| /* |
| * Copyright (C) 2010 Apple 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: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. 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. |
| * |
| * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS 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 APPLE INC. OR ITS 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 LocalScope_h |
| #define LocalScope_h |
| |
| #include "HandleStack.h" |
| #include "Local.h" |
| |
| namespace JSC { |
| /* |
| A LocalScope is a temporary scope in which Locals are allocated. When a |
| LocalScope goes out of scope, all the Locals created in it are destroyed. |
| |
| LocalScope is similar in concept to NSAutoreleasePool. |
| */ |
| |
| class JSGlobalData; |
| |
| class LocalScope { |
| public: |
| explicit LocalScope(JSGlobalData&); |
| ~LocalScope(); |
| |
| template <typename T> Local<T> release(Local<T>); // Destroys all other locals in the scope. |
| |
| private: |
| HandleStack* m_handleStack; |
| HandleStack::Frame m_lastFrame; |
| }; |
| |
| inline LocalScope::LocalScope(JSGlobalData& globalData) |
| : m_handleStack(globalData.heap.handleStack()) |
| { |
| m_handleStack->enterScope(m_lastFrame); |
| } |
| |
| inline LocalScope::~LocalScope() |
| { |
| m_handleStack->leaveScope(m_lastFrame); |
| } |
| |
| template <typename T> Local<T> LocalScope::release(Local<T> local) |
| { |
| typename Local<T>::ExternalType ptr = local.get(); |
| |
| m_handleStack->leaveScope(m_lastFrame); |
| HandleSlot slot = m_handleStack->push(); |
| m_handleStack->enterScope(m_lastFrame); |
| |
| return Local<T>(slot, ptr); |
| } |
| |
| } |
| |
| #endif |