mirror of
https://github.com/kidfromjupiter/nearby.git
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139 lines
4.8 KiB
Objective-C
139 lines
4.8 KiB
Objective-C
// Copyright 2023 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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// Note: File language is detected using heuristics. Many Objective-C++ headers are incorrectly
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// classified as C++ resulting in invalid linter errors. The use of "NSArray" and other Foundation
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// classes like "NSData", "NSDictionary" and "NSUUID" are highly weighted for Objective-C and
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// Objective-C++ scores. Oddly, "#import <Foundation/Foundation.h>" does not contribute any points.
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// This comment alone should be enough to trick the IDE in to believing this is actually some sort
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// of Objective-C file. See: cs/google3/devtools/search/lang/recognize_language_classifiers_data
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// TODO(b/293336684): Remove this file when shared Weave is complete.
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#import <Foundation/Foundation.h>
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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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@protocol GNCMConnection;
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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 BleInputStream : public InputStream {
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public:
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BleInputStream();
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~BleInputStream() 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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GNCMConnectionHandlers *GetConnectionHandlers() { return connectionHandlers_; }
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private:
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GNCMConnectionHandlers *connectionHandlers_;
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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 BleOutputStream : public OutputStream {
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public:
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explicit BleOutputStream(id<GNCMConnection> connection)
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: connection_(connection), condition_([[NSCondition alloc] init]) {}
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~BleOutputStream() 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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id<GNCMConnection> connection_;
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NSCondition *condition_;
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};
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// A BLE Weave socket.
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class BleSocket : public api::ble_v2::BleSocket {
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public:
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explicit BleSocket(id<GNCMConnection> 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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BleSocket(id<GNCMConnection> connection, api::ble_v2::BlePeripheral::UniqueId peripheral_id);
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~BleSocket() override;
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// Returns the InputStream of the BleSocket.
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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 BleSocket object is destroyed.
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BleInputStream &GetInputStream() override { return *input_stream_; }
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// Returns the OutputStream of the BleSocket.
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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 BleSocket object is destroyed.
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BleOutputStream &GetOutputStream() override { return *output_stream_; }
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// Returns Exception::kIo on error, otherwise Exception::kSuccess.
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Exception Close() override ABSL_LOCKS_EXCLUDED(mutex_);
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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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// Sets a notifier that will be called when the socket is closed.
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void SetCloseNotifier(absl::AnyInvocable<void()> notifier) 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<BleInputStream> input_stream_;
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std::unique_ptr<BleOutputStream> output_stream_;
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api::ble_v2::BlePeripheral::UniqueId peripheral_id_;
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absl::AnyInvocable<void()> close_notifier_;
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};
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} // namespace apple
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} // namespace nearby
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