mirror of
https://github.com/flutter/flutter.git
synced 2026-02-20 02:29:02 +08:00
109 lines
4.7 KiB
C++
109 lines
4.7 KiB
C++
// Copyright 2015 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.
|
|
|
|
#ifndef MOJO_EDK_SYSTEM_REMOTE_CONSUMER_DATA_PIPE_IMPL_H_
|
|
#define MOJO_EDK_SYSTEM_REMOTE_CONSUMER_DATA_PIPE_IMPL_H_
|
|
|
|
#include "base/memory/aligned_memory.h"
|
|
#include "base/memory/ref_counted.h"
|
|
#include "base/memory/scoped_ptr.h"
|
|
#include "mojo/edk/system/channel_endpoint.h"
|
|
#include "mojo/edk/system/data_pipe_impl.h"
|
|
#include "mojo/edk/system/system_impl_export.h"
|
|
#include "mojo/public/cpp/system/macros.h"
|
|
|
|
namespace mojo {
|
|
namespace system {
|
|
|
|
// |RemoteConsumerDataPipeImpl| is a subclass that "implements" |DataPipe| for
|
|
// data pipes whose producer is local and whose consumer is remote. See
|
|
// |DataPipeImpl| for more details.
|
|
class MOJO_SYSTEM_IMPL_EXPORT RemoteConsumerDataPipeImpl final
|
|
: public DataPipeImpl {
|
|
public:
|
|
RemoteConsumerDataPipeImpl(ChannelEndpoint* channel_endpoint,
|
|
size_t consumer_num_bytes);
|
|
~RemoteConsumerDataPipeImpl() override;
|
|
|
|
// Processes messages that were received and queued by an |IncomingEndpoint|.
|
|
// |*consumer_num_bytes| should be set to the value from the
|
|
// |SerializedDataPipeProducerDispatcher|. On success, returns true and
|
|
// updates |*consumer_num_bytes|. On failure, returns false (it may or may not
|
|
// modify |*consumer_num_bytes|). Always clears |*messages|.
|
|
static bool ProcessMessagesFromIncomingEndpoint(
|
|
const MojoCreateDataPipeOptions& validated_options,
|
|
size_t* consumer_num_bytes,
|
|
MessageInTransitQueue* messages);
|
|
|
|
private:
|
|
// |DataPipeImpl| implementation:
|
|
// Note: None of the |Consumer...()| methods should be called, except
|
|
// |ConsumerGetHandleSignalsState()|.
|
|
void ProducerClose() override;
|
|
MojoResult ProducerWriteData(UserPointer<const void> elements,
|
|
UserPointer<uint32_t> num_bytes,
|
|
uint32_t max_num_bytes_to_write,
|
|
uint32_t min_num_bytes_to_write) override;
|
|
MojoResult ProducerBeginWriteData(UserPointer<void*> buffer,
|
|
UserPointer<uint32_t> buffer_num_bytes,
|
|
uint32_t min_num_bytes_to_write) override;
|
|
MojoResult ProducerEndWriteData(uint32_t num_bytes_written) override;
|
|
HandleSignalsState ProducerGetHandleSignalsState() const override;
|
|
void ProducerStartSerialize(Channel* channel,
|
|
size_t* max_size,
|
|
size_t* max_platform_handles) override;
|
|
bool ProducerEndSerialize(
|
|
Channel* channel,
|
|
void* destination,
|
|
size_t* actual_size,
|
|
embedder::PlatformHandleVector* platform_handles) override;
|
|
void ConsumerClose() override;
|
|
MojoResult ConsumerReadData(UserPointer<void> elements,
|
|
UserPointer<uint32_t> num_bytes,
|
|
uint32_t max_num_bytes_to_read,
|
|
uint32_t min_num_bytes_to_read,
|
|
bool peek) override;
|
|
MojoResult ConsumerDiscardData(UserPointer<uint32_t> num_bytes,
|
|
uint32_t max_num_bytes_to_discard,
|
|
uint32_t min_num_bytes_to_discard) override;
|
|
MojoResult ConsumerQueryData(UserPointer<uint32_t> num_bytes) override;
|
|
MojoResult ConsumerBeginReadData(UserPointer<const void*> buffer,
|
|
UserPointer<uint32_t> buffer_num_bytes,
|
|
uint32_t min_num_bytes_to_read) override;
|
|
MojoResult ConsumerEndReadData(uint32_t num_bytes_read) override;
|
|
HandleSignalsState ConsumerGetHandleSignalsState() const override;
|
|
void ConsumerStartSerialize(Channel* channel,
|
|
size_t* max_size,
|
|
size_t* max_platform_handles) override;
|
|
bool ConsumerEndSerialize(
|
|
Channel* channel,
|
|
void* destination,
|
|
size_t* actual_size,
|
|
embedder::PlatformHandleVector* platform_handles) override;
|
|
bool OnReadMessage(unsigned port, MessageInTransit* message) override;
|
|
void OnDetachFromChannel(unsigned port) override;
|
|
|
|
void EnsureBuffer();
|
|
void DestroyBuffer();
|
|
|
|
void Disconnect();
|
|
|
|
// Should be valid if and only if |consumer_open()| returns true.
|
|
scoped_refptr<ChannelEndpoint> channel_endpoint_;
|
|
|
|
// The number of bytes we've sent the consumer, but don't *know* have been
|
|
// consumed.
|
|
size_t consumer_num_bytes_;
|
|
|
|
// Used for two-phase writes.
|
|
scoped_ptr<char, base::AlignedFreeDeleter> buffer_;
|
|
|
|
MOJO_DISALLOW_COPY_AND_ASSIGN(RemoteConsumerDataPipeImpl);
|
|
};
|
|
|
|
} // namespace system
|
|
} // namespace mojo
|
|
|
|
#endif // MOJO_EDK_SYSTEM_REMOTE_CONSUMER_DATA_PIPE_IMPL_H_
|