mirror of
https://github.com/kidfromjupiter/nearby.git
synced 2026-09-14 14:46:12 -04:00
Alexey Polyudov
c3a89bb894
Signed-off-by: Alexey Polyudov <apolyudov@google.com> Change-Id: I8ca8ef4727e289f3c6ea62ad73008ad718096e5d
127 lines
4.1 KiB
C++
127 lines
4.1 KiB
C++
// Copyright 2020 Google LLC
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// https://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
#ifndef CORE_INTERNAL_BASE_ENDPOINT_CHANNEL_H_
|
|
#define CORE_INTERNAL_BASE_ENDPOINT_CHANNEL_H_
|
|
|
|
#include <cstdint>
|
|
|
|
#include "core/internal/endpoint_channel.h"
|
|
#include "platform/api/atomic_boolean.h"
|
|
#include "platform/api/atomic_reference.h"
|
|
#include "platform/api/condition_variable.h"
|
|
#include "platform/api/input_stream.h"
|
|
#include "platform/api/lock.h"
|
|
#include "platform/api/output_stream.h"
|
|
#include "platform/api/system_clock.h"
|
|
#include "platform/byte_array.h"
|
|
#include "platform/port/string.h"
|
|
#include "platform/ptr.h"
|
|
#include "proto/connections_enums.pb.h"
|
|
#include "securegcm/d2d_connection_context_v1.h"
|
|
|
|
namespace location {
|
|
namespace nearby {
|
|
namespace connections {
|
|
|
|
template <typename Platform>
|
|
class BaseEndpointChannel : public EndpointChannel {
|
|
public:
|
|
BaseEndpointChannel(const string& channel_name, Ptr<InputStream> reader,
|
|
Ptr<OutputStream> writer);
|
|
~BaseEndpointChannel() override;
|
|
|
|
ExceptionOr<ConstPtr<ByteArray> > read() override;
|
|
|
|
Exception::Value write(ConstPtr<ByteArray> data) override;
|
|
|
|
// Closes this EndpointChannel, without tracking the closure in analytics.
|
|
void close() override;
|
|
|
|
// Closes this EndpointChannel and records the closure with the given reason.
|
|
void close(proto::connections::DisconnectionReason reason) override;
|
|
|
|
// Returns a one-word type descriptor for the concrete EndpointChannel
|
|
// implementation that can be used in log messages; eg: BLUETOOTH, BLE,
|
|
// WIFI.
|
|
string getType() override;
|
|
|
|
// Returns the name of the EndpointChannel.
|
|
string getName() override;
|
|
|
|
// Enables encryption on the EndpointChannel.
|
|
void enableEncryption(
|
|
Ptr<securegcm::D2DConnectionContextV1> encryption_context) override;
|
|
|
|
// True if the EndpointChannel is currently pausing all writes.
|
|
bool isPaused() override;
|
|
|
|
// Pauses all writes on this EndpointChannel until resume() is called.
|
|
void pause() override;
|
|
|
|
// Resumes any writes on this EndpointChannel that were suspended when pause()
|
|
// was called.
|
|
void resume() override;
|
|
|
|
// Returns the timestamp (in elapsedRealtime) of the last read from this
|
|
// endpoint, or -1 if no reads have occurred.
|
|
std::int64_t getLastReadTimestamp() override;
|
|
|
|
protected:
|
|
virtual void closeImpl() = 0;
|
|
|
|
private:
|
|
// Used to sanity check that our frame sizes are reasonable.
|
|
static const std::int32_t kMaxAllowedReadBytes = 1048576; // 1MB
|
|
|
|
bool isEncryptionEnabled();
|
|
void unblockPausedWriter();
|
|
void blockUntilUnpaused();
|
|
|
|
volatile std::int64_t last_read_timestamp_;
|
|
|
|
const string channel_name_;
|
|
|
|
ScopedPtr<Ptr<SystemClock> > system_clock_;
|
|
|
|
// The reader and writer are synchronized independently since we can't have
|
|
// writes waiting on reads that might potentially block forever.
|
|
ScopedPtr<Ptr<Lock> > reader_lock_;
|
|
// Not owned by this class, see the note in the destructor for a special
|
|
// restriction on usage.
|
|
Ptr<InputStream> reader_;
|
|
|
|
ScopedPtr<Ptr<Lock> > writer_lock_;
|
|
// Not owned by this class, see the note in the destructor for a special
|
|
// restriction on usage.
|
|
Ptr<OutputStream> writer_;
|
|
|
|
// An encryptor/decryptor. May be null.
|
|
ScopedPtr<Ptr<AtomicReference<Ptr<securegcm::D2DConnectionContextV1> > > >
|
|
encryption_context_;
|
|
|
|
ScopedPtr<Ptr<Lock> > is_paused_lock_;
|
|
ScopedPtr<Ptr<ConditionVariable> > is_paused_condition_variable_;
|
|
// If true, writes should block until this has been set to false.
|
|
ScopedPtr<Ptr<AtomicBoolean> > is_paused_;
|
|
};
|
|
|
|
} // namespace connections
|
|
} // namespace nearby
|
|
} // namespace location
|
|
|
|
#include "core/internal/base_endpoint_channel.cc"
|
|
|
|
#endif // CORE_INTERNAL_BASE_ENDPOINT_CHANNEL_H_
|