MediaWiki  1.28.0
APCBagOStuff.php
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1 <?php
29 class APCBagOStuff extends BagOStuff {
30 
35  protected $nativeSerialize;
36 
42  const KEY_SUFFIX = ':2';
43 
54  public function __construct( array $params = [] ) {
55  parent::__construct( $params );
56 
57  if ( isset( $params['nativeSerialize'] ) ) {
58  $this->nativeSerialize = $params['nativeSerialize'];
59  } elseif ( extension_loaded( 'apcu' ) && ini_get( 'apc.serializer' ) === 'default' ) {
60  // APCu has a memory corruption bug when the serializer is set to 'default'.
61  // See T120267, and upstream bug reports:
62  // - https://github.com/krakjoe/apcu/issues/38
63  // - https://github.com/krakjoe/apcu/issues/35
64  // - https://github.com/krakjoe/apcu/issues/111
65  $this->logger->warning(
66  'The APCu extension is loaded and the apc.serializer INI setting ' .
67  'is set to "default". This can cause memory corruption! ' .
68  'You should change apc.serializer to "php" instead. ' .
69  'See <https://github.com/krakjoe/apcu/issues/38>.'
70  );
71  $this->nativeSerialize = false;
72  } else {
73  $this->nativeSerialize = true;
74  }
75  }
76 
77  protected function doGet( $key, $flags = 0 ) {
78  return $this->getUnserialize(
79  apc_fetch( $key . self::KEY_SUFFIX )
80  );
81  }
82 
83  protected function getUnserialize( $value ) {
84  if ( is_string( $value ) && !$this->nativeSerialize ) {
85  $value = $this->isInteger( $value )
86  ? intval( $value )
87  : unserialize( $value );
88  }
89  return $value;
90  }
91 
92  public function set( $key, $value, $exptime = 0, $flags = 0 ) {
93  apc_store(
94  $key . self::KEY_SUFFIX,
95  $this->setSerialize( $value ),
96  $exptime
97  );
98 
99  return true;
100  }
101 
102  protected function setSerialize( $value ) {
103  if ( !$this->nativeSerialize && !$this->isInteger( $value ) ) {
104  $value = serialize( $value );
105  }
106  return $value;
107  }
108 
109  public function delete( $key ) {
110  apc_delete( $key . self::KEY_SUFFIX );
111 
112  return true;
113  }
114 
115  public function incr( $key, $value = 1 ) {
116  return apc_inc( $key . self::KEY_SUFFIX, $value );
117  }
118 
119  public function decr( $key, $value = 1 ) {
120  return apc_dec( $key . self::KEY_SUFFIX, $value );
121  }
122 }
the array() calling protocol came about after MediaWiki 1.4rc1.
decr($key, $value=1)
getUnserialize($value)
$value
it s the revision text itself In either if gzip is the revision text is gzipped $flags
Definition: hooks.txt:2703
__construct(array $params=[])
Constructor.
This is a wrapper for APC's shared memory functions.
unserialize($serialized)
Definition: ApiMessage.php:102
$params
bool $nativeSerialize
If true, trust the APC implementation to serialize and deserialize objects correctly.
injection txt This is an overview of how MediaWiki makes use of dependency injection The design described here grew from the discussion of RFC T384 The term dependency this means that anything an object needs to operate should be injected from the the object itself should only know narrow no concrete implementation of the logic it relies on The requirement to inject everything typically results in an architecture that based on two main types of and essentially stateless service objects that use other service objects to operate on the value objects As of the beginning MediaWiki is only starting to use the DI approach Much of the code still relies on global state or direct resulting in a highly cyclical dependency which acts as the top level factory for services in MediaWiki which can be used to gain access to default instances of various services MediaWikiServices however also allows new services to be defined and default services to be redefined Services are defined or redefined by providing a callback the instantiator that will return a new instance of the service When it will create an instance of MediaWikiServices and populate it with the services defined in the files listed by thereby bootstrapping the DI framework Per $wgServiceWiringFiles lists includes ServiceWiring php
Definition: injection.txt:35
setSerialize($value)
serialize()
Definition: ApiMessage.php:94
set($key, $value, $exptime=0, $flags=0)
doGet($key, $flags=0)
isInteger($value)
Check if a value is an integer.
Definition: BagOStuff.php:725
incr($key, $value=1)