??/*————————————————————————————————
??在同一個進程地址空間內執行的兩個線程。生產者線程生產物品，
??然后將物品放置在一個空緩沖區中供消費者線程消費。消費者線
??程從緩沖區中獲得物品，然后釋放緩沖區。當生產者線程生產物
??品時，如果沒有空緩沖區可用，那么生產者線程必須等待消費者
??線程釋放出一個空緩沖區。當消費者線程消費物品時，如果沒有
??滿的緩沖區，那么消費者線程將被阻塞，直到新的物品被生產出
??來。
——————————————————————————————————*/
??#include???
??#include
??#include???
????
??const???unsigned???short???SIZE_OF_BUFFER???=???10;???//緩沖區長度???
??unsigned???short???ProductID???=???0;?????????//產品號???
??unsigned???short???ConsumeID???=???0;?????????//將被消耗的產品號???
??unsigned???short???in???=???0;?????????????//產品進緩沖區時的緩沖區下標???
??unsigned???short???out???=???0;?????????????//產品出緩沖區時的緩沖區下標???
????
??int???g_buffer[SIZE_OF_BUFFER];?????????//緩沖區是個循環隊列???
??bool???g_continue???=???true;?????????????//使程序跳出循環，控制程序結束???
??HANDLE???g_hMutex;???????????????//用于線程間的互斥???
??HANDLE???g_hFullSemaphore;???????????//當緩沖區滿時迫使生產者等待???
??HANDLE???g_hEmptySemaphore;???????????//當緩沖區空時迫使消費者等待???
????
??DWORD???WINAPI???Producer（LPVOID）;?????????//生產者線程???
??DWORD???WINAPI???Consumer（LPVOID）;?????????//消費者線程???
????
??int???main（）???
??{???
??????????//創建各個互斥信號???
??????????g_hMutex???=???CreateMutex（NULLFALSENULL）;??//?三個參數分別為：指向安全屬性的指針?
												//初始化互斥對象的所有者指向互斥對象名的指針
??????????//創建緩沖區滿的信號量
??????????g_hFullSemaphore???=???CreateSemaphore（NULLSIZE_OF_BUFFER-1SIZE_OF_BUFFER-1NULL）;?
														//四個參數分別為：表示是否允許繼承、
														//設置信號機的初始計數、設置信號機的
		??												//最大計數、指定信號機對象的名稱（-1是因為計數從0開始）
??????????//創建緩沖區空的信號量
		??g_hEmptySemaphore???=???CreateSemaphore（NULL0SIZE_OF_BUFFER-1NULL）;???
????
??????????//調整下面的數值，可以發現，當生產者個數多于消費者個數時，???
??????????//生產速度快，生產者經常等待消費者；反之，消費者經常等待?????
??????????const???unsigned???short???PRODUCERS_COUNT???=???3;?????//生產者的個數???
??????????const???unsigned???short???CONSUMERS_COUNT???=???3;?????//消費者的個數???
????
??????????//總的線程數???
??????????const???unsigned???short???THREADS_COUNT???=???PRODUCERS_COUNT+CONSUMERS_COUNT;???
????
??????????HANDLE???hThreads[PRODUCERS_COUNT];???//各線程的handle???
??????????DWORD???producerID[CONSUMERS_COUNT];???//生產者線程的標識符???
??????????DWORD???consumerID[THREADS_COUNT];???//消費者線程的標識符???
????
??????????//為每一個生產者創建生產者線程???
??????????for（int?i=0;i??????????????????hThreads[i]=CreateThread（NULL0ProducerNULL0&producerID[i]）;???
??????????????????if???（hThreads[i]==NULL）???return???-1;???
??????????}???
??????????//為每一個消費者創建消費者線程???
??????????for（int?j=0;j??????????????????hThreads[PRODUCERS_COUNT+j]=CreateThread（NULL0ConsumerNULL0&consumerID[j]）;???
??????????????????if???（hThreads[j]==NULL）???return???-1;???
??????????}???
????
??????????while（g_continue）{???
??????????????????if（getchar（））{???//按回車后終止程序運行???
??????????????????????????g_continue???=???false;???
??????????????????}???
??????????}???
????
??????????return???0;???
??}???
????
??//生產一個產品。簡單模擬了一下，僅輸出新產品的ID號???
??void???Produce（）???
??{???
	??????

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

?????文件?????184436??2009-01-04?20:40??Debug\sx3.exe

?????文件?????229928??2009-01-04?20:40??Debug\sx3.ilk

?????文件??????25242??2009-01-04?20:40??Debug\sx3.obj

?????文件????3616828??2009-01-04?20:40??Debug\sx3.pch

?????文件?????394240??2009-01-04?20:40??Debug\sx3.pdb

?????文件?????148480??2009-01-04?20:40??Debug\vc60.idb

?????文件??????86016??2009-01-04?20:40??Debug\vc60.pdb

?????文件?????208955??2007-12-31?21:33??sx3（1消費者，3個生產者）.exe

?????文件?????208954??2008-01-03?20:43??sx3（3個生產者，4個消費者，15個緩沖區）.exe

?????文件?????208955??2007-12-31?21:37??sx3（3個消費者，1個生產者）.exe

?????文件?????208955??2007-12-31?21:38??sx3（3個消費者，3個生產者）.exe

?????文件???????6847??2007-12-31?22:00??sx3.cpp

?????文件???????3365??2009-01-04?20:40??sx3.dsp

?????文件????????531??2009-01-04?20:41??sx3.dsw

?????文件??????33792??2009-01-04?20:41??sx3.ncb

?????文件??????48640??2009-01-04?20:41??sx3.opt

?????文件????????731??2009-01-04?20:40??sx3.plg

?????文件????1412608??2009-01-03?21:11??操作系統原理實驗報告.doc

?????目錄??????????0??2009-01-04?20:40??Debug

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

??????????????7027503????????????????????19