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comparison util/cache.lua @ 7016:e0a0af42b09f

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util.cache (and tests): Call on_evict after insertion of the new key, so inside on_evict we can be more certain about the current state of the cache (i.e. full, new item added, old item removed)
author Matthew Wild <mwild1@gmail.com>
date Tue, 22 Dec 2015 20:10:07 +0000
parents d779c55058c6
children 42e7545d5ae3
comparison
equal deleted inserted replaced
7012:990b4ddaf582 7016:e0a0af42b09f
49 -- New key 49 -- New key
50 if v == nil then 50 if v == nil then
51 return true; 51 return true;
52 end 52 end
53 -- Check whether we need to remove oldest k/v 53 -- Check whether we need to remove oldest k/v
54 local on_evict, evicted_key, evicted_value;
54 if self._count == self.size then 55 if self._count == self.size then
55 local tail = self._tail; 56 local tail = self._tail;
56 local on_evict = self._on_evict; 57 on_evict, evicted_key, evicted_value = self._on_evict, tail.key, tail.value;
57 if on_evict then
58 on_evict(tail.key, tail.value);
59 end
60 _remove(self, tail); 58 _remove(self, tail);
61 self._data[tail.key] = nil; 59 self._data[evicted_key] = nil;
62 end 60 end
63 61
64 m = { key = k, value = v, prev = nil, next = nil }; 62 m = { key = k, value = v, prev = nil, next = nil };
65 self._data[k] = m; 63 self._data[k] = m;
66 _insert(self, m); 64 _insert(self, m);
65 if on_evict and evicted_key then
66 on_evict(evicted_key, evicted_value, self);
67 end
67 return true; 68 return true;
68 end 69 end
69 70
70 function cache_methods:get(k) 71 function cache_methods:get(k)
71 local m = self._data[k]; 72 local m = self._data[k];