Control.Concurrent.Classy.STM.TChan

TChan is an abstract type representing an unbounded FIFO channel.

Build and return a new instance of TChan

Create a write-only TChan. More precisely, readTChan will retry even after items have been written to the channel. The only way to read a broadcast channel is to duplicate it with dupTChan.

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.

Clone a TChan: similar to dupTChan, but the cloned channel starts with the same content available as the original channel.

Read the next value from the TChan.

A version of readTChan which does not retry. Instead it returns Nothing if no value is available.

Get the next value from the TChan without removing it, retrying if the channel is empty.

A version of peekTChan which does not retry. Instead it returns Nothing if no value is available.

Write a value to a TChan.

Put a data item back onto a channel, where it will be the next item read.

Returns True if the supplied TChan is empty.