* cygwin.din (ppoll): Export.

* poll.cc (ppoll): Implement.
	* posix.sgml (std-gnu): Add ppoll.
	* include/cygwin/version.h: Bump API minor number.
	* include/sys/poll.h (ppoll): Declare.

winsup/cygwin/include/cygwin/version.h

@@ -404,12 +404,13 @@ details. */
       238: Export pthread_spin_destroy, pthread_spin_init, pthread_spin_lock,
 	   pthread_spin_trylock, pthread_spin_unlock.
       239: Export pthread_setschedprio.
+      240: Export ppoll.
      */
 
      /* Note that we forgot to bump the api for ualarm, strtoll, strtoull */
 
 #define CYGWIN_VERSION_API_MAJOR 0
-#define CYGWIN_VERSION_API_MINOR 239
+#define CYGWIN_VERSION_API_MINOR 240
 
      /* There is also a compatibity version number associated with the
 	shared memory regions.  It is incremented when incompatible

winsup/cygwin/include/sys/poll.h

@@ -1,6 +1,6 @@
 /* sys/poll.h
 
-   Copyright 2000, 2001, 2006 Red Hat, Inc.
+   Copyright 2000, 2001, 2006, 2011 Red Hat, Inc.
 
    This file is part of Cygwin.
 
@@ -12,6 +12,7 @@
 #define _SYS_POLL_H
 
 #include <sys/cdefs.h>
+#include <sys/types.h>
 
 __BEGIN_DECLS
 
@@ -39,6 +40,9 @@ struct pollfd {
 typedef unsigned int nfds_t;
 
 extern int poll __P ((struct pollfd *fds, nfds_t nfds, int timeout));
+extern int ppoll __P ((struct pollfd *fds, nfds_t nfds,
+		       const struct timespec *timeout_ts,
+		       const sigset_t *sigmask));
 
 __END_DECLS