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// Copyright (c) Microsoft Corporation. All rights reserved.
// Licensed under the MIT license.
#pragma once
//-----------------------------------------------------------------------------
// SimpleMutex
//-----------------------------------------------------------------------------
class SimpleMutex final
    PROHIBIT_COPY(SimpleMutex)
    using Impl = std::mutex;
    SimpleMutex();
    Impl& GetImpl() { return *m_pImpl; }
    const Impl& GetImpl() const { return *m_pImpl; }
    void Lock();
    bool TryLock();
    void Unlock();
    ~SimpleMutex();
    Impl* m_pImpl;
//-----------------------------------------------------------------------------
// RecursiveMutex
//-----------------------------------------------------------------------------
class RecursiveMutex final
    PROHIBIT_COPY(RecursiveMutex)
    using Impl = std::recursive_mutex;
    RecursiveMutex();
    Impl& GetImpl() { return *m_pImpl; }
    const Impl& GetImpl() const { return *m_pImpl; }
    void Lock();
    bool TryLock();
    void Unlock();
    ~RecursiveMutex();
    Impl* m_pImpl;
//-----------------------------------------------------------------------------
// NullMutex
//-----------------------------------------------------------------------------
class NullMutex final
    PROHIBIT_COPY(NullMutex)
    NullMutex() {}
    void Lock() {}
    bool TryLock() { return true; }
    void Unlock() {}
//-----------------------------------------------------------------------------
// MutexLock
//-----------------------------------------------------------------------------
template <class TMutex> class MutexLock final
    PROHIBIT_COPY(MutexLock)
    PROHIBIT_HEAP(MutexLock)
    explicit MutexLock(TMutex& mutex):
        m_Mutex(mutex)
        m_Mutex.Lock();
    MutexLock(TMutex& mutex, bool doLock):
        m_Mutex(mutex)
        if (doLock)
            m_Mutex.Lock();
    ~MutexLock()
        m_Mutex.Unlock();
    TMutex& m_Mutex;
//-----------------------------------------------------------------------------
// lock scope macros
//-----------------------------------------------------------------------------
#define BEGIN_MUTEX_SCOPE(MUTEX) \
        DISABLE_WARNING(4456) /* declaration hides previous local declaration */ \
        MutexLock<decltype(MUTEX)> t_MutexLock(MUTEX); \
        DEFAULT_WARNING(4456)
#define END_MUTEX_SCOPE \
        IGNORE_UNUSED(t_MutexLock); \
//-----------------------------------------------------------------------------
// OnceFlag
//-----------------------------------------------------------------------------
class OnceFlag final
    PROHIBIT_COPY(OnceFlag)
    OnceFlag();
    void CallOnce(const std::function<void()>& func);
    ~OnceFlag();
    class Impl;
    Impl* m_pImpl;

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