VkExportMemoryWin32HandleInfoKHR

To specify additional attributes of NT handles exported from a memory object, add a VkExportMemoryWin32HandleInfoKHR structure to the pNext chain of the VkMemoryAllocateInfo structure. The VkExportMemoryWin32HandleInfoKHR structure is defined as:

typedef struct VkExportMemoryWin32HandleInfoKHR {
    VkStructureType sType;
    const void* pNext;
    const SECURITY_ATTRIBUTES* pAttributes;
    DWORD dwAccess;
    LPCWSTR name;
} VkExportMemoryWin32HandleInfoKHR;

• sType is a VkStructureType value identifying this structure.
• pNext is NULL or a pointer to a structure extending this structure.
• pAttributes is a pointer to a Windows SECURITY_ATTRIBUTES structure specifying security attributes of the handle.
• dwAccess is a DWORD specifying access rights of the handle.
• name is a null-terminated UTF-16 string to associate with the payload referenced by NT handles exported from the created memory.

If VkExportMemoryAllocateInfo is not included in the same pNext chain, this structure is ignored.

If VkExportMemoryAllocateInfo is included in the pNext chain of VkMemoryAllocateInfo with a Windows handleType, but either VkExportMemoryWin32HandleInfoKHR is not included in the pNext chain, or it is included but pAttributes is set to NULL, default security descriptor values will be used, and child processes created by the application will not inherit the handle, as described in the MSDN documentation for Synchronization Object Security and Access Rights¹. Further, if the structure is not present, the access rights used depend on the handle type.

For handles of the following types:

• VK_EXTERNAL_MEMORY_HANDLE_TYPE_OPAQUE_WIN32_BIT

The implementation must ensure the access rights allow read and write access to the memory.