[p5sagit/p5-mst-13.2.git] / lib / cacheout.pl

#!/usr/bin/perl

# Open in their package.

sub cacheout'open {
    open($_[0], $_[1]);
}

# But only this sub name is visible to them.

sub cacheout {
    package cacheout;

    ($file) = @_;
    ($package) = caller;
    if (!$isopen{$file}) {
	if (++$numopen > $maxopen) {
	    sub byseq {$isopen{$a} != $isopen{$b};}
	    local(@lru) = sort byseq keys(%isopen);
	    splice(@lru, $maxopen / 3);
	    $numopen -= @lru;
	    for (@lru) { close $_; delete $isopen{$_}; }
	}
	&open($file, ($saw{$file}++ ? '>>' : '>') . $file)
	    || die "Can't create $file: $!\n";
    }
    $isopen{$file} = ++$seq;
}

package cacheout;

$seq = 0;
$numopen = 0;

if (open(PARAM,'/usr/include/sys/param.h')) {
    local($.);
    while (<PARAM>) {
	$maxopen = $1 - 4 if /^#define NOFILE\s+(\d+)/;
    }
    close PARAM;
}
$maxopen = 16 unless $maxopen;

1;
Commit	Line	Data
39c3038c	1	#!/usr/bin/perl
	2
	3	# Open in their package.
	4
	5	sub cacheout'open {
	6	open($_[0], $_[1]);
	7	}
	8
	9	# But only this sub name is visible to them.
	10
	11	sub cacheout {
	12	package cacheout;
	13
	14	($file) = @_;
	15	($package) = caller;
	16	if (!$isopen{$file}) {
	17	if (++$numopen > $maxopen) {
	18	sub byseq {$isopen{$a} != $isopen{$b};}
	19	local(@lru) = sort byseq keys(%isopen);
	20	splice(@lru, $maxopen / 3);
	21	$numopen -= @lru;
	22	for (@lru) { close $_; delete $isopen{$_}; }
	23	}
	24	&open($file, ($saw{$file}++ ? '>>' : '>') . $file)
	25	\|\| die "Can't create $file: $!\n";
	26	}
	27	$isopen{$file} = ++$seq;
	28	}
	29
	30	package cacheout;
	31
	32	$seq = 0;
	33	$numopen = 0;
	34
	35	if (open(PARAM,'/usr/include/sys/param.h')) {
	36	local($.);
	37	while (<PARAM>) {
	38	$maxopen = $1 - 4 if /^#define NOFILE\s+(\d+)/;
	39	}
	40	close PARAM;
	41	}
	42	$maxopen = 16 unless $maxopen;
	43
	44	1;