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/*
* Copyright (C) 2013 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.
*/
#include "config.h"
#include "JSDOMGlobalObjectTask.h"
#include "ActiveDOMCallback.h"
#include "JSMainThreadExecState.h"
#include <heap/StrongInlines.h>
#include <runtime/Microtask.h>
#include <wtf/Ref.h>
using namespace JSC;
namespace WebCore {
class JSGlobalObjectCallback final : public RefCounted<JSGlobalObjectCallback>, private ActiveDOMCallback {
public:
static Ref<JSGlobalObjectCallback> create(JSDOMGlobalObject* globalObject, PassRefPtr<Microtask> task)
{
return adoptRef(*new JSGlobalObjectCallback(globalObject, task));
}
void call()
{
if (!canInvokeCallback())
return;
Ref<JSGlobalObjectCallback> protect(*this);
JSLockHolder lock(m_globalObject->vm());
ExecState* exec = m_globalObject->globalExec();
ScriptExecutionContext* context = m_globalObject->scriptExecutionContext();
// We will fail to get the context if the frame has been detached.
if (!context)
return;
// When on the main thread (e.g. the document's thread), we need to make sure to
// push the current ExecState on to the JSMainThreadExecState stack.
if (context->isDocument())
JSMainThreadExecState::runTask(exec, *m_task.get());
else
m_task->run(exec);
ASSERT(!exec->hadException());
}
private:
JSGlobalObjectCallback(JSDOMGlobalObject* globalObject, PassRefPtr<Microtask> task)
: ActiveDOMCallback(globalObject->scriptExecutionContext())
, m_globalObject(globalObject->vm(), globalObject)
, m_task(task)
{
}
Strong<JSDOMGlobalObject> m_globalObject;
RefPtr<Microtask> m_task;
};
JSGlobalObjectTask::JSGlobalObjectTask(JSDOMGlobalObject* globalObject, PassRefPtr<Microtask> task)
: ScriptExecutionContext::Task(nullptr)
{
RefPtr<JSGlobalObjectCallback> callback = JSGlobalObjectCallback::create(globalObject, task);
m_task = [callback] (ScriptExecutionContext&) {
callback->call();
};
}
} // namespace WebCore
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