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106 lines
2.8 KiB
C++
106 lines
2.8 KiB
C++
3 years ago
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// This file is part of OpenCV project.
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// It is subject to the license terms in the LICENSE file found in the top-level directory
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// of this distribution and at http://opencv.org/license.html.
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#ifndef OPENCV_CORE_ASYNC_HPP
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#define OPENCV_CORE_ASYNC_HPP
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#include <opencv2/core/mat.hpp>
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#ifdef CV_CXX11
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//#include <future>
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#include <chrono>
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#endif
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namespace cv {
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/** @addtogroup core_async
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@{
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*/
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/** @brief Returns result of asynchronous operations
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Object has attached asynchronous state.
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Assignment operator doesn't clone asynchronous state (it is shared between all instances).
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Result can be fetched via get() method only once.
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*/
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class CV_EXPORTS_W AsyncArray
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{
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public:
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~AsyncArray() CV_NOEXCEPT;
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CV_WRAP AsyncArray() CV_NOEXCEPT;
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AsyncArray(const AsyncArray& o) CV_NOEXCEPT;
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AsyncArray& operator=(const AsyncArray& o) CV_NOEXCEPT;
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CV_WRAP void release() CV_NOEXCEPT;
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/** Fetch the result.
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@param[out] dst destination array
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Waits for result until container has valid result.
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Throws exception if exception was stored as a result.
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Throws exception on invalid container state.
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@note Result or stored exception can be fetched only once.
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*/
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CV_WRAP void get(OutputArray dst) const;
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/** Retrieving the result with timeout
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@param[out] dst destination array
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@param[in] timeoutNs timeout in nanoseconds, -1 for infinite wait
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@returns true if result is ready, false if the timeout has expired
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@note Result or stored exception can be fetched only once.
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*/
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bool get(OutputArray dst, int64 timeoutNs) const;
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CV_WRAP inline
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bool get(OutputArray dst, double timeoutNs) const { return get(dst, (int64)timeoutNs); }
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bool wait_for(int64 timeoutNs) const;
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CV_WRAP inline
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bool wait_for(double timeoutNs) const { return wait_for((int64)timeoutNs); }
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CV_WRAP bool valid() const CV_NOEXCEPT;
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#ifdef CV_CXX11
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inline AsyncArray(AsyncArray&& o) { p = o.p; o.p = NULL; }
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inline AsyncArray& operator=(AsyncArray&& o) CV_NOEXCEPT { std::swap(p, o.p); return *this; }
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template<typename _Rep, typename _Period>
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inline bool get(OutputArray dst, const std::chrono::duration<_Rep, _Period>& timeout)
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{
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return get(dst, (int64)(std::chrono::nanoseconds(timeout).count()));
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}
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template<typename _Rep, typename _Period>
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inline bool wait_for(const std::chrono::duration<_Rep, _Period>& timeout)
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{
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return wait_for((int64)(std::chrono::nanoseconds(timeout).count()));
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}
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#if 0
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std::future<Mat> getFutureMat() const;
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std::future<UMat> getFutureUMat() const;
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#endif
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#endif
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// PImpl
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struct Impl; friend struct Impl;
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inline void* _getImpl() const CV_NOEXCEPT { return p; }
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protected:
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Impl* p;
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};
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//! @}
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} // namespace
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#endif // OPENCV_CORE_ASYNC_HPP
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