sigwait implementation for Linux based in sigtimedwait syscall.

sysdeps/unix/sysv/linux/sigwait.c

@@ -0,0 +1,54 @@
+/* Copyright (C) 1997, 1998, 2000, 2002 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 <errno.h>
+#include <signal.h>
+#define __need_NULL
+#include <stddef.h>
+
+#include <sysdep.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;
+{
+  siginfo_t info;
+  int ret;
+
+  /* XXX The size argument hopefully will have to be changed to the
+     real size of the user-level sigset_t.  */
+  ret =  INLINE_SYSCALL (rt_sigtimedwait, 4, CHECK_SIGSET (set),
+			 CHECK_1 (&info), NULL, _NSIG / 8);
+  if (ret == 0)
+    *sig = info.si_signo;
+
+  return ret;
+}
+weak_alias (__sigwait, sigwait)
+#else
+# include <sysdeps/posix/sigwait.c>
+#endif