#ifndef __XHL_H__#define __XHL_H__#include <sys/sem.h>#include <stdio.h>#include <stdlib.h>class SemClass{public:	SemClass();	SemClass(key_t key,int mutex);	//初始化信號(hào)量	//key信號(hào)量唯一的標(biāo)識(shí)符	//mutex共建立幾個(gè)信號(hào)量	void SemInit(key_t key,int mutex);	//sem_num第幾個(gè)信號(hào)量, 從零開始,到mutex-1	//pv信號(hào)量初值,也就是資源數(shù)量	void SemSet(short sem_num,short pv);	void P(short sem_num); //減	void V(short sem_num); //增private:	struct sembuf m_ops,*m_pops;	int m_sem_id;	key_t m_key;	int m_mutex;private:	void PV(short sem_num,short pv);};#endif //__XHL_H__