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<title>Caching/ExpiringCacheMap/Internal/Types.hs</title>
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<pre><a name="line-1"></a><span class='hs-comment'>{-# LANGUAGE OverloadedStrings #-}</span>
<a name="line-2"></a><span class='hs-comment'>-- |</span>
<a name="line-3"></a><span class='hs-comment'>-- Module : Caching.ExpiringCacheMap.Internal.Types</span>
<a name="line-4"></a><span class='hs-comment'>-- Copyright: (c) 2014 Edward L. Blake</span>
<a name="line-5"></a><span class='hs-comment'>-- License: BSD-style</span>
<a name="line-6"></a><span class='hs-comment'>-- Maintainer: Edward L. Blake <edwardlblake@gmail.com></span>
<a name="line-7"></a><span class='hs-comment'>-- Stability: experimental</span>
<a name="line-8"></a><span class='hs-comment'>-- Portability: portable</span>
<a name="line-9"></a><span class='hs-comment'>--</span>
<a name="line-10"></a><span class='hs-comment'>-- Types used by internal functions and as the opaque types exported by other </span>
<a name="line-11"></a><span class='hs-comment'>-- modules, assume these type definitions to change from version to version.</span>
<a name="line-12"></a><span class='hs-comment'>-- </span>
<a name="line-13"></a>
<a name="line-14"></a><span class='hs-keyword'>module</span> <span class='hs-conid'>Caching</span><span class='hs-varop'>.</span><span class='hs-conid'>ExpiringCacheMap</span><span class='hs-varop'>.</span><span class='hs-conid'>Internal</span><span class='hs-varop'>.</span><span class='hs-conid'>Types</span> <span class='hs-layout'>(</span>
<a name="line-15"></a> <span class='hs-comment'>-- * Cache internals</span>
<a name="line-16"></a> <span class='hs-conid'>ECM</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span>
<a name="line-17"></a> <span class='hs-conid'>CacheState</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span>
<a name="line-18"></a> <span class='hs-conid'>ECMNewState</span><span class='hs-layout'>,</span>
<a name="line-19"></a> <span class='hs-conid'>ECMEnterState</span><span class='hs-layout'>,</span>
<a name="line-20"></a> <span class='hs-conid'>ECMReadState</span>
<a name="line-21"></a><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-22"></a>
<a name="line-23"></a><span class='hs-keyword'>import</span> <span class='hs-keyword'>qualified</span> <span class='hs-conid'>Control</span><span class='hs-varop'>.</span><span class='hs-conid'>Concurrent</span><span class='hs-varop'>.</span><span class='hs-conid'>MVar</span> <span class='hs-keyword'>as</span> <span class='hs-conid'>MV</span>
<a name="line-24"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Caching</span><span class='hs-varop'>.</span><span class='hs-conid'>ExpiringCacheMap</span><span class='hs-varop'>.</span><span class='hs-conid'>Utils</span><span class='hs-varop'>.</span><span class='hs-conid'>Types</span>
<a name="line-25"></a>
<a name="line-26"></a><a name="ECMNewState"></a><span class='hs-keyword'>type</span> <span class='hs-conid'>ECMNewState</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>s</span> <span class='hs-varid'>m</span> <span class='hs-varid'>k</span> <span class='hs-varid'>v</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-conid'>CacheState</span> <span class='hs-varid'>s</span> <span class='hs-varid'>m</span> <span class='hs-varid'>k</span> <span class='hs-varid'>v</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span> <span class='hs-layout'>(</span><span class='hs-varid'>b</span> <span class='hs-layout'>(</span><span class='hs-conid'>CacheState</span> <span class='hs-varid'>s</span> <span class='hs-varid'>m</span> <span class='hs-varid'>k</span> <span class='hs-varid'>v</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-27"></a>
<a name="line-28"></a><a name="ECMEnterState"></a><span class='hs-keyword'>type</span> <span class='hs-conid'>ECMEnterState</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>s</span> <span class='hs-varid'>m</span> <span class='hs-varid'>k</span> <span class='hs-varid'>v</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>b</span> <span class='hs-layout'>(</span><span class='hs-conid'>CacheState</span> <span class='hs-varid'>s</span> <span class='hs-varid'>m</span> <span class='hs-varid'>k</span> <span class='hs-varid'>v</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-conid'>CacheState</span> <span class='hs-varid'>s</span> <span class='hs-varid'>m</span> <span class='hs-varid'>k</span> <span class='hs-varid'>v</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-conid'>CacheState</span> <span class='hs-varid'>s</span> <span class='hs-varid'>m</span> <span class='hs-varid'>k</span> <span class='hs-varid'>v</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span> <span class='hs-varid'>v</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span> <span class='hs-varid'>v</span>
