Implement atomic increment/decrement in Cache library

Requested via issue #109
Supersedes PR #241

1 files changed, 30 insertions, 1 deletions

diff --git a/system/libraries/Cache/drivers/Cache_dummy.php b/system/libraries/Cache/drivers/Cache_dummy.php
index d9af3773b..7e2b907a6 100644
--- a/system/libraries/Cache/drivers/Cache_dummy.php
+++ b/system/libraries/Cache/drivers/Cache_dummy.php
@@ -58,9 +58,10 @@ class CI_Cache_dummy extends CI_Driver {
 	 * @param	string	Unique Key
 	 * @param	mixed	Data to store
 	 * @param	int	Length of time (in seconds) to cache the data
+	 * @param	bool	Whether to store the raw value
 	 * @return	bool	TRUE, Simulating success
 	 */
-	public function save($id, $data, $ttl = 60)
+	public function save($id, $data, $ttl = 60, $raw = FALSE)
 	{
 		return TRUE;
 	}
@@ -81,6 +82,34 @@ class CI_Cache_dummy extends CI_Driver {
 	// ------------------------------------------------------------------------
 
 	/**
+	 * 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 TRUE;
+	}
+
+	// ------------------------------------------------------------------------
+
+	/**
+	 * 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 TRUE;
+	}
+
+	// ------------------------------------------------------------------------
+
+	/**
 	 * Clean the cache
 	 *
 	 * @return	bool	TRUE, simulating success