// message.cpp

/*    Copyright 2009 10gen Inc.
 *
 *    This program is free software: you can redistribute it and/or  modify
 *    it under the terms of the GNU Affero General Public License, version 3,
 *    as published by the Free Software Foundation.
 *
 *    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 Affero General Public License for more details.
 *
 *    You should have received a copy of the GNU Affero General Public License
 *    along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 *    As a special exception, the copyright holders give permission to link the
 *    code of portions of this program with the OpenSSL library under certain
 *    conditions as described in each individual source file and distribute
 *    linked combinations including the program with the OpenSSL library. You
 *    must comply with the GNU Affero General Public License in all respects
 *    for all of the code used other than as permitted herein. If you modify
 *    file(s) with this exception, you may extend this exception to your
 *    version of the file(s), but you are not obligated to do so. If you do not
 *    wish to do so, delete this exception statement from your version. If you
 *    delete this exception statement from all source files in the program,
 *    then also delete it in the license file.
 */

#include "mongo/platform/basic.h"

#include "mongo/util/net/message.h"

#include <fcntl.h>
#include <errno.h>
#include <time.h>

#include "mongo/util/net/listen.h"
#include "mongo/util/net/message_port.h"

namespace mongo {

    void Message::send( MessagingPort &p, const char *context ) {
        if ( empty() ) {
            return;
        }
        if ( _buf != 0 ) {
            p.send( _buf, MsgData::ConstView(_buf).getLen(), context );
        }
        else {
            p.send( _data, context );
        }
    }

    AtomicWord<MSGID> NextMsgId;

    /*struct MsgStart {
        MsgStart() {
            NextMsgId = (((unsigned) time(0)) << 16) ^ curTimeMillis();
            verify(MsgDataHeaderSize == 16);
        }
    } msgstart;*/

    MSGID nextMessageId() {
        return NextMsgId.fetchAndAdd(1);
    }

    bool doesOpGetAResponse( int op ) {
        return op == dbQuery || op == dbGetMore;
    }


} // namespace mongo