RE: Pass parameters by value

If MI may call ILE like this:

DCL DD X BIN(4);
DCL DD Y BIN(4);
DCL OL A (X, Y) ARG;
CALLX ?ILEPROGRAM, A, *;

Pseudo-C code in the ILE PEP may do this:

user_entry_proc( *( _OPM_PARM_ADDR( 1 )), *( _OPM_PARM_ADDR( 2 )));

Then pseudo-C code in the UEP may do this:

void user_entry_proc( int X, int Y )
{
}

It may, but, the ILE front-ends won't!

Instead, we get this (pseudo-C code) from CRTRPGMOD, CRTCMOD, etc:

void user_entry_proc( int *X, int *Y)
{
}

Why does IBM disallow direct, non-pointer parameters into ILE while the
W-code allows it?