From bb9aaad899c47e4eec49cbd444573e78d48a146a Mon Sep 17 00:00:00 2001
From: czaks <marcin@6irc.net>
Date: Sun, 8 May 2016 15:37:49 +0200
Subject: i forgot about a queue and a lock implementation

---
 inc/lock.php | 39 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 39 insertions(+)
 create mode 100644 inc/lock.php

(limited to 'inc/lock.php')

diff --git a/inc/lock.php b/inc/lock.php
new file mode 100644
index 00000000..4fb2f5df
--- /dev/null
+++ b/inc/lock.php
@@ -0,0 +1,39 @@
+<?php
+class Lock {
+  function __construct($key) { global $config;
+    if ($config['lock']['enabled'] == 'fs') {
+      $key = str_replace('/', '::', $key);
+      $key = str_replace("\0", '', $key);
+
+      $this->f = fopen("tmp/locks/$key", "w");
+    }
+  }
+
+  // Get a shared lock
+  function get($nonblock = false) { global $config;
+    if ($config['lock']['enabled'] == 'fs') {
+      $wouldblock = false;
+      flock($this->f, LOCK_SH | ($nonblock ? LOCK_NB : 0), $wouldblock);
+      if ($nonblock && $wouldblock) return false;
+    }
+    return $this;
+  }
+
+  // Get an exclusive lock
+  function get_ex($nonblock = false) { global $config;
+    if ($config['lock']['enabled'] == 'fs') {
+      $wouldblock = false;
+      flock($this->f, LOCK_EX | ($nonblock ? LOCK_NB : 0), $wouldblock);
+      if ($nonblock && $wouldblock) return false;
+    }
+    return $this;
+  }
+
+  // Free a lock
+  function free() { global $config;
+    if ($config['lock']['enabled'] == 'fs') {
+      flock($this->f, LOCK_UN);
+    }
+    return $this;
+  }
+}
-- 
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