Cancelled returns a cancelled context.

Deadline returns a context with a deadline.

New returns a new cancellable context.

Next returns a child context.

NextDeadline returns a child context with a deadline.

NextTimeout returns a child context with a timeout.

No returns a non-cancellable background context.

Std returns a standard library context from an async one.

Timeout returns a context with a timeout.

Callback is called when the context is cancelled.

CancelContext is a cancellable async context.

Context is an async cancellation context.