Implement atomic increment/decrement in Cache library
Requested via issue #109
Supersedes PR #241
diff --git a/system/libraries/Cache/drivers/Cache_memcached.php b/system/libraries/Cache/drivers/Cache_memcached.php
index d2a3a48..886357e 100644
--- a/system/libraries/Cache/drivers/Cache_memcached.php
+++ b/system/libraries/Cache/drivers/Cache_memcached.php
@@ -60,14 +60,14 @@
/**
* Fetch from cache
*
- * @param mixed unique key id
- * @return mixed data on success/false on failure
+ * @param string $id Cache ID
+ * @return mixed Data on success, FALSE on failure
*/
public function get($id)
{
$data = $this->_memcached->get($id);
- return is_array($data) ? $data[0] : FALSE;
+ return is_array($data) ? $data[0] : $data;
}
// ------------------------------------------------------------------------
@@ -75,20 +75,26 @@
/**
* Save
*
- * @param string unique identifier
- * @param mixed data being cached
- * @param int time to live
- * @return bool true on success, false on failure
+ * @param string $id Cache ID
+ * @param mixed $data Data being cached
+ * @param int $ttl Time to live
+ * @param bool $raw Whether to store the raw value
+ * @return bool TRUE on success, FALSE on failure
*/
- public function save($id, $data, $ttl = 60)
+ public function save($id, $data, $ttl = 60, $raw = FALSE)
{
+ if ($raw !== TRUE)
+ {
+ $data = array($data, time, $ttl);
+ }
+
if (get_class($this->_memcached) === 'Memcached')
{
- return $this->_memcached->set($id, array($data, time(), $ttl), $ttl);
+ return $this->_memcached->set($id, $data, $ttl);
}
elseif (get_class($this->_memcached) === 'Memcache')
{
- return $this->_memcached->set($id, array($data, time(), $ttl), 0, $ttl);
+ return $this->_memcached->set($id, $data, 0, $ttl);
}
return FALSE;
@@ -110,6 +116,34 @@
// ------------------------------------------------------------------------
/**
+ * Increment a raw value
+ *
+ * @param string $id Cache ID
+ * @param int $offset Step/value to add
+ * @return mixed New value on success or FALSE on failure
+ */
+ public function increment($id, $offset = 1)
+ {
+ return $this->_memcached->increment($id, $offset);
+ }
+
+ // ------------------------------------------------------------------------
+
+ /**
+ * Decrement a raw value
+ *
+ * @param string $id Cache ID
+ * @param int $offset Step/value to reduce by
+ * @return mixed New value on success or FALSE on failure
+ */
+ public function decrement($id, $offset = 1)
+ {
+ return $this->_memcached->decrement($id, $offset);
+ }
+
+ // ------------------------------------------------------------------------
+
+ /**
* Clean the Cache
*
* @return bool false on failure/true on success