wincache_ucache_set
User should be aware that character '\' is not allowed as part of lock name. The reason why backslash is not allowed is because we are using CreateMutex call as described at http://msdn.microsoft.com/en-us/library/ms682411(VS.85).aspx. As per this article third parameter cannot have '\' character which is the lock name.
This means below code will not work.
<?php
$ret_val = wincache_lock("C:\WINDOWS\Temp/cache");
echo $ret_val . '<br>';
$ret_val = wincache_unlock("C:\WINDOWS\Temp/cache");
echo $ret_val . '<br>';
?>
wincache_unlock
(PECL wincache >= 1.1.0)
wincache_unlock — Releases an exclusive lock on a given key
Descrição
bool wincache_unlock
( string $key
)
Releases an exclusive lock that was obtained on a given key by using wincache_lock(). If any other process was blocked waiting for the lock on this key, that process will be able to obtain the lock.
Aviso
Using of the wincache_lock() and wincache_unlock() can cause deadlocks when executing PHP scripts in a multi-process environment like FastCGI. Do not use these functions unless you are absolutely sure you need to use them. For the majority of the operations on the user cache it is not necessary to use these functions.
Parâmetros
- key
-
Name of the key in the cache to release the lock on.
Valor Retornado
Retorna TRUE em caso de sucesso ou FALSE em falhas.
Exemplos
Exemplo #1 Using wincache_unlock()
<?php
$fp = fopen("/tmp/lock.txt", "r+");
if (wincache_lock(“lock_txt_lock”)) { // do an exclusive lock
ftruncate($fp, 0); // truncate file
fwrite($fp, "Write something here\n");
wincache_unlock(“lock_txt_lock”); // release the lock
} else {
echo "Couldn't get the lock!";
}
fclose($fp);
?>
Veja Também
- wincache_lock() - Acquires an exclusive lock on a given key
- wincache_ucache_set() - Adds a variable in user cache and overwrites a variable if it already exists in the cache
- wincache_ucache_get() - Gets a variable stored in the user cache
- wincache_ucache_delete() - Deletes variables from the user cache
- wincache_ucache_clear() - Deletes entire content of the user cache
- wincache_ucache_exists() - Checks if a variable exists in the user cache
- wincache_ucache_meminfo() - Retrieves information about user cache memory usage
- wincache_ucache_info() - Retrieves information about data stored in the user cache
- wincache_scache_info() - Retrieves information about files cached in the session cache
User Contributed Notes
wincache_unlock
wincache_unlock
donraman at microsoft dot com
23-Apr-2010 10:12
23-Apr-2010 10:12