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// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "config.h"
#include "bindings/core/v8/ScriptPromiseResolver.h"
#include "bindings/core/v8/V8RecursionScope.h"
namespace blink {
ScriptPromiseResolver::ScriptPromiseResolver(ScriptState* scriptState)
: ActiveDOMObject(scriptState->executionContext())
, m_state(Pending)
, m_scriptState(scriptState)
, m_mode(Default)
, m_timer(this, &ScriptPromiseResolver::onTimerFired)
, m_resolver(scriptState)
#if ENABLE(ASSERT)
, m_isPromiseCalled(false)
#endif
{
if (executionContext()->activeDOMObjectsAreStopped()) {
m_state = ResolvedOrRejected;
m_resolver.clear();
}
}
void ScriptPromiseResolver::suspend()
{
m_timer.stop();
}
void ScriptPromiseResolver::resume()
{
if (m_state == Resolving || m_state == Rejecting)
m_timer.startOneShot(0, FROM_HERE);
}
void ScriptPromiseResolver::stop()
{
m_timer.stop();
clear();
}
void ScriptPromiseResolver::keepAliveWhilePending()
{
if (m_state == ResolvedOrRejected || m_mode == KeepAliveWhilePending)
return;
// Keep |this| while the promise is Pending.
// deref() will be called in clear().
m_mode = KeepAliveWhilePending;
ref();
}
void ScriptPromiseResolver::onTimerFired(Timer<ScriptPromiseResolver>*)
{
ASSERT(m_state == Resolving || m_state == Rejecting);
ScriptState::Scope scope(m_scriptState.get());
resolveOrRejectImmediately();
}
void ScriptPromiseResolver::resolveOrRejectImmediately()
{
ASSERT(!executionContext()->activeDOMObjectsAreStopped());
ASSERT(!executionContext()->activeDOMObjectsAreSuspended());
{
if (m_state == Resolving) {
m_resolver.resolve(m_value.newLocal(m_scriptState->isolate()));
} else {
ASSERT(m_state == Rejecting);
m_resolver.reject(m_value.newLocal(m_scriptState->isolate()));
}
}
clear();
}
void ScriptPromiseResolver::clear()
{
if (m_state == ResolvedOrRejected)
return;
ResolutionState state = m_state;
m_state = ResolvedOrRejected;
m_resolver.clear();
m_value.clear();
if (m_mode == KeepAliveWhilePending) {
// |ref| was called in |keepAliveWhilePending|.
deref();
}
// |this| may be deleted here, but it is safe to check |state| because
// it doesn't depend on |this|. When |this| is deleted, |state| can't be
// |Resolving| nor |Rejecting| and hence |this->deref()| can't be executed.
if (state == Resolving || state == Rejecting) {
// |ref| was called in |resolveOrReject|.
deref();
}
}
void ScriptPromiseResolver::trace(Visitor* visitor)
{
ActiveDOMObject::trace(visitor);
}
} // namespace blink
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