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#ifndef _sys_AsynchIO
#define _sys_AsynchIO
/*
*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*
*/
#include "Dispatcher.h"
#include <boost/function.hpp>
#include <deque>
namespace qpid {
namespace sys {
/*
* Asynchronous acceptor: accepts connections then does a callback with the
* accepted fd
*/
class AsynchAcceptor {
public:
typedef boost::function1<void, int> Callback;
private:
Callback acceptedCallback;
DispatchHandle handle;
public:
AsynchAcceptor(int fd, Callback callback);
void start(Poller::shared_ptr poller);
private:
void readable(DispatchHandle& handle);
};
/*
* Asycnchronous reader/writer:
* Reader accepts buffers to read into; reads into the provided buffers
* and then does a callback with the buffer and amount read. Optionally it can callback
* when there is something to read but no buffer to read it into.
*
* Writer accepts a buffer and queues it for writing; can also be given
* a callback for when writing is "idle" (ie fd is writable, but nothing to write)
*/
class AsynchIO {
public:
struct Buffer {
char* const bytes;
const int32_t byteCount;
Buffer(char* const b, const int32_t s) :
bytes(b),
byteCount(s)
{}
};
typedef boost::function2<void, const Buffer&, int32_t> ReadCallback;
typedef boost::function0<void> EofCallback;
typedef boost::function0<void> BuffersEmptyCallback;
typedef boost::function1<void, int> IdleCallback;
private:
ReadCallback readCallback;
EofCallback eofCallback;
BuffersEmptyCallback emptyCallback;
IdleCallback idleCallback;
DispatchHandle handle;
std::deque<Buffer> bufferQueue;
std::deque<Buffer> writeQueue;
public:
AsynchIO(int fd, ReadCallback rCb, EofCallback eofCb, BuffersEmptyCallback eCb = 0, IdleCallback iCb = 0);
void start(Poller::shared_ptr poller);
void QueueReadBuffer(const Buffer& buff);
void QueueWrite(const Buffer& buff);
private:
void readable(DispatchHandle& handle);
void writeable(DispatchHandle& handle);
};
}}
#endif // _sys_AsynchIO
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