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+//  (C) Copyright Gennadiy Rozental 2001-2008.
+//  (C) Copyright Beman Dawes 2001.
+//  Distributed under the Boost Software License, Version 1.0.
+//  (See accompanying file LICENSE_1_0.txt or copy at 
+//  http://www.boost.org/LICENSE_1_0.txt)
+
+//  See http://www.boost.org/libs/test for the library home page.
+//
+//  File        : $RCSfile$
+//
+//  Version     : $Revision: 57992 $
+//
+//  Description : defines abstract monitor interfaces and implements execution exception
+//  The original Boost Test Library included an implementation detail function
+//  named catch_exceptions() which caught otherwise uncaught C++ exceptions.
+//  It was derived from an existing test framework by Beman Dawes.  The
+//  intent was to expand later to catch other detectable but platform dependent
+//  error events like Unix signals or Windows structured C exceptions.
+//
+//  Requests from early adopters of the Boost Test Library included
+//  configurable levels of error message detail, elimination of templates,
+//  separation of error reporting, and making the catch_exceptions() facilities
+//  available as a public interface.  Support for unit testing also stretched
+//  the function based design.  Implementation within the header became less
+//  attractive due to the need to include many huge system dependent headers,
+//  although still preferable in certain cases.
+//
+//  All those issues have been addressed by introducing the class-based
+//  design presented here.
+// ***************************************************************************
+
+#ifndef BOOST_TEST_EXECUTION_MONITOR_HPP_071894GER
+#define BOOST_TEST_EXECUTION_MONITOR_HPP_071894GER
+
+// Boost.Test
+#include <ndnboost/test/detail/global_typedef.hpp>
+#include <ndnboost/test/detail/fwd_decl.hpp>
+#include <ndnboost/test/utils/callback.hpp>
+#include <ndnboost/test/utils/class_properties.hpp>
+
+// Boost
+#include <ndnboost/scoped_ptr.hpp>
+#include <ndnboost/scoped_array.hpp>
+#include <ndnboost/type.hpp>
+#include <ndnboost/cstdlib.hpp>
+
+#include <ndnboost/test/detail/suppress_warnings.hpp>
+
+//____________________________________________________________________________//
+
+namespace ndnboost {
+
+namespace detail {
+
+// ************************************************************************** //
+// **************       detail::translate_exception_base       ************** //
+// ************************************************************************** //
+
+class BOOST_TEST_DECL translate_exception_base {
+public:
+    // Constructor
+    explicit    translate_exception_base( ndnboost::scoped_ptr<translate_exception_base>& next )
+    {
+        next.swap( m_next );
+    }
+
+    // Destructor
+    virtual     ~translate_exception_base() {}
+
+    virtual int operator()( unit_test::callback0<int> const& F ) = 0;
+
+protected:
+    // Data members
+    ndnboost::scoped_ptr<translate_exception_base> m_next;
+};
+
+} // namespace detail
+
+// ************************************************************************** //
+// **************              execution_exception             ************** //
+// ************************************************************************** //
+    
+//  design rationale: fear of being out (or nearly out) of memory.
+    
+class BOOST_TEST_DECL execution_exception {
+    typedef ndnboost::unit_test::const_string const_string;
+public:
+    enum error_code {
+        //  These values are sometimes used as program return codes.
+        //  The particular values have been chosen to avoid conflicts with
+        //  commonly used program return codes: values < 100 are often user
+        //  assigned, values > 255 are sometimes used to report system errors.
+        //  Gaps in values allow for orderly expansion.
+        
+        no_error               = 0,   // for completeness only; never returned
+        user_error             = 200, // user reported non-fatal error
+        cpp_exception_error    = 205, // see note (1) below
+        system_error           = 210, // see note (2) below
+        timeout_error          = 215, // only detectable on certain platforms
+        user_fatal_error       = 220, // user reported fatal error
+        system_fatal_error     = 225  // see note (2) below
+        
+        //  Note 1: Only uncaught C++ exceptions are treated as errors.
+        //  If the application catches a C++ exception, it will never reach
+        //  the execution_monitor.
+        
+        //  Note 2: These errors include Unix signals and Windows structured
+        //  exceptions.  They are often initiated by hardware traps.
+        //
+        //  The implementation decides what is a fatal_system_exception and what is
+        //  just a system_exception.  Fatal errors are so likely to have corrupted
+        //  machine state (like a stack overflow or addressing exception) that it
+        //  is unreasonable to continue execution.
