cv::AsyncArray Class Reference

Returns result of asynchronous operations. More...

#include <opencv2/core/async.hpp>

Public Member Functions
	AsyncArray () CV_NOEXCEPT
	AsyncArray (const AsyncArray &o) CV_NOEXCEPT
	~AsyncArray () CV_NOEXCEPT
void *	_getImpl () const CV_NOEXCEPT
void	get (OutputArray dst) const
bool	get (OutputArray dst, int64 timeoutNs) const
bool	get (OutputArray dst, double timeoutNs) const
AsyncArray &	operator= (const AsyncArray &o) CV_NOEXCEPT
void	release () CV_NOEXCEPT
bool	valid () const CV_NOEXCEPT
bool	wait_for (int64 timeoutNs) const
bool	wait_for (double timeoutNs) const

Protected Attributes
Impl *	p

Friends
struct	Impl

Detailed Description

Returns result of asynchronous operations.

Object has attached asynchronous state. Assignment operator doesn't clone asynchronous state (it is shared between all instances).

Result can be fetched via get() method only once.

Examples:

samples/dnn/object_detection.cpp.

Constructor & Destructor Documentation

~AsyncArray()

cv::AsyncArray::~AsyncArray

(

)

AsyncArray() [1/2]

cv::AsyncArray::AsyncArray

(

)

AsyncArray() [2/2]

cv::AsyncArray::AsyncArray

(

const AsyncArray &

o

)

Member Function Documentation

_getImpl()

void* cv::AsyncArray::_getImpl ( ) const

inline

get() [1/3]

void cv::AsyncArray::get

(

OutputArray

dst

)

const

Python:
	cv.AsyncArray.get(	[, dst]	) ->	dst
	cv.AsyncArray.get(	timeoutNs[, dst]	) ->	retval, dst

Fetch the result.

Parameters

[out]

dst

destination array

Waits for result until container has valid result. Throws exception if exception was stored as a result.

Throws exception on invalid container state.

Note

Result or stored exception can be fetched only once.

Examples:

samples/dnn/object_detection.cpp.

get() [2/3]

bool cv::AsyncArray::get	(	OutputArray	dst,
		int64	timeoutNs
	)		const

Python:
	cv.AsyncArray.get(	[, dst]	) ->	dst
	cv.AsyncArray.get(	timeoutNs[, dst]	) ->	retval, dst

Retrieving the result with timeout

Parameters

[out]	dst	destination array
[in]	timeoutNs	timeout in nanoseconds, -1 for infinite wait

Returns

true if result is ready, false if the timeout has expired

Note

Result or stored exception can be fetched only once.

get() [3/3]

bool cv::AsyncArray::get ( OutputArray  dst, double  timeoutNs  ) const

inline

Python:
	cv.AsyncArray.get(	[, dst]	) ->	dst
	cv.AsyncArray.get(	timeoutNs[, dst]	) ->	retval, dst

operator=()

AsyncArray& cv::AsyncArray::operator=

(

const AsyncArray &

o

)

release()

void cv::AsyncArray::release

(

)

Python:
	cv.AsyncArray.release(		) ->	None

valid()

bool cv::AsyncArray::valid

(

)

const

Python:
	cv.AsyncArray.valid(		) ->	retval

wait_for() [1/2]

bool cv::AsyncArray::wait_for

(

int64

timeoutNs

)

const

Python:
	cv.AsyncArray.wait_for(	timeoutNs	) ->	retval

wait_for() [2/2]

bool cv::AsyncArray::wait_for ( double  timeoutNs ) const

inline

Python:
	cv.AsyncArray.wait_for(	timeoutNs	) ->	retval

Friends And Related Function Documentation

Impl

friend struct Impl

friend

Member Data Documentation

p

Impl* cv::AsyncArray::p

protected

---

The documentation for this class was generated from the following file:

• opencv2/core/async.hpp