Move V8 to external/v8
Change-Id: If68025d67453785a651c5dfb34fad298c16676a4
diff --git a/src/smart-pointer.h b/src/smart-pointer.h
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--- /dev/null
+++ b/src/smart-pointer.h
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+// Copyright 2008 the V8 project authors. 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.
+
+#ifndef V8_SMART_POINTER_H_
+#define V8_SMART_POINTER_H_
+
+namespace v8 {
+namespace internal {
+
+
+// A 'scoped array pointer' that calls DeleteArray on its pointer when the
+// destructor is called.
+template<typename T>
+class SmartPointer {
+ public:
+
+ // Default constructor. Construct an empty scoped pointer.
+ inline SmartPointer() : p(NULL) {}
+
+
+ // Construct a scoped pointer from a plain one.
+ explicit inline SmartPointer(T* pointer) : p(pointer) {}
+
+
+ // Copy constructor removes the pointer from the original to avoid double
+ // freeing.
+ inline SmartPointer(const SmartPointer<T>& rhs) : p(rhs.p) {
+ const_cast<SmartPointer<T>&>(rhs).p = NULL;
+ }
+
+
+ // When the destructor of the scoped pointer is executed the plain pointer
+ // is deleted using DeleteArray. This implies that you must allocate with
+ // NewArray.
+ inline ~SmartPointer() { if (p) DeleteArray(p); }
+
+
+ // You can get the underlying pointer out with the * operator.
+ inline T* operator*() { return p; }
+
+
+ // You can use [n] to index as if it was a plain pointer
+ inline T& operator[](size_t i) {
+ return p[i];
+ }
+
+ // We don't have implicit conversion to a T* since that hinders migration:
+ // You would not be able to change a method from returning a T* to
+ // returning an SmartPointer<T> and then get errors wherever it is used.
+
+
+ // If you want to take out the plain pointer and don't want it automatically
+ // deleted then call Detach(). Afterwards, the smart pointer is empty
+ // (NULL).
+ inline T* Detach() {
+ T* temp = p;
+ p = NULL;
+ return temp;
+ }
+
+
+ // Assignment requires an empty (NULL) SmartPointer as the receiver. Like
+ // the copy constructor it removes the pointer in the original to avoid
+ // double freeing.
+ inline SmartPointer& operator=(const SmartPointer<T>& rhs) {
+ ASSERT(is_empty());
+ T* tmp = rhs.p; // swap to handle self-assignment
+ const_cast<SmartPointer<T>&>(rhs).p = NULL;
+ p = tmp;
+ return *this;
+ }
+
+
+ inline bool is_empty() {
+ return p == NULL;
+ }
+
+
+ private:
+ T* p;
+};
+
+} } // namespace v8::internal
+
+#endif // V8_SMART_POINTER_H_