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/**
* @file _httpretryqueue.h
* @brief Internal declaration for the operation retry queue
*
* $LicenseInfo:firstyear=2012&license=viewerlgpl$
* 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
* $/LicenseInfo$
*/
#ifndef _LLCORE_HTTP_RETRY_QUEUE_H_
#define _LLCORE_HTTP_RETRY_QUEUE_H_
#include <queue>
#include "_httpoprequest.h"
namespace LLCore
{
/// HttpRetryQueue provides a simple priority queue for HttpOpRequest objects.
///
/// This uses the priority_queue adaptor class to provide the queue
/// as well as the ordering scheme while allowing us access to the
/// raw container if we follow a few simple rules. One of the more
/// important of those rules is that any iterator becomes invalid
/// on element erasure. So pay attention.
///
/// Threading: not thread-safe. Expected to be used entirely by
/// a single thread, typically a worker thread of some sort.
struct HttpOpRetryCompare
{
bool operator()(const HttpOpRequest * lhs, const HttpOpRequest * rhs)
{
return lhs->mPolicyRetryAt < rhs->mPolicyRetryAt;
}
};
typedef std::priority_queue<HttpOpRequest *,
std::deque<HttpOpRequest *>,
LLCore::HttpOpRetryCompare> HttpRetryQueueBase;
class HttpRetryQueue : public HttpRetryQueueBase
{
public:
HttpRetryQueue()
: HttpRetryQueueBase()
{}
~HttpRetryQueue()
{}
protected:
HttpRetryQueue(const HttpRetryQueue &); // Not defined
void operator=(const HttpRetryQueue &); // Not defined
public:
const container_type & get_container() const
{
return c;
}
container_type & get_container()
{
return c;
}
}; // end class HttpRetryQueue
} // end namespace LLCore
#endif // _LLCORE_HTTP_RETRY_QUEUE_H_
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