server/module_service/area_business_count_checker.h

#ifndef _area_business_count_checker_hpp_
#define _area_business_count_checker_hpp_

#include "area_business.h"
#include "atomic"

/*
	判断当前区域a中的人数是否超过设定人数，超过后告警
	区域内实时人数存储在area对象中,在当前类on_enter/on_leave中进行更新
	整个井下的超员和某个区域的超员都使用这个代码
*/
struct area_business_count_checker:area_business
{
    area_business_count_checker()
    {
        m_mutex=0;
    }
	//服务器重启加载数据
	void on_load_his(const std::shared_ptr<area_hover>&a,const std::shared_ptr<card_location_base>&c,std::shared_ptr<business_data>&ptr);
	//增加计数,并进行判断
	void on_enter(const std::shared_ptr<area_hover>&a,const std::shared_ptr<card_location_base>&c,std::shared_ptr<business_data>&ptr);
	void on_hover(const std::shared_ptr<area_hover>&a,const std::shared_ptr<card_location_base>&c,std::shared_ptr<business_data> ptr);
	//减少计数
	void on_leave(const std::shared_ptr<area_hover>&a,const std::shared_ptr<card_location_base>&c,std::shared_ptr<business_data> ptr);
private:
	std::atomic<int> m_mutex;
	void lock()
	{
		int expected=0;
		while(!m_mutex.compare_exchange_strong(expected,1))
			expected=0;
		assert(m_mutex.load()==1);
	}

	void unlock()
	{
		m_mutex.store(0);
	}

};


#endif