From: Eli Zaretskii <eliz@gnu.org>
Date: Fri, 23 Sep 2016 08:43:25 +0000 (+0300)
Subject: Document 'timerp'
X-Git-Tag: emacs-25.1.90~171
X-Git-Url: http://git.eshelyaron.com/gitweb/?a=commitdiff_plain;h=0ae9a816b9f68bd3f50fc287a342237c8b4fe78d;p=emacs.git

Document 'timerp'

* doc/lispref/os.texi (Timers): Document 'timerp'.  (Bug#24511)
Improve indexing.
---

diff --git a/doc/lispref/os.texi b/doc/lispref/os.texi
index ec14b014e52..0d999ae9b99 100644
--- a/doc/lispref/os.texi
+++ b/doc/lispref/os.texi
@@ -1727,10 +1727,17 @@ This function returns @code{t} if @var{year} is a leap year.
 
 @node Timers
 @section Timers for Delayed Execution
-@cindex timer
+@cindex timers
 
   You can set up a @dfn{timer} to call a function at a specified
-future time or after a certain length of idleness.
+future time or after a certain length of idleness.  A timer is a
+special object that stores the information about the next invocation
+times and the function to invoke.
+
+@defun timerp object
+This predicate function returns non-@code{nil} of @code{object} is a
+timer.
+@end defun
 
   Emacs cannot run timers at any arbitrary point in a Lisp program; it
 can run them only when Emacs could accept output from a subprocess: