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[thirdparty/glibc.git] / sysdeps / unix / sysv / linux / sigwait.c

diff --git a/sysdeps/unix/sysv/linux/sigwait.c b/sysdeps/unix/sysv/linux/sigwait.c
index 6eb4cf95327791a6025acdac66f6aaeb535ef1fb..a304ed978bcdbd1dfba444e649abb9d6e303228b 100644 (file)
--- a/sysdeps/unix/sysv/linux/sigwait.c
+++ b/sysdeps/unix/sysv/linux/sigwait.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 1997, 1998, 2000, 2002 Free Software Foundation, Inc.
+/* Copyright (C) 1997,1998,2000,2002-2004,2005 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
@@ -12,37 +12,68 @@
    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.  */
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
 
 #include <errno.h>
 #include <signal.h>
 #define __need_NULL
 #include <stddef.h>
+#include <string.h>
 
-#include <sysdep.h>
+#include <sysdep-cancel.h>
 #include <sys/syscall.h>
 #include <bp-checks.h>
 
 #ifdef __NR_rt_sigtimedwait
-extern int __syscall_rt_sigtimedwait (const sigset_t *__unbounded, siginfo_t *__unbounded,
-                                     const struct timespec *__unbounded, size_t);
-
 
 /* Return any pending signal or wait for one for the given time.  */
-int
-__sigwait (set, sig)
-     const sigset_t *set;
-     int *sig;
+static int
+do_sigwait (const sigset_t *set, int *sig)
 {
   int ret;
 
+#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.  */
-  /* XXX INLINE_SYSCALL_NOERROR candiate.  */
-  ret =  INLINE_SYSCALL (rt_sigtimedwait, 4, CHECK_SIGSET (set),
-                        NULL, NULL, _NSIG / 8);
+#ifdef INTERNAL_SYSCALL
+  INTERNAL_SYSCALL_DECL (err);
+  do
+    ret = INTERNAL_SYSCALL (rt_sigtimedwait, err, 4, CHECK_SIGSET (set),
+                           NULL, NULL, _NSIG / 8);
+  while (INTERNAL_SYSCALL_ERROR_P (ret, err)
+        && INTERNAL_SYSCALL_ERRNO (ret, err) == EINTR);
+  if (! INTERNAL_SYSCALL_ERROR_P (ret, err))
+    {
+      *sig = ret;
+      ret = 0;
+    }
+  else
+    ret = INTERNAL_SYSCALL_ERRNO (ret, err);
+#else
+  do
+    ret = INLINE_SYSCALL (rt_sigtimedwait, 4, CHECK_SIGSET (set),
+                         NULL, NULL, _NSIG / 8);
+  while (ret == -1 && errno == EINTR);
   if (ret != -1)
     {
       *sig = ret;
@@ -50,11 +81,30 @@ __sigwait (set, sig)
     }
   else
     ret = errno;
+#endif
 
   return ret;
 }
+
+int
+__sigwait (set, sig)
+     const sigset_t *set;
+     int *sig;
+{
+  if (SINGLE_THREAD_P)
+    return do_sigwait (set, sig);
+
+  int oldtype = LIBC_CANCEL_ASYNC ();
+
+  int result = do_sigwait (set, sig);
+
+  LIBC_CANCEL_RESET (oldtype);
+
+  return result;
+}
 libc_hidden_def (__sigwait)
 weak_alias (__sigwait, sigwait)
 #else
 # include <sysdeps/posix/sigwait.c>
 #endif
+strong_alias (__sigwait, __libc_sigwait)