Index: modules/system/system.install
===================================================================
RCS file: /cvs/drupal/drupal/modules/system/system.install,v
retrieving revision 1.422
diff -u -p -r1.422 system.install
--- modules/system/system.install	11 Nov 2009 17:06:30 -0000	1.422
+++ modules/system/system.install	12 Nov 2009 04:37:57 -0000
@@ -2767,6 +2767,41 @@ function system_update_7045() {
 }
 
 /**
+ * Add the semaphore table.
+ */
+function system_update_7046() {
+  $schema['semaphore'] = array(
+    'description' => 'Table for holding semaphores, locks, flags, etc. that cannot be stored as Drupal variables since they must not be cached.',
+    'fields' => array(
+      'name' => array(
+        'description' => 'Primary Key: Unique name.',
+        'type' => 'varchar',
+        'length' => 255,
+        'not null' => TRUE,
+        'default' => ''
+      ),
+      'value' => array(
+        'description' => 'A value for the semaphore.',
+        'type' => 'varchar',
+        'length' => 255,
+        'not null' => TRUE,
+        'default' => ''
+      ),
+      'expire' => array(
+        'description' => 'A Unix timestamp with microseconds indicating when the semaphore should expire.',
+        'type' => 'float',
+        'size' => 'big',
+        'not null' => TRUE
+      ),
+    ),
+    'indexes' => array('value' => array('value')),
+    'primary key' => array('name'),
+  );
+
+  db_create_table('semaphore', $schema['semaphore']);
+}
+
+/**
  * @} End of "defgroup updates-6.x-to-7.x"
  * The next series of updates should start at 8000.
  */