acc_create (GNU libgomp)

### 6.20 `acc_create` – Allocate device memory and map it to host memory. ¶

Description

  This function allocates device memory and maps it to host memory specified by the host address a with a length of len bytes. In C/C++, the function returns the device address of the allocated device memory.

  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: | `void *acc_create(h_void *a, size_t len);`
  Prototype: | `void *acc_create_async(h_void *a, size_t len, int async);`

Fortran:

  Interface: | `subroutine acc_create(a)`
  | `type(*), dimension(..) :: a`
  Interface: | `subroutine acc_create(a, len)`
  | `type(*), dimension(..) :: a`
  | `integer len`
  Interface: | `subroutine acc_create_async(a, async)`
  | `type(*), dimension(..) :: a`
  | `integer(acc_handle_kind) :: async`
  Interface: | `subroutine acc_create_async(a, len, async)`
  | `type(*), dimension(..) :: a`
  | `integer len`
  | `integer(acc_handle_kind) :: async`

Reference:

  OpenACC specification v2.6, section 3.2.21.