vkGetMemoryHostPointerPropertiesEXT - Get properties of external memory host pointer

Valid Usage

• handleType must be EXTERNAL_MEMORY_HANDLE_TYPE_HOST_ALLOCATION_BIT_EXT or EXTERNAL_MEMORY_HANDLE_TYPE_HOST_MAPPED_FOREIGN_MEMORY_BIT_EXT

• pHostPointer must be a pointer aligned to an integer multiple of PhysicalDeviceExternalMemoryHostPropertiesEXT::minImportedHostPointerAlignment
• If handleType is EXTERNAL_MEMORY_HANDLE_TYPE_HOST_ALLOCATION_BIT_EXT, pHostPointer must be a pointer to host memory
• If handleType is EXTERNAL_MEMORY_HANDLE_TYPE_HOST_MAPPED_FOREIGN_MEMORY_BIT_EXT, pHostPointer must be a pointer to host mapped foreign memory

Valid Usage (Implicit)

• device must be a valid Device handle

• handleType must be a valid ExternalMemoryHandleTypeFlagBits value
• pMemoryHostPointerProperties must be a valid pointer to a MemoryHostPointerPropertiesEXT structure

Return Codes

Success

• SUCCESS

Failure

• ERROR_OUT_OF_HOST_MEMORY
• ERROR_INVALID_EXTERNAL_HANDLE

See Also

Device, ExternalMemoryHandleTypeFlagBits, MemoryHostPointerPropertiesEXT

VkImportMemoryHostPointerInfoEXT - import memory from a host pointer

Description

Importing memory from a host pointer shares ownership of the memory between the host and the Vulkan implementation. The application can continue to access the memory through the host pointer but it is the application’s responsibility to synchronize device and non-device access to the payload as defined in Host Access to Device Memory Objects.

Applications can import the same payload into multiple instances of Vulkan and multiple times into a given Vulkan instance. However, implementations may fail to import the same payload multiple times into a given physical device due to platform constraints.

Importing memory from a particular host pointer may not be possible due to additional platform-specific restrictions beyond the scope of this specification in which case the implementation must fail the memory import operation with the error code ERROR_INVALID_EXTERNAL_HANDLE_KHR.

Whether device memory objects imported from a host pointer hold a reference to their payload is undefined. As such, the application must ensure that the imported memory range remains valid and accessible for the lifetime of the imported memory object.

Valid Usage

• If handleType is not 0, it must be supported for import, as reported in ExternalMemoryProperties

• If handleType is not 0, it must be EXTERNAL_MEMORY_HANDLE_TYPE_HOST_ALLOCATION_BIT_EXT or EXTERNAL_MEMORY_HANDLE_TYPE_HOST_MAPPED_FOREIGN_MEMORY_BIT_EXT
• pHostPointer must be a pointer aligned to an integer multiple of PhysicalDeviceExternalMemoryHostPropertiesEXT::minImportedHostPointerAlignment
• If handleType is EXTERNAL_MEMORY_HANDLE_TYPE_HOST_ALLOCATION_BIT_EXT, pHostPointer must be a pointer to allocationSize number of bytes of host memory, where allocationSize is the member of the MemoryAllocateInfo structure this structure is chained to
• If handleType is EXTERNAL_MEMORY_HANDLE_TYPE_HOST_MAPPED_FOREIGN_MEMORY_BIT_EXT, pHostPointer must be a pointer to allocationSize number of bytes of host mapped foreign memory, where allocationSize is the member of the MemoryAllocateInfo structure this structure is chained to

Valid Usage (Implicit)

• sType must be STRUCTURE_TYPE_IMPORT_MEMORY_HOST_POINTER_INFO_EXT

• handleType must be a valid ExternalMemoryHandleTypeFlagBits value

See Also

ExternalMemoryHandleTypeFlagBits, StructureType

VkMemoryHostPointerPropertiesEXT - Properties of external memory host pointer

Description

The value returned by memoryTypeBits must only include bits that identify memory types which are host visible.

Valid Usage (Implicit)

See Also

StructureType, getMemoryHostPointerPropertiesEXT

VkPhysicalDeviceExternalMemoryHostPropertiesEXT - Structure describing external memory host pointer limits that can be supported by an implementation

Members

The members of the PhysicalDeviceExternalMemoryHostPropertiesEXT structure describe the following implementation-dependent limits:

Description

If the PhysicalDeviceExternalMemoryHostPropertiesEXT structure is included in the pNext chain of PhysicalDeviceProperties2, it is filled with the implementation-dependent limits.

Valid Usage (Implicit)

See Also

DeviceSize, StructureType