non-intrusive exception_ptr support for msvc 7.1 and 8.0 (for now) thanks Anthony Williams

[SVN r65159]

test/Jamfile.v2

@@ -7,7 +7,7 @@
 
 import testing ;
 
-project : requirements <exception-handling>on ;
+project : requirements <exception-handling>on <define>BOOST_ENABLE_NON_INTRUSIVE_EXCEPTION_PTR ;
 
 #to_string
 
@@ -36,7 +36,8 @@ run refcount_ptr_test.cpp ;
 run current_exception_cast_test.cpp ;
 run no_exceptions_test.cpp : : : <exception-handling>off ;
 run errinfos_test.cpp ;
-run exception_ptr_test.cpp /boost//thread : : : <threading>multi ;
+run exception_ptr_test.cpp /boost//thread /boost//exception : : : <threading>multi ;
+
 compile-fail exception_fail.cpp ;
 compile-fail throw_exception_fail.cpp ;
 compile-fail error_info_const_fail.cpp ;

test/exception_ptr_test.cpp

@@ -10,6 +10,7 @@
 #include <boost/function.hpp>
 #include <boost/bind.hpp>
 #include <boost/thread.hpp>
+#include <boost/detail/atomic_count.hpp>
 #include <boost/detail/lightweight_test.hpp>
 #include <iostream>
 
@@ -66,7 +67,33 @@ join( thread_handle & t )
         rethrow_exception(t.err_);
     }
 
-struct exc: boost::exception, std::exception { };
+boost::detail::atomic_count exc_count(0);
+
+struct
+exc:
+    virtual boost::exception,
+    virtual std::exception
+    {
+    exc()
+        {
+        ++exc_count;
+        }
+
+    exc( exc const & )
+        {
+        ++exc_count;
+        }
+
+    ~exc()
+        {
+        --exc_count;
+        }
+
+    private:
+
+    exc & operator=( exc const & );
+    };
+
 typedef boost::error_info<struct answer_,int> answer;
 
 void
@@ -93,6 +120,7 @@ check( boost::shared_ptr<thread_handle> const & t )
 int
 main()
     {
+    BOOST_TEST(++exc_count==1);
     try
         {
         std::vector< boost::shared_ptr<thread_handle> > threads;
@@ -109,4 +137,5 @@ main()
             boost::current_exception_diagnostic_information() << std::endl;
         return 42;
         }
+    BOOST_TEST(!--exc_count);
     }