1 files changed, 118 insertions, 0 deletions
diff --git a/libstdc++-v3/libsupc++/eh_globals.cc b/libstdc++-v3/libsupc++/eh_globals.cc
new file mode 100644
index 00000000000..3033619b12a
--- /dev/null
+++ b/libstdc++-v3/libsupc++/eh_globals.cc
@@ -0,0 +1,118 @@
+// -*- C++ -*- Manage the thread-local exception globals.
+// Copyright (C) 2001 Free Software Foundation, Inc.
+//
+// This file is part of GNU CC.
+//
+// GNU CC is free software; you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation; either version 2, or (at your option)
+// any later version.
+//
+// GNU CC 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 General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with GNU CC; see the file COPYING.  If not, write to
+// the Free Software Foundation, 59 Temple Place - Suite 330,
+// Boston, MA 02111-1307, USA.
+
+// As a special exception, you may use this file as part of a free software
+// library without restriction.  Specifically, if other files instantiate
+// templates or use macros or inline functions from this file, or you compile
+// this file and link it with other files to produce an executable, this
+// file does not by itself cause the resulting executable to be covered by
+// the GNU General Public License.  This exception does not however
+// invalidate any other reasons why the executable file might be covered by
+// the GNU General Public License.
+
+
+#include <exception>
+#include <cstdlib>
+#include "unwind-cxx.h"
+#include "bits/c++config.h"
+#include "bits/gthr.h"
+
+using namespace __cxxabiv1;
+
+
+// Single-threaded fallback buffer.
+static __cxa_eh_globals globals_static;
+
+#if __GTHREADS
+static __gthread_key_t globals_key;
+static int use_thread_key = -1;
+
+static void
+get_globals_dtor (void *ptr)
+{
+  __gthread_key_dtor (globals_key, ptr);
+  if (ptr)
+    std::free (ptr);
+}
+
+static void
+get_globals_init ()
+{
+  use_thread_key =
+    (__gthread_key_create (&globals_key, get_globals_dtor) == 0);
+}
+
+static void
+get_globals_init_once ()
+{
+  static __gthread_once_t once = __GTHREAD_ONCE_INIT;
+  if (__gthread_once (&once, get_globals_init) != 0
+      || use_thread_key < 0)
+    use_thread_key = 0;
+}
+#endif
+
+extern "C" __cxa_eh_globals *
+__cxa_get_globals_fast ()
+{
+#if __GTHREADS
+  if (use_thread_key)
+    return (__cxa_eh_globals *) __gthread_getspecific (globals_key);
+  else
+    return &globals_static;
+#else
+  return &globals_static;
+#endif
+}
+
+extern "C" __cxa_eh_globals *
+__cxa_get_globals ()
+{
+#if __GTHREADS
+  __cxa_eh_globals *g;
+
+  if (use_thread_key == 0)
+    return &globals_static;
+
+  if (use_thread_key < 0)
+    {
+      get_globals_init_once ();
+
+      // Make sure use_thread_key got initialized.
+      if (use_thread_key == 0)
+	return &globals_static;
+    }
+
+  g = (__cxa_eh_globals *) __gthread_getspecific (globals_key);
+  if (! g)
+    {
+      if ((g = (__cxa_eh_globals *)
+	   std::malloc (sizeof (__cxa_eh_globals))) == 0
+	  || __gthread_setspecific (globals_key, (void *) g) != 0)
+        std::terminate ();
+      g->caughtExceptions = 0;
+      g->uncaughtExceptions = 0;
+    }
+
+  return g;
+#else
+  return &globals_static;
+#endif
+}