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// Copyright 2020 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_DIRECT_SOCKETS_TCP_WRITABLE_STREAM_WRAPPER_H_
#define THIRD_PARTY_BLINK_RENDERER_MODULES_DIRECT_SOCKETS_TCP_WRITABLE_STREAM_WRAPPER_H_
#include "base/notreached.h"
#include "mojo/public/cpp/system/data_pipe.h"
#include "mojo/public/cpp/system/simple_watcher.h"
#include "partition_alloc/partition_root.h"
#include "third_party/blink/renderer/bindings/core/v8/active_script_wrappable.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/core/v8/v8_typedefs.h"
#include "third_party/blink/renderer/core/dom/dom_exception.h"
#include "third_party/blink/renderer/core/execution_context/execution_context_lifecycle_observer.h"
#include "third_party/blink/renderer/modules/direct_sockets/stream_wrapper.h"
#include "third_party/blink/renderer/modules/modules_export.h"
#include "third_party/blink/renderer/platform/bindings/exception_code.h"
#include "third_party/blink/renderer/platform/heap/prefinalizer.h"
namespace v8 {
class Isolate;
}
namespace blink {
// Helper class to write to a mojo producer handle
class MODULES_EXPORT TCPWritableStreamWrapper
: public GarbageCollected<TCPWritableStreamWrapper>,
public WritableStreamWrapper {
USING_PRE_FINALIZER(TCPWritableStreamWrapper, Dispose);
public:
TCPWritableStreamWrapper(ScriptState*,
CloseOnceCallback,
mojo::ScopedDataPipeProducerHandle,
uint64_t inspector_id);
// WritableStreamWrapper:
void CloseStream() override;
void ErrorStream(int32_t error_code) override;
bool HasPendingWrite() const override;
void Trace(Visitor*) const override;
void OnAbortSignal() override;
ScriptPromise<IDLUndefined> Write(ScriptValue chunk,
ExceptionState&) override;
private:
// Called when |data_pipe_| becomes writable or errored.
void OnHandleReady(MojoResult, const mojo::HandleSignalsState&);
// Called when |data_pipe_| is closed.
void OnHandleReset(MojoResult, const mojo::HandleSignalsState&);
// Writes data contained in |buffer_source_| to |data_pipe_|, possibly in
// several asynchronous attempts.
void WriteDataAsynchronously();
// Writes zero or more bytes of |data| synchronously to |data_pipe_|,
// returning the number of bytes that were written.
size_t WriteDataSynchronously(base::span<const uint8_t> data);
// Resolves |write_promise_resolver_| and resets |buffer_source_| if write
// operation finished successfully.
void FinalizeWrite();
// Errors |writable_|, resolves |writing_aborted_| and resets |data_pipe_|.
void ErrorStreamAbortAndReset(bool error);
// Resets |data_pipe_| and clears the watchers. Also discards |cached_data_|.
void ResetPipe();
// Prepares the object for destruction.
void Dispose();
CloseOnceCallback on_close_;
mojo::ScopedDataPipeProducerHandle data_pipe_;
// Only armed when we need to write something.
mojo::SimpleWatcher write_watcher_;
// Always armed to detect pipe close.
mojo::SimpleWatcher close_watcher_;
// Data which has been passed to write() but still needs to be written
// asynchronously.
Member<V8BufferSource> buffer_source_;
// The offset into |cached_data_| of the first byte that still needs to be
// written.
size_t offset_ = 0;
// If an asynchronous write() on the underlying sink object is pending, this
// will be non-null.
Member<ScriptPromiseResolver<IDLUndefined>> write_promise_resolver_;
// Unique id for devtools inspector_network_agent.
const uint64_t inspector_id_;
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_MODULES_DIRECT_SOCKETS_TCP_WRITABLE_STREAM_WRAPPER_H_
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