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// **********************************************************************
//
// Copyright (c) 2003-2017 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_SELECTOR_H
#define ICE_SELECTOR_H
#include <IceUtil/StringUtil.h>
#include <IceUtil/Monitor.h>
#include <IceUtil/Mutex.h>
#include <Ice/Network.h>
#include <Ice/InstanceF.h>
#include <Ice/EventHandlerF.h>
#include <Ice/UniqueRef.h>
#if defined(ICE_USE_EPOLL)
# include <sys/epoll.h>
#elif defined(ICE_USE_KQUEUE)
# include <sys/event.h>
#elif defined(ICE_USE_IOCP)
// Nothing to include
#elif defined(ICE_USE_POLL)
# include <sys/poll.h>
#endif
#if defined(ICE_USE_CFSTREAM)
# include <IceUtil/RecMutex.h>
# include <IceUtil/Thread.h>
# include <set>
struct __CFRunLoop;
typedef struct __CFRunLoop * CFRunLoopRef;
struct __CFRunLoopSource;
typedef struct __CFRunLoopSource * CFRunLoopSourceRef;
struct __CFSocket;
typedef struct __CFSocket * CFSocketRef;
#endif
#if defined(ICE_OS_UWP)
# include <deque>
#endif
namespace IceInternal
{
//
// Exception raised if select times out.
//
class SelectorTimeoutException
{
};
#if defined(ICE_USE_IOCP) || defined(ICE_OS_UWP)
class Selector
{
#if defined(ICE_OS_UWP)
struct SelectEvent
{
SelectEvent(const EventHandlerPtr& handler, SocketOperation status) : handler(handler), status(status)
{
}
EventHandlerPtr handler;
SocketOperation status;
};
#endif
public:
Selector(const InstancePtr&);
~Selector();
#ifdef ICE_USE_IOCP
void setup(int);
#endif
void destroy();
void initialize(EventHandler*);
void update(EventHandler*, SocketOperation, SocketOperation);
void finish(EventHandler*);
void ready(EventHandler*, SocketOperation, bool);
#ifdef ICE_USE_IOCP
EventHandler* getNextHandler(SocketOperation&, DWORD&, int&, int);
#else
EventHandler* getNextHandler(SocketOperation&, int);
#endif
void completed(EventHandler*, SocketOperation);
private:
const InstancePtr _instance;
#ifdef ICE_USE_IOCP
HANDLE _handle;
#else
IceUtil::Monitor<IceUtil::Mutex> _monitor;
std::deque<SelectEvent> _events;
#endif
};
#elif defined(ICE_USE_KQUEUE) || defined(ICE_USE_EPOLL) || defined(ICE_USE_SELECT) || defined(ICE_USE_POLL)
class Selector
{
public:
Selector(const InstancePtr&);
~Selector();
void destroy();
void initialize(EventHandler*)
{
// Nothing to do
}
void update(EventHandler*, SocketOperation, SocketOperation);
void enable(EventHandler*, SocketOperation);
void disable(EventHandler*, SocketOperation);
bool finish(EventHandler*, bool);
void ready(EventHandler*, SocketOperation, bool);
void startSelect();
void finishSelect(std::vector<std::pair<EventHandler*, SocketOperation> >&);
void select(int);
private:
void wakeup();
void checkReady(EventHandler*);
void updateSelector();
void updateSelectorForEventHandler(EventHandler*, SocketOperation, SocketOperation);
const InstancePtr _instance;
SOCKET _fdIntrRead;
SOCKET _fdIntrWrite;
bool _interrupted;
bool _selectNow;
int _count;
bool _selecting;
std::map<EventHandlerPtr, SocketOperation> _readyHandlers;
#if defined(ICE_USE_EPOLL)
std::vector<struct epoll_event> _events;
int _queueFd;
#elif defined(ICE_USE_KQUEUE)
std::vector<struct kevent> _events;
std::vector<struct kevent> _changes;
int _queueFd;
#elif defined(ICE_USE_SELECT)
