acc_update_self – Update host memory from mapped device memory.#

Description

This function updates the host copy from the previously mapped device memory. The host memory is specified with the host address a and a length of len bytes.

In Fortran, two (2) forms are supported. In the first form, a specifies a contiguous array section. The second form a specifies a variable or array element and len specifies the length in bytes.

C/C++:

Prototype:

acc_update_self(h_void *a, size_t len);

Prototype:

acc_update_self_async(h_void *a, size_t len, int async);

Fortran:

Interface:

subroutine acc_update_self(a)

type, dimension(:[,:]...) :: a

Interface:

subroutine acc_update_self(a, len)

type, dimension(:[,:]...) :: a

integer len

Interface:

subroutine acc_update_self_async(a, async)

type, dimension(:[,:]...) :: a

integer(acc_handle_kind) :: async

Interface:

subroutine acc_update_self_async(a, len, async)

type, dimension(:[,:]...) :: a

integer len

integer(acc_handle_kind) :: async

Reference:

OpenACC specification v2.6, section 3.2.25.