aclrtHostGetDevicePointer

Applicability

Product	Supported
Atlas 350 Accelerator Card	x
Atlas A3 training product/Atlas A3 inference product	√
Atlas A2 training product/Atlas A2 inference product	√
Atlas 200I/500 A2 inference product	x
Atlas inference product	x
Atlas training product	x

Description

Obtains the device memory address registered and mapped by the aclrtHostRegister or aclrtHostRegisterV2 API. This address cannot be used for memory operations, such as memory copy.

Prototype

aclError aclrtHostGetDevicePointer(void *pHost, void **pDevice, uint32_t flag)

Parameters

Parameter	Input/Output	Description
pHost	Input	Host memory address registered and mapped by the aclrtHostRegisterV2 API.
pDevice	Output	Device memory address mapped from the host memory.
flag	Input	Reserved. The value is fixed at 0.

Returns

0 on success; otherwise, failure. For details, see aclError.

Parent topic: Memory Management