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/**
* @file _httprequestqueue.cpp
* @brief
*
* $LicenseInfo:firstyear=2012&license=viewerlgpl$
* 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 "_httprequestqueue.h"
#include "_httpoperation.h"
#include "_mutex.h"
using namespace LLCoreInt;
namespace LLCore
{
HttpRequestQueue * HttpRequestQueue::sInstance(NULL);
HttpRequestQueue::HttpRequestQueue()
: RefCounted(true),
mQueueStopped(false)
{
}
HttpRequestQueue::~HttpRequestQueue()
{
mQueue.clear();
}
void HttpRequestQueue::init()
{
llassert_always(! sInstance);
sInstance = new HttpRequestQueue();
}
void HttpRequestQueue::term()
{
if (sInstance)
{
sInstance->release();
sInstance = NULL;
}
}
HttpStatus HttpRequestQueue::addOp(const HttpRequestQueue::opPtr_t &op)
{
bool wake(false);
{
HttpScopedLock lock(mQueueMutex);
if (mQueueStopped)
{
// Return op and error to caller
return HttpStatus(HttpStatus::LLCORE, HE_SHUTTING_DOWN);
}
wake = mQueue.empty();
mQueue.push_back(op);
}
if (wake)
{
mQueueCV.notify_all();
}
return HttpStatus();
}
HttpRequestQueue::opPtr_t HttpRequestQueue::fetchOp(bool wait)
{
HttpOperation::ptr_t result;
{
HttpScopedLock lock(mQueueMutex);
while (mQueue.empty())
{
if (! wait || mQueueStopped)
return HttpOperation::ptr_t();
mQueueCV.wait(lock);
}
result = mQueue.front();
mQueue.erase(mQueue.begin());
}
// Caller also acquires the reference count
return result;
}
void HttpRequestQueue::fetchAll(bool wait, OpContainer & ops)
{
// Not valid putting something back on the queue...
llassert_always(ops.empty());
{
HttpScopedLock lock(mQueueMutex);
while (mQueue.empty())
{
if (! wait || mQueueStopped)
return;
mQueueCV.wait(lock);
}
mQueue.swap(ops);
}
// Caller also acquires the reference counts on each op.
return;
}
void HttpRequestQueue::wakeAll()
{
mQueueCV.notify_all();
}
bool HttpRequestQueue::stopQueue()
{
{
HttpScopedLock lock(mQueueMutex);
if (!mQueueStopped)
{
mQueueStopped = true;
wakeAll();
return true;
}
wakeAll();
return false;
}
}
} // end namespace LLCore
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