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authorLorry Tar Creator <lorry-tar-importer@lorry>2017-06-27 06:07:23 +0000
committerLorry Tar Creator <lorry-tar-importer@lorry>2017-06-27 06:07:23 +0000
commit1bf1084f2b10c3b47fd1a588d85d21ed0eb41d0c (patch)
tree46dcd36c86e7fbc6e5df36deb463b33e9967a6f7 /Source/JavaScriptCore/API/APIShims.h
parent32761a6cee1d0dee366b885b7b9c777e67885688 (diff)
downloadWebKitGtk-tarball-master.tar.gz
Diffstat (limited to 'Source/JavaScriptCore/API/APIShims.h')
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diff --git a/Source/JavaScriptCore/API/APIShims.h b/Source/JavaScriptCore/API/APIShims.h
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--- a/Source/JavaScriptCore/API/APIShims.h
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@@ -1,125 +0,0 @@
-/*
- * 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 {
-protected:
- APIEntryShimWithoutLock(VM* vm, bool registerThread)
- : m_vm(vm)
- , m_entryIdentifierTable(wtfThreadData().setCurrentIdentifierTable(vm->identifierTable))
- {
- if (registerThread)
- vm->heap.machineThreads().addCurrentThread();
- }
-
- ~APIEntryShimWithoutLock()
- {
- wtfThreadData().setCurrentIdentifierTable(m_entryIdentifierTable);
- }
-
-protected:
- RefPtr<VM> m_vm;
- IdentifierTable* m_entryIdentifierTable;
-};
-
-class APIEntryShim : public APIEntryShimWithoutLock {
-public:
- // Normal API entry
- APIEntryShim(ExecState* exec, bool registerThread = true)
- : APIEntryShimWithoutLock(&exec->vm(), registerThread)
- , m_lockHolder(exec->vm().exclusiveThread ? 0 : exec)
- {
- }
-
- // JSPropertyNameAccumulator only has a vm.
- APIEntryShim(VM* vm, bool registerThread = true)
- : APIEntryShimWithoutLock(vm, registerThread)
- , m_lockHolder(vm->exclusiveThread ? 0 : vm)
- {
- }
-
- ~APIEntryShim()
- {
- // Destroying our JSLockHolder should also destroy the VM.
- m_vm.clear();
- }
-
-private:
- JSLockHolder m_lockHolder;
-};
-
-class APICallbackShim {
-public:
- APICallbackShim(ExecState* exec)
- : m_dropAllLocks(shouldDropAllLocks(exec->vm()) ? exec : nullptr)
- , m_vm(&exec->vm())
- {
- wtfThreadData().resetCurrentIdentifierTable();
- }
-
- APICallbackShim(VM& vm)
- : m_dropAllLocks(shouldDropAllLocks(vm) ? &vm : nullptr)
- , m_vm(&vm)
- {
- wtfThreadData().resetCurrentIdentifierTable();
- }
-
- ~APICallbackShim()
- {
- wtfThreadData().setCurrentIdentifierTable(m_vm->identifierTable);
- }
-
-private:
- static bool shouldDropAllLocks(VM& vm)
- {
- if (vm.exclusiveThread)
- return false;
-
- // If the VM is in the middle of being destroyed then we don't want to resurrect it
- // by allowing DropAllLocks to ref it. By this point the APILock has already been
- // released anyways, so it doesn't matter that DropAllLocks is a no-op.
- if (!vm.refCount())
- return false;
-
- return true;
- }
-
- JSLock::DropAllLocks m_dropAllLocks;
- VM* m_vm;
-};
-
-}
-
-#endif