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// **********************************************************************
//
// Copyright (c) 2003-2009 ZeroC, Inc. All rights reserved.
//
// This copy of Ice is licensed to you under the terms described in the
// ICE_LICENSE file included in this distribution.
//
// **********************************************************************
#ifndef ICE_THREAD_POOL_H
#define ICE_THREAD_POOL_H
#include <IceUtil/Shared.h>
#include <IceUtil/Mutex.h>
#include <IceUtil/Monitor.h>
#include <IceUtil/Thread.h>
#include <Ice/Config.h>
#include <Ice/ThreadPoolF.h>
#include <Ice/InstanceF.h>
#include <Ice/LoggerF.h>
#include <Ice/PropertiesF.h>
#include <Ice/EventHandlerF.h>
#include <Ice/Selector.h>
#include <list>
namespace IceInternal
{
class BasicStream;
class ThreadPool : public IceUtil::Shared, public IceUtil::Monitor<IceUtil::Mutex>
{
public:
ThreadPool(const InstancePtr&, const std::string&, int);
virtual ~ThreadPool();
void destroy();
void incFdsInUse();
void decFdsInUse();
void _register(const EventHandlerPtr&);
void unregister(const EventHandlerPtr&);
void finish(const EventHandlerPtr&);
void execute(const ThreadPoolWorkItemPtr&);
void promoteFollower(EventHandler* = 0);
void joinWithAllThreads();
std::string prefix() const;
private:
bool run(); // Returns true if a follower should be promoted.
bool read(const EventHandlerPtr&);
InstancePtr _instance;
bool _destroyed;
const std::string _prefix;
Selector<EventHandler> _selector;
std::list<ThreadPoolWorkItemPtr> _workItems;
std::list<EventHandlerPtr> _finished;
class EventHandlerThread : public IceUtil::Thread
{
public:
EventHandlerThread(const ThreadPoolPtr&);
virtual void run();
private:
ThreadPoolPtr _pool;
};
friend class EventHandlerThread;
const int _size; // Number of threads that are pre-created.
const int _sizeMax; // Maximum number of threads.
const int _sizeWarn; // If _inUse reaches _sizeWarn, a "low on threads" warning will be printed.
const bool _serialize; // True if requests need to be serialized over the connection.
const size_t _stackSize;
std::vector<IceUtil::ThreadPtr> _threads; // All threads, running or not.
int _running; // Number of running threads.
int _inUse; // Number of threads that are currently in use.
double _load; // Current load in number of threads.
bool _promote;
const bool _warnUdp;
};
}
#endif
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