1 files changed, 146 insertions, 0 deletions
diff --git a/nuttx/libxx/libxx_cxa_atexit.cxx b/nuttx/libxx/libxx_cxa_atexit.cxx
new file mode 100644
index 000000000..cd31f94f6
--- /dev/null
+++ b/nuttx/libxx/libxx_cxa_atexit.cxx
@@ -0,0 +1,146 @@
+//***************************************************************************
+// libxx/libxx_eabi_atexit.cxx
+//
+//   Copyright (C) 2012 Gregory Nutt. All rights reserved.
+//   Author: Gregory Nutt <gnutt@nuttx.org>
+//
+// 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/config.h>
+
+#include <cstdlib>
+#include <cassert>
+
+#include "libxx_internal.hxx"
+
+//***************************************************************************
+// Pre-processor Definitions
+//***************************************************************************
+
+//***************************************************************************
+// Private Types
+//***************************************************************************
+
+struct __cxa_atexit_s
+{
+  __cxa_exitfunc_t func;
+  FAR void *arg;
+};
+
+//***************************************************************************
+// Private Data
+//***************************************************************************
+
+extern "C"
+{
+  //*************************************************************************
+  // Public Data
+  //*************************************************************************
+
+  FAR void *__dso_handle = NULL;
+
+  //*************************************************************************
+  // Private Functions
+  //*************************************************************************
+
+  //*************************************************************************
+  // Name: __cxa_callback
+  //
+  // Description:
+  //   This is really just an "adaptor" function that matches the form of
+  //   the __cxa_exitfunc_t to an onexitfunc_t using an allocated structure
+  //   to marshall the call parameters.
+  //
+  //*************************************************************************
+
+#if CONFIG_SCHED_ONEXIT
+  static void __cxa_callback(int exitcode, FAR void *arg)
+  {
+    FAR struct __cxa_atexit_s *alloc = (FAR struct __cxa_atexit_s *)arg;
+    DEBUGASSERT(alloc && alloc->func);
+
+    alloc->func(alloc->arg);
+    free(alloc);
+  }
+#endif
+
+  //*************************************************************************
+  // Public Functions
+  //*************************************************************************
+
+  //*************************************************************************
+  // Name: __cxa_atexit
+  //
+  // Description:
+  //   __cxa_atexit() registers a destructor function to be called by exit().
+  //   On a call to exit(), the registered functions should be called with
+  //   the single argument 'arg'. Destructor functions shall always be
+  //   called in the reverse order to their registration (i.e. the most
+  //   recently registered function shall be called first),
+  //
+  //   If shared libraries were supported, the callbacks should be invoked
+  //   when the shared library is unloaded as well.
+  //
+  // Reference:
+  //   Linux base
+  //
+  //*************************************************************************
+
+  int __cxa_atexit(__cxa_exitfunc_t func, FAR void *arg, FAR void *dso_handle)
+    {
+#if CONFIG_SCHED_ONEXIT
+      // Allocate memory to hold the marshaled __cxa_exitfunc_t call
+      // information.
+
+      FAR struct __cxa_atexit_s *alloc =
+        (FAR struct __cxa_atexit_s *)malloc(sizeof(struct __cxa_atexit_s));
+
+      if (alloc)
+        {
+          // Register the function to be called when the task/thread exists.
+
+          alloc->func = func;
+          alloc->arg  = arg;
+
+          return on_exit(__cxa_callback, alloc);
+        }
+      else
+#endif
+        {
+          // What else can we do?
+
+          return 0;
+        }
+    }
+}