property.py 文件源码

def get(self):
        arg = DrmModeObjGetPropertiesC()
        arg.obj_id = self.obj_id
        arg.obj_type = self.obj_type

        fcntl.ioctl(self._drm.fd, DRM_IOCTL_MODE_OBJ_GETPROPERTIES, arg)

        prop_ids = (ctypes.c_uint32*arg.count_props)()
        arg.props_ptr = ctypes.cast(ctypes.pointer(prop_ids), ctypes.c_void_p).value

        prop_values = (ctypes.c_uint64*arg.count_props)()
        arg.prop_values_ptr = ctypes.cast(ctypes.pointer(prop_values), ctypes.c_void_p).value

        fcntl.ioctl(self._drm.fd, DRM_IOCTL_MODE_OBJ_GETPROPERTIES, arg)
        self._arg = arg

        vals = [v for i, v in zip(prop_ids, prop_values) if i == self.id]

        return vals[0]