--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/MySQL/Plugins/MySQLDefinitions.h	Thu May 09 11:29:17 2019 +0200
@@ -0,0 +1,49 @@
+/**
+ * Orthanc - A Lightweight, RESTful DICOM Store
+ * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
+ * Department, University Hospital of Liege, Belgium
+ * Copyright (C) 2017-2019 Osimis S.A., Belgium
+ *
+ * This program is free software: you can redistribute it and/or
+ * modify it under the terms of the GNU Affero General Public License
+ * as published by the Free Software Foundation, either version 3 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Affero General Public License for more details.
+ * 
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ **/
+
+
+#pragma once
+
+#include <stdint.h>
+
+
+/**
+ * This advisory lock is used if the "Lock" option is set to "true",
+ * in order to prevent the execution of two PostgreSQL index plugins
+ * on the same database.
+ **/
+static const char* const MYSQL_LOCK_INDEX = "orthanc_index_lock";
+
+
+/**
+ * This advisory lock is used if the "Lock" option is set to "true",
+ * in order to prevent the execution of two PostgreSQL storage area
+ * plugins on the same database.
+ **/
+static const char* const MYSQL_LOCK_STORAGE = "orthanc_storage_lock";
+
+
+/**
+ * Transient advisory lock to protect the setup of the database,
+ * because concurrent statements like "CREATE TABLE" are not protected
+ * by transactions.
+ * https://groups.google.com/d/msg/orthanc-users/yV3LSTh_TjI/h3PRApJFBAAJ
+ **/
+static const char* const MYSQL_LOCK_DATABASE_SETUP = "orthanc_setup_lock";