acc_copyin – Allocate device memory and copy host memory to it.#
- Description
In C/C++, this function allocates
len
bytes of device memory and maps it to the specified host address ina
. The device address of the newly allocated device memory is returned.In Fortran, two (2) forms are supported. In the first form,
a
specifies a contiguous array section. The second forma
specifies a variable or array element andlen
specifies the length in bytes.- C/C++:
Prototype:
void *acc_copyin(h_void *a, size_t len);
Prototype:
void *acc_copyin_async(h_void *a, size_t len, int async);
- Fortran:
Interface:
subroutine acc_copyin(a)
type, dimension(:[,:]...) :: a
Interface:
subroutine acc_copyin(a, len)
type, dimension(:[,:]...) :: a
integer len
Interface:
subroutine acc_copyin_async(a, async)
type, dimension(:[,:]...) :: a
integer(acc_handle_kind) :: async
Interface:
subroutine acc_copyin_async(a, len, async)
type, dimension(:[,:]...) :: a
integer len
integer(acc_handle_kind) :: async
- Reference:
OpenACC specification v2.6, section 3.2.20.