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/**
* @file _httppolicy.h
* @brief Declarations for internal class enforcing policy decisions.
*
* $LicenseInfo:firstyear=2012&license=viewerlgpl$
* 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_POLICY_H_
#define _LLCORE_HTTP_POLICY_H_
#include "httprequest.h"
#include "_httpservice.h"
#include "_httpreadyqueue.h"
#include "_httppolicyglobal.h"
namespace LLCore
{
class HttpReadyQueue;
class HttpOpRequest;
/// Implements class-based queuing policies for an HttpService instance.
///
/// Threading: Single-threaded. Other than for construction/destruction,
/// all methods are expected to be invoked in a single thread, typically
/// a worker thread of some sort.
class HttpPolicy
{
public:
HttpPolicy(HttpService *);
virtual ~HttpPolicy();
private:
HttpPolicy(const HttpPolicy &); // Not defined
void operator=(const HttpPolicy &); // Not defined
public:
/// Give the policy layer some cycles to scan the ready
/// queue promoting higher-priority requests to active
/// as permited.
HttpService::ELoopSpeed processReadyQueue();
/// Add request to a ready queue. Caller is expected to have
/// provided us with a reference count to hold the request. (No
/// additional references will be added.)
void addOp(HttpOpRequest *);
// Shadows HttpService's method
bool changePriority(HttpHandle handle, HttpRequest::priority_t priority);
// Get pointer to global policy options. Caller is expected
// to do context checks like no setting once running.
HttpPolicyGlobal & getGlobalOptions()
{
return mGlobalOptions;
}
protected:
int mReadyInClass[HttpRequest::POLICY_CLASS_LIMIT];
HttpReadyQueue mReadyQueue[HttpRequest::POLICY_CLASS_LIMIT];
HttpService * mService; // Naked pointer, not refcounted, not owner
HttpPolicyGlobal mGlobalOptions;
}; // end class HttpPolicy
} // end namespace LLCore
#endif // _LLCORE_HTTP_POLICY_H_
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