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System | : | Linux MiraNet 3.0.0-14-generic-pae #23-Ubuntu SMP Mon Nov 21 22:07:10 UTC 2011 i686 |
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/
usr/
share/
perl/
5.12.4/
- drwxr-xr-x
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Viewing file: cacheout.pl (1.18 KB) -rw-r--r--Select action/file-type:  ( +) |  ( +) |  ( +) | Code ( +) | Session ( +) |  ( +) | SDB ( +) |  ( +) |  ( +) |  ( +) |  ( +) |  ( +) |
# # This library is no longer being maintained, and is included for backward # compatibility with Perl 4 programs which may require it. # This legacy library is deprecated and will be removed in a future # release of perl. # # In particular, this should not be used as an example of modern Perl # programming techniques. # # Suggested alternative: FileCache
# Open in their package.
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;
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