1 files changed, 58 insertions, 0 deletions
diff --git a/ppapi/cpp/resource.h b/ppapi/cpp/resource.h
new file mode 100644
index 0000000..33e9982
--- /dev/null
+++ b/ppapi/cpp/resource.h
@@ -0,0 +1,58 @@
+// Copyright (c) 2010 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef PPAPI_CPP_RESOURCE_H_
+#define PPAPI_CPP_RESOURCE_H_
+
+#include "ppapi/c/pp_resource.h"
+
+namespace pp {
+
+// Base class for refcounted plugin resources.
+class Resource {
+ public:
+  Resource();
+  Resource(const Resource& other);
+
+  virtual ~Resource();
+
+  Resource& operator=(const Resource& other);
+  void swap(Resource& other);
+
+  // Returns true if the given resource is invalid or uninitialized.
+  bool is_null() const { return !pp_resource_; }
+
+  PP_Resource pp_resource() const { return pp_resource_; }
+
+  // Releases ownership of the PP_Resource and returns it to the caller.
+  // Note the the reference count on the resource is unchanged and the caller
+  // needs to release the resource.
+  PP_Resource detach();
+
+ protected:
+  // This constructor is used when we've gotten a PP_Resource as a return value
+  // that we need to addref.
+  explicit Resource(PP_Resource resource);
+
+  // Called by derived class' constructors to initialize this Resource with
+  // a PP_Resource that has already been AddRef'ed. It also assumes this object
+  // has no current resource.
+  //
+  // The intended usage is that the derived class constructor will call the
+  // default Resource constructor, then make a call to create a resource. It
+  // then wants to assign the new resource (which, since it was returned by the
+  // browser, is already AddRef'ed).
+  void PassRefFromConstructor(PP_Resource resource);
+
+ private:
+  PP_Resource pp_resource_;
+};
+
+}  // namespace pp
+
+inline bool operator==(const pp::Resource& lhs, const pp::Resource& rhs) {
+  return lhs.pp_resource() == rhs.pp_resource();
+}
+
+#endif // PPAPI_CPP_RESOURCE_H_