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// Copyright 2017 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef THIRD_PARTY_BLINK_RENDERER_MODULES_LOCKS_LOCK_H_
#define THIRD_PARTY_BLINK_RENDERER_MODULES_LOCKS_LOCK_H_
#include "third_party/blink/public/mojom/feature_observer/feature_observer.mojom-blink.h"
#include "third_party/blink/public/mojom/locks/lock_manager.mojom-blink.h"
#include "third_party/blink/renderer/bindings/core/v8/script_promise.h"
#include "third_party/blink/renderer/bindings/core/v8/script_promise_resolver.h"
#include "third_party/blink/renderer/bindings/modules/v8/v8_lock_mode.h"
#include "third_party/blink/renderer/core/execution_context/execution_context_lifecycle_observer.h"
#include "third_party/blink/renderer/platform/bindings/script_wrappable.h"
#include "third_party/blink/renderer/platform/heap/garbage_collected.h"
#include "third_party/blink/renderer/platform/mojo/heap_mojo_associated_remote.h"
#include "third_party/blink/renderer/platform/mojo/heap_mojo_remote.h"
#include "third_party/blink/renderer/platform/wtf/text/wtf_string.h"
#include "third_party/blink/renderer/platform/wtf/vector.h"
namespace blink {
class LockManager;
class ScriptState;
class Lock final : public ScriptWrappable,
public ExecutionContextLifecycleObserver {
DEFINE_WRAPPERTYPEINFO();
public:
Lock(ScriptState*,
const String& name,
mojom::blink::LockMode,
mojo::PendingAssociatedRemote<mojom::blink::LockHandle>,
mojo::PendingRemote<mojom::blink::ObservedFeature>,
LockManager*);
~Lock() override;
void Trace(Visitor*) const override;
// Lock.idl
String name() const { return name_; }
V8LockMode mode() const;
// ExecutionContextLifecycleObserver
void ContextDestroyed() override;
// The lock is held until the passed promise resolves. When it is released,
// the passed resolver is invoked with the promise's result.
void HoldUntil(ScriptPromise<IDLAny>, ScriptPromiseResolver<IDLAny>*);
static mojom::blink::LockMode EnumToMode(V8LockMode::Enum);
static V8LockMode::Enum ModeToEnum(mojom::blink::LockMode);
private:
class ThenFunction;
void ReleaseIfHeld();
void OnConnectionError();
Member<ScriptPromiseResolver<IDLAny>> resolver_;
const String name_;
const mojom::blink::LockMode mode_;
// An opaque handle; this one end of a mojo pipe. When this is closed,
// the lock is released by the back end.
HeapMojoAssociatedRemote<mojom::blink::LockHandle> handle_;
HeapMojoRemote<mojom::blink::ObservedFeature> lock_lifetime_;
// LockManager::OnLockReleased() is called when this lock is released, to
// stop artificially keeping this instance alive. It is necessary in the
// case where the resolver's promise could potentially be GC'd.
Member<LockManager> manager_;
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_MODULES_LOCKS_LOCK_H_
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