mirror of
https://github.com/kidfromjupiter/nearby.git
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128 lines
4.2 KiB
Objective-C
128 lines
4.2 KiB
Objective-C
// Copyright 2025 Google LLC
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// https://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include <memory>
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#include "internal/platform/implementation/ble_v2.h"
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#import "internal/platform/implementation/apple/ble_peripheral.h"
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@class GNCMConnectionHandlers;
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@class GNCBLEL2CAPConnection;
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namespace nearby {
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namespace apple {
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/** A readable stream of bytes. */
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class BleL2capInputStream : public InputStream {
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public:
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explicit BleL2capInputStream(GNCBLEL2CAPConnection* connection);
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~BleL2capInputStream() override;
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// Reads at most `size` bytes from the input stream.
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//
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// Returns an empty byte array on end of file, or Exception::kIo on error.
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ExceptionOr<ByteArray> Read(std::int64_t size) override;
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// Closes the stream preventing further reads.
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//
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// Returns Exception::kIo on error, otherwise Exception::kSuccess.
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Exception Close() override;
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private:
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GNCMConnectionHandlers *connectionHandlers_;
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GNCBLEL2CAPConnection* connection_;
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NSMutableArray<NSData *> *newDataPackets_;
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NSMutableData *accumulatedData_;
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NSCondition *condition_;
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};
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/** A writable stream of bytes. */
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class BleL2capOutputStream : public OutputStream {
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public:
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explicit BleL2capOutputStream(GNCBLEL2CAPConnection* connection)
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: connection_(connection), condition_([[NSCondition alloc] init]) {}
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~BleL2capOutputStream() override;
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// Write the provided bytes to the output stream.
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//
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// Returns Exception::kIo on error, otherwise Exception::kSuccess.
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Exception Write(const ByteArray &data) override;
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// no-op
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//
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// Always returns Exception::kSuccess.
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Exception Flush() override;
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// Closes the stream preventing further writes.
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//
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// Returns Exception::kIo on error, otherwise Exception::kSuccess.
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Exception Close() override;
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private:
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GNCBLEL2CAPConnection* connection_;
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NSCondition *condition_;
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};
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/**
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* Concrete BleL2capSocket implementation.
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*/
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class BleL2capSocket : public api::ble_v2::BleL2capSocket {
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public:
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explicit BleL2capSocket(GNCBLEL2CAPConnection* connection);
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// The peripheral used to create the socket must outlive the socket or undefined behavior will
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// occur.
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BleL2capSocket(GNCBLEL2CAPConnection *connection,
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api::ble_v2::BlePeripheral::UniqueId peripheral_id);
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~BleL2capSocket() override;
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// Returns the InputStream of the BleL2capSocket.
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// On error, returned stream will report Exception::kIo on any operation.
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//
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// The returned object is not owned by the caller, and can be invalidated once
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// the BleL2capSocket object is destroyed.
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BleL2capInputStream &GetInputStream() override { return *input_stream_; }
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// Returns the OutputStream of the BleL2capSocket.
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// On error, returned stream will report Exception::kIo on any operation.
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//
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// The returned object is not owned by the caller, and can be invalidated once
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// the BleL2capSocket object is destroyed.
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BleL2capOutputStream &GetOutputStream() override { return *output_stream_; }
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// Returns Exception::kIo on error, Exception::kSuccess otherwise.
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Exception Close() override ABSL_LOCKS_EXCLUDED(mutex_);
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// Sets the close notifier by client side.
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void SetCloseNotifier(absl::AnyInvocable<void()> notifier) override {};
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// Returns valid BlePeripheral pointer if there is a connection, and
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// nullptr otherwise.
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api::ble_v2::BlePeripheral::UniqueId GetRemotePeripheralId() override { return peripheral_id_; }
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bool IsClosed() const ABSL_LOCKS_EXCLUDED(mutex_);
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private:
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void DoClose() ABSL_EXCLUSIVE_LOCKS_REQUIRED(mutex_);
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mutable absl::Mutex mutex_;
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bool closed_ ABSL_GUARDED_BY(mutex_) = false;
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std::unique_ptr<BleL2capInputStream> input_stream_;
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std::unique_ptr<BleL2capOutputStream> output_stream_;
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api::ble_v2::BlePeripheral::UniqueId peripheral_id_;
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};
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} // namespace apple
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} // namespace nearby
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