Merged in paulpatience/nuttx (pull request #27)

libxx: Add __cxa_guard_acquire, __cxa_guard_release and __cxa_guard_abort

libxx/Makefile

@@ -50,7 +50,7 @@ endif
 
 ifneq ($(CONFIG_UCLIBCXX),y)
 CXXSRCS += libxx_delete.cxx libxx_deletea.cxx libxx_new.cxx libxx_newa.cxx
-CXXSRCS += libxx_stdthrow.cxx
+CXXSRCS += libxx_stdthrow.cxx libxx_cxa_guard.cxx
 else
 ifneq ($(UCLIBCXX_EXCEPTION),y)
 CXXSRCS += libxx_stdthrow.cxx

libxx/libxx_cxa_guard.cxx

+//***************************************************************************
+// libxx/libxx_cxa_guard.cxx
+//
+//   Copyright (C) 2015 Omni Hoverboards Inc. All rights reserved.
+//   Author: Paul Alexander Patience <paul-a.patience@polymtl.ca>
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions
+// are met:
+//
+// 1. Redistributions of source code must retain the above copyright
+//    notice, this list of conditions and the following disclaimer.
+// 2. Redistributions in binary form must reproduce the above copyright
+//    notice, this list of conditions and the following disclaimer in
+//    the documentation and/or other materials provided with the
+//    distribution.
+// 3. Neither the name NuttX nor the names of its contributors may be
+//    used to endorse or promote products derived from this software
+//    without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+// FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+// COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+// BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+// OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+// AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+// ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+// POSSIBILITY OF SUCH DAMAGE.
+//
+//***************************************************************************
+
+//***************************************************************************
+// Included Files
+//***************************************************************************
+
+#include <nuttx/compiler.h>
+
+//***************************************************************************
+// Pre-processor Definitions
+//***************************************************************************
+
+//***************************************************************************
+// Private Types
+//***************************************************************************
+
+__extension__ typedef int __guard __attribute__((mode(__DI__)));
+
+//***************************************************************************
+// Private Data
+//***************************************************************************
+
+//***************************************************************************
+// Public Functions
+//***************************************************************************
+
+extern "C"
+{
+  //*************************************************************************
+  // Name: __cxa_guard_acquire
+  //*************************************************************************
+
+  int __cxa_guard_acquire(FAR __guard *g)
+  {
+    return !*g;
+  }
+
+  //*************************************************************************
+  // Name: __cxa_guard_release
+  //*************************************************************************
+
+  void __cxa_guard_release(FAR __guard *g)
+  {
+    *g = 1;
+  }
+
+  //*************************************************************************
+  // Name: __cxa_guard_abort
+  //*************************************************************************
+
+  void __cxa_guard_abort(FAR __guard *)
+  {
+  }
+}