From c68d0fa2d88fc2134a38d99e7e944828384a7671 Mon Sep 17 00:00:00 2001
From: Austin Foxley <austinf@cetoncorp.com>
Date: Sat, 17 Oct 2009 12:26:24 -0700
Subject: libpthread/nptl: core of the "Native Posix Threading Library" for
 uClibc

targetting arm,sh,i386,mips,sparc for now

Signed-off-by: Austin Foxley <austinf@cetoncorp.com>
---
 .../nptl/sysdeps/unix/sysv/linux/sigtimedwait.c    | 88 ++++++++++++++++++++++
 1 file changed, 88 insertions(+)
 create mode 100644 libpthread/nptl/sysdeps/unix/sysv/linux/sigtimedwait.c

(limited to 'libpthread/nptl/sysdeps/unix/sysv/linux/sigtimedwait.c')

diff --git a/libpthread/nptl/sysdeps/unix/sysv/linux/sigtimedwait.c b/libpthread/nptl/sysdeps/unix/sysv/linux/sigtimedwait.c
new file mode 100644
index 000000000..5159bf9b8
--- /dev/null
+++ b/libpthread/nptl/sysdeps/unix/sysv/linux/sigtimedwait.c
@@ -0,0 +1,88 @@
+/* Copyright (C) 1997,1998,2000,2002,2003,2004 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.  */
+
+#include <pthreadP.h>
+#include <errno.h>
+#include <signal.h>
+#include <string.h>
+
+#include <sysdep-cancel.h>
+#include <sys/syscall.h>
+
+#ifdef __NR_rt_sigtimedwait
+
+static int
+do_sigtimedwait (const sigset_t *set, siginfo_t *info,
+		 const struct timespec *timeout)
+{
+#ifdef SIGCANCEL
+  sigset_t tmpset;
+  if (set != NULL
+      && (__builtin_expect (__sigismember (set, SIGCANCEL), 0)
+# ifdef SIGSETXID
+	  || __builtin_expect (__sigismember (set, SIGSETXID), 0)
+# endif
+	  ))
+    {
+      /* Create a temporary mask without the bit for SIGCANCEL set.  */
+      // We are not copying more than we have to.
+      memcpy (&tmpset, set, _NSIG / 8);
+      __sigdelset (&tmpset, SIGCANCEL);
+# ifdef SIGSETXID
+      __sigdelset (&tmpset, SIGSETXID);
+# endif
+      set = &tmpset;
+    }
+#endif
+
+    /* XXX The size argument hopefully will have to be changed to the
+       real size of the user-level sigset_t.  */
+  int result = INLINE_SYSCALL (rt_sigtimedwait, 4, set,
+			       info, timeout, _NSIG / 8);
+
+  /* The kernel generates a SI_TKILL code in si_code in case tkill is
+     used.  tkill is transparently used in raise().  Since having
+     SI_TKILL as a code is useful in general we fold the results
+     here.  */
+  if (result != -1 && info != NULL && info->si_code == SI_TKILL)
+    info->si_code = SI_USER;
+
+  return result;
+}
+
+
+/* Return any pending signal or wait for one for the given time.  */
+int attribute_hidden
+__sigtimedwait (const sigset_t *set, siginfo_t *info,
+		const struct timespec *timeout)
+{
+  if (SINGLE_THREAD_P)
+    return do_sigtimedwait (set, info, timeout);
+
+  int oldtype = LIBC_CANCEL_ASYNC ();
+
+  /* XXX The size argument hopefully will have to be changed to the
+     real size of the user-level sigset_t.  */
+  int result = do_sigtimedwait (set, info, timeout);
+
+  LIBC_CANCEL_RESET (oldtype);
+
+  return result;
+}
+weak_alias (__sigtimedwait, sigtimedwait)
+#endif
-- 
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