write_checkpoint_2d Subroutine

public subroutine write_checkpoint_2d(state, base, t, iter, is_ok, message, written_file, t_comp)

Write a checkpoint: gather to root, write the global file on rank 0, agree outcome across ranks, update the latest_checkpoint_2d pointer file.

absent is written as 0, matching a fresh (non-restarted) run's value.

Arguments

Type	Intent	Optional	Attributes		Name
type(solver_state_2d_t),	intent(in)			::	state
character(len=*),	intent(in)			::	base
real(kind=wp),	intent(in)			::	t
integer,	intent(in)			::	iter
logical,	intent(out),	optional		::	is_ok
character(len=*),	intent(out),	optional		::	message
character(len=*),	intent(out),	optional		::	written_file	Path of the file actually written (<base>_<iter>.bin), set only on success; mirrors checkpoint.f90's write_checkpoint contract.
real(kind=wp),	intent(in),	optional		::	t_comp	Optional Kahan compensation term for t (v6, Q2d);