/**
 * @file llioutil.cpp
 * @author Phoenix
 * @date 2005-10-05
 * @brief Utility functionality for the io pipes.
 *
 * $LicenseInfo:firstyear=2005&license=viewerlgpl$
 * Second Life Viewer Source Code
 * Copyright (C) 2010, Linden Research, Inc.
 *
 * 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;
 * version 2.1 of the License only.
 *
 * 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
 *
 * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
 * $/LicenseInfo$
 */

#include "linden_common.h"
#include "llioutil.h"
#include "llfasttimer.h"

/**
 * LLIOFlush
 */
LLIOPipe::EStatus LLIOFlush::process_impl(
    const LLChannelDescriptors& channels,
    buffer_ptr_t& buffer,
    bool& eos,
    LLSD& context,
    LLPumpIO* pump)
{
    eos = true;
    return STATUS_OK;
}


/**
 * @class LLIOSleep
 */
LLIOPipe::EStatus LLIOSleep::process_impl(
    const LLChannelDescriptors& channels,
    buffer_ptr_t& buffer,
    bool& eos,
    LLSD& context,
    LLPumpIO* pump)
{
    LL_PROFILE_ZONE_SCOPED;
    if(mSeconds > 0.0)
    {
        if(pump) pump->sleepChain(mSeconds);
        mSeconds = 0.0;
        return STATUS_BREAK;
    }
    return STATUS_DONE;
}

/**
 * @class LLIOAddChain
 */
LLIOPipe::EStatus LLIOAddChain::process_impl(
    const LLChannelDescriptors& channels,
    buffer_ptr_t& buffer,
    bool& eos,
    LLSD& context,
    LLPumpIO* pump)
{
    LL_PROFILE_ZONE_SCOPED;
    pump->addChain(mChain, mTimeout);
    return STATUS_DONE;
}

/**
 * LLChangeChannel
 */
LLChangeChannel::LLChangeChannel(S32 is, S32 becomes) :
    mIs(is),
    mBecomes(becomes)
{
}

void LLChangeChannel::operator()(LLSegment& segment)
{
    if(segment.isOnChannel(mIs))
    {
        segment.setChannel(mBecomes);
    }
}