add timerfd syscall and header

Signed-off-by: Austin Foxley <austinf@cetoncorp.com>
Signed-off-by: Stephan Raue <mailinglists@openelec.tv>

include/.gitignore

@@ -28,6 +28,7 @@
 /sys/regdef.h
 /sys/sysmips.h
 /sys/tas.h
+/sys/timerfd.h
 /sys/ucontext.h
 /sys/user.h
 /sys/vm86.h

libc/sysdeps/linux/common/Makefile.in

@@ -31,7 +31,7 @@ CSRC := $(filter-out capget.c capset.c inotify.c ioperm.c iopl.c madvise.c \
 	remap_file_pages.c sched_getaffinity.c sched_setaffinity.c \
 	sendfile64.c sendfile.c setfsgid.c setfsuid.c setresuid.c \
 	splice.c vmsplice.c tee.c signalfd.c swapoff.c swapon.c \
-	sync_file_range.c sysctl.c sysinfo.c uselib.c vhangup.c,$(CSRC))
+	sync_file_range.c sysctl.c sysinfo.c timerfd.c uselib.c vhangup.c,$(CSRC))
 endif
 
 ifneq ($(UCLIBC_BSD_SPECIFIC),y)

libc/sysdeps/linux/common/sys/timerfd.h

@@ -0,0 +1,60 @@
+/* Copyright (C) 2008 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+#ifndef	_SYS_TIMERFD_H
+#define	_SYS_TIMERFD_H	1
+
+#include <time.h>
+
+
+/* Bits to be set in the FLAGS parameter of `timerfd_create'.  */
+enum
+  {
+    TFD_CLOEXEC = 02000000,
+#define TFD_CLOEXEC TFD_CLOEXEC
+    TFD_NONBLOCK = 04000
+#define TFD_NONBLOCK TFD_NONBLOCK
+  };
+
+
+/* Bits to be set in the FLAGS parameter of `timerfd_settime'.  */
+enum
+  {
+    TFD_TIMER_ABSTIME = 1 << 0
+#define TFD_TIMER_ABSTIME TFD_TIMER_ABSTIME
+  };
+
+
+__BEGIN_DECLS
+
+/* Return file descriptor for new interval timer source.  */
+extern int timerfd_create (clockid_t __clock_id, int __flags) __THROW;
+
+/* Set next expiration time of interval timer source UFD to UTMR.  If
+   FLAGS has the TFD_TIMER_ABSTIME flag set the timeout value is
+   absolute.  Optionally return the old expiration time in OTMR.  */
+extern int timerfd_settime (int __ufd, int __flags,
+			    __const struct itimerspec *__utmr,
+			    struct itimerspec *__otmr) __THROW;
+
+/* Return the next expiration time of UFD.  */
+extern int timerfd_gettime (int __ufd, struct itimerspec *__otmr) __THROW;
+
+__END_DECLS
+
+#endif /* sys/timerfd.h */

libc/sysdeps/linux/common/timerfd.c

@@ -0,0 +1,32 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * timerfd_create() / timerfd_settime() / timerfd_gettime() for uClibc
+ *
+ * Copyright (C) 2009 Stephan Raue <stephan@openelec.tv>
+ *
+ * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
+ */
+
+#include <sys/syscall.h>
+#include <sys/timerfd.h>
+
+/*
+ * timerfd_create()
+ */
+#ifdef __NR_timerfd_create
+_syscall2(int, timerfd_create, int, clockid, int, flags)
+#endif
+
+/*
+ * timerfd_settime()
+ */
+#ifdef __NR_timerfd_settime
+_syscall4(int,timerfd_settime, int, ufd, int, flags, const struct itimerspec *, utmr, struct itimerspec *, otmr)
+#endif
+
+/*
+ * timerfd_gettime()
+ */
+#ifdef __NR_timerfd_gettime
+_syscall2(int, timerfd_gettime, int, ufd, struct itimerspec *, otmr)
+#endif