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/**
* @file llcoproceduremanager.h
* @author Rider Linden
* @brief Singleton class for managing asset uploads to the sim.
*
* $LicenseInfo:firstyear=2015&license=viewerlgpl$
* Second Life Viewer Source Code
* Copyright (C) 2015, 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 LL_COPROCEDURE_MANAGER_H
#define LL_COPROCEDURE_MANAGER_H
#include "lleventcoro.h"
#include "llcoros.h"
#include "llcorehttputil.h"
#include "lluuid.h"
class LLCoprocedureManager : public LLSingleton < LLCoprocedureManager >
{
public:
typedef boost::function<void(LLCoros::self &, LLCoreHttpUtil::HttpCoroutineAdapter::ptr_t &, const LLUUID &id)> CoProcedure_t;
LLCoprocedureManager();
virtual ~LLCoprocedureManager();
/// Places the coprocedure on the queue for processing.
///
/// @param name Is used for debugging and should identify this coroutine.
/// @param proc Is a bound function to be executed
///
/// @return This method returns a UUID that can be used later to cancel execution.
LLUUID enqueueCoprocedure(const std::string &name, CoProcedure_t proc);
/// Cancel a coprocedure. If the coprocedure is already being actively executed
/// this method calls cancelYieldingOperation() on the associated HttpAdapter
/// If it has not yet been dequeued it is simply removed from the queue.
void cancelCoprocedure(const LLUUID &id);
/// Requests a shutdown of the upload manager. Passing 'true' will perform
/// an immediate kill on the upload coroutine.
void shutdown(bool hardShutdown = false);
/// Returns the number of coprocedures in the queue awaiting processing.
///
inline size_t countPending() const
{
return mPendingCoprocs.size();
}
/// Returns the number of coprocedures actively being processed.
///
inline size_t countActive() const
{
return mActiveCoprocs.size();
}
/// Returns the total number of coprocedures either queued or in active processing.
///
inline size_t count() const
{
return countPending() + countActive();
}
private:
struct QueuedCoproc
{
typedef boost::shared_ptr<QueuedCoproc> ptr_t;
QueuedCoproc(const std::string &name, const LLUUID &id, CoProcedure_t proc):
mName(name),
mId(id),
mProc(proc)
{}
std::string mName;
LLUUID mId;
CoProcedure_t mProc;
};
// we use a deque here rather than std::queue since we want to be able to
// iterate through the queue and potentially erase an entry from the middle.
typedef std::deque<QueuedCoproc::ptr_t> CoprocQueue_t;
typedef std::map<LLUUID, LLCoreHttpUtil::HttpCoroutineAdapter::ptr_t> ActiveCoproc_t;
CoprocQueue_t mPendingCoprocs;
ActiveCoproc_t mActiveCoprocs;
bool mShutdown;
LLEventStream mWakeupTrigger;
typedef std::map<std::string, LLCoreHttpUtil::HttpCoroutineAdapter::ptr_t> CoroAdapterMap_t;
LLCore::HttpRequest::policy_t mHTTPPolicy;
CoroAdapterMap_t mCoroMapping;
void coprocedureInvokerCoro(LLCoros::self& self, LLCoreHttpUtil::HttpCoroutineAdapter::ptr_t httpAdapter);
};
#endif
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