mirror of
https://github.com/kidfromjupiter/nearby.git
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74 lines
2.5 KiB
C++
74 lines
2.5 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 PLATFORM_BASE_FEATURE_FLAGS_H_
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#define PLATFORM_BASE_FEATURE_FLAGS_H_
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#include "absl/synchronization/mutex.h"
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namespace location {
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namespace nearby {
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// Global flags that control feature availability. This may be used to gating
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// features in development, QA testing and releasing.
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class FeatureFlags {
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public:
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// Holds for all the feature flags.
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struct Flags {
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bool enable_cancellation_flag = false;
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bool resume_before_disconnect = true;
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// Disable ServiceController API (using StoppableServiceController) when
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// ServiceController is released to prevent calls to that API from
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// other threads.
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bool disable_released_service_controller = true;
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// Ignore subsequent BWU Available events when we're still processing the
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// first one.
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bool disallow_out_of_order_bwu_avail_event = true;
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bool enable_async_bandwidth_upgrade = true;
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// Let endpoint_manager erase deleted endpoint from endpoints_ inside
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// function RemoveEndpoint.
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bool endpoint_manager_ensure_workers_terminated_inside_remove = true;
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// If a scheduled runnable is already running, Cancel() will synchronously
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// wait for the task to complete.
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bool cancel_waits_for_running_tasks = true;
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};
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static const FeatureFlags& GetInstance() {
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static const FeatureFlags* instance = new FeatureFlags();
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return *instance;
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}
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const Flags& GetFlags() const ABSL_LOCKS_EXCLUDED(mutex_) {
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absl::ReaderMutexLock lock(&mutex_);
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return flags_;
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}
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private:
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FeatureFlags() = default;
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// MediumEnvironment is testing uitl class. Use friend class here to enable
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// SetFlags for feature controlling need in test environment.
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friend class MediumEnvironment;
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void SetFlags(const Flags& flags) ABSL_LOCKS_EXCLUDED(mutex_) {
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absl::MutexLock lock(&mutex_);
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flags_ = flags;
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}
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Flags flags_ ABSL_GUARDED_BY(mutex_);
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mutable absl::Mutex mutex_;
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};
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} // namespace nearby
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} // namespace location
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#endif // PLATFORM_BASE_FEATURE_FLAGS_H_
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