Add chrome to the repository.

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@15 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 94 insertions, 0 deletions

diff --git a/chrome/common/classfactory.h b/chrome/common/classfactory.h
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+// Copyright 2008, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//    * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//    * 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.
+//    * Neither the name of Google Inc. 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.
+
+// ClassFactory<class>
+// is a simple class factory object for the parameterized class.
+//
+#ifndef _CLASSFACTORY_H_
+#define _CLASSFACTORY_H_
+
+#include <unknwn.h>
+
+// GenericClassFactory
+// provides the basic COM plumbing to implement IClassFactory, and
+// maintains a static count on the number of these objects in existence.
+// It remains for subclasses to implement CreateInstance.
+class GenericClassFactory : public IClassFactory {
+public:
+  GenericClassFactory();
+  ~GenericClassFactory();
+
+  //IUnknown methods
+  STDMETHOD(QueryInterface)(REFIID iid, LPVOID* ppvObject);
+  STDMETHOD_(ULONG, AddRef)();
+  STDMETHOD_(ULONG, Release)();
+
+  //IClassFactory methods
+  STDMETHOD(CreateInstance)(LPUNKNOWN pUnkOuter, REFIID riid, LPVOID* ppvObject) = 0;
+  STDMETHOD(LockServer)(BOOL fLock);
+
+  // generally handy for DllUnloadNow -- count of existing descendant objects
+  static LONG GetObjectCount() { return object_count_; }
+
+protected:
+  LONG reference_count_; // mind the reference counting for this object
+  static LONG object_count_; // count of all these objects
+};
+
+
+// OneClassFactory<T>
+// Knows how to be a factory for T's
+template <class T>
+class OneClassFactory : public GenericClassFactory
+{
+public:
+  //IClassFactory methods
+  STDMETHOD(CreateInstance)(LPUNKNOWN pUnkOuter, REFIID riid, void** ppvObject);
+};
+
+
+template <class T>
+STDMETHODIMP OneClassFactory<T>::CreateInstance(LPUNKNOWN pUnkOuter, REFIID riid, void** result) {
+  *result = NULL;
+
+  if(pUnkOuter != NULL)
+    return CLASS_E_NOAGGREGATION;
+
+  T* const obj = new T();
+  if(!obj)
+    return E_OUTOFMEMORY;
+
+  obj->AddRef();
+  HRESULT const hr = obj->QueryInterface(riid, result);
+  obj->Release();
+
+  return hr;
+}
+
+#endif