Window内核对象编程示例代码

#include <windows.h> #include <stdio.h> #define THREADCOUNT 2 HANDLE ghMutex; DWORD WINAPI WriteToDatabase( LPVOID ); void main() { HANDLE aThread[THREADCOUNT]; DWORD ThreadID; int i; // Create a mutex with no initial owner ghMutex = CreateMutex( NULL, // default security attributes FALSE, // initially not owned NULL); // unnamed mutex if (ghMutex == NULL) { printf("CreateMutex error: %d/n", GetLastError()); return; } // Create worker threads for( i=0; i < THREADCOUNT; i++ ) { aThread[i] = CreateThread( NULL, // default security attributes 0, // default stack size (LPTHREAD_START_ROUTINE) WriteToDatabase, //LPTHREAD_START_ROUTINE指向回调函数，必须由宿主应用程序的编写实现 NULL, // no thread function arguments 0, // default creation flags &ThreadID); // receive thread identifier if( aThread[i] == NULL ) { printf("CreateThread error: %d/n", GetLastError()); return; } } // Wait for all threads to terminate WaitForMultipleObjects(THREADCOUNT, aThread, TRUE, INFINITE); // Close thread and mutex handles for( i=0; i < THREADCOUNT; i++ ) CloseHandle(aThread[i]); CloseHandle(ghMutex); } DWORD WINAPI WriteToDatabase( LPVOID lpParam ) { DWORD dwCount=0, dwWaitResult; // Request ownership of mutex. while( dwCount < 20 ) { dwWaitResult = WaitForSingleObject( ghMutex, // handle to mutex INFINITE); // no time-out interval switch (dwWaitResult) { // The thread got ownership of the mutex case WAIT_OBJECT_0: __try { // TODO: Write to the database printf("Thread %d writing to database.../n", GetCurrentThreadId()); dwCount++; } __finally { // Release ownership of the mutex object if (! ReleaseMutex(ghMutex)) { // Deal with error. } } break; // The thread got ownership of an abandoned mutex case WAIT_ABANDONED: return FALSE; } } return TRUE; }