| // This file is part of OpenCV project. | |
| // It is subject to the license terms in the LICENSE file found in the top-level directory | |
| // of this distribution and at http://opencv.org/license.html. | |
| // | |
| // Copyright (C) 2019 Intel Corporation | |
| namespace cv { | |
| namespace gapi{ | |
| /** | |
| * @brief This namespace contains experimental G-API functionality, | |
| * functions or structures in this namespace are subjects to change or | |
| * removal in the future releases. This namespace also contains | |
| * functions which API is not stabilized yet. | |
| */ | |
| namespace wip { | |
| /** | |
| * @brief A class to group async requests to cancel them in a single shot. | |
| * | |
| * GAsyncContext is passed as an argument to async() and async_apply() functions | |
| */ | |
| class GAPI_EXPORTS GAsyncContext{ | |
| std::atomic<bool> cancelation_requested = {false}; | |
| public: | |
| /** | |
| * @brief Start cancellation process for an associated request. | |
| * | |
| * User still has to wait for each individual request (either via callback or according std::future object) to make sure it actually canceled. | |
| * | |
| * @return true if it was a first request to cancel the context | |
| */ | |
| bool cancel(); | |
| /** | |
| * @brief Returns true if cancellation was requested for this context. | |
| * | |
| * @return true if cancellation was requested for this context | |
| */ | |
| bool isCanceled() const; | |
| }; | |
| class GAPI_EXPORTS GAsyncCanceled : public std::exception { | |
| public: | |
| virtual const char* what() const noexcept CV_OVERRIDE; | |
| }; | |
| } // namespace wip | |
| } // namespace gapi | |
| } // namespace cv | |