PL/I fetching C

A PL/I routine can fetch a C function or another PL/I routine that is statically linked to a C function. Any C routine that is either directly or indirectly fetched by PL/I must be either naturally reentrant or be non-reentrant (that is, it cannot have constructed reentrancy via the RENT option and the prelinker).

The declaration of a C fetched routine within a PL/I routine is shown in Figure 1.

Figure 1. PL/I fetching a C routine

 
DCL CENTRY EXTERNAL ENTRY;  /* declare C entry point */
    .
    .
    .

FETCH CENTRY;         /* fetch the routine     */
CALL CENTRY(args);    /* call routine          */