Added thread pool interface to server

include/mysql/thread_pool_priv.h

+/*
+  Copyright (C) 2010, 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+*/
+
+#ifndef THREAD_POOL_PRIV_INCLUDED
+#define THREAD_POOL_PRIV_INCLUDED
+
+/*
+  The thread pool must be able to execute commands using the connection
+  state in THD object. This is the main objective of the thread pool to
+  schedule the start of these commands.
+*/
+bool do_command(THD *thd);
+
+/*
+  The thread pool requires an interface to the connection logic in the
+  MySQL Server since the thread pool will maintain the event logic on
+  the TCP connection of the MySQL Server. Thus new connections, dropped
+  connections will be discovered by the thread pool and it needs to
+  ensure that the proper MySQL Server logic attached to these events is
+  executed.
+*/
+bool login_connection(THD *thd);
+void prepare_new_connection_state(THD* thd);
+void end_connection(THD *thd);
+bool setup_connection_thread_globals(THD *thd);
+bool init_new_connection_handler_thread();
+
+/*
+  thread_created is maintained by thread pool when activated since
+  user threads are created by the thread pool (and also special
+  threads to maintain the thread pool).
+  max_connections is needed to calculate the maximum number of threads
+  that is allowed to be started by the thread pool.
+*/
+extern ulong thread_created, max_connections;
+#endif