The QtConcurrent 名稱空間提供高級 API 使之可能不使用低級綫程原語，編寫多綫程程序。 更多...
| 頭： | #include <QtCore> |
| Since: | Qt 4.4 |
| class | Exception |
| class | UnhandledException |
| enum | ReduceOption { UnorderedReduce, OrderedReduce, SequentialReduce } |
| flags | ReduceOptions |
| 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) |
| void | blockingMap (Sequence & sequence , MapFunction function ) |
| void | blockingMap (Iterator begin , Iterator end , MapFunction function ) |
| T | blockingMapped (const Sequence & sequence , MapFunction function ) |
| T | blockingMapped (ConstIterator begin , ConstIterator end , MapFunction function ) |
| T | blockingMappedReduced (const Sequence & sequence , MapFunction mapFunction , ReduceFunction reduceFunction , QtConcurrent::ReduceOptions reduceOptions = UnorderedReduce | SequentialReduce) |
| T | blockingMappedReduced (ConstIterator begin , ConstIterator end , MapFunction mapFunction , ReduceFunction reduceFunction , QtConcurrent::ReduceOptions reduceOptions = UnorderedReduce | SequentialReduce) |
| QFuture<void> | filter (Sequence & sequence , FilterFunction filterFunction ) |
| QFuture<T> | filtered (const Sequence & sequence , FilterFunction filterFunction ) |
| QFuture<T> | filtered (ConstIterator begin , ConstIterator end , FilterFunction filterFunction ) |
| QFuture<T> | filteredReduced (const Sequence & sequence , FilterFunction filterFunction , ReduceFunction reduceFunction , QtConcurrent::ReduceOptions reduceOptions = UnorderedReduce | SequentialReduce) |
| QFuture<T> | filteredReduced (ConstIterator begin , ConstIterator end , FilterFunction filterFunction , ReduceFunction reduceFunction , QtConcurrent::ReduceOptions reduceOptions = UnorderedReduce | SequentialReduce) |
| QFuture<void> | map (Sequence & sequence , MapFunction function ) |
| QFuture<void> | map (Iterator begin , Iterator end , MapFunction function ) |
| QFuture<T> | mapped (const Sequence & sequence , MapFunction function ) |
| QFuture<T> | mapped (ConstIterator begin , ConstIterator end , MapFunction function ) |
| QFuture<T> | mappedReduced (const Sequence & sequence , MapFunction mapFunction , ReduceFunction reduceFunction , QtConcurrent::ReduceOptions reduceOptions = UnorderedReduce | SequentialReduce) |
| QFuture<T> | mappedReduced (ConstIterator begin , ConstIterator end , MapFunction mapFunction , ReduceFunction reduceFunction , QtConcurrent::ReduceOptions reduceOptions = UnorderedReduce | SequentialReduce) |
| QFuture<T> | run (Function function , ...) |
The QtConcurrent 名稱空間提供高級 API 使之可能不使用低級綫程原語，編寫多綫程程序。
見 Qt Concurrent chapter in the threading 文檔編製。
The Exception class provides a base class for exceptions that can transferred across threads. 更多...
The UnhandledException class represents an unhandled exception in a worker thread. 更多...
This enum specifies the order of which results from the map or filter function are passed to the reduce function.
| 常量 | 值 | 描述 |
|---|---|---|
QtConcurrent::UnorderedReduce
|
0x1
|
按任意次序履行縮減。 |
QtConcurrent::OrderedReduce
|
0x2
|
Reduction is done in the order of the original sequence. |
QtConcurrent::SequentialReduce
|
0x4
|
Reduction is done sequentially: only one thread will enter the reduce function at a time. (Parallel reduction might be supported in a future version of Qt Concurrent.) |
The ReduceOptions type is a typedef for QFlags <ReduceOption>. It stores an OR combination of ReduceOption values.
調用 filterFunction once for each item in sequence 。若 filterFunction returns true, the item is kept in sequence ; otherwise, the item is removed from sequence .
注意： 此函數將阻塞，直到已處理所有序列項。
調用 filterFunction once for each item in sequence and returns a new Sequence of kept items. If filterFunction returns true, a copy of the item is put in the new Sequence. Otherwise, the item will not appear in the new Sequence.
注意： 此函數將阻塞，直到已處理所有序列項。
另請參閱 filtered ().
調用 filterFunction once for each item from begin to end and returns a new Sequence of kept items. If filterFunction returns true, a copy of the item is put in the new Sequence. Otherwise, the item will not appear in the new Sequence.
注意： 此函數將阻塞，直到迭代器到達正處理序列的末尾。
另請參閱 filtered ().
調用 filterFunction once for each item in sequence 。若 filterFunction returns true for an item, that item is then passed to reduceFunction . In other words, the return value is the result of reduceFunction for each item where filterFunction returns true.
Note that while filterFunction is called concurrently, only one thread at a time will call reduceFunction . The order in which reduceFunction is called is undefined if reduceOptions is QtConcurrent::UnorderedReduce 。若 reduceOptions is QtConcurrent::OrderedReduce , reduceFunction is called in the order of the original sequence.
注意： 此函數將阻塞，直到已處理所有序列項。
另請參閱 filteredReduced ().
