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/*
* libjingle
* Copyright 2004--2010, Google Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef TALK_BASE_ASYNCSOCKET_H_
#define TALK_BASE_ASYNCSOCKET_H_
#include "talk/base/common.h"
#include "talk/base/sigslot.h"
#include "talk/base/socket.h"
namespace talk_base {
// TODO: Remove Socket and rename AsyncSocket to Socket.
// Provides the ability to perform socket I/O asynchronously.
class AsyncSocket : public Socket {
public:
AsyncSocket();
virtual ~AsyncSocket();
virtual AsyncSocket* Accept(SocketAddress* paddr) = 0;
// SignalReadEvent and SignalWriteEvent use multi_threaded_local to allow
// access concurrently from different thread.
// For example SignalReadEvent::connect will be called in AsyncUDPSocket ctor
// but at the same time the SocketDispatcher maybe signaling the read event.
// ready to read
sigslot::signal1<AsyncSocket*,
sigslot::multi_threaded_local> SignalReadEvent;
// ready to write
sigslot::signal1<AsyncSocket*,
sigslot::multi_threaded_local> SignalWriteEvent;
sigslot::signal1<AsyncSocket*> SignalConnectEvent; // connected
sigslot::signal2<AsyncSocket*, int> SignalCloseEvent; // closed
};
class AsyncSocketAdapter : public AsyncSocket, public sigslot::has_slots<> {
public:
// The adapted socket may explicitly be NULL, and later assigned using Attach.
// However, subclasses which support detached mode must override any methods
// that will be called during the detached period (usually GetState()), to
// avoid dereferencing a null pointer.
explicit AsyncSocketAdapter(AsyncSocket* socket);
virtual ~AsyncSocketAdapter();
void Attach(AsyncSocket* socket);
virtual SocketAddress GetLocalAddress() const {
return socket_->GetLocalAddress();
}
virtual SocketAddress GetRemoteAddress() const {
return socket_->GetRemoteAddress();
}
virtual int Bind(const SocketAddress& addr) {
return socket_->Bind(addr);
}
virtual int Connect(const SocketAddress& addr) {
return socket_->Connect(addr);
}
virtual int Send(const void* pv, size_t cb) {
return socket_->Send(pv, cb);
}
virtual int SendTo(const void* pv, size_t cb, const SocketAddress& addr) {
return socket_->SendTo(pv, cb, addr);
}
virtual int Recv(void* pv, size_t cb) {
return socket_->Recv(pv, cb);
}
virtual int RecvFrom(void* pv, size_t cb, SocketAddress* paddr) {
return socket_->RecvFrom(pv, cb, paddr);
}
virtual int Listen(int backlog) {
return socket_->Listen(backlog);
}
virtual AsyncSocket* Accept(SocketAddress* paddr) {
return socket_->Accept(paddr);
}
virtual int Close() {
return socket_->Close();
}
virtual int GetError() const {
return socket_->GetError();
}
virtual void SetError(int error) {
return socket_->SetError(error);
}
virtual ConnState GetState() const {
return socket_->GetState();
}
virtual int EstimateMTU(uint16* mtu) {
return socket_->EstimateMTU(mtu);
}
virtual int GetOption(Option opt, int* value) {
return socket_->GetOption(opt, value);
}
virtual int SetOption(Option opt, int value) {
return socket_->SetOption(opt, value);
}
protected:
virtual void OnConnectEvent(AsyncSocket* socket) {
SignalConnectEvent(this);
}
virtual void OnReadEvent(AsyncSocket* socket) {
SignalReadEvent(this);
}
virtual void OnWriteEvent(AsyncSocket* socket) {
SignalWriteEvent(this);
}
virtual void OnCloseEvent(AsyncSocket* socket, int err) {
SignalCloseEvent(this, err);
}
AsyncSocket* socket_;
};
} // namespace talk_base
#endif // TALK_BASE_ASYNCSOCKET_H_
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