diff options
Diffstat (limited to 'src/concurrent/qtconcurrentmap.cpp')
| -rw-r--r-- | src/concurrent/qtconcurrentmap.cpp | 34 |
1 files changed, 8 insertions, 26 deletions
diff --git a/src/concurrent/qtconcurrentmap.cpp b/src/concurrent/qtconcurrentmap.cpp index da2a601ae2..fc904a4d59 100644 --- a/src/concurrent/qtconcurrentmap.cpp +++ b/src/concurrent/qtconcurrentmap.cpp @@ -68,14 +68,10 @@ */ /*! - \headerfile <QtConcurrentMap> + \page qtconcurrentmap.html \title Concurrent Map and Map-Reduce \ingroup thread - \brief The <QtConcurrentMap> header provides concurrent Map and MapReduce. - - These functions are a part of the \l {Qt Concurrent} framework. - The QtConcurrent::map(), QtConcurrent::mapped() and QtConcurrent::mappedReduced() functions run computations in parallel on the items in a sequence such as a QList or a QVector. QtConcurrent::map() @@ -83,6 +79,8 @@ sequence containing the modified content, and QtConcurrent::mappedReduced() returns a single result. + These functions are a part of the \l {Qt Concurrent} framework. + Each of the above functions has a blocking variant that returns the final result instead of a QFuture. You use them in the same way as the asynchronous variants. @@ -204,15 +202,11 @@ \section2 Using Bound Function Arguments - Note that Qt does not provide support for bound functions. This is - provided by 3rd party libraries like - \l{http://www.boost.org/libs/bind/bind.html}{Boost} or - \l{http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2005/n1836.pdf}{C++ - TR1 Library Extensions}. - If you want to use a map function that takes more than one argument you can - use boost::bind() or std::tr1::bind() to transform it onto a function that - takes one argument. + use std::bind() to transform it onto a function that takes one argument. If + C++11 support is not available, \l{http://www.boost.org/libs/bind/bind.html} + {boost::bind()} or \l{http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2005/n1836.pdf} + {std::tr1::bind()} are suitable replacements. As an example, we'll use QImage::scaledToWidth(): @@ -226,7 +220,7 @@ \snippet code/src_concurrent_qtconcurrentmap.cpp 11 - The return value from boost::bind() is a function object (functor) with + The return value from std::bind() is a function object (functor) with the following signature: \snippet code/src_concurrent_qtconcurrentmap.cpp 12 @@ -239,7 +233,6 @@ /*! \fn QFuture<void> QtConcurrent::map(Sequence &sequence, MapFunction function) - \relates <QtConcurrentMap> Calls \a function once for each item in \a sequence. The \a function is passed a reference to the item, so that any modifications done to the item @@ -248,7 +241,6 @@ /*! \fn QFuture<void> QtConcurrent::map(Iterator begin, Iterator end, MapFunction function) - \relates <QtConcurrentMap> Calls \a function once for each item from \a begin to \a end. The \a function is passed a reference to the item, so that any modifications @@ -257,7 +249,6 @@ /*! \fn QFuture<T> QtConcurrent::mapped(const Sequence &sequence, MapFunction function) - \relates <QtConcurrentMap> Calls \a function once for each item in \a sequence and returns a future with each mapped item as a result. You can use QFuture::const_iterator or @@ -266,7 +257,6 @@ /*! \fn QFuture<T> QtConcurrent::mapped(ConstIterator begin, ConstIterator end, MapFunction function) - \relates <QtConcurrentMap> Calls \a function once for each item from \a begin to \a end and returns a future with each mapped item as a result. You can use @@ -278,8 +268,6 @@ MapFunction mapFunction, ReduceFunction reduceFunction, QtConcurrent::ReduceOptions reduceOptions) - \relates <QtConcurrentMap> - Calls \a mapFunction once for each item in \a sequence. The return value of each \a mapFunction is passed to \a reduceFunction. @@ -293,8 +281,6 @@ ConstIterator end, MapFunction mapFunction, ReduceFunction reduceFunction, QtConcurrent::ReduceOptions reduceOptions) - \relates <QtConcurrentMap> - Calls \a mapFunction once for each item from \a begin to \a end. The return value of each \a mapFunction is passed to \a reduceFunction. @@ -361,8 +347,6 @@ /*! \fn T QtConcurrent::blockingMappedReduced(const Sequence &sequence, MapFunction mapFunction, ReduceFunction reduceFunction, QtConcurrent::ReduceOptions reduceOptions) - \relates <QtConcurrentMap> - Calls \a mapFunction once for each item in \a sequence. The return value of each \a mapFunction is passed to \a reduceFunction. @@ -378,8 +362,6 @@ /*! \fn T QtConcurrent::blockingMappedReduced(ConstIterator begin, ConstIterator end, MapFunction mapFunction, ReduceFunction reduceFunction, QtConcurrent::ReduceOptions reduceOptions) - \relates <QtConcurrentMap> - Calls \a mapFunction once for each item from \a begin to \a end. The return value of each \a mapFunction is passed to \a reduceFunction. |