mirror of
https://github.com/kidfromjupiter/nearby.git
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51 lines
1.8 KiB
C++
51 lines
1.8 KiB
C++
// Copyright 2022 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 THIRD_PARTY_NEARBY_INTERNAL_PLATFORM_DIRECT_EXECUTOR_H_
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#define THIRD_PARTY_NEARBY_INTERNAL_PLATFORM_DIRECT_EXECUTOR_H_
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#include "absl/base/thread_annotations.h"
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#include "internal/platform/implementation/executor.h"
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#include "internal/platform/submittable_executor.h"
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namespace nearby {
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// An Executor that executes the tasks immediately on the thread calling
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// `Execute()`.
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//
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// DirectExecutor is suitable for running fast, trivial runnables.
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class ABSL_LOCKABLE DirectExecutor final : public api::Executor {
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public:
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DirectExecutor(const DirectExecutor &) = delete;
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DirectExecutor &operator=(const DirectExecutor &) = delete;
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static DirectExecutor &GetInstance() {
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// DirectExecutor isn't technically trivially-destructible because it has a
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// virtual destructor, but the class is final, the destructor is default
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// (the base class is an interface) and there are no member fields.
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// NOLINTNEXTLINE(google3-runtime-global-variables)
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static DirectExecutor instance;
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return instance;
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}
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void Execute(Runnable &&runnable) override { runnable(); }
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void Shutdown() override {}
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private:
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DirectExecutor() = default;
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};
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} // namespace nearby
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#endif // THIRD_PARTY_NEARBY_INTERNAL_PLATFORM_DIRECT_EXECUTOR_H_
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