comment on

You didn't try, did you?

use strict;
use warnings 'all';

sub mfork ($$&) {
    my ($count, $max, $code) = @_;

    foreach my $c (1 .. $count) {
        wait unless $c <= $max;
        die "Fork failed: $!\n" unless defined (my $pid = fork);
        exit $code -> ($c) unless $pid;
    }

    1 until -1 == wait;
}


mfork 10, 3, sub {
    print "$$: " . localtime () . ": Starting\n";
    select undef, undef, undef, 2 + rand 2;
    print "$$: " . localtime () . ": Exiting\n";
};
__END__
972: Wed Oct  2 16:06:32 2002: Starting
973: Wed Oct  2 16:06:32 2002: Starting
974: Wed Oct  2 16:06:32 2002: Starting
973: Wed Oct  2 16:06:34 2002: Exiting
975: Wed Oct  2 16:06:34 2002: Starting
972: Wed Oct  2 16:06:35 2002: Exiting
976: Wed Oct  2 16:06:35 2002: Starting
974: Wed Oct  2 16:06:35 2002: Exiting
977: Wed Oct  2 16:06:35 2002: Starting
975: Wed Oct  2 16:06:38 2002: Exiting
978: Wed Oct  2 16:06:38 2002: Starting
977: Wed Oct  2 16:06:39 2002: Exiting
979: Wed Oct  2 16:06:39 2002: Starting
976: Wed Oct  2 16:06:39 2002: Exiting
980: Wed Oct  2 16:06:39 2002: Starting
978: Wed Oct  2 16:06:41 2002: Exiting
981: Wed Oct  2 16:06:41 2002: Starting
979: Wed Oct  2 16:06:41 2002: Exiting
980: Wed Oct  2 16:06:42 2002: Exiting
981: Wed Oct  2 16:06:45 2002: Exiting
[download]

Please consult the perlref manual page for syntax details dealing with references.

Abigail

In reply to Re: Limiting the number of forks by Abigail-II
in thread Limiting the number of forks by c

Are you posting in the right place? Check out Where do I post X? to know for sure.
Posts may use any of the Perl Monks Approved HTML tags. Currently these include the following:
<code> <a> <b> <big> <blockquote> <br /> <dd> <dl> <dt> <em> <font> <h1> <h2> <h3> <h4> <h5> <h6> <hr /> <i> <li> <nbsp> <ol> <p> <small> <strike> <strong> <sub> <sup> <table> <td> <th> <tr> <tt> <u> <ul>
Snippets of code should be wrapped in <code> tags not <pre> tags. In fact, <pre> tags should generally be avoided. If they must be used, extreme care should be taken to ensure that their contents do not have long lines (<70 chars), in order to prevent horizontal scrolling (and possible janitor intervention).
Want more info? How to link or How to display code and escape characters are good places to start.


go ahead... be a heretic
	PerlMonks