#include?
#include?
#include?
#include?
#include?
#include?
#include?
#include?
#include?
#if?defined?（__GNU_LIBRARY__）&&?!defined?（_SEM_SEMUN_UNDEFINED）

#else

union?semun
{
	int?val;
	struct?semid_ds?*buf;
	unsigned?short?int?*array;
	struct?seminfo?*__buf;
};


#endif

#define?SHMDATASIZE?1000
#define?BUFFERSIZE?（SHMDATASIZE?-sizeof（int））


#define?WAITING?8
#define?MUTEX?16
#define?CHAIRS?3
#define?CUS?20
#define?BAR?28



#define?MAXSIZE?100


int?Semid?=?0;

void?customer?（int?shmid）;

void?barbers（int?shmid）;

void?v（int?*mutex）;
void?p（int?*mutex）;


int?masterinit?（void）;
int?*standardinit?（int?shmidint?*semid）;
void?delete?（void）;
void?sigdelete?（int?signum）;
void?cuthair（int?shmidint?semidchar?*buffer）;

int?mysemget?（key_t?kyeint?nsemsint?semflg）;
int?mysemctl?（int?shmidint?semnumint?cmdunion?semun?arg）;
int?mysemop?（int?semidstruct?sembuf?*sopsunsigned?nsops）;
int?myshmget?（key_t?keyint?sizeint?shmflg）;
void?*myshmat?（int?shmidconst?void?*shmaddrint?shmflg）;
int?myshmctl?（int?shmidint?cmdstruct?shmid_ds?*buf）;

int?main?（int?argcchar?*argv[]）
{	
	char?selection[3];
	int?shmid;

	if?（argc?	{
		shmid?=?masterinit（）;
	}
	else?
	{
		shmid?=?atoi?（argv[1]）;
	}
	printf?（“Who?are?you?customer（1）?barber（2）?\n“）;
	fgets?（selectionsizeof?（selection）stdin）;
	
	switch?（selection[0]）
	{
		case?‘1‘:customer（shmid）;break;
		case?‘2‘:barbers（shmid）;break;
	
		default:printf?（“invalid?choicequit?\n“）;
	}
	return?0;
}

void?customer（int?shmid）
{
	int?semid=0;
	int?*buffer=0;
	int?*waiting=0;
	int?*customers=0;
	int?*mutex=0;
	int?*barbers=0;
	
	char?selection[3];

	buffer=standardinit（shmid&semid）;
	waiting=buffer+WAITING;
	mutex=buffer+MUTEX;
	
	
	customers=buffer+CUS;
	barbers=buffer+BAR;
	
	printf（“?begin?to?run?the?id?of?share?memory?is?%d?semaphore?id?is?%d?\n“shmidsemid）;
	??//??printf（“Press?any?key?when?you?want?to?cut?hair...	\n“）;
	//	fgets?（selectionsizeof?（selection）stdin）;
	????//???	fflush（stdout）;
		
		printf（“Now?waiting?for?mutex...?\n“）;
		
		p（mutex）;
		*waiting=*waiting+1;
		if（*waiting???????????????????????
			
			v（customers）;
			v（mutex）;
????????????????????????printf（“waiting?for?barber...\n“）;
			p（barbers）;
????????????????????????printf（“you?are?getting?hair?cut...\n“）;
			*waiting=*waiting-1;
			printf（“finished\n“）;
		}
		else?{v（mutex）;*waiting=*waiting-1;
			printf（“so?many?peoplelet‘s?go!\n“）;
	??	}
	
}

void?barbers（int?shmid）
{	int?semid=0;
	int?*buffer=0;
	int?*waiting=0;
	int?*customers=0;
	int?*mutex=0;
	int?*barbers=0;
	
	char?selection[3];

	buffer=standardinit（shmid&semid）;
	waiting=buffer+WAITING;
	mutex=buffer+MUTEX;
	customers=buffer+CUS;
	barbers=buffer+BAR;
	
	while（1）{char?input[3];
		



????????????????printf（“waiting?for?customer\n“）;
		p（customers）;
???????????????//?printf（“waiting?for?mutex\n“）;
		//p（mutex）;
		//*waiting=*waiting-1;
		printf（“Press?any?key?when

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----

?????文件?????245726??2007-12-24?23:12??report.pdf

?????文件???????9297??2007-12-17?17:12??c

?????文件???????5906??2007-12-17?16:57??cusbar.c

?????文件?????160388??2007-12-24?23:11??readme.pdf

-----------?---------??----------?-----??----

???????????????421317????????????????????4