Added a little crude leak-checking code

[SVN r8228]

extclass.cpp

@@ -8,17 +8,24 @@
 
 #include "extclass.h"
 #include <cstring>
+#include <boost/utility.hpp>
 
 namespace py {
 namespace detail {
 
   struct operator_dispatcher
       : public PyObject
+#ifndef NDEBUG
+        , boost::noncopyable
+#endif
   {
       static PyTypeObject type_object;
       static PyNumberMethods number_methods;
 
       operator_dispatcher(const Ptr& o, const Ptr& s);
+#ifndef NDEBUG
+      ~operator_dispatcher();
+#endif
       static void dealloc(PyObject* self);
       static int coerce(PyObject** l, PyObject** r);
       static PyObject* call_add(PyObject*, PyObject*);
@@ -507,11 +514,19 @@ PyNumberMethods operator_dispatcher::number_methods =
     0 
 }; 
 
+#ifndef NDEBUG
+int total_Dispatchers = 0;
+operator_dispatcher::~operator_dispatcher() { --total_Dispatchers; }
+#endif
+
 operator_dispatcher::operator_dispatcher(const Ptr& o, const Ptr& s)
     : m_object(o), m_self(s)
 {
     ob_refcnt = 1;
     ob_type = &type_object;
+#ifndef NDEBUG
+    ++total_Dispatchers;
+#endif
 }
 
 void operator_dispatcher::dealloc(PyObject* self) 

extclass_demo.cpp

@@ -641,9 +641,22 @@ struct Fubar {
 /*                                                          */
 /************************************************************/
 
+#ifndef NDEBUG
+int total_Ints = 0;
+#endif
+
 struct Int
 {
-    explicit Int(int i) : i_(i) { }
+    explicit Int(int i) : i_(i) {
+#ifndef NDEBUG
+        ++total_Ints;
+#endif
+    }
+    
+#ifndef NDEBUG
+    ~Int() { --total_Ints; }
+    Int(const Int& rhs) : i_(rhs.i_) { ++total_Ints; }
+#endif
     
     int i() const { return i_; }
     
@@ -1032,6 +1045,10 @@ extern "C" void structured_exception_translator(unsigned int, EXCEPTION_POINTERS
 }
 # endif
 
+#ifndef NDEBUG
+namespace py { namespace detail { extern int total_Dispatchers; }}
+#endif
+
 BOOL WINAPI DllMain(
     HINSTANCE,  //hDllInst
     DWORD fdwReason,
@@ -1041,7 +1058,17 @@ BOOL WINAPI DllMain(
 # ifdef PY_COMPILER_IS_MSVC
     _set_se_translator(structured_exception_translator);
 #endif
-    return 1;
     (void)fdwReason; // warning suppression.
+
+#ifndef NDEBUG
+    switch(fdwReason)
+    {
+    case DLL_PROCESS_DETACH:
+        assert(extclass_demo::total_Ints == 0);
+        assert(py::detail::total_Dispatchers == 0);
+    }
+#endif
+    
+    return 1;
 }
 #endif // _WIN32