diff options
| author | tianhe1986 <w1s2j3229@163.com> | 2017-07-05 11:05:23 +0200 |
|---|---|---|
| committer | tianhe1986 <w1s2j3229@163.com> | 2017-07-05 11:05:23 +0200 |
| commit | e98c203f81a11cfd82a644381cd50f865384118d (patch) | |
| tree | e0264e2811a92ae60cb715b8e13a675a4e8b1faf /system/libraries | |
| parent | 569cf69078de1c8a970ab4259467dfe27b4cdb96 (diff) | |
Acquiring memcached lock with add() to avoid race conditions.
Signed-off-by: tianhe1986 <w1s2j3229@163.com>
Diffstat (limited to 'system/libraries')
| -rw-r--r-- | system/libraries/Session/drivers/Session_memcached_driver.php | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/system/libraries/Session/drivers/Session_memcached_driver.php b/system/libraries/Session/drivers/Session_memcached_driver.php index 2556bf0f7..542f596c9 100644 --- a/system/libraries/Session/drivers/Session_memcached_driver.php +++ b/system/libraries/Session/drivers/Session_memcached_driver.php @@ -310,7 +310,7 @@ class CI_Session_memcached_driver extends CI_Session_driver implements SessionHa if ( ! $this->_memcached->replace($this->_lock_key, time(), 300)) { return ($this->_memcached->getResultCode() === Memcached::RES_NOTFOUND) - ? $this->_memcached->set($this->_lock_key, time(), 300) + ? $this->_memcached->add($this->_lock_key, time(), 300) : FALSE; } } @@ -326,7 +326,11 @@ class CI_Session_memcached_driver extends CI_Session_driver implements SessionHa continue; } - if ( ! $this->_memcached->set($lock_key, time(), 300)) + $set_result = ($this->_memcached->getResultCode() === Memcached::RES_NOTFOUND) + ? $this->_memcached->add($lock_key, time(), 300) + : $this->_memcached->set($lock_key, time(), 300); + + if ( ! $set_result) { log_message('error', 'Session: Error while trying to obtain lock for '.$this->_key_prefix.$session_id); return FALSE; |