class

D4::WriteControl

Inherits Reference < Object

Coordinates progress reporting and cooperative cancellation for D4 writes.

A control may be cancelled from another fiber or thread. Callbacks run in the fiber performing the write and should return quickly.

Constructors

new(on_progress : Proc(WriteProgress, Nil) | Nil = nil)
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new
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Instance methods

cancel

Requests cancellation. The operation stops at its next checkpoint.

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cancelled?
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check!

Raises CancelledError when cancellation has been requested.

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update(progress : WriteProgress) : Nil

Emits a progress snapshot after checking for cancellation.

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