+#elif HAVE_GETDTABLESIZE
+
+# include <sys/resource.h>
+# undef getdtablesize
+
+int
+rpl_getdtablesize(void)
+{
+ /* To date, this replacement is only compiled for Cygwin 1.7.25,
+ which auto-increased the RLIMIT_NOFILE soft limit until it
+ hits the compile-time constant hard limit of 3200. Although
+ that version of cygwin supported a child process inheriting
+ a smaller soft limit, the smaller limit is not enforced, so
+ we might as well just report the hard limit. */
+ struct rlimit lim;
+ if (!getrlimit (RLIMIT_NOFILE, &lim) && lim.rlim_max != RLIM_INFINITY)
+ return lim.rlim_max;
+ return getdtablesize ();
+}
+