Commit | Line | Data |
---|---|---|
a6d71656 GS |
1 | # |
2 | # This library is no longer being maintained, and is included for backward | |
3 | # compatibility with Perl 4 programs which may require it. | |
e879c7c6 S |
4 | # This legacy library is deprecated and will be removed in a future |
5 | # release of perl. | |
a6d71656 GS |
6 | # |
7 | # In particular, this should not be used as an example of modern Perl | |
8 | # programming techniques. | |
9 | # | |
10 | # Suggested alternative: FileCache | |
11 | ||
e879c7c6 S |
12 | warn( "The 'cacheout.pl' legacy library is deprecated and will be" |
13 | . " removed in the next major release of perl. Please use the" | |
14 | . " FileCache module instead." ); | |
15 | ||
39c3038c LW |
16 | # Open in their package. |
17 | ||
18 | sub cacheout'open { | |
19 | open($_[0], $_[1]); | |
20 | } | |
21 | ||
a0d0e21e LW |
22 | # Close as well |
23 | ||
24 | sub cacheout'close { | |
25 | close($_[0]); | |
26 | } | |
27 | ||
39c3038c LW |
28 | # But only this sub name is visible to them. |
29 | ||
30 | sub cacheout { | |
31 | package cacheout; | |
32 | ||
33 | ($file) = @_; | |
39c3038c LW |
34 | if (!$isopen{$file}) { |
35 | if (++$numopen > $maxopen) { | |
55204971 | 36 | local(@lru) = sort {$isopen{$a} <=> $isopen{$b};} keys(%isopen); |
39c3038c LW |
37 | splice(@lru, $maxopen / 3); |
38 | $numopen -= @lru; | |
a0d0e21e | 39 | for (@lru) { &close($_); delete $isopen{$_}; } |
39c3038c LW |
40 | } |
41 | &open($file, ($saw{$file}++ ? '>>' : '>') . $file) | |
42 | || die "Can't create $file: $!\n"; | |
43 | } | |
44 | $isopen{$file} = ++$seq; | |
45 | } | |
46 | ||
47 | package cacheout; | |
48 | ||
49 | $seq = 0; | |
50 | $numopen = 0; | |
51 | ||
52 | if (open(PARAM,'/usr/include/sys/param.h')) { | |
7adad424 | 53 | local($_, $.); |
39c3038c | 54 | while (<PARAM>) { |
55204971 | 55 | $maxopen = $1 - 4 if /^\s*#\s*define\s+NOFILE\s+(\d+)/; |
39c3038c LW |
56 | } |
57 | close PARAM; | |
58 | } | |
59 | $maxopen = 16 unless $maxopen; | |
60 | ||
61 | 1; |