From 354bb40e75d94466e91fe6960523612c9d17ccfb Mon Sep 17 00:00:00 2001
From: Karen Arutyunov <karen@codesynthesis.com>
Date: Thu, 2 Nov 2017 23:11:29 +0300
Subject: Add implementation

---
 mysql/mysql/service_thread_scheduler.h | 85 ++++++++++++++++++++++++++++++++++
 1 file changed, 85 insertions(+)
 create mode 100644 mysql/mysql/service_thread_scheduler.h

(limited to 'mysql/mysql/service_thread_scheduler.h')

diff --git a/mysql/mysql/service_thread_scheduler.h b/mysql/mysql/service_thread_scheduler.h
new file mode 100644
index 0000000..832aff0
--- /dev/null
+++ b/mysql/mysql/service_thread_scheduler.h
@@ -0,0 +1,85 @@
+/*
+  Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved.
+
+  This program is free software; you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation; version 2 of the License.
+
+  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 General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program; if not, write to the Free Software
+  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA
+*/
+
+#ifndef SERVICE_THREAD_SCHEDULER_INCLUDED
+#define SERVICE_THREAD_SCHEDULER_INCLUDED
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+struct Connection_handler_functions;
+struct THD_event_functions;
+
+extern struct my_thread_scheduler_service {
+  int (*connection_handler_set)(struct Connection_handler_functions *,
+                                struct THD_event_functions *);
+  int (*connection_handler_reset)();
+} *my_thread_scheduler_service;
+
+
+#ifdef MYSQL_DYNAMIC_PLUGIN
+
+#define my_connection_handler_set(F, M) \
+  my_thread_scheduler_service->connection_handler_set((F), (M))
+#define my_connection_handler_reset() \
+  my_thread_scheduler_service->connection_handler_reset()
+
+#else
+
+/**
+   Instantiates Plugin_connection_handler based on the supplied
+   Conection_handler_functions and sets it as the current
+   connection handler.
+
+   Also sets the THD_event_functions functions which will
+   be called by the server when e.g. begining a wait.
+
+   Remembers the existing connection handler so that it can be restored later.
+
+   @param chf  struct with functions to be called when e.g. handling
+               new clients.
+   @param tef  struct with functions to be called when events
+               (e.g. lock wait) happens.
+
+   @note Both pointers (i.e. not the structs themselves) will be copied,
+         so the structs must not disappear.
+
+   @note We don't support dynamically loading more than one connection handler.
+
+   @retval 1  failure
+   @retval 0  success
+*/
+int my_connection_handler_set(struct Connection_handler_functions *chf,
+                              struct THD_event_functions *tef);
+
+/**
+   Destroys the current connection handler and restores the previous.
+   Should only be called after calling my_connection_handler_set().
+
+   @retval 1  failure
+   @retval 0  success
+*/
+int my_connection_handler_reset();
+
+#endif /* MYSQL_DYNAMIC_PLUGIN */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* SERVICE_THREAD_SCHEDULER_INCLUDED */
-- 
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