<count-down> ( n -- count-down )
Count-down latches

Next:

count-down ( count-down -- )

Vocabulary
concurrency.count-downs

Inputs

n	a non-negative integer

Outputs

count-down

a count-down

Word description
Creates a new count-down latch.

Errors
Throws an error if the count is lower than zero.

Definition

USING: concurrency.promises kernel math ;

IN: concurrency.count-downs

: <count-down> ( n -- count-down )
    dup 0 < [ invalid-count-down-count ] when
    <promise> \ count-down-tuple boa dup count-down-check ;