Sha256: 3c079a69f88c1fa0af24a1ccc1da44c51739503db83ebd1db8bde5ccddcddfea
Contents?: true
Size: 933 Bytes
Versions: 34
Compression:
Stored size: 933 Bytes
Contents
require 'monitor'
module Looksist
class SafeLruCache < Hash
include MonitorMixin
def initialize(max_size)
@max_size = max_size
super(nil)
end
def []=(key, val)
synchronize do
super(key, val)
pop
val
end
end
def merge!(hash)
synchronize do
super(hash)
(count - @max_size).times { pop }
end
end
def mslice(keys)
synchronize do
keys.collect { |k| self[k] }
end
end
private
def pop
# not using shift coz: http://bugs.ruby-lang.org/issues/8312
delete(first[0]) if count > @max_size
end
def self.synchronize(*methods)
methods.each do |method|
define_method method do |*args, &blk|
synchronize do
super(*args, &blk)
end
end
end
end
synchronize :[], :each, :to_a, :delete, :count, :has_key?
end
end
Version data entries
34 entries across 34 versions & 1 rubygems