► |  | Web Server: HTTP Server

1 | Dispatching Server
2 | Dispatchers
3 | Launching Servers
4 | Web Servers
5 | Internal APIs
6 | Troubleshooting and Tips
| Index

▼ | 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
5.9 | Miscellaneous Utilities

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

> > (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.

> > procedure

> > (start-timer-manager) → void

Handles the execution and management of timers.

> > procedure

> > (start-timer s action) → timer?

> s : number?
> action : (-> void)

Registers a timer that runs action after s seconds.

> > procedure

> > (reset-timer! t s) → void

> t : timer?
> s : number?

Changes t so that it will fire after s seconds.

> > procedure

> > (increment-timer! t s) → void

> t : timer?
> s : number?

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

> > procedure

> > (cancel-timer! t) → void

> t : timer?

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