Added mod_khomp Endpoint.

This module has been developed to make a nice,
affordable brazilian board called Khomp
(http://www.khomp.com.br) compatible with FreeSWITCH.

Supported boards:
- FXS
- FXO
- E1
- GSM (boards and usb devices)
- Passive record
- kommuter

src/mod/endpoints/mod_khomp/commons/scoped_lock.hpp

@@ -0,0 +1,95 @@
+/*
+    KHOMP generic endpoint/channel library.
+    Copyright (C) 2007-2009 Khomp Ind. & Com.
+
+  The contents of this file are subject to the Mozilla Public License Version 1.1
+  (the "License"); you may not use this file except in compliance with the
+  License. You may obtain a copy of the License at http://www.mozilla.org/MPL/
+
+  Software distributed under the License is distributed on an "AS IS" basis,
+  WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License for
+  the specific language governing rights and limitations under the License.
+
+  Alternatively, the contents of this file may be used under the terms of the
+  "GNU Lesser General Public License 2.1" license (the “LGPL" License), in which
+  case the provisions of "LGPL License" are applicable instead of those above.
+
+  If you wish to allow use of your version of this file only under the terms of
+  the LGPL License and not to allow others to use your version of this file under
+  the MPL, indicate your decision by deleting the provisions above and replace them
+  with the notice and other provisions required by the LGPL License. If you do not
+  delete the provisions above, a recipient may use your version of this file under
+  either the MPL or the LGPL License.
+
+  The LGPL header follows below:
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Lesser General Public
+    License as published by the Free Software Foundation; either
+    version 2.1 of the License, or (at your option) any later version.
+
+    This library 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
+    Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public License
+    along with this library; if not, write to the Free Software Foundation, Inc.,
+    51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+
+*/
+
+#include <simple_lock.hpp>
+
+struct ScopedLockBasic
+{
+    ScopedLockBasic(void)
+    : _locked(true) {};
+
+    ScopedLockBasic(bool locked)
+    : _locked(locked) {};
+
+    virtual ~ScopedLockBasic() {};
+
+ protected:
+    bool _locked;
+};
+
+
+struct ScopedLock : public ScopedLockBasic
+{
+    struct LockFailed {};
+
+    ScopedLock(SimpleLock & mutex)
+    : ScopedLockBasic(false), _mutex(mutex)
+    {
+        switch (_mutex.lock())
+        {
+            case SimpleLock::ISINUSE:
+            case SimpleLock::FAILURE:
+                throw LockFailed();
+            default:
+                break;
+        }
+
+        _locked = true;
+    }
+
+    ~ScopedLock()
+    {
+        unlock();
+    }
+
+    void unlock()
+    {
+        if (_locked)
+        {
+            _locked = false;
+            _mutex.unlock();
+        }
+    }
+
+ protected:
+    SimpleLock & _mutex;
+};
+