blocking.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 "kerneltypes.h"
#include "mark3cfg.h"

#include "ll.h"
#include "threadlist.h"

namespace Mark3
{
class Thread;

//---------------------------------------------------------------------------
class BlockingObject
{
public:
    BlockingObject() { m_u8Initialized = m_uBlockingInvalidCookie; }
    ~BlockingObject() { m_u8Initialized = m_uBlockingInvalidCookie; }

protected:
    void Block(Thread* pclThread_);

    void BlockPriority(Thread* pclThread_);

    void UnBlock(Thread* pclThread_);

    void SetInitialized(void) { m_u8Initialized = m_uBlockingInitCookie; }

    bool IsInitialized(void) { return (m_u8Initialized == m_uBlockingInitCookie); }

    // Cookies used to determine whether or not an object has been initialized
    static constexpr auto m_uBlockingInvalidCookie = uint8_t { 0x3C };
    static constexpr auto m_uBlockingInitCookie    = uint8_t { 0xC3 };

    ThreadList m_clBlockList;

    uint8_t m_u8Initialized;
};
} // namespace Mark3