polymorphic_mutex.cxx

#pragma once

#include <mutex>

struct polymorphic_mutex
{
    virtual void lock() = 0;
    virtual void unlock() = 0;
    virtual bool try_lock() = 0;
};

class recursive_polymorphic_mutex : public polymorphic_mutex
{
  std::recursive_mutex mutex;
public:
    virtual void lock() override
    {
        mutex.lock();
    }
    virtual void unlock() override
    {
        mutex.unlock();
    }
    virtual bool try_lock() override
    {
        return mutex.try_lock();
    }
};

struct polymorphic_null_mutex : polymorphic_mutex
{
    virtual void lock() override {}
    virtual void unlock() override {}
    virtual bool try_lock() override {return true;}
};