add_timer(9) [centos man page]

ADD_TIMER(9)							   Driver Basics						      ADD_TIMER(9)

NAME

       add_timer - start a timer

SYNOPSIS

       void add_timer(struct timer_list * timer);

ARGUMENTS

       timer
	   the timer to be added

DESCRIPTION

       The kernel will do a ->function(->data) callback from the timer interrupt at the ->expires point in the future. The current time is
       'jiffies'.

       The timer's ->expires, ->function (and if the handler uses it, ->data) fields must be set prior calling this function.

       Timers with an ->expires field in the past will be executed in the next timer tick.

COPYRIGHT

Kernel Hackers Manual 3.10					     June 2014							      ADD_TIMER(9)

pods::SDL::Time(3pm)					User Contributed Perl Documentation				      pods::SDL::Time(3pm)

NAME

       SDL::Time - An SDL Perl extension for managing timers

CATEGORY

       Core

SYNOPSIS

	use warnings;
	use strict;

	use threads;
	use threads::shared;

	use SDL::Time;

	package foo;

	use SDL ':all';

	SDL::init(SDL_INIT_TIMER);

	my $tick :shared = 0;
	sub ticker { $tick++; warn $tick; return 100; }

	package main;

	my $id = SDL::Time::add_timer(100, 'foo::ticker');

	sleep(2);

	SDL::Time::remove_timer($id);

METHODS

   add_timer
	my $id = SDL::Timer::add_timer( $ms_interval, $callback );

       This runs in a separate thread and a cloned Perl thread.  "threads" and "threads::shared" must be used to share any variables the timer
       uses.

       The $callback function, specified with a string of the function's name, will be called after the milliseconds of $interval have elapsed.
       The actual delay may be longer than specified depending on the underlying OS.  The callback function is passed the current timer interval
       as well as the $interval parameter and should return the next timer interval.  If the return value from the callback is 0, the timer is
       cancelled; otherwise, the timer will continue to run.

       The timer callback function may run in a different thread to your main program, so it shouldn't call any functions from within itself.  You
       may call SDL::push_event, however.

       "SDL::Time::add_timer" returns the identifier value of the generated timer or undef on error.

       Note: You must initialize ("SDL::init") the timer subsystem to use this function.

   remove_timer
	SDL::Timer::remove_timer( $id );

       The other way to cancel a timer is to use "SDL::Time::remove_timer" on the $id of a timer.  This ID is the return value of the
       "SDL::Time::add_timer" function.

       "SDL::Time::remove_timer" returns 0 on success or "-1" on error.

AUTHORS

       See "AUTHORS" in SDL.

perl v5.14.2							    2012-05-28						      pods::SDL::Time(3pm)