std::vector<std::pair<EventHandler*, SocketOperation> > _changes;
std::map<SOCKET, EventHandler*> _handlers;
fd_set _readFdSet;
fd_set _writeFdSet;
fd_set _errorFdSet;
fd_set _selectedReadFdSet;
fd_set _selectedWriteFdSet;
fd_set _selectedErrorFdSet;
fd_set*
fdSetCopy(fd_set& dest, fd_set& src)
{
if(src.fd_count > 0)
{
dest.fd_count = src.fd_count;
memcpy(dest.fd_array, src.fd_array, sizeof(SOCKET) * src.fd_count);
return &dest;
}
return 0;
}
#elif defined(ICE_USE_POLL)
std::vector<std::pair<EventHandler*, SocketOperation> > _changes;
std::map<SOCKET, EventHandler*> _handlers;
std::vector<struct pollfd> _pollFdSet;
#endif
};
#elif defined(ICE_USE_CFSTREAM)
class Selector;
class SelectorReadyCallback : public IceUtil::Shared
{
public:
virtual ~SelectorReadyCallback() { }
virtual void readyCallback(SocketOperation, int = 0) = 0;
};
class StreamNativeInfo : public NativeInfo
{
public:
StreamNativeInfo(SOCKET fd) : NativeInfo(fd), _connectError(0)
{
}
virtual void initStreams(SelectorReadyCallback*) = 0;
virtual SocketOperation registerWithRunLoop(SocketOperation) = 0;
virtual SocketOperation unregisterFromRunLoop(SocketOperation, bool) = 0;
virtual void closeStreams() = 0;
void setConnectError(int error)
{
_connectError = error;
}
private:
int _connectError;
};
typedef IceUtil::Handle<StreamNativeInfo> StreamNativeInfoPtr;
class EventHandlerWrapper : public SelectorReadyCallback
{
public:
EventHandlerWrapper(EventHandler*, Selector&);
~EventHandlerWrapper();
void updateRunLoop();
virtual void readyCallback(SocketOperation, int = 0);
void ready(SocketOperation, int);
SocketOperation readyOp();
bool checkReady();
bool update(SocketOperation, SocketOperation);
bool finish();
bool operator<(const EventHandlerWrapper& o)
{
return this < &o;
}
private:
friend class Selector;
EventHandlerPtr _handler;
StreamNativeInfoPtr _streamNativeInfo;
Selector& _selector;
SocketOperation _ready;
bool _finish;
IceInternal::UniqueRef<CFSocketRef> _socket;
IceInternal::UniqueRef<CFRunLoopSourceRef> _source;
};
typedef IceUtil::Handle<EventHandlerWrapper> EventHandlerWrapperPtr;
class Selector : IceUtil::Monitor<IceUtil::RecMutex>
{
public:
Selector(const InstancePtr&);
virtual ~Selector();
void destroy();
void initialize(EventHandler*);
void update(EventHandler*, SocketOperation, SocketOperation);
void enable(EventHandler*, SocketOperation);
void disable(EventHandler*, SocketOperation);
bool finish(EventHandler*, bool);
void ready(EventHandler*, SocketOperation, bool);
void startSelect();
void finishSelect(std::vector<std::pair<EventHandler*, SocketOperation> >&);
void select(int);
void processInterrupt();
void run();
private:
void ready(EventHandlerWrapper*, SocketOperation, int = 0);
void addReadyHandler(EventHandlerWrapper*);
friend class EventHandlerWrapper;
InstancePtr _instance;
IceUtil::ThreadPtr _thread;
CFRunLoopRef _runLoop;
IceInternal::UniqueRef<CFRunLoopSourceRef> _source;
bool _destroyed;
std::set<EventHandlerWrapperPtr> _changes;
std::set<EventHandlerWrapperPtr> _readyHandlers;
std::vector<std::pair<EventHandlerWrapperPtr, SocketOperation> > _selectedHandlers;
std::map<EventHandler*, EventHandlerWrapperPtr> _wrappers;
};
#endif
}
#endif
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