C_ASSOCIATED
— Status of a C pointerC_ASSOCIATED(c_prt_1[, c_ptr_2])
determines the status of the C pointer
c_ptr_1 or if c_ptr_1 is associated with the target c_ptr_2.
RESULT = C_ASSOCIATED(c_prt_1[, c_ptr_2])
c_ptr_1 | Scalar of the type C_PTR or C_FUNPTR .
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c_ptr_2 | (Optional) Scalar of the same type as c_ptr_1.
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LOGICAL
; it is .false.
if either
c_ptr_1 is a C NULL pointer or if c_ptr1 and c_ptr_2
point to different addresses.
subroutine association_test(a,b) use iso_c_binding, only: c_associated, c_loc, c_ptr implicit none real, pointer :: a type(c_ptr) :: b if(c_associated(b, c_loc(a))) & stop 'b and a do not point to same target' end subroutine association_test