For most applications one should use Pipe instead of Stream.

Clock includes functions to create deferreds that become determined at a certain time.

When RECORD_ASYNC_BACKTRACES is set, the Async scheduler records a backtrace everytime it schedules a job, and will include the backtrace history in any exceptions raised to monitors, and in particular, in an unhandled exception that reaches the main monitor.

A deferred is a value that will become determined asynchronously.

Events is for keeping a set of events that need to happen in the future.

A handler is a continuation that captures the current async execution context.

An ivar is a write-once cell that can be empty or full (i.e.

length t returns the number of waiting jobs

A monitor is a context that determines what to do when there is an unhandled exception.

A pipe is a buffered FIFO communication channel.

A tail is a pointer to the end of a stream that can be used to extend the stream.

Throttles for simultaneous computations.