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/*
* 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
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