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6.33 acc_memcpy_device – Copy memory within a device. ¶

Description

This function copies device memory from one memory location to another on the current device. It copies bytes bytes of data from the device address, specified by data_dev_src, to the device address data_dev_dest. The _async version performs the transfer asynchronously using the queue associated with async_arg.

C/C++:

Prototype:	void acc_memcpy_device(d_void* data_dev_dest,
	d_void* data_dev_src, size_t bytes);
Prototype:	void acc_memcpy_device_async(d_void* data_dev_dest,
	d_void* data_dev_src, size_t bytes, int async_arg);

Fortran:

Interface:	subroutine acc_memcpy_device(data_dev_dest, &
	data_dev_src, bytes)
Interface:	subroutine acc_memcpy_device_async(data_dev_dest, &
	data_dev_src, bytes, async_arg)
	type(c_ptr), value :: data_dev_dest
	type(c_ptr), value :: data_dev_src
	integer(c_size_t), value :: bytes
	integer(acc_handle_kind), value :: async_arg

Reference:

OpenACC specification v2.6, section 3.2.33. OpenACC specification v3.3, section 3.2.28.