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plt-scheme  4.2.1
schfd.h
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00001 
00002 #ifdef USE_FAR_MZ_FDCALLS
00003 # define DECL_FDSET(n, c) static fd_set *n
00004 # define INIT_DECL_FDSET(n, c) (n = (n ? (fd_set *)scheme_init_fdset_array(n, c) : (fd_set *)scheme_alloc_fdset_array(c, 1)))
00005 #else
00006 # define DECL_FDSET(n, c) fd_set n[c]
00007 # define INIT_DECL_FDSET(n, c) /* empty */
00008 #endif