調用 filterFunction once for each item from begin to end 。若 filterFunction returns true for an item, that item is then passed to reduceFunction . In other words, the return value is the result of reduceFunction for each item where filterFunction returns true.
Note that while filterFunction is called concurrently, only one thread at a time will call reduceFunction . The order in which reduceFunction is called is undefined if reduceOptions is QtConcurrent::UnorderedReduce 。若 reduceOptions is QtConcurrent::OrderedReduce ， reduceFunction is called in the order of the original sequence.
注意： 此函數將阻塞，直到迭代器到達正處理序列的末尾。
另請參閱 filteredReduced ().
調用 function once for each item in sequence 。 function is passed a reference to the item, so that any modifications done to the item will appear in sequence .
注意： 此函數將阻塞，直到已處理所有序列項。
另請參閱 map ().
調用 function once for each item from begin to end 。 function is passed a reference to the item, so that any modifications done to the item will appear in the sequence which the iterators belong to.
注意： 此函數將阻塞，直到迭代器到達正處理序列的末尾。
另請參閱 map ().
調用 function once for each item in sequence and returns a Sequence containing the results. The type of the results will match the type returned my the MapFunction.
注意： 此函數將阻塞，直到已處理所有序列項。
另請參閱 mapped ().
調用 function once for each item from begin to end and returns a container with the results. Specify the type of container as the a template argument, like this:
QList<int> ints = QtConcurrent::blockingMapped<QList<int> >(beginIterator, endIterator, fn);
注意： 此函數將阻塞，直到迭代器到達正處理序列的末尾。
另請參閱 mapped ().
調用 mapFunction once for each item in sequence . The return value of each mapFunction 被傳遞給 reduceFunction .
Note that while mapFunction is called concurrently, only one thread at a time will call reduceFunction . The order in which reduceFunction is called is determined by reduceOptions .
注意： 此函數將阻塞，直到已處理所有序列項。
另請參閱 mapped ().
調用 mapFunction once for each item from begin to end . The return value of each mapFunction 被傳遞給 reduceFunction .
Note that while mapFunction is called concurrently, only one thread at a time will call reduceFunction . The order in which reduceFunction is called is undefined.
注意： 此函數將阻塞，直到迭代器到達正處理序列的末尾。
另請參閱 blockingMappedReduced ().
調用 filterFunction once for each item in sequence 。若 filterFunction returns true, the item is kept in sequence ; otherwise, the item is removed from sequence .
調用 filterFunction once for each item in sequence and returns a new Sequence of kept items. If filterFunction returns true, a copy of the item is put in the new Sequence. Otherwise, the item will not appear in the new Sequence.
調用 filterFunction once for each item from begin to end and returns a new Sequence of kept items. If filterFunction returns true, a copy of the item is put in the new Sequence. Otherwise, the item will not appear in the new Sequence.
調用 filterFunction once for each item in sequence 。若 filterFunction returns true for an item, that item is then passed to reduceFunction . In other words, the return value is the result of reduceFunction for each item where filterFunction returns true.
Note that while filterFunction is called concurrently, only one thread at a time will call reduceFunction . The order in which reduceFunction is called is undefined if reduceOptions is QtConcurrent::UnorderedReduce 。若 reduceOptions is QtConcurrent::OrderedReduce , reduceFunction is called in the order of the original sequence.
調用 filterFunction once for each item from begin to end 。若 filterFunction returns true for an item, that item is then passed to reduceFunction . In other words, the return value is the result of reduceFunction for each item where filterFunction returns true.
Note that while filterFunction is called concurrently, only one thread at a time will call reduceFunction . The order in which reduceFunction is called is undefined if reduceOptions is QtConcurrent::UnorderedReduce 。若 reduceOptions is QtConcurrent::OrderedReduce ， reduceFunction is called in the order of the original sequence.
調用 function once for each item in sequence 。 function is passed a reference to the item, so that any modifications done to the item will appear in sequence .
調用 function once for each item from begin to end 。 function is passed a reference to the item, so that any modifications done to the item will appear in the sequence which the iterators belong to.
調用 function once for each item in sequence and returns a future with each mapped item as a result. You can use QFuture::const_iterator or QFutureIterator to iterate through the results.
調用 function once for each item from begin to end and returns a future with each mapped item as a result. You can use QFuture::const_iterator or QFutureIterator to iterate through the results.
調用 mapFunction once for each item in sequence . The return value of each mapFunction 被傳遞給 reduceFunction .
Note that while mapFunction is called concurrently, only one thread at a time will call reduceFunction . The order in which reduceFunction is called is determined by reduceOptions .
調用 mapFunction once for each item from begin to end . The return value of each mapFunction 被傳遞給 reduceFunction .
Note that while mapFunction is called concurrently, only one thread at a time will call reduceFunction . By default, the order in which reduceFunction is called is undefined.
注意： QtConcurrent::OrderedReduce results in the ordered reduction.
運行 function in a separate thread. The thread is taken from the global QThreadPool . Note that the function may not run immediately; the function will only be run when a thread is available.
T is the same type as the return value of function . Non-void return values can be accessed via the QFuture::result () 函數。
注意， QFuture returned by QtConcurrent::run() does not support canceling, pausing, or progress reporting. The QFuture returned can only be used to query for the running/finished status and the return value of the function.
