#include?“windows.h“
#include?
#include?
#include?
#include?
#include?
#include??

#define?READER?‘R‘???????????????????//讀者
#define?WRITER?‘W‘???????????????????//寫者
#define?INTE_PER_SEC?1000????????????//每秒時鐘中斷的數目
#define?MAX_THREAD_NUM?64????????????//最大線程數目
#define?MAX_FILE_NUM?32??????????????//最大文件數目
#define?MAX_STR_LEN?32???????????????//字符串的長度

int?readcount=0;?????????????????????//讀者數目
int?writecount=0;????????????????????//寫者數目

CRITICAL_SECTION?RP_Write;???????????//臨界區
CRITICAL_SECTION?cs_Write;
CRITICAL_SECTION?cs_Read;

struct?ThreadInfo
{
	int?serial;??????????????????????//線程序號
	char?entity;?????????????????????//線程類別（判斷是讀者線程還是寫者線程）
	double?delay;????????????????????//線程延遲時間
	double?persist;??????????????????//線程讀寫操作時間
};


/**************************************************************************/
//讀者優先---讀者線程
//P:讀者線程信息

void?RP_ReaderThread（void?*p）
{
	//互斥變量
	HANDLE?h_Mutex;
	h_Mutex=OpenMutex（MUTEX_ALL_ACCESSFALSE“mutex_for_readcount“）;
	
	DWORD?wait_for_mutex;????????????//等待互斥變量所有權
	DWORD?m_delay;???????????????????//延遲時間
	DWORD?m_persist;?????????????????//讀文件持續時間
	int?m_serial;????????????????????//線程序號
	//從參數中獲得信息
	m_serial=（（ThreadInfo*）（p））->serial;
	m_delay=（DWORD）（（（ThreadInfo*）（p））->delay?*INTE_PER_SEC）;
	m_persist=（DWORD）（（（ThreadInfo*）（p））->persist?*INTE_PER_SEC）;
	Sleep（m_delay）;??????????????????//延遲等待
	
	printf（“Reader?thread?%d?sents?the?reading?require.\n“m_serial）;
	
	//等待互斥信號保證對ReadCount?的訪問、修改互斥
	wait_for_mutex=WaitForSingleobject（h_Mutex-1）;
	//讀者數目增加
	readcount++;
	if（readcount==1）
	{
		//第一個讀者等待資源
		EnterCriticalSection（&RP_Write）;
	}
	ReleaseMutex（h_Mutex）;????????????//釋放互斥信號
	
	//讀文件
	printf（“Reader?thread?%d?begins?to?read?file.\n“m_serial）;
	Sleep（m_persist）;
	
	//退出線程
	printf（“Reader?thread?%d?finished?reading?file.\n“m_serial）;
	//等待互斥信號保證對ReadCount的訪問修改互斥
	wait_for_mutex=WaitForSingleobject（h_Mutex-1）;
	//讀者數目減少
	readcount--;
	if（readcount==0）
	{
		//如果所有的讀者讀完喚醒寫者
		LeaveCriticalSection（&RP_Write）;
	}
	ReleaseMutex（h_Mutex）;??????????//釋放互斥信號
}


/**************************************************************************/
//讀者優先---寫者線程
//P:寫者線程信息

void?RP_WriterThread（void?*p）
{
	DWORD?m_delay;???????????????????//延遲時間
	DWORD?m_persist;?????????????????//寫文件持續時間
	int?m_serial;????????????????????//線程序號
	//??從參數中獲得信息
	m_serial=（（ThreadInfo*）（p））->serial?;
	m_delay=（DWORD）（（（ThreadInfo*）（p））->delay?*INTE_PER_SEC）;
	m_persist=（DWORD）（（（ThreadInfo*）（p））->persist?*INTE_PER_SEC）;
	Sleep（m_delay）;
	
	printf（“Writer?thread?%d?sents?the?writing?require.\n“m_serial）;
	
	//等待資源
	EnterCriticalSection（&RP_Write）;

	//寫文件
	printf（“Writer?thread?%d?begins?to?write?to?the?file.\n“m_serial）;
	Sleep（m_persist）;
	
	//退出線程
	printf（“Writer?thread?%d?finished?writing?to?the?file.\n“m_serial）;
	
	//釋放資源
	LeaveCriticalSection（&RP_Write）;

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

?????文件??????10121??2007-06-23?14:01??Reader?and?Writer.cpp

?????文件?????????45??2007-04-13?16:19??thread.txt

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

????????????????10166????????????????????2