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GENPTR_SUBROUTINE - Generate a pointer to a SUBROUTINE argument.

Description:
Ensure that there exists a pointer to the subroutine that has been passed as an actual argument from FORTRAN to the C function. Since FORTRAN usually passes arguments by reference, the pointer is commonly available directly from the argument list, so this macro is null.

Invocation:
GENPTR_SUBROUTINE(name)

Arguments:

name
The dummy argument.

Examples:

GENPTR_SUBROUTINE(name)
will expand as follows:

All systems:


Notes:
The dummy argument should have been declared with the SUBROUTINE macro.



next up previous 252
Next: SUBROUTINE - Declare a SUBROUTINE argument.
Up: Full Description of F77 Macros
Previous: GENPTR_CHARACTER_ARRAY - Generate a pointer to a CHARACTER array argument

CNF and F77 Mixed Language Programming -- FORTRAN and C
Starlink User Note 209
P.M. Allan
A.J. Chipperfield
R.F. Warren-Smith
19 January 2000
E-mail:ussc@star.rl.ac.uk