static PyObject *
overlapped_cancel(OverlappedObject *self)
{
BOOL res = TRUE;
if (self->pending) {
Py_BEGIN_ALLOW_THREADS
if (check_CancelIoEx())
res = Py_CancelIoEx(self->handle, &self->overlapped);
else
res = CancelIo(self->handle);
Py_END_ALLOW_THREADS
}
static PyObject *
_winapi_Overlapped_cancel_impl(OverlappedObject *self)
/*[clinic end generated code: output=fcb9ab5df4ebdae5 input=cbf3da142290039f]*/
{
BOOL res = TRUE;
if (self->pending) {
Py_BEGIN_ALLOW_THREADS
if (check_CancelIoEx())
res = Py_CancelIoEx(self->handle, &self->overlapped);
else
res = CancelIo(self->handle);
Py_END_ALLOW_THREADS
}
static void
Overlapped_dealloc(OverlappedObject *self)
{
DWORD bytes;
DWORD olderr = GetLastError();
BOOL wait = FALSE;
BOOL ret;
if (!HasOverlappedIoCompleted(&self->overlapped) &&
self->type != TYPE_NOT_STARTED)
{
if (Py_CancelIoEx && Py_CancelIoEx(self->handle, &self->overlapped))
wait = TRUE;
Py_BEGIN_ALLOW_THREADS
ret = GetOverlappedResult(self->handle, &self->overlapped,
&bytes, wait);
Py_END_ALLOW_THREADS
switch (ret ? ERROR_SUCCESS : GetLastError()) {
case ERROR_SUCCESS:
case ERROR_NOT_FOUND:
case ERROR_OPERATION_ABORTED:
break;
default:
PyErr_Format(
PyExc_RuntimeError,
"%R still has pending operation at "
"deallocation, the process may crash", self);
PyErr_WriteUnraisable(NULL);
}
}
if (self->overlapped.hEvent != NULL)
CloseHandle(self->overlapped.hEvent);
switch (self->type) {
case TYPE_READ:
case TYPE_ACCEPT:
Py_CLEAR(self->allocated_buffer);
break;
case TYPE_WRITE:
case TYPE_READINTO:
if (self->user_buffer.obj)
PyBuffer_Release(&self->user_buffer);
break;
}
PyObject_Del(self);
SetLastError(olderr);
}
static PyObject *
Overlapped_cancel(OverlappedObject *self)
{
BOOL ret = TRUE;
if (self->type == TYPE_NOT_STARTED
|| self->type == TYPE_WAIT_NAMED_PIPE_AND_CONNECT)
Py_RETURN_NONE;
if (!HasOverlappedIoCompleted(&self->overlapped)) {
Py_BEGIN_ALLOW_THREADS
if (Py_CancelIoEx)
ret = Py_CancelIoEx(self->handle, &self->overlapped);
else
ret = CancelIo(self->handle);
Py_END_ALLOW_THREADS
}
static void
overlapped_dealloc(OverlappedObject *self)
{
DWORD bytes;
int err = GetLastError();
if (self->pending) {
if (check_CancelIoEx() &&
Py_CancelIoEx(self->handle, &self->overlapped) &&
GetOverlappedResult(self->handle, &self->overlapped, &bytes, TRUE))
{
/* The operation is no longer pending -- nothing to do. */
}
else if (_Py_Finalizing == NULL)
{
/* The operation is still pending -- give a warning. This
will probably only happen on Windows XP. */
PyErr_SetString(PyExc_RuntimeError,
"I/O operations still in flight while destroying "
"Overlapped object, the process may crash");
PyErr_WriteUnraisable(NULL);
}
else
{
/* The operation is still pending, but the process is
probably about to exit, so we need not worry too much
about memory leaks. Leaking self prevents a potential
crash. This can happen when a daemon thread is cleaned
up at exit -- see #19565. We only expect to get here
on Windows XP. */
CloseHandle(self->overlapped.hEvent);
SetLastError(err);
return;
}
}
CloseHandle(self->overlapped.hEvent);
SetLastError(err);
if (self->write_buffer.obj)
PyBuffer_Release(&self->write_buffer);
Py_CLEAR(self->read_buffer);
PyObject_Del(self);
}
static void
overlapped_dealloc(OverlappedObject *self)
{
DWORD bytes;
int err = GetLastError();
if (self->pending) {
/* make it a programming error to deallocate while operation
is pending, even if we can safely cancel it */
if (check_CancelIoEx() &&
Py_CancelIoEx(self->handle, &self->overlapped))
GetOverlappedResult(self->handle, &self->overlapped, &bytes, TRUE);
PyErr_SetString(PyExc_RuntimeError,
"I/O operations still in flight while destroying "
"Overlapped object, the process may crash");
PyErr_WriteUnraisable(NULL);
}
CloseHandle(self->overlapped.hEvent);
SetLastError(err);
if (self->write_buffer.obj)
PyBuffer_Release(&self->write_buffer);
Py_CLEAR(self->read_buffer);
PyObject_Del(self);
}
