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3.7.10 omp_target_memset – Set bytes in device memory asynchronously ¶

Description:

This routine fills memory on the device identified by device number device_num. Starting from the device address ptr, the first count bytes are set to the value val, converted to unsigned char. If count is zero, the routine has no effect; if ptr is NULL, the behavior is unspecified. Task dependence is expressed by passing an array of depend objects to depobj_list, where the number of array elements is passed as depobj_count; if the count is zero, the depobj_list argument is ignored. In C++ and Fortran, the depobj_list argument can also be omitted in that case. The function returns ptr.

The device_num must be a conforming device number and ptr must be a valid device pointer for that device. Running this routine in a target region except on the initial device is not supported.

C/C++

Prototype:	void *omp_target_memcpy_async(void *ptr,
	int val,
	size_t count,
	int device_num,
	int depobj_count,
	omp_depend_t *depobj_list)

Fortran:

Interface:	type(c_ptr) function omp_target_memset_async( &
	ptr, val, count, device_num, &
	depobj_count, depobj_list) bind(C)
	use, intrinsic :: iso_c_binding, only: c_ptr, c_size_t, c_int
	type(c_ptr), value :: ptr
	integer(c_size_t), value :: count
	integer(c_int), value :: val, device_num, depobj_count
	integer(omp_depend_kind), optional :: depobj_list(*)

See also:

omp_target_memset – Set bytes in device memory

Reference:

OpenMP specification v6.0, Section 25.8.2