1 files changed, 87 insertions, 0 deletions
diff --git a/nptl/sysdeps/unix/sysv/linux/sem_timedwait.c b/nptl/sysdeps/unix/sysv/linux/sem_timedwait.c
new file mode 100644
index 0000000000..e1b32f4e78
--- /dev/null
+++ b/nptl/sysdeps/unix/sysv/linux/sem_timedwait.c
@@ -0,0 +1,87 @@
+/* sem_timedwait -- wait on a semaphore.  Generic futex-using version.
+   Copyright (C) 2003 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Paul Mackerras <paulus@au.ibm.com>, 2003.
+
+   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.  */
+
+#include <errno.h>
+#include <sysdep.h>
+#include <lowlevellock.h>
+#include <internaltypes.h>
+#include <semaphore.h>
+
+#include <shlib-compat.h>
+
+
+int
+sem_timedwait (sem_t *sem, const struct timespec *abstime)
+{
+  int *futex = (int *) sem;
+  int val;
+  int err;
+
+  if (*futex > 0)
+    {
+      val = __lll_dec_if_positive (futex);
+      if (val > 0)
+	return 0;
+    }
+
+  err = -EINVAL;
+  if (abstime->tv_nsec >= 1000000000)
+    goto error_return;
+
+  do
+    {
+      struct timeval tv;
+      struct timespec rt;
+      int sec, nsec;
+
+      /* Get the current time.  */
+      __gettimeofday (&tv, NULL);
+
+      /* Compute relative timeout.  */
+      sec = abstime->tv_sec - tv.tv_sec;
+      nsec = abstime->tv_nsec - tv.tv_usec * 1000;
+      if (nsec < 0)
+	{
+	  nsec += 1000000000;
+	  --sec;
+	}
+
+      /* Already timed out?  */
+      err = -ETIMEDOUT;
+      if (sec < 0)
+	goto error_return;
+
+      /* Do wait.  */
+      rt.tv_sec = sec;
+      rt.tv_nsec = nsec;
+      err = lll_futex_timed_wait (futex, 0, &rt);
+      if (err != 0 && err != -EWOULDBLOCK)
+	goto error_return;
+
+      val = __lll_dec_if_positive (futex);
+    }
+  while (val <= 0);
+
+  return 0;
+
+ error_return:
+  __set_errno (-err);
+  return -1;
+}