1<?php
2
3namespace Doctrine\Common\Cache;
4
5use function apcu_cache_info;
6use function apcu_clear_cache;
7use function apcu_delete;
8use function apcu_exists;
9use function apcu_fetch;
10use function apcu_sma_info;
11use function apcu_store;
12use function count;
13
14/**
15 * APCu cache provider.
16 *
17 * @link   www.doctrine-project.org
18 */
19class ApcuCache extends CacheProvider
20{
21    /**
22     * {@inheritdoc}
23     */
24    protected function doFetch($id)
25    {
26        return apcu_fetch($id);
27    }
28
29    /**
30     * {@inheritdoc}
31     */
32    protected function doContains($id)
33    {
34        return apcu_exists($id);
35    }
36
37    /**
38     * {@inheritdoc}
39     */
40    protected function doSave($id, $data, $lifeTime = 0)
41    {
42        return apcu_store($id, $data, $lifeTime);
43    }
44
45    /**
46     * {@inheritdoc}
47     */
48    protected function doDelete($id)
49    {
50        // apcu_delete returns false if the id does not exist
51        return apcu_delete($id) || ! apcu_exists($id);
52    }
53
54    /**
55     * {@inheritdoc}
56     */
57    protected function doDeleteMultiple(array $keys)
58    {
59        $result = apcu_delete($keys);
60
61        return $result !== false && count($result) !== count($keys);
62    }
63
64    /**
65     * {@inheritdoc}
66     */
67    protected function doFlush()
68    {
69        return apcu_clear_cache();
70    }
71
72    /**
73     * {@inheritdoc}
74     */
75    protected function doFetchMultiple(array $keys)
76    {
77        return apcu_fetch($keys) ?: [];
78    }
79
80    /**
81     * {@inheritdoc}
82     */
83    protected function doSaveMultiple(array $keysAndValues, $lifetime = 0)
84    {
85        $result = apcu_store($keysAndValues, null, $lifetime);
86
87        return empty($result);
88    }
89
90    /**
91     * {@inheritdoc}
92     */
93    protected function doGetStats()
94    {
95        $info = apcu_cache_info(true);
96        $sma  = apcu_sma_info();
97
98        return [
99            Cache::STATS_HITS             => $info['num_hits'],
100            Cache::STATS_MISSES           => $info['num_misses'],
101            Cache::STATS_UPTIME           => $info['start_time'],
102            Cache::STATS_MEMORY_USAGE     => $info['mem_size'],
103            Cache::STATS_MEMORY_AVAILABLE => $sma['avail_mem'],
104        ];
105    }
106}
107