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/**
* @file _httpservice.cpp
* @brief Internal definitions of the Http service thread
*
* $LicenseInfo:firstyear=2012&license=viewerlgpl$
* Second Life Viewer Source Code
* Copyright (C) 2012, 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 "_httpservice.h"
#include <boost/bind.hpp>
#include <boost/function.hpp>
#include "_httpoperation.h"
#include "_httprequestqueue.h"
#include "_httppolicy.h"
#include "_httplibcurl.h"
#include "_thread.h"
namespace LLCore
{
HttpService * HttpService::sInstance(NULL);
volatile HttpService::EState HttpService::sState(NOT_INITIALIZED);
HttpService::HttpService()
: mRequestQueue(NULL),
mExitRequested(false),
mThread(NULL),
mPolicy(NULL),
mTransport(NULL)
{
}
HttpService::~HttpService()
{
if (mRequestQueue)
{
mRequestQueue->release();
mRequestQueue = NULL;
}
if (mPolicy)
{
// *TODO: need a finalization here
;
}
if (mTransport)
{
// *TODO: need a finalization here
delete mTransport;
mTransport = NULL;
}
if (mPolicy)
{
delete mPolicy;
mPolicy = NULL;
}
if (mThread)
{
mThread->release();
mThread = NULL;
}
}
void HttpService::init(HttpRequestQueue * queue)
{
LLINT_ASSERT(! sInstance);
LLINT_ASSERT(NOT_INITIALIZED == sState);
sInstance = new HttpService();
queue->addRef();
sInstance->mRequestQueue = queue;
sInstance->mPolicy = new HttpPolicy(sInstance);
sInstance->mTransport = new HttpLibcurl(sInstance);
sState = INITIALIZED;
}
void HttpService::term()
{
LLINT_ASSERT(RUNNING != sState);
if (sInstance)
{
delete sInstance;
sInstance = NULL;
}
sState = NOT_INITIALIZED;
}
bool HttpService::isStopped()
{
// What is really wanted here is something like:
//
// HttpService * service = instanceOf();
// return STOPPED == sState && (! service || ! service->mThread || ! service->mThread->joinable());
//
// But boost::thread is not giving me a consistent story on joinability
// of a thread after it returns. Debug and non-debug builds are showing
// different behavior on Linux/Etch so we do a weaker test that may
// not be globally correct (i.e. thread *is* stopping, may not have
// stopped but will very soon):
return STOPPED == sState;
}
void HttpService::startThread()
{
LLINT_ASSERT(! mThread || STOPPED == sState);
LLINT_ASSERT(INITIALIZED == sState || STOPPED == sState);
if (mThread)
{
mThread->release();
}
mThread = new LLCoreInt::HttpThread(boost::bind(&HttpService::threadRun, this, _1));
mThread->addRef(); // Need an explicit reference, implicit one is used internally
sState = RUNNING;
}
void HttpService::stopRequested()
{
mExitRequested = true;
}
void HttpService::shutdown()
{
// *FIXME: Run down everything....
}
void HttpService::threadRun(LLCoreInt::HttpThread * thread)
{
boost::this_thread::disable_interruption di;
while (! mExitRequested)
{
processRequestQueue();
// Process ready queue issuing new requests as needed
mPolicy->processReadyQueue();
// Give libcurl some cycles
mTransport->processTransport();
// Determine whether to spin, sleep briefly or sleep for next request
// *FIXME: For now, do this
#if defined(WIN32)
Sleep(50);
#else
usleep(5000);
#endif
}
shutdown();
sState = STOPPED;
}
void HttpService::processRequestQueue()
{
HttpRequestQueue::OpContainer ops;
mRequestQueue->fetchAll(false, ops);
while (! ops.empty())
{
HttpOperation * op(ops.front());
ops.erase(ops.begin());
// Process operation
if (! mExitRequested)
{
op->stageFromRequest(this);
}
// Done with operation
op->release();
}
}
} // end namespace LLCore
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