1 files changed, 87 insertions, 0 deletions
diff --git a/linuxthreads/sysdeps/unix/sysv/linux/allocrtsig.c b/linuxthreads/sysdeps/unix/sysv/linux/allocrtsig.c
new file mode 100644
index 0000000000..af1581a4c3
--- /dev/null
+++ b/linuxthreads/sysdeps/unix/sysv/linux/allocrtsig.c
@@ -0,0 +1,87 @@
+/* Handle real-time signal allocation.
+   Copyright (C) 1997,98,99,2002 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
+
+   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 <signal.h>
+
+/* Sanity check.  */
+#if !defined __SIGRTMIN || (__SIGRTMAX - __SIGRTMIN) < 3
+# error "This must not happen"
+#endif
+
+static int current_rtmin;
+static int current_rtmax;
+
+static int initialized;
+
+#include <testrtsig.h>
+
+static void
+init (void)
+{
+  if (!kernel_has_rtsig ())
+    {
+      current_rtmin = -1;
+      current_rtmax = -1;
+    }
+  else
+    {
+      current_rtmin = __SIGRTMIN + 3;
+      current_rtmax = __SIGRTMAX;
+    }
+  initialized = 1;
+}
+
+/* Return number of available real-time signal with highest priority.  */
+int
+__libc_current_sigrtmin (void)
+{
+  if (!initialized)
+    init ();
+  return current_rtmin;
+}
+strong_alias (__libc_current_sigrtmin, __libc_current_sigrtmin_private);
+libc_hidden_def (__libc_current_sigrtmin)
+
+/* Return number of available real-time signal with lowest priority.  */
+int
+__libc_current_sigrtmax (void)
+{
+  if (!initialized)
+    init ();
+  return current_rtmax;
+}
+strong_alias (__libc_current_sigrtmax, __libc_current_sigrtmax_private);
+libc_hidden_def (__libc_current_sigrtmax)
+
+/* Allocate real-time signal with highest/lowest available
+   priority.  Please note that we don't use a lock since we assume
+   this function to be called at program start.  */
+int
+__libc_allocate_rtsig (int high)
+{
+  if (!initialized)
+    init ();
+  if (current_rtmin == -1 || current_rtmin > current_rtmax)
+    /* We don't have anymore signal available.  */
+    return -1;
+
+  return high ? current_rtmin++ : current_rtmax--;
+}
+strong_alias (__libc_allocate_rtsig, __libc_allocate_rtsig_private);