extern int x1f4_call_shuffle
(void *subtext, struct x1f4_transfer_type **transfer);
The x1f4_call_shuffle function stores the address of the struct
x1f4_transfer_type record embedded in the subtext step by step
execution context at transfer.
See struct x1f4_transfer_type.
The record will describe the function calls that require action to be taken outside the interpreter control.
See Outside Procedural Interpreter Control.
The function returns 0.