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-rw-r--r--lib/iomanager.php1
1 files changed, 1 insertions, 0 deletions
diff --git a/lib/iomanager.php b/lib/iomanager.php
index ee2ff958b..f9d97d6a9 100644
--- a/lib/iomanager.php
+++ b/lib/iomanager.php
@@ -31,6 +31,7 @@
abstract class IoManager
{
+ const GLOBAL_SINGLE_ONLY = -1;
const SINGLE_ONLY = 0;
const INSTANCE_PER_SITE = 1;
const INSTANCE_PER_PROCESS = 2;