/*

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * This code 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

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

#include "Lock.h"

Lock::Lock(void) {

    Initialize();

}

Lock::Lock(bool Value) {

    Initialize();

    if (Value == true) {

        Enter();

    }

}

void Lock::Initialize() {

#ifdef WINDOWS

    InitializeCriticalSectionAndSpinCount(&FCriticalSection, 0x00000400);

#endif // WINDOWS

#ifdef MAC

    // FMutex =  PTHREAD_RECURSIVE_MUTEX_INITIALIZER;

#endif // MAC

#ifdef LINUX

    // FMutex =  PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP;

#endif // LINUX

}

Lock::~Lock(void) {

#ifdef WINDOWS

    DeleteCriticalSection(&FCriticalSection);

#endif // WINDOWS

#ifdef POSIX

    pthread_mutex_unlock(&FMutex);

#endif // POSIX

}

void Lock::Enter() {

#ifdef WINDOWS

    EnterCriticalSection(&FCriticalSection);

#endif // WINDOWS

#ifdef POSIX

    pthread_mutex_lock(&FMutex);

#endif // POSIX

}

void Lock::Leave() {

#ifdef WINDOWS

    LeaveCriticalSection(&FCriticalSection);

#endif // WINDOWS

#ifdef POSIX

    pthread_mutex_unlock(&FMutex);

#endif // POSIX

}

bool Lock::TryEnter() {

    bool result = false;

#ifdef WINDOWS

    if (TryEnterCriticalSection (&FCriticalSection) != 0)

        result = true;

#endif // WINDOWS

#ifdef POSIX

    if (pthread_mutex_lock(&FMutex) == 0)

        result = true;

#endif // POSIX

    return result;

}