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diff --git a/winsup/cygwin/include/sched.h b/winsup/cygwin/include/sched.h
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+/* sched.h: scheduler interface for Cygwin
+
+ Copyright 2001 Red Hat, Inc.
+
+ Written by Robert Collins <rbtcollins@hotmail.com>
+
+ This file is part of Cygwin.
+
+ This software is a copyrighted work licensed under the terms of the
+ Cygwin license. Please consult the file "CYGWIN_LICENSE" for
+ details. */
+
+/* Written from the opengroup specifications */
+
+#ifndef _SCHED_H
+#define _SCHED_H
+#include <time.h>
+
+/* we return -1 and set errno on failure */
+#define SCHED_FIFO 1
+#define SCHED_RR 2
+#define SCHED_OTHER 3
+
+struct sched_param
+{
+ int sched_priority;
+};
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* max priority for policy */
+ int sched_get_priority_max (int);
+/* min priority for policy */
+ int sched_get_priority_min (int);
+/* get sched params for process */
+ int sched_getparam (pid_t, struct sched_param *);
+/* get the scheduler for pid */
+ int sched_getscheduler (pid_t);
+/* get the time quantum for pid */
+ int sched_rr_get_interval (pid_t, struct timespec *);
+/* set the scheduling parameters */
+ int sched_setparam (pid_t, const struct sched_param *);
+/* set the scheduler */
+ int sched_setscheduler (pid_t, int, const struct sched_param *);
+/* yield the cpu */
+ int sched_yield (void);
+
+#ifdef __cplusplus
+}
+#endif
+#endif /* _SCHED_H */