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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.