自学教程：C++ CreateMutexW函数代码示例

    Pimpl (String name, const int timeOutMillisecs)        : handle (0), refCount (1)    {        name = name.replaceCharacter ('//', '/');        handle = CreateMutexW (0, TRUE, ("Global//" + name).toWideCharPointer());        // Not 100% sure why a global mutex sometimes can't be allocated, but if it fails, fall back to        // a local one. (A local one also sometimes fails on other machines so neither type appears to be        // universally reliable)        if (handle == 0)            handle = CreateMutexW (0, TRUE, ("Local//" + name).toWideCharPointer());        if (handle != 0 && GetLastError() == ERROR_ALREADY_EXISTS)        {            if (timeOutMillisecs == 0)            {                close();                return;            }            switch (WaitForSingleObject (handle, timeOutMillisecs < 0 ? INFINITE : timeOutMillisecs))            {            case WAIT_OBJECT_0:            case WAIT_ABANDONED:                break;            case WAIT_TIMEOUT:            default:                close();                break;            }        }    }

static BOOL winpidgin_set_running(BOOL fail_if_running) {	HANDLE h;	if ((h = CreateMutexW(NULL, FALSE, L"pidgin_is_running"))) {		DWORD err = GetLastError();		if (err == ERROR_ALREADY_EXISTS) {			if (fail_if_running) {				HWND msg_win;				printf("An instance of Pidgin is already running./n");				if((msg_win = FindWindowExW(NULL, NULL, L"WinpidginMsgWinCls", NULL)))					if(SendMessage(msg_win, PIDGIN_WM_FOCUS_REQUEST, (WPARAM) NULL, (LPARAM) NULL))						return FALSE;				/* If we get here, the focus request wasn't successful */				MessageBoxW(NULL,					L"An instance of Pidgin is already running",					NULL, MB_OK | MB_TOPMOST);				return FALSE;			}		} else if (err != ERROR_SUCCESS)			printf("Error (%u) accessing /"pidgin_is_running/" mutex./n", (UINT) err);	}	return TRUE;}

void CWE253_Incorrect_Check_of_Function_Return_Value__wchar_t_w32CreateMutex_15_bad(){    switch(6)    {    case 6:    {        HANDLE hMutex = NULL;        hMutex = CreateMutexW(NULL, FALSE, NULL);        /* FLAW: If CreateMutexW() failed, the return value will be NULL,           but we are checking to see if the return value is INVALID_HANDLE_VALUE */        if (hMutex == INVALID_HANDLE_VALUE)        {            exit(1);        }        /* We'll leave out most of the implementation since it has nothing to do with the CWE         * and since the checkers are looking for certain function calls anyway */        CloseHandle(hMutex);    }    break;    default:        /* INCIDENTAL: CWE 561 Dead Code, the code below will never run */        printLine("Benign, fixed string");        break;    }}

/****************************************************************** *  CreateAssemblyCache   ([email
C++ CreateNewResourceType函数代码示例
C++ CreateMutexA函数代码示例