64 lines
1.8 KiB
C++
64 lines
1.8 KiB
C++
|
// 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
|
||
|
|
|
||
|
|
#ifndef OPENCV_GAPI_GASYNC_CONTEXT_HPP
|
||
|
|
#define OPENCV_GAPI_GASYNC_CONTEXT_HPP
|
||
|
|
|
||
|
|
#if !defined(GAPI_STANDALONE)
|
||
|
|
# include <opencv2/core/cvdef.h>
|
||
|
|
#else // Without OpenCV
|
||
|
|
# include <opencv2/gapi/own/cvdefs.hpp>
|
||
|
|
#endif // !defined(GAPI_STANDALONE)
|
||
|
|
|
||
|
|
#include <opencv2/gapi/own/exports.hpp>
|
||
|
|
|
||
|
|
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
|
||
|
|
|
||
|
|
#endif //OPENCV_GAPI_GASYNC_CONTEXT_HPP
|