1 files changed, 129 insertions, 0 deletions
diff --git a/src/native/windows/msofficecomm/UnknownImpl.h b/src/native/windows/msofficecomm/UnknownImpl.h
new file mode 100644
index 0000000..dcd6607
--- /dev/null
+++ b/src/native/windows/msofficecomm/UnknownImpl.h
@@ -0,0 +1,129 @@
+/*
+ * Jitsi, the OpenSource Java VoIP and Instant Messaging client.
+ *
+ * Distributable under LGPL license.
+ * See terms of license at gnu.org.
+ */
+#ifndef _JMSOFFICECOMM_UNKNOWNIMPL_H_
+#define _JMSOFFICECOMM_UNKNOWNIMPL_H_
+
+#include "Log.h"
+#include "OutOfProcessServer.h"
+#include "StringUtils.h"
+#include "WeakReferenceSource.h"
+
+#define STDMETHODIMP_E_NOTIMPL_STUB \
+    { \
+        Log::d(_T("%s\n"), __PRETTY_FUNCTION__); \
+        return E_NOTIMPL; \
+    }
+
+/**
+ * Represents a base implementation of the <tt>IUnknown</tt> interface.
+ *
+ * @author Lyubomir Marinov
+ */
+template <class T, REFIID IID_T>
+class UnknownImpl
+    : public T
+{
+public:
+    // IUnknown
+    STDMETHODIMP QueryInterface(REFIID iid, PVOID *obj)
+        {
+            HRESULT hr;
+
+            if (!obj)
+                hr = E_POINTER;
+            else if (IID_IUnknown == iid)
+            {
+                AddRef();
+                *obj = static_cast<LPUNKNOWN>(this);
+                hr = S_OK;
+            }
+            else if (IID_T == iid)
+            {
+                AddRef();
+                *obj = static_cast<T *>(this);
+                hr = S_OK;
+            }
+            else if (IID_IWeakReferenceSource == iid)
+            {
+                if (!_weakReferenceSource)
+                    _weakReferenceSource = new WeakReferenceSource(this);
+                _weakReferenceSource->AddRef();
+                *obj = static_cast<IWeakReferenceSource *>(_weakReferenceSource);
+                hr = S_OK;
+            }
+            else
+            {
+                *obj = NULL;
+                hr = E_NOINTERFACE;
+            }
+
+            if (FAILED(hr))
+            {
+                LPOLESTR olestr;
+
+                if (SUCCEEDED(::StringFromIID(iid, &olestr)))
+                {
+                    LPTSTR tstr
+#ifdef _UNICODE
+                        = olestr;
+#else
+                        = StringUtils::WideCharToMultiByte(olestr);
+#endif /* #ifdef _UNICODE */
+
+                    if (tstr)
+                    {
+                        Log::d(
+                                _T("UnknownImpl::QueryInterface: this=%p; iid=%s;\n"),
+                                (PVOID) this,
+                                tstr);
+                        if (tstr != olestr)
+                            ::free(tstr);
+                    }
+                    ::CoTaskMemFree(olestr);
+                }
+            }
+
+            return hr;
+        }
+
+    STDMETHODIMP_(ULONG) AddRef() { return ++_refCount; }
+
+    STDMETHODIMP_(ULONG) Release()
+        {
+            ULONG refCount = --_refCount;
+
+            if (!refCount)
+                delete this;
+            Log::d(
+                    _T("UnknownImpl::Release: this=%p; refCount=%lu;\n"),
+                    (PVOID) this,
+                    refCount);
+            return refCount;
+        }
+
+protected:
+    UnknownImpl()
+            : _refCount(1),
+              _weakReferenceSource(NULL)
+        {
+            OutOfProcessServer::addRef();
+        }
+
+    virtual ~UnknownImpl()
+        {
+            if (_weakReferenceSource)
+                delete _weakReferenceSource;
+
+            OutOfProcessServer::release();
+        }
+
+private:
+    ULONG _refCount;
+    WeakReferenceSource *_weakReferenceSource;
+};
+
+#endif /* #ifndef _JMSOFFICECOMM_UNKNOWNIMPL_H_ */