| /* |
| * Copyright (C) 2009 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 COMPUTER, INC. ``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 COMPUTER, INC. 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 APIShims_h |
| #define APIShims_h |
| |
| #include "CallFrame.h" |
| #include "GCActivityCallback.h" |
| #include "IncrementalSweeper.h" |
| #include "JSLock.h" |
| #include <wtf/WTFThreadData.h> |
| |
| namespace JSC { |
| |
| class APIEntryShimWithoutLock { |
| public: |
| enum RefGlobalDataTag { DontRefGlobalData = 0, RefGlobalData }; |
| |
| protected: |
| APIEntryShimWithoutLock(JSGlobalData* globalData, bool registerThread, RefGlobalDataTag shouldRefGlobalData) |
| : m_shouldRefGlobalData(shouldRefGlobalData) |
| , m_globalData(globalData) |
| , m_entryIdentifierTable(wtfThreadData().setCurrentIdentifierTable(globalData->identifierTable)) |
| { |
| if (shouldRefGlobalData) |
| m_globalData->ref(); |
| UNUSED_PARAM(registerThread); |
| if (registerThread) |
| globalData->heap.machineThreads().addCurrentThread(); |
| m_globalData->heap.activityCallback()->synchronize(); |
| m_globalData->heap.sweeper()->synchronize(); |
| } |
| |
| ~APIEntryShimWithoutLock() |
| { |
| wtfThreadData().setCurrentIdentifierTable(m_entryIdentifierTable); |
| if (m_shouldRefGlobalData) |
| m_globalData->deref(); |
| } |
| |
| protected: |
| RefGlobalDataTag m_shouldRefGlobalData; |
| JSGlobalData* m_globalData; |
| IdentifierTable* m_entryIdentifierTable; |
| }; |
| |
| class APIEntryShim : public APIEntryShimWithoutLock { |
| public: |
| // Normal API entry |
| APIEntryShim(ExecState* exec, bool registerThread = true) |
| : APIEntryShimWithoutLock(&exec->globalData(), registerThread, RefGlobalData) |
| { |
| init(); |
| } |
| |
| // This constructor is necessary for HeapTimer to prevent it from accidentally resurrecting |
| // the ref count of a "dead" JSGlobalData. |
| APIEntryShim(JSGlobalData* globalData, RefGlobalDataTag refGlobalData, bool registerThread = true) |
| : APIEntryShimWithoutLock(globalData, registerThread, refGlobalData) |
| { |
| init(); |
| } |
| |
| // JSPropertyNameAccumulator only has a globalData. |
| APIEntryShim(JSGlobalData* globalData, bool registerThread = true) |
| : APIEntryShimWithoutLock(globalData, registerThread, RefGlobalData) |
| { |
| init(); |
| } |
| |
| ~APIEntryShim() |
| { |
| m_globalData->timeoutChecker.stop(); |
| m_globalData->apiLock().unlock(); |
| } |
| |
| private: |
| void init() |
| { |
| m_globalData->apiLock().lock(); |
| m_globalData->timeoutChecker.start(); |
| } |
| }; |
| |
| class APICallbackShim { |
| public: |
| APICallbackShim(ExecState* exec) |
| : m_dropAllLocks(exec) |
| , m_globalData(&exec->globalData()) |
| { |
| wtfThreadData().resetCurrentIdentifierTable(); |
| } |
| |
| ~APICallbackShim() |
| { |
| wtfThreadData().setCurrentIdentifierTable(m_globalData->identifierTable); |
| } |
| |
| private: |
| JSLock::DropAllLocks m_dropAllLocks; |
| JSGlobalData* m_globalData; |
| }; |
| |
| } |
| |
| #endif |