<a name="line-29"></a>
<a name="line-30"></a><a name="ECMReadState"></a><span class='hs-keyword'>type</span> <span class='hs-conid'>ECMReadState</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>s</span> <span class='hs-varid'>m</span> <span class='hs-varid'>k</span> <span class='hs-varid'>v</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>b</span> <span class='hs-layout'>(</span><span class='hs-conid'>CacheState</span> <span class='hs-varid'>s</span> <span class='hs-varid'>m</span> <span class='hs-varid'>k</span> <span class='hs-varid'>v</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span> <span class='hs-layout'>(</span><span class='hs-conid'>CacheState</span> <span class='hs-varid'>s</span> <span class='hs-varid'>m</span> <span class='hs-varid'>k</span> <span class='hs-varid'>v</span><span class='hs-layout'>)</span>
<a name="line-31"></a>
<a name="line-32"></a><a name="CacheState"></a><span class='hs-comment'>-- | The cache state.</span>
<a name="line-33"></a><a name="CacheState"></a><span class='hs-keyword'>newtype</span> <span class='hs-conid'>CacheState</span> <span class='hs-varid'>s</span> <span class='hs-varid'>m</span> <span class='hs-varid'>k</span> <span class='hs-varid'>v</span> <span class='hs-keyglyph'>=</span>
<a name="line-34"></a> <span class='hs-conid'>CacheState</span> <span class='hs-layout'>(</span><span class='hs-conid'>Maybe</span> <span class='hs-varid'>s</span><span class='hs-layout'>,</span> <span class='hs-varid'>m</span> <span class='hs-varid'>k</span> <span class='hs-layout'>(</span><span class='hs-conid'>TimeUnits</span><span class='hs-layout'>,</span> <span class='hs-conid'>TimeUnits</span><span class='hs-layout'>,</span> <span class='hs-varid'>v</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span> <span class='hs-conid'>ECMMapSize</span><span class='hs-layout'>,</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>[</span><span class='hs-layout'>(</span><span class='hs-varid'>k</span><span class='hs-layout'>,</span> <span class='hs-conid'>ECMIncr</span><span class='hs-layout'>)</span><span class='hs-keyglyph'>]</span><span class='hs-layout'>,</span> <span class='hs-conid'>ECMULength</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span> <span class='hs-conid'>ECMIncr</span><span class='hs-layout'>)</span>
<a name="line-35"></a>
<a name="line-36"></a><a name="ECM"></a><span class='hs-comment'>-- | The type that encapsulates a cache map.</span>
<a name="line-37"></a><a name="ECM"></a><span class='hs-keyword'>newtype</span> <span class='hs-conid'>ECM</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>s</span> <span class='hs-varid'>m</span> <span class='hs-varid'>k</span> <span class='hs-varid'>v</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>ECM</span> <span class='hs-layout'>(</span> <span class='hs-varid'>b</span> <span class='hs-layout'>(</span><span class='hs-conid'>CacheState</span> <span class='hs-varid'>s</span> <span class='hs-varid'>m</span> <span class='hs-varid'>k</span> <span class='hs-varid'>v</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span>
<a name="line-38"></a> <span class='hs-conid'>Maybe</span> <span class='hs-varid'>s</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>k</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span> <span class='hs-layout'>(</span><span class='hs-conid'>TimeUnits</span><span class='hs-layout'>,</span> <span class='hs-layout'>(</span><span class='hs-conid'>Maybe</span> <span class='hs-varid'>s</span><span class='hs-layout'>,</span> <span class='hs-varid'>v</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span>
<a name="line-39"></a> <span class='hs-varid'>a</span> <span class='hs-conid'>TimeUnits</span><span class='hs-layout'>,</span>
<a name="line-40"></a> <span class='hs-conid'>ECMMapSize</span><span class='hs-layout'>,</span>
<a name="line-41"></a> <span class='hs-comment'>-- TimeUnits,</span>
<a name="line-42"></a> <span class='hs-conid'>ECMIncr</span><span class='hs-layout'>,</span>
<a name="line-43"></a> <span class='hs-conid'>ECMULength</span><span class='hs-layout'>,</span>
<a name="line-44"></a> <span class='hs-conid'>ECMULength</span><span class='hs-layout'>,</span>
<a name="line-45"></a> <span class='hs-conid'>ECMEnterState</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>s</span> <span class='hs-varid'>m</span> <span class='hs-varid'>k</span> <span class='hs-varid'>v</span><span class='hs-layout'>,</span>
<a name="line-46"></a> <span class='hs-conid'>ECMReadState</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>s</span> <span class='hs-varid'>m</span> <span class='hs-varid'>k</span> <span class='hs-varid'>v</span><span class='hs-layout'>)</span>
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