mirror of
https://github.com/kidfromjupiter/nearby.git
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Alexey Polyudov
c3a89bb894
Signed-off-by: Alexey Polyudov <apolyudov@google.com> Change-Id: I8ca8ef4727e289f3c6ea62ad73008ad718096e5d
84 lines
2.7 KiB
C++
84 lines
2.7 KiB
C++
// Copyright 2020 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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#ifndef CORE_INTERNAL_MEDIUMS_BLUETOOTH_RADIO_H_
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#define CORE_INTERNAL_MEDIUMS_BLUETOOTH_RADIO_H_
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#include <cstdint>
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#include "platform/api/atomic_boolean.h"
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#include "platform/api/bluetooth_adapter.h"
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#include "platform/api/thread_utils.h"
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#include "platform/ptr.h"
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namespace location {
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namespace nearby {
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namespace connections {
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// Provides the operations that can be performed on the Bluetooth radio.
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template <typename Platform>
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class BluetoothRadio {
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public:
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BluetoothRadio();
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// Reverts the Bluetooth radio to its original state.
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~BluetoothRadio();
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// Enables Bluetooth.
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//
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// This must be called before attempting to invoke any other methods of
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// this class.
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//
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// Returns true if enabled successfully.
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bool enable();
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// Disables Bluetooth.
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//
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// Returns true if disabled successfully.
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bool disable();
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// Returns true if the Bluetooth radio is currently enabled.
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bool isEnabled();
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void toggle();
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private:
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static std::int64_t kPauseBetweenToggleDurationMillis;
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bool setBluetoothState(bool enable);
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bool isInDesiredState(bool should_be_enabled) const;
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// To be called in enable(), disable(), and toggle(). This will remember the
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// original state of the radio before any radio state has been modified.
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// Returns false if Bluetooth doesn't exist on the device and the state cannot
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// be obtained.
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bool saveOriginalState();
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// Null if the device does not support Bluetooth.
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ScopedPtr<Ptr<BluetoothAdapter>> bluetooth_adapter_;
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ScopedPtr<Ptr<ThreadUtils>> thread_utils_;
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// The Bluetooth radio's original state, before we modified it. True if
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// originally enabled, false if originally disabled, null if we never modified
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// the radio state. We restore the radio to its original state in the
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// destructor.
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//
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// This is a Ptr instead of a ScopedPtr because it's lazily initialized
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// (and ScopedPtr doesn't support re-assignment).
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Ptr<AtomicBoolean> originally_enabled_;
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};
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} // namespace connections
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} // namespace nearby
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} // namespace location
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#include "core/internal/mediums/bluetooth_radio.cc"
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#endif // CORE_INTERNAL_MEDIUMS_BLUETOOTH_RADIO_H_
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