LOCK_TYPE from ISO_FORTRAN_ENV
Standard: F77 F90 F95 F2003 F2008
＜Syntax＞
TYPE ( LOCK_TYPE )
CLASS ( LOCK_TYPE )
Something of type LOCK_TYPE, or which has a potential subobject component of type LOCK_TYPE, must be a variable or a data component.
A named variable of type LOCK_TYPE, or which has a potential subobject component of type LOCK_TYPE, must be a coarray.
A variable of type LOCK_TYPE must not be changed except via the LOCK and UNLOCK statements.
＜Semantics＞