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root |
1.1 |
# |
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# This library is no longer being maintained, and is included for backward |
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# compatibility with Perl 4 programs which may require it. |
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# |
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# In particular, this should not be used as an example of modern Perl |
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# programming techniques. |
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# |
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# Suggested alternative: FileCache |
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# Open in their package. |
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sub cacheout'open { |
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open($_[0], $_[1]); |
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} |
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# Close as well |
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sub cacheout'close { |
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close($_[0]); |
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} |
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# But only this sub name is visible to them. |
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sub cacheout { |
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package cacheout; |
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($file) = @_; |
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if (!$isopen{$file}) { |
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if (++$numopen > $maxopen) { |
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local(@lru) = sort {$isopen{$a} <=> $isopen{$b};} keys(%isopen); |
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splice(@lru, $maxopen / 3); |
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$numopen -= @lru; |
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for (@lru) { &close($_); delete $isopen{$_}; } |
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} |
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&open($file, ($saw{$file}++ ? '>>' : '>') . $file) |
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|| die "Can't create $file: $!\n"; |
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} |
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$isopen{$file} = ++$seq; |
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} |
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package cacheout; |
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$seq = 0; |
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$numopen = 0; |
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if (open(PARAM,'/usr/include/sys/param.h')) { |
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local($_, $.); |
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while (<PARAM>) { |
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$maxopen = $1 - 4 if /^\s*#\s*define\s+NOFILE\s+(\d+)/; |
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} |
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close PARAM; |
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} |
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$maxopen = 16 unless $maxopen; |
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1; |
