多核多线程 examples总.docx

1、多核多线程 examples总1使用Win32 线程API：使用CreateThread 创建线程#include stdafx.h#include #include using namespace std;DWORD WINAPI FunOne(LPVOID param) while(1) Sleep(1000); coutThis is FunOne endl; return 1; DWORD WINAPI FunTwo(LPVOID param) while(1) Sleep(1000); coutThis is FunTwo endl; return 1;int main(int ar

2、gc, char* argv) DWORD lp1=0,lp2=0; HANDLE hand1=CreateThread (NULL, 0, FunOne, NULL, CREATE_SUSPENDED, &lp1); HANDLE hand2=CreateThread (NULL, 0, FunTwo, NULL, CREATE_SUSPENDED, &lp2); system(pause); ResumeThread(hand1); ResumeThread(hand2); system(pause); return 0;2使用Win32 线程API：使用_beginthread 创建线程

3、#include stdafx.h#include #include #include #include using namespace std;void ThreadFunc1(PVOID param)Sleep(1000); coutThis is ThreadFunc1endl;void ThreadFunc2(PVOID param) Sleep(1000); coutThis is ThreadFunc2endl;int main() int i=0; _beginthread(ThreadFunc1,0,NULL); _beginthread(ThreadFunc2,0,NULL)

4、; Sleep(3000); coutendendl; return 0;3线程管理实例1#include stdafx.h#include #include using namespace std;DWORD WINAPI FunOne(LPVOID param) while(true) Sleep(1000); couthello! ; return 0; DWORD WINAPI FunTwo(LPVOID param) while(true) Sleep(1000); coutinput; if(input=1) ResumeThread(hand1); ResumeThread(ha

5、nd2); if(input=2) SuspendThread(hand1); SuspendThread(hand2); if(input=0) TerminateThread(hand1,1); TerminateThread(hand2,1); if(input=9) return 0; ; return 0;线程管理实例2在主线程中创建一个线程中通过自增对Counter 计数到1000000，主线程一直等待其结束：#include stdafx.h#include #include #include #include unsigned Counter;unsigned _stdcall

6、 SecondThreadFunc(void *pArguments) printf(In second thread.n); while (Counter %dn, Counter); / Destroy the thread object. CloseHandle(hThread);线程管理实例2主线程通过GetExitCodeThread 来判断两个线程是否结束运行：#include stdafx.h#include #include #include #include #include /* Take the startup value, do some simple math on

7、it,* and return the calculated value.*/DWORD WINAPI ThreadFunc(LPVOID n) Sleep(DWORD)n*1000*2); return (DWORD)n * 10;int main() HANDLE hThrd1; HANDLE hThrd2; DWORD exitCode1 = 0; DWORD exitCode2 = 0; DWORD threadId; hThrd1 = CreateThread(NULL, 0, ThreadFunc, (LPVOID)1, 0, &threadId ); if (hThrd1) pr

8、intf(Thread 1 launchedn); hThrd2 = CreateThread(NULL, 0, ThreadFunc, (LPVOID)2, 0, &threadId ); if (hThrd2) printf(Thread 2 launchedn); / Keep waiting until both calls to GetExitCodeThread succeed AND / neither of them returns STILL_ACTIVE. for (;) printf(Press any key to exit.n); _getch(); GetExitC

9、odeThread(hThrd1, &exitCode1); GetExitCodeThread(hThrd2, &exitCode2); if ( exitCode1 = STILL_ACTIVE ) puts(Thread 1 is still running!); if ( exitCode2 = STILL_ACTIVE ) puts(Thread 2 is still running!); if ( exitCode1 != STILL_ACTIVE & exitCode2 != STILL_ACTIVE ) break; CloseHandle(hThrd1); CloseHand

10、le(hThrd2); printf(Thread 1 returned %dn, exitCode1); printf(Thread 2 returned %dn, exitCode2); return EXIT_SUCCESS;线程管理实例3多线程程序运行顺序的不可预料：#include stdafx.h#include #include #include #include DWORD WINAPI ThreadFunc(LPVOID n) int i; for (i = 0; i 10; i+) printf(%d%d%d%d%d%d%d%dn, n, n, n, n, n, n, n,

11、 n); return 0;int main() HANDLE hThrd; DWORD threadId; int i; for (i = 0; i 5; i+) hThrd = CreateThread(NULL, 0, ThreadFunc, (LPVOID)i, 0, &threadId); if (hThrd) printf(Thread launched %dn, i); CloseHandle(hThrd); / Wait for the threads to complete. Sleep(2000); return EXIT_SUCCESS;4 同步全局变量#include

12、stdafx.h#include #include using namespace std;int globalvar = false;DWORD WINAPI ThreadFunc(LPVOID pParam) coutThreadFuncendl; Sleep(200); globalvar = true; return 0;int main() HANDLE hthread = CreateThread(NULL, 0, ThreadFunc, NULL, 0, NULL); if (!hthread) coutThread Create Error ! endl; CloseHandl

13、e(hthread); while (!globalvar) coutThread whileendl; coutThread exitendl; return 0;5 事件机制应用实例#include stdafx.h#include #include #include #include using namespace std;HANDLE evRead, evFinish;void ReadThread(LPVOID param) WaitForSingleObject (evRead ,INFINITE); coutReadingendl; SetEvent (evFinish);voi

