40 lines
1.0 KiB
PHP
40 lines
1.0 KiB
PHP
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<?php
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class Lock {
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function __construct($key) { global $config;
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if ($config['lock']['enabled'] == 'fs') {
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$key = str_replace('/', '::', $key);
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$key = str_replace("\0", '', $key);
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$this->f = fopen("tmp/locks/$key", "w");
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}
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}
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// Get a shared lock
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function get($nonblock = false) { global $config;
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if ($config['lock']['enabled'] == 'fs') {
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$wouldblock = false;
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flock($this->f, LOCK_SH | ($nonblock ? LOCK_NB : 0), $wouldblock);
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if ($nonblock && $wouldblock) return false;
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}
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return $this;
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}
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// Get an exclusive lock
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function get_ex($nonblock = false) { global $config;
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if ($config['lock']['enabled'] == 'fs') {
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$wouldblock = false;
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flock($this->f, LOCK_EX | ($nonblock ? LOCK_NB : 0), $wouldblock);
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if ($nonblock && $wouldblock) return false;
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}
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return $this;
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}
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// Free a lock
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function free() { global $config;
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if ($config['lock']['enabled'] == 'fs') {
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flock($this->f, LOCK_UN);
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}
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return $this;
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}
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}
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