Added connection pool class. Using semaphores (also added)

1 files changed, 70 insertions, 0 deletions

diff --git a/server/src/connectionpool.h b/server/src/connectionpool.h
new file mode 100644
index 0000000..548d76a
--- /dev/null
+++ b/server/src/connectionpool.h
@@ -0,0 +1,70 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set et sw=2 ts=2: */
+/***************************************************************************
+ *            connectionpool.h
+ *
+ *  Wed Dec 16 12:20:44 CET 2009
+ *  Copyright 2009 Bent Bisballe Nyeng
+ *  deva@aasimon.org
+ ****************************************************************************/
+
+/*
+ *  This file is part of Pracro.
+ *
+ *  Pracro 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; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  Pracro 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 Pracro; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA.
+ */
+#ifndef __PRACRO_CONNECTIONPOOL_H__
+#define __PRACRO_CONNECTIONPOOL_H__
+
+#include <list>
+
+#include "mutex.h"
+#include "semaphore.h"
+
+class Database;
+
+class ConnectionPool {
+public:
+  ConnectionPool();
+
+  void addDatabase(Database *db);
+  void removeDatabase(Database *db);
+
+  bool testFree(Database *db);
+  int numFreeDatabases();
+
+  Database *borrowDatabase();
+  void returnDatabase(Database *db);
+
+private:
+  Semaphore semaphore;
+  Mutex mutex;
+  std::list<Database *> activedbs;
+  std::list<Database *> passivedbs;
+};
+
+class AutoBorrower {
+public:
+  AutoBorrower(ConnectionPool &pool);
+  ~AutoBorrower();
+
+  Database *db();
+
+private:
+  ConnectionPool &pool;
+  Database *_db;
+};
+
+#endif/*__PRACRO_CONNECTIONPOOL_H__*/