14、d WriteThread(LPVOID param) coutWritingendl; SetEvent (evRead);int main(int argc , char * argv) evRead = CreateEvent (NULL ,FALSE ,FALSE ,NULL) ; evFinish = CreateEvent (NULL ,FALSE ,FALSE ,NULL) ; _beginthread(ReadThread , 0 , NULL) ; _beginthread(WriteThread , 0 , NULL) ; WaitForSingleObject (evFi

15、nish,INFINITE) ; coutThe Program is Endendl; return 0 ;6临界区同步机制实例#include stdafx.h#include #include #include #include using namespace std;int total = 100 ;HANDLE evFin2 ;CRITICAL_SECTION cs ;void WithdrawThread1(LPVOID param) EnterCriticalSection(&cs) ; if ( total-90 = 0) total -= 90 ; coutYou withd

16、raw 90endl; else coutYou do not have that much money= 0) total -= 20 ; coutYou withdraw 20endl; else coutYou do not have that much moneyendl; LeaveCriticalSection(&cs) ; SetEvent (evFin1) ;int main(int argc , char * argv) evFin0 = CreateEvent (NULL,FALSE,FALSE,NULL) ; evFin1 = CreateEvent (NULL,FALS

17、E,FALSE,NULL) ; InitializeCriticalSection(&cs) ; _beginthread(WithdrawThread1 , 0 , NULL) ; _beginthread(WithdrawThread2 , 0 , NULL) ; WaitForMultipleObjects(2 ,evFin ,TRUE ,INFINITE) ; DeleteCriticalSection(&cs) ; couttotalendl; return 0 ;6 临界区同步机制实例 潜在的死锁问题#include stdafx.h#include #include #inclu

18、de CRITICAL_SECTION cs1, cs2;long WINAPI ThreadFn(long lParam) while (TRUE) EnterCriticalSection(&cs2); printf(n 线程2 占用临界区2); EnterCriticalSection(&cs1); printf(n 线程2 占用临界区1); printf(n 线程2 占用两个临界区); LeaveCriticalSection(&cs1); LeaveCriticalSection(&cs2); printf(n 线程2 释放两个临界区); Sleep(20); int main(in

19、t argc , char * argv) DWORD iThreadID; InitializeCriticalSection(&cs1); InitializeCriticalSection(&cs2); CloseHandle(CreateThread(NULL, 0, (LPTHREAD_START_ROUTINE)ThreadFn, NULL, 0,&iThreadID); while (TRUE) EnterCriticalSection(&cs1); printf(n 线程1 占用临界区1); EnterCriticalSection(&cs2); printf(n 线程1 占用

20、临界区2); printf(n 线程1 占用两个临界区); LeaveCriticalSection(&cs2); LeaveCriticalSection(&cs1); printf(n 线程1 释放两个临界区); Sleep(20); ; return (0);7互斥量同步机制实例VC6与VS2003等默认使用ANSI编码，而VS2005默认采用Unicode进入工程属性设置菜单。选择configuration properties - General - 在左边project default 中character set中设置 not set。#include stdafx.h#incl

21、ude #include #define THREAD_INSTANCE_NUMBER 3using namespace std;LONG g_fResourceInUse = FALSE;LONG g_lCounter = 0;DWORD ThreadProc(void * pData) int ThreadNumberTemp = (*(int*) pData); HANDLE hMutex; if (hMutex = OpenMutex(MUTEX_ALL_ACCESS, FALSE, Mutex.Test) = NULL) cout Open Mutex error! endl; Wa

22、itForSingleObject( hMutex, INFINITE); cout ThreadProc: ThreadNumberTemp is running! endl; cout ThreadProc ThreadNumberTemp gets the mutex endl; ReleaseMutex(hMutex); CloseHandle(hMutex); return 0;int main(int argc, char* argv) int i; DWORD IDTHREAD_INSTANCE_NUMBER; HANDLE hTHREAD_INSTANCE_NUMBER; HA

23、NDLE hMutex; if ( (hMutex = OpenMutex(MUTEX_ALL_ACCESS, FALSE, Mutex.Test) = NULL) if (hMutex = CreateMutex(NULL, FALSE, Mutex.Test) = NULL ) cout Create Mutex error! endl; return 0; for (i=0;iTHREAD_INSTANCE_NUMBER;i+) WaitForSingleObject( hMutex, INFINITE); hi = CreateThread(NULL, 0, (LPTHREAD_STA

24、RT_ROUTINE) ThreadProc, (void *)&IDi,0,&(IDi); if (hi = NULL) cout CreateThread error IDi endl; else cout CreateThread: IDi endl; ReleaseMutex(hMutex); WaitForMultipleObjects(THREAD_INSTANCE_NUMBER,h,TRUE,INFINITE); cout Close the Mutex Handle! endl; CloseHandle(hMutex); system(pause); return 0;8信号量同步机制实例1#include stdafx.h#include #include using namespace std;#define THREAD_INSTANCE_NUMBER 3DWORD foo(void * pData) int ThreadNumberTemp = (*(int*) pData); HANDLE hSemaphore; if (hSemaphore = OpenSemaphore(SEMAPHORE_ALL