExternalSciSync2FeaturesNV, it must add an instance of the structure, with the desired feature members set to VK_TRUE, to the pNext chain of VkDeviceCreateInfo when creating the VkDevice.

Valid Usage (Implicit)

  • VUID-VkPhysicalDeviceExternalSciSync2FeaturesNV-sType-sType
    sType must be VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_EXTERNAL_SCI_SYNC_2_FEATURES_NV

See Also

VK_NV_external_sci_sync2, VkBool32, VkStructureType

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 2014-2025 The Khronos Group Inc.

SPDX-License-Identifier: CC-BY-4.0