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/**
* @file networkio.h
* @author Nat Goodspeed
* @date 2009-01-09
* @brief
*
* $LicenseInfo:firstyear=2009&license=viewerlgpl$
* 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
* $/LicenseInfo$
*/
#if ! defined(LL_NETWORKIO_H)
#define LL_NETWORKIO_H
#include "llmemory.h" // LLSingleton
#include "llares.h"
#include "llpumpio.h"
#include "llhttpclient.h"
/*****************************************************************************
* NetworkIO
*****************************************************************************/
// Doing this initialization in a class constructor makes sense. But we don't
// want to redo it for each different test. Nor do we want to do it at static-
// init time. Use the lazy, on-demand initialization we get from LLSingleton.
class NetworkIO: public LLSingleton<NetworkIO>
{
public:
NetworkIO():
mServicePump(NULL),
mDone(false)
{
// Create IO Pump to use for HTTP Requests.
mServicePump = new LLPumpIO;
LLHTTPClient::setPump(*mServicePump);
if (ll_init_ares() == NULL || !gAres->isInitialized())
{
throw std::runtime_error("Can't start DNS resolver");
}
// You can interrupt pump() without waiting the full timeout duration
// by posting an event to the LLEventPump named "done".
LLEventPumps::instance().obtain("done").listen("self",
boost::bind(&NetworkIO::done, this, _1));
}
bool pump(F32 timeout=10)
{
// Reset the done flag so we don't pop out prematurely
mDone = false;
// Evidently the IO structures underlying LLHTTPClient need to be
// "pumped". Do some stuff normally performed in the viewer's main
// loop.
LLTimer timer;
while (timer.getElapsedTimeF32() < timeout)
{
if (mDone)
{
// std::cout << "NetworkIO::pump(" << timeout << "): breaking loop after "
// << timer.getElapsedTimeF32() << " seconds\n";
return true;
}
pumpOnce();
}
return false;
}
void pumpOnce()
{
gAres->process();
mServicePump->pump();
mServicePump->callback();
}
bool done(const LLSD&)
{
mDone = true;
return false;
}
private:
LLPumpIO* mServicePump;
bool mDone;
};
#endif /* ! defined(LL_NETWORKIO_H) */
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