7.34 C_F_PROCPOINTER — Convert C into Fortran procedure pointer

Description:

C_F_PROCPOINTER(CPTR, FPTR) Assign the target of the C function pointer CPTR to the Fortran procedure pointer FPTR.

Note: Due to the currently lacking support of procedure pointers in GNU Fortran this function is not fully operable.

Standard:

Fortran 2003 and later

Class:

Subroutine

Syntax:

CALL C_F_PROCPOINTER(cptr, fptr)

Arguments:

CPTR	scalar of the type C_FUNPTR. It is INTENT(IN).
FPTR	procedure pointer interoperable with cptr. It is INTENT(OUT).

Example:

          program main
            use iso_c_binding
            implicit none
            abstract interface
              function func(a)
                import :: c_float
                real(c_float), intent(in) :: a
                real(c_float) :: func
              end function
            end interface
            interface
               function getIterFunc() bind(c,name="getIterFunc")
                 import :: c_funptr
                 type(c_funptr) :: getIterFunc
               end function
            end interface
            type(c_funptr) :: cfunptr
            procedure(func), pointer :: myFunc
            cfunptr = getIterFunc()
            call c_f_procpointer(cfunptr, myFunc)
          end program main
     

See also:

C_LOC, C_F_POINTER