Index: mojo/public/bindings/lib/shared_ptr.h |
diff --git a/mojo/public/bindings/lib/shared_ptr.h b/mojo/public/bindings/lib/shared_ptr.h |
new file mode 100644 |
index 0000000000000000000000000000000000000000..537b39e6cfc287d8edbfaf97e33433307c798518 |
--- /dev/null |
+++ b/mojo/public/bindings/lib/shared_ptr.h |
@@ -0,0 +1,63 @@ |
+// Copyright 2014 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 MOJO_PUBLIC_BINDINGS_LIB_SHARED_PTR_H_ |
+#define MOJO_PUBLIC_BINDINGS_LIB_SHARED_PTR_H_ |
+ |
+#include "mojo/public/bindings/lib/shared_data.h" |
+ |
+namespace mojo { |
+namespace internal { |
+ |
+// Used to manage a heap-allocated instance of P that can be shared via |
+// reference counting. When the last reference is dropped, the instance is |
+// deleted. |
+template <typename P> |
+class SharedPtr { |
+ public: |
+ SharedPtr() {} |
+ |
+ explicit SharedPtr(P* ptr) { |
+ impl_.mutable_value()->ptr = ptr; |
+ } |
+ |
+ // Default copy-constructor and assignment operator are OK. |
+ |
+ P* get() { |
+ return impl_.value().ptr; |
+ } |
+ const P* get() const { |
+ return impl_.value().ptr; |
+ } |
+ |
+ P* operator->() { return get(); } |
+ const P* operator->() const { return get(); } |
+ |
+ private: |
+ class Impl { |
+ public: |
+ ~Impl() { |
+ if (ptr) |
+ delete ptr; |
+ } |
+ |
+ Impl() : ptr(NULL) { |
+ } |
+ |
+ Impl(P* ptr) : ptr(ptr) { |
+ } |
+ |
+ P* ptr; |
+ |
+ private: |
+ MOJO_DISALLOW_COPY_AND_ASSIGN(Impl); |
+ }; |
+ |
+ SharedData<Impl> impl_; |
+}; |
+ |
+} // namespace mojo |
+} // namespace internal |
+ |
+#endif // MOJO_PUBLIC_BINDINGS_LIB_SHARED_PTR_H_ |