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9.54 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.

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 — Obtain the C address of an object, C_F_POINTER — Convert C into Fortran pointer