readerwriter.h

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/*===========================================================================
     _____        _____        _____        _____
 ___|    _|__  __|_    |__  __|__   |__  __| __  |__  ______
|    \  /  | ||    \      ||     |     ||  |/ /     ||___   |
|     \/   | ||     \     ||     \     ||     \     ||___   |
|__/\__/|__|_||__|\__\  __||__|\__\  __||__|\__\  __||______|
    |_____|      |_____|      |_____|      |_____|

--[Mark3 Realtime Platform]--------------------------------------------------

Copyright (c) 2012 - 2019 m0slevin, all rights reserved.
See license.txt for more information
===========================================================================*/
#pragma once

#include "mark3cfg.h"
#include "blocking.h"
#include "mutex.h"

namespace Mark3
{
class ReaderWriterLock
{
public:
    void* operator new(size_t sz, void* pv) { return reinterpret_cast<ReaderWriterLock*>(pv); }

    void Init();

    void AcquireReader();

    bool AcquireReader(uint32_t u32TimeoutMs_);

    void ReleaseReader();

    void AcquireWriter();

    bool AcquireWriter(uint32_t u32TimeoutMs_);

    void ReleaseWriter();

private:
    bool AcquireReader_i(uint32_t u32TimeoutMs_);
    bool AcquireWriter_i(uint32_t u32TimeoutMs_);

    Mutex   m_clGlobalMutex; 
    Mutex   m_clReaderMutex; 
    uint8_t m_u8ReadCount;   
};

} // namespace Mark3