+    };
+    
+    struct BOOST_TEST_DECL location {
+        explicit    location( char const* file_name = 0, size_t line_num = 0, char const* func = 0 );
+
+        const_string    m_file_name;
+        size_t          m_line_num;
+        const_string    m_function;
+    };
+
+    // Constructor
+    execution_exception( error_code ec_, const_string what_msg_, location const& location_ ); // max length 256 inc '\0'
+
+    // Access methods
+    error_code      code() const    { return m_error_code; }
+    const_string    what() const    { return m_what; }
+    location const& where() const   { return m_location; }
+
+private:
+    // Data members
+    error_code      m_error_code;
+    const_string    m_what;
+    location        m_location;
+}; // execution_exception
+
+// ************************************************************************** //
+// **************               execution_monitor              ************** //
+// ************************************************************************** //
+
+class BOOST_TEST_DECL execution_monitor {
+public:
+    // Constructor
+    execution_monitor()
+    : p_catch_system_errors( true )
+    , p_auto_start_dbg( false )
+    , p_timeout( 0 )
+    , p_use_alt_stack( true )
+    , p_detect_fp_exceptions( false )
+    {}
+
+    // Public properties
+    
+    //  The p_catch_system_errors parameter specifies whether the monitor should 
+    //  try to catch system errors/exceptions that would cause program to crash 
+    //  in regular case
+    unit_test::readwrite_property<bool> p_catch_system_errors; 
+    //  The p_auto_start_dbg parameter specifies whether the monitor should 
+    //  try to attach debugger in case of caught system error
+    unit_test::readwrite_property<bool> p_auto_start_dbg;
+    //  The p_timeout parameter specifies the seconds that elapse before
+    //  a timer_error occurs.  May be ignored on some platforms.
+    unit_test::readwrite_property<int>  p_timeout;
+    //  The p_use_alt_stack parameter specifies whether the monitor should
+    //  use alternative stack for the signal catching
+    unit_test::readwrite_property<bool> p_use_alt_stack;
+    //  The p_detect_fp_exceptions parameter specifies whether the monitor should
+    //  try to detect hardware floating point exceptions
+    unit_test::readwrite_property<bool> p_detect_fp_exceptions;
+
+    int         execute( unit_test::callback0<int> const& F ); 
+    //  Returns:  Value returned by function call F().
+    //
+    //  Effects:  Calls executes supplied function F inside a try/catch block which also may
+    //  include other unspecified platform dependent error detection code.
+    //
+    //  Throws: execution_exception on an uncaught C++ exception,
+    //  a hardware or software signal, trap, or other exception.
+    //
+    //  Note: execute() doesn't consider it an error for F to return a non-zero value.
+    
+    // register custom (user supplied) exception translator
+    template<typename Exception, typename ExceptionTranslator>
+    void        register_exception_translator( ExceptionTranslator const& tr, ndnboost::type<Exception>* = 0 );
+
+private:
+    // implementation helpers
+    int         catch_signals( unit_test::callback0<int> const& F );
+
+    // Data members
+    ndnboost::scoped_ptr<detail::translate_exception_base> m_custom_translators;
+    ndnboost::scoped_array<char>                           m_alt_stack;
+}; // execution_monitor
+
+namespace detail {
+
+// ************************************************************************** //
+// **************         detail::translate_exception          ************** //
+// ************************************************************************** //
+
+template<typename Exception, typename ExceptionTranslator>
+class translate_exception : public translate_exception_base
+{
+    typedef ndnboost::scoped_ptr<translate_exception_base> base_ptr;
+public:
+    explicit    translate_exception( ExceptionTranslator const& tr, base_ptr& next )
+    : translate_exception_base( next ), m_translator( tr ) {}
+
+    int operator()( unit_test::callback0<int> const& F )
+    {
+        try {
+            return m_next ? (*m_next)( F ) : F();
+        } catch( Exception const& e ) {
+            m_translator( e );
+            return ndnboost::exit_exception_failure;
+        }
+    }
+
+private:
+    // Data members
+    ExceptionTranslator m_translator;
+};
+
+} // namespace detail
+
+template<typename Exception, typename ExceptionTranslator>
+void
+execution_monitor::register_exception_translator( ExceptionTranslator const& tr, ndnboost::type<Exception>* )
+{
+    m_custom_translators.reset( 
+        new detail::translate_exception<Exception,ExceptionTranslator>( tr,m_custom_translators ) );
+}
+
+// ************************************************************************** //
+// **************               execution_aborted              ************** //
+// ************************************************************************** //
+
+struct execution_aborted {};
+
+// ************************************************************************** //
+// **************                  system_error                ************** //
+// ************************************************************************** //
+
+class system_error {
+public:
+    // Constructor
+    explicit    system_error( char const* exp );
+
+    unit_test::readonly_property<long>          p_errno; 
+    unit_test::readonly_property<char const*>   p_failed_exp; 
+};
+
+#define BOOST_TEST_SYS_ASSERT( exp ) if( (exp) ) ; else throw ::ndnboost::system_error( BOOST_STRINGIZE( exp ) )
+
+}  // namespace ndnboost
+
+//____________________________________________________________________________//
+
+#include <ndnboost/test/detail/enable_warnings.hpp>
+
+#endif