1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
|
#
# This library is no longer being maintained, and is included for backward
# compatibility with Perl 4 programs which may require it.
#
# In particular, this should not be used as an example of modern Perl
# programming techniques.
#
# Suggested alternative: FileCache
# Open in their package.
no warnings "ambiguous";
sub cacheout::open {
open($_[0], $_[1]);
}
# Close as well
sub cacheout::close {
close($_[0]);
}
# But only this sub name is visible to them.
sub cacheout {
package cacheout;
($file) = @_;
if (!$isopen{$file}) {
if (++$numopen > $maxopen) {
local(@lru) = sort {$isopen{$a} <=> $isopen{$b};} 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 /^\s*#\s*define\s+NOFILE\s+(\d+)/;
}
close PARAM;
}
$maxopen = 16 unless $maxopen;
1;
|
