Я хочу передать переменные HANDLE и HWND в функцию _beginthreadex, я не хочу устанавливать эти переменные глобальными.
вот что я пробовал:
int APIENTRY WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPTSTR
lpCmdLine, int nShowCmd)
{
HANDLE t = NULL;
HWND wnd = NULL;
// initialization of wnd and t by their functions
PVOID args[2];
args[0] = &t;
args[1] = &wnd;
_beginthreadex(NULL, 0, threadfunc, args, NULL,NULL,NULL);
// doing some additional stuff
return 0;
}
unsigned int __stdcall threadfunc(PVOID args){
waitforsingleobject(*(PHANDLE)args[0], INFINITE);
EnableWindow((PHWND)args[1]) ;
return 0;
}
это, к сожалению, не работает .. идеи?
Это не работает, потому что вы не читаете тип args
правильно. Вам нужно что-то более похожее на это:
int APIENTRY WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPTSTR
lpCmdLine, int nShowCmd)
{
HANDLE t = NULL;
HWND wnd = NULL;
// initialization of wnd and t by their functions
void* args[2];
args[0] = &t;
args[1] = &wnd;
_beginthreadex(NULL, 0, threadfunc, args, NULL, NULL, NULL);
// doing some additional stuff
// make sure args, t and wnd don't go out of scope before the thread terminates...
return 0;
}
unsigned int __stdcall threadfunc(PVOID args)
{
void **pargs = (void**) args;
HANDLE t = * (HANDLE*) pargs[0];
HWND wnd = * (HWND*) pargs[1];
WaitForSingleObject(t, INFINITE);
EnableWindow(wnd, TRUE);
return 0;
}
Или, используя динамическое распределение:
int APIENTRY WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPTSTR
lpCmdLine, int nShowCmd)
{
HANDLE t = NULL;
HWND wnd = NULL;
// initialization of wnd and t by their functions
void **args = new void*[2];
args[0] = &t;
args[1] = &wnd;
if (!_beginthreadex(NULL, 0, threadfunc, args, NULL, NULL, NULL))
delete[] args;
// doing some additional stuff
// make sure t and wnd don't go out of scope before the thread terminates...
return 0;
}
unsigned int __stdcall threadfunc(PVOID args)
{
void **pargs = (void**) args;
HANDLE t = * (HANDLE*) pargs[0];
HWND wnd = * (HWND*) pargs[1];
WaitForSingleObject(t, INFINITE);
EnableWindow(wnd, TRUE);
delete[] pargs;
return 0;
}
Лучшее решение — использовать структуру вместо массива:
struct MyHandles
{
HANDLE t;
HWND wnd;
};
int APIENTRY WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPTSTR
lpCmdLine, int nShowCmd)
{
HANDLE t = NULL;
HWND wnd = NULL;
// initialization of wnd and t by their functions
MyHandles arg;
arg.t = t;
arg.wnd = wnd;
_beginthreadex(NULL, 0, threadfunc, &arg, NULL, NULL, NULL);
// doing some additional stuff
// make sure arg doesn't go out of scope before the thread terminates...
return 0;
}
unsigned int __stdcall threadfunc(PVOID args)
{
MyHandles *parg = (MyHandles*) args;
WaitForSingleObject(parg->t, INFINITE);
EnableWindow(parg->wnd, TRUE);
return 0;
}
Или, используя динамическое распределение:
struct MyHandles
{
HANDLE t;
HWND wnd;
};
int APIENTRY WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPTSTR
lpCmdLine, int nShowCmd)
{
HANDLE t = NULL;
HWND wnd = NULL;
// initialization of wnd and t by their functions
MyHandles *arg = new MyHandles;
arg->t = t;
arg->wnd = wnd;
if (!_beginthreadex(NULL, 0, threadfunc, arg, NULL, NULL, NULL))
delete arg;
// doing some additional stuff
return 0;
}
unsigned int __stdcall threadfunc(PVOID args)
{
MyHandles *parg = (MyHandles*) args;
WaitForSingleObject(parg->t, INFINITE);
EnableWindow(parg->wnd, TRUE);
delete parg;
return 0;
}
Других решений пока нет …