5.1 Timers

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▼ | 5 | Internal APIs

5.1 | Timers
5.2 | Connection Manager
5.3 | Serializable Closures
5.4 | Cache Table
5.5 | MIME Types
5.6 | Serialization Utilities
5.7 | URL Param
5.8 | GZip

On this page:

timer
start-timer-manager
start-timer
reset-timer!
increment-timer!
cancel-timer!

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#### 5.1`` Timers

( require web-server/private/timer)

This module provides a functionality for running procedures after a given amount of time, that may be extended.

( struct |  | timer (evt expire-seconds action)
|  | #:extra-constructor-name make-timer)

evt : evt?
expire-seconds : number?
action : (-> void)

evt is an alarm-evt that is ready at expire-seconds. action should be called when this evt is ready.

( start-timer-manager) → void

Handles the execution and management of timers.

( start-timer s action) → timer?
s : number?
action : (-> void)

Registers a timer that runs action after s seconds.

( reset-timer! t s) → void
t : timer?
s : number?

Changes t so that it will fire after s seconds.

( increment-timer! t s) → void
t : timer?
s : number?

Changes t so that it will fire after s seconds from when it does now.

( cancel-timer! t) → void
t : timer?

Cancels the firing of t ever and frees resources used by t.
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