/******************************************************* *一般情况下多线程编程多采用MFC类库实现,那么如果不使用MFC 如何进行多线程程序设计呢?本文将就这个问题进行讨论: 微软在Windows API中提供了建立新的线程的函数CreateThread,它的语法如下: hThread = CreateThread (&security_attributes, dwStackSize, ThreadProc,pParam, dwFlags, &idThread) ; 第一个参数是指向SECURITY_ATTRIBUTES型态的结构的指针。在Windows 98中忽略该参数。在Windows NT中,它被设为NULL。第二个参数是用于新线程的初始堆栈大小,默认值为0。在任何情况下,Windows根据需要动态延长堆栈的大小。 CreateThread的第三个参数是指向线程函数的指标。函数名称没有限制,但是必须以下列形式声明: DWORD WINAPI ThreadProc (PVOID pParam) ; CreateThread的第四个参数为传递给ThreadProc的参数。这样主线程和从属线程就可以共享数据。 CreateThread的第五个参数通常为0,但当建立的线程不马上执行时为旗标CREATE_SUSPENDED。线程将暂停直到呼叫ResumeThread来恢复线程的执行为止。第六个参数是一个指标,指向接受执行绪ID值的变量。 大多数Windows程序写作者喜欢用在PROCESS.H表头文件中声明的C执行时期链接库函数_beginthread。它的语法如下: hThread = _beginthread (ThreadProc, uiStackSize, pParam) ; 它更简单,对于大多数应用程序很完美,这个线程函数的语法为: void __cdecl ThreadProc (void * pParam) ; 在建立多线程的Windows程序时,需要在「Project Settings」对话框中做一些修改。选择「C/C++」页面标签, 然后在「Category」下拉式清单方块中选择「Code Generation」。 在「Use Run-Time Library」下拉式清单方块中,可以看到用于「Release」设定的 「Single-Threaded」和用于Debug设定的「Debug Single-Threaded」。 将这些分别改为「Multithreaded」和「Debug Multithreaded」。 这将把编译器旗标改为/MT,它是编译器在编译多线程的应用程序所需要的。 对本贴有更好的方法或建议请不吝赐教,可以给本人留言或发邮件: Email:[email protected] Thanks! * deom1---四个线程同时写一个文件( 没有参数 ) * * ***********************************************************/ #if 0 #include <windows.h> #include <process.h> /* _beginthread, _endthread */ #include <iostream> #include <fstream> #include <conio.h> using namespace std; void ThreadFunc1(PVOID param) { while(1) { Sleep(SECOND); //out<<"This was draw by thread l"<<endl; cout<<"This was draw by thread l"<<endl; } } void ThreadFunc2(PVOID param) { while(1) { Sleep(SECOND); //out<<"This was draw by thread 2"<<endl; cout<<"This was draw by thread 2"<<endl; } } void ThreadFunc3(PVOID param) { while(1) { Sleep(SECOND); //out<<"This was draw by thread 3"<<endl; cout<<"This was draw by thread 3"<<endl; } } void ThreadFunc4(PVOID param) { while(1) { Sleep(SECOND); //out<<"This was draw by thread 4"<<endl; cout<<"This was draw by thread 4"<<endl; } } int main() { int i=0; _beginthread(ThreadFunc1,0,NULL); _beginthread(ThreadFunc2,0,NULL); _beginthread(ThreadFunc3,0,NULL); _beginthread(ThreadFunc4,0,NULL); getch(); cout<<"end"; return 0; } #endif #if 1 /******************************************************* * * deom2---四个线程同时写一个文件( 有参数 ) * * ***********************************************************/ #include <windows.h> #include <process.h> /* _beginthread, _endthread */ #include <iostream> #include <fstream> #include <string> #include <conio.h> using namespace std; #ifndef ULONG #define ULONG unsigned long #endif //ULONG #define SECOND 1000 //定义Sleep(SECOND)睡眠时间的大小 /* 0,等待,1运行 */ ULONG g_ulSignal = 0;//定义一个信号量,用于各线程中互斥 //ofstream out("out.txt"); //ofstream out("out.txt"); void ThreadFunc1(PVOID param) { while(1) { char *p; p=(char *) param; Sleep(SECOND); //out<<p<<"This was draw by thread l"<<endl; cout<<p<<"This was draw by thread l"<<endl; } } void ThreadFunc2(PVOID param) { while(1) { Sleep(SECOND); //out<<"This was draw by thread 2"<<endl; cout<<"This was draw by thread 2"<<endl; } } void ThreadFunc3(PVOID param) { while(1) { Sleep(SECOND); //out<<"This was draw by thread 3"<<endl; cout<<"This was draw by thread 3"<<endl; } } void ThreadFunc4(PVOID param) { while(1) { Sleep(SECOND); //out<<"This was draw by thread 4"<<endl; cout<<"This was draw by thread 4"<<endl; } } int main() { char *pstr=" 参数传递成功\n"; _beginthread(ThreadFunc1,0,pstr); _beginthread(ThreadFunc2,0,NULL); _beginthread(ThreadFunc3,0,NULL); _beginthread(ThreadFunc4,0,NULL); getch(); return 0; } #endif //#if 0