QtConcurrent非常用方法

QtConcurrent高级API：Filter,Map与并行操作详解

最新推荐文章于 2025-12-14 21:22:24 发布

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#Qt #c++ #算法

本文介绍了QtConcurrent命名空间下的高级API，如Filter用于多线程过滤序列，blockingFilter与filtered的区别，以及map接口的映射功能。重点讲解了阻塞操作和并行计算的实现，如filteredReduced和run方法的应用。

QtConcurrent 命名空间下高级API

Filter

void blockingFilter(Sequence &sequence, FilterFunction filterFunction)
Sequence blockingFiltered(const Sequence &sequence, FilterFunction filterFunction)
Sequence blockingFiltered(ConstIterator begin, ConstIterator end, FilterFunction filterFunction)

T blockingFilteredReduced(const Sequence &sequence, FilterFunction filterFunction, ReduceFunction reduceFunction, QtConcurrent::ReduceOptions reduceOptions = UnorderedReduce | SequentialReduce)

T blockingFilteredReduced(ConstIterator begin, ConstIterator end, FilterFunction filterFunction, ReduceFunction reduceFunction, QtConcurrent::ReduceOptions reduceOptions = UnorderedReduce | SequentialReduce)

QFuture filter(Sequence &sequence, FilterFunction filterFunction)

QFuture filtered(const Sequence &sequence, FilterFunction filterFunction)

QFuture filtered(ConstIterator begin, ConstIterator end, FilterFunction filterFunction)

QFuture filteredReduced(const Sequence &sequence, FilterFunction filterFunction, ReduceFunction reduceFunction, QtConcurrent::ReduceOptions reduceOptions = UnorderedReduce | SequentialReduce)

QFuture filteredReduced(ConstIterator begin, ConstIterator end, FilterFunction filterFunction, ReduceFunction reduceFunction, QtConcurrent::ReduceOptions reduceOptions = UnorderedReduce | SequentialReduce)

filteredReduced（ConstIterator begin， ConstIterator end， FilterFunction filterFunction， ReduceFunction reduceFunction， QtConcurrent：：ReduceOptions reduceOptions = UnorderedReduce |顺序减少）

原本就是过滤器接口， Sequence 可以是QList<> QVector<>, 通过过滤器接口进行多线程过滤，经过第二个参数的function运算后，返回true的保留，否则去除。

blocking 表示阻塞的
后面加ed表示不动原来的容器，重新返回个满足条件的
reduced 后面再经过reduceFunction 运算，最后返回一个值。