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