#include?“child.h“

int?count=0;		/*每個(gè)子進(jìn)程的運(yùn)算次數(shù)*/
int?id;

/*終止子進(jìn)程*/
void?killchild（）{
????printf（“pid:%dcount:%d\n“getpid（）count）;
????exit（1）;
}

/*刪除信號(hào)量*/
void?delete_sem（）{
????if（semctl（id0?IPC_RMID?0）==-1）{
	????printf（“delete?sem?error\n“）;
????}
????printf（“delete?sem?scuueed\n“）;
}

/*收到消息*/
void?recieve_message（mqd_t?mqdchar?*addrint?semid）{
????struct?mq_attr?mqattr;
????mq_getattr（mqd&mqattr）;
????int?msg[mqattr.mq_msgsize];

????if（（mq_receive（mqdmsgmqattr.mq_msgsizeNULL））!=-1）{
	P（semid）;		/*上鎖*/
	if（msg[1]==1）{
	????addr[msg[0]]--;
	}
	else{
	????addr[msg[0]]++;
	}
	V（semid）;		/*釋放鎖*/
	count++;
????}

}

/*上鎖*/
void?P（int?id）
{
????struct?sembuf?sb[1]=?{0-1?0};
????semop（id?sb?1）;
}

/*釋放鎖*/
void?V（int?id）
{
????struct?sembuf?sb[1]?=?{0?1?0};
????semop（id?sb?1）;
}

/*初始化信號(hào)量*/
void?init_sem（int?semid）{
????id=semid;
????semun?su={1};

????semctl（semid0SETVALsu）;
}

?屬性????????????大小?????日期????時(shí)間???名稱(chēng)
-----------?---------??----------?-----??----
?????目錄???????????0??2018-08-14?09:54??吳月輝_操作系統(tǒng)編碼練習(xí)一\
?????目錄???????????0??2018-08-14?09:53??吳月輝_操作系統(tǒng)編碼練習(xí)一\test1\
?????文件?????????320??2018-08-10?14:28??吳月輝_操作系統(tǒng)編碼練習(xí)一\test1\Makefile
?????文件?????????993??2018-08-14?09:55??吳月輝_操作系統(tǒng)編碼練習(xí)一\test1\child.c
?????文件?????????382??2018-08-14?09:50??吳月輝_操作系統(tǒng)編碼練習(xí)一\test1\child.h
?????文件????????2155??2018-08-14?09:56??吳月輝_操作系統(tǒng)編碼練習(xí)一\test1\father.c
?????文件?????????414??2018-08-14?09:51??吳月輝_操作系統(tǒng)編碼練習(xí)一\test1\father.h
?????文件????????1328??2018-08-14?09:57??吳月輝_操作系統(tǒng)編碼練習(xí)一\test1\main.c
?????文件???????14680??2018-08-14?09:51??吳月輝_操作系統(tǒng)編碼練習(xí)一\test1\test1.exe
?????文件??????150016??2018-08-10?18:01??吳月輝_操作系統(tǒng)編碼練習(xí)一\運(yùn)行說(shuō)明及實(shí)驗(yàn)截圖.doc