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| Control.Concurrent.STM.TChan | | Portability | non-portable (requires STM) | | Stability | experimental | | Maintainer | libraries@haskell.org |
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| Description |
| TChan: Transactional channels
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| Synopsis |
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| TChans
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| data TChan a |
| TChan is an abstract type representing an unbounded FIFO channel.
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| newTChan :: STM (TChan a) |
| Build and returns a new instance of TChan
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| newTChanIO :: IO (TChan a) |
| IO version of newTChan. This is useful for creating top-level
TChans using unsafePerformIO, because using
atomically inside unsafePerformIO isn't
possible.
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| readTChan :: TChan a -> STM a |
| Read the next value from the TChan.
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| writeTChan :: TChan a -> a -> STM () |
| Write a value to a TChan.
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| dupTChan :: TChan a -> STM (TChan a) |
| Duplicate a TChan: the duplicate channel begins empty, but data written to
either channel from then on will be available from both. Hence this creates
a kind of broadcast channel, where data written by anyone is seen by
everyone else.
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| unGetTChan :: TChan a -> a -> STM () |
| Put a data item back onto a channel, where it will be the next item read.
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| isEmptyTChan :: TChan a -> STM Bool |
| Returns True if the supplied TChan is empty.
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| Produced by Haddock version 0.8 |
