close_all_framegrabbersclose_all_framegrabbersclose_all_framegrabbersCloseAllFramegrabbersCloseAllFramegrabbers (Operator)

Name

close_all_framegrabbersclose_all_framegrabbersclose_all_framegrabbersCloseAllFramegrabbersCloseAllFramegrabbers — Close all image acquisition devices.

Signature

Description

The operator close_all_framegrabbersclose_all_framegrabbersclose_all_framegrabbersCloseAllFramegrabbersCloseAllFramegrabbers closes all currently open image acquisition devices. It is used to cope with deadlocks resulting from damaged image acquisition handles (in that case the use of close_framegrabberclose_framegrabberclose_framegrabberCloseFramegrabberCloseFramegrabber is impossible).

Attention

close_all_framegrabbersclose_all_framegrabbersclose_all_framegrabbersCloseAllFramegrabbersCloseAllFramegrabbers exists solely for the purpose of implementing the “reset program” functionality in HDevelop. close_all_framegrabbersclose_all_framegrabbersclose_all_framegrabbersCloseAllFramegrabbersCloseAllFramegrabbers must not be used in any application.

Parallelization

• Multithreading type: exclusive (runs in parallel only with independent operators).
• Multithreading scope: local (may only be called from the same thread in which the window, model, or tool instance was created).
• Processed without parallelization.

Result

If it is possible to close all image acquisition devices, the operator close_all_framegrabbersclose_all_framegrabbersclose_all_framegrabbersCloseAllFramegrabbersCloseAllFramegrabbers returns the value 2 (H_MSG_TRUE). Otherwise an exception is raised.

Possible Predecessors

grab_imagegrab_imagegrab_imageGrabImageGrabImage, grab_image_asyncgrab_image_asyncgrab_image_asyncGrabImageAsyncGrabImageAsync

See also

open_framegrabberopen_framegrabberopen_framegrabberOpenFramegrabberOpenFramegrabber

Module

Foundation