1 files changed, 53 insertions, 13 deletions

diff --git a/lib/private/memcache/xcache.php b/lib/private/memcache/xcache.php
index 33cea23e62b..48b0bd8a289 100644
--- a/lib/private/memcache/xcache.php
+++ b/lib/private/memcache/xcache.php
@@ -24,12 +24,13 @@
  */
 
 namespace OC\Memcache;
+use OCP\IMemcache;
 
 /**
  * See http://xcache.lighttpd.net/wiki/XcacheApi for provided constants and
  * functions etc.
  */
-class XCache extends Cache {
+class XCache extends Cache implements IMemcache {
 	/**
 	 * entries in XCache gets namespaced to prevent collisions between ownCloud instances and users
 	 */
@@ -38,28 +39,28 @@ class XCache extends Cache {
 	}
 
 	public function get($key) {
-		return xcache_get($this->getNamespace().$key);
+		return xcache_get($this->getNamespace() . $key);
 	}
 
-	public function set($key, $value, $ttl=0) {
-		if($ttl>0) {
-			return xcache_set($this->getNamespace().$key, $value, $ttl);
-		}else{
-			return xcache_set($this->getNamespace().$key, $value);
+	public function set($key, $value, $ttl = 0) {
+		if ($ttl > 0) {
+			return xcache_set($this->getNamespace() . $key, $value, $ttl);
+		} else {
+			return xcache_set($this->getNamespace() . $key, $value);
 		}
 	}
 
 	public function hasKey($key) {
-		return xcache_isset($this->getNamespace().$key);
+		return xcache_isset($this->getNamespace() . $key);
 	}
 
 	public function remove($key) {
-		return xcache_unset($this->getNamespace().$key);
+		return xcache_unset($this->getNamespace() . $key);
 	}
 
-	public function clear($prefix='') {
+	public function clear($prefix = '') {
 		if (function_exists('xcache_unset_by_prefix')) {
-			return xcache_unset_by_prefix($this->getNamespace().$prefix);
+			return xcache_unset_by_prefix($this->getNamespace() . $prefix);
 		} else {
 			// Since we can not clear by prefix, we just clear the whole cache.
 			xcache_clear_cache(\XC_TYPE_VAR, 0);
@@ -67,7 +68,46 @@ class XCache extends Cache {
 		return true;
 	}
 
-	static public function isAvailable(){
+	/**
+	 * Set a value in the cache if it's not already stored
+	 *
+	 * @param string $key
+	 * @param mixed $value
+	 * @param int $ttl Time To Live in seconds. Defaults to 60*60*24
+	 * @return bool
+	 */
+	public function add($key, $value, $ttl = 0) {
+		if ($this->hasKey($key)) {
+			return false;
+		} else {
+			return $this->set($key, $value, $ttl);
+		}
+	}
+
+	/**
+	 * Increase a stored number
+	 *
+	 * @param string $key
+	 * @param int $step
+	 * @return int | bool
+	 */
+	public function inc($key, $step = 1) {
+		$this->add($key, 0);
+		return xcache_inc($this->getPrefix() . $key, $step);
+	}
+
+	/**
+	 * Decrease a stored number
+	 *
+	 * @param string $key
+	 * @param int $step
+	 * @return int | bool
+	 */
+	public function dec($key, $step = 1) {
+		return xcache_dec($this->getPrefix() . $key, $step);
+	}
+
+	static public function isAvailable() {
 		if (!extension_loaded('xcache')) {
 			return false;
 		}
@@ -80,7 +120,7 @@ class XCache extends Cache {
 			// AND administration functions are password-protected.
 			return false;
 		}
-		$var_size = (int) ini_get('xcache.var_size');
+		$var_size = (int)ini_get('xcache.var_size');
 		if (!$var_size) {
 			return false;
 		}