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69 lines
2.0 KiB
C++
69 lines
2.0 KiB
C++
// Copyright 2021 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_IMPL_WINDOWS_MUTEX_H_
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#define PLATFORM_IMPL_WINDOWS_MUTEX_H_
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#include <windows.h>
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#include <stdio.h>
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#include <synchapi.h>
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#include <memory>
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#include <mutex> // NOLINT
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#include "absl/memory/memory.h"
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#include "platform/api/mutex.h"
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namespace location {
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namespace nearby {
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namespace windows {
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// A lock is a tool for controlling access to a shared resource by multiple
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// threads.
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//
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// https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/locks/Lock.html
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class Mutex : public api::Mutex {
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public:
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Mutex(Mutex::Mode mode);
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~Mutex() override = default;
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void Lock() override;
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void Unlock() override;
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std::mutex& GetWindowsMutex();
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std::recursive_mutex& GetWindowsRecursiveMutex();
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private:
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Mutex::Mode mode_;
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std::mutex mutex_impl_; // The actual mutex allocation
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std::mutex& mutex_ =
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mutex_impl_; // This is passed to other windows functions, must be by
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// reference to avoid ownership problems
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std::recursive_mutex recursive_mutex_impl_; // The actual mutex allocation
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std::recursive_mutex& recursive_mutex_ =
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recursive_mutex_impl_; // This is passed to other windows functions,
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// must be by reference to avoid ownership
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// problems
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};
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} // namespace windows
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} // namespace nearby
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} // namespace location
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#endif // PLATFORM_IMPL_WINDOWS_MUTEX_H_
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