516 lines
12 KiB
C++
516 lines
12 KiB
C++
/* $Id$ */
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/*
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* Copyright (C) 2008-2009 Teluu Inc. (http://www.teluu.com)
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* Copyright (C) 2003-2008 Benny Prijono <benny@prijono.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#ifndef __PJPP_PROACTOR_HPP__
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#define __PJPP_PROACTOR_HPP__
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#include <pj/ioqueue.h>
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#include <pj++/pool.hpp>
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#include <pj++/sock.hpp>
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#include <pj++/timer.hpp>
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#include <pj/errno.h>
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class Pj_Proactor;
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class Pj_Event_Handler;
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//////////////////////////////////////////////////////////////////////////////
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// Asynchronous operation key.
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//
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// Applications may inheric this class to put their application
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// specific data.
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//
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class Pj_Async_Op : public pj_ioqueue_op_key_t
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{
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public:
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//
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// Construct with null handler.
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// App must call set_handler() before use.
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//
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Pj_Async_Op()
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: handler_(NULL)
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{
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pj_ioqueue_op_key_init(this, sizeof(*this));
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}
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//
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// Constructor.
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//
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explicit Pj_Async_Op(Pj_Event_Handler *handler)
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: handler_(handler)
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{
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pj_ioqueue_op_key_init(this, sizeof(*this));
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}
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//
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// Set handler.
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//
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void set_handler(Pj_Event_Handler *handler)
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{
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handler_ = handler;
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}
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//
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// Check whether operation is still pending for this key.
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//
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bool is_pending();
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//
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// Cancel the operation.
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//
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bool cancel(pj_ssize_t bytes_status=-PJ_ECANCELLED);
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protected:
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Pj_Event_Handler *handler_;
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};
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//////////////////////////////////////////////////////////////////////////////
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// Event handler.
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//
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// Applications should inherit this class to receive various event
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// notifications.
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//
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// Applications should implement get_socket_handle().
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//
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class Pj_Event_Handler : public Pj_Object
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{
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friend class Pj_Proactor;
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public:
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//
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// Default constructor.
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//
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Pj_Event_Handler()
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: key_(NULL)
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{
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pj_memset(&timer_, 0, sizeof(timer_));
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timer_.user_data = this;
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timer_.cb = &timer_callback;
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}
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//
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// Destroy.
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//
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virtual ~Pj_Event_Handler()
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{
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unregister();
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}
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//
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// Unregister this handler from the ioqueue.
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//
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void unregister()
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{
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if (key_) {
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pj_ioqueue_unregister(key_);
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key_ = NULL;
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}
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}
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//
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// Get socket handle associated with this.
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//
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virtual pj_sock_t get_socket_handle()
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{
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return PJ_INVALID_SOCKET;
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}
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//
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// Start async receive.
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//
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pj_status_t recv( Pj_Async_Op *op_key,
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void *buf, pj_ssize_t *len,
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unsigned flags)
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{
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return pj_ioqueue_recv( key_, op_key,
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buf, len, flags);
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}
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//
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// Start async recvfrom()
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//
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pj_status_t recvfrom( Pj_Async_Op *op_key,
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void *buf, pj_ssize_t *len, unsigned flags,
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Pj_Inet_Addr *addr)
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{
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addr->addrlen_ = sizeof(Pj_Inet_Addr);
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return pj_ioqueue_recvfrom( key_, op_key, buf, len, flags,
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addr, &addr->addrlen_ );
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}
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//
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// Start async send()
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//
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pj_status_t send( Pj_Async_Op *op_key,
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const void *data, pj_ssize_t *len,
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unsigned flags)
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{
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return pj_ioqueue_send( key_, op_key, data, len, flags);
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}
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//
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// Start async sendto()
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//
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pj_status_t sendto( Pj_Async_Op *op_key,
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const void *data, pj_ssize_t *len, unsigned flags,
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const Pj_Inet_Addr &addr)
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{
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return pj_ioqueue_sendto(key_, op_key, data, len, flags,
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&addr, sizeof(addr));
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}
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#if PJ_HAS_TCP
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//
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// Start async connect()
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//
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pj_status_t connect(const Pj_Inet_Addr &addr)
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{
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return pj_ioqueue_connect(key_, &addr, sizeof(addr));
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}
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//
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// Start async accept().
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//
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pj_status_t accept( Pj_Async_Op *op_key,
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Pj_Socket *sock,
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Pj_Inet_Addr *local = NULL,
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Pj_Inet_Addr *remote = NULL)
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{
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int *addrlen = local ? &local->addrlen_ : NULL;
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return pj_ioqueue_accept( key_, op_key, &sock->sock_,
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local, remote, addrlen );
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}
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#endif
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protected:
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//////////////////
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// Overridables
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//////////////////
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//
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// Timeout callback.
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//
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virtual void on_timeout(int)
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{
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}
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//
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// On read complete callback.
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//
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virtual void on_read_complete( Pj_Async_Op*, pj_ssize_t)
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{
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}
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//
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// On write complete callback.
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//
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virtual void on_write_complete( Pj_Async_Op *, pj_ssize_t)
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{
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}
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#if PJ_HAS_TCP
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//
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// On connect complete callback.
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//
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virtual void on_connect_complete(pj_status_t)
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{
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}
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//
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// On new connection callback.
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//
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virtual void on_accept_complete( Pj_Async_Op*, pj_sock_t, pj_status_t)
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{
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}
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#endif
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private:
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pj_ioqueue_key_t *key_;
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pj_timer_entry timer_;
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friend class Pj_Proactor;
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friend class Pj_Async_Op;
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//
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// Static timer callback.
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//
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static void timer_callback( pj_timer_heap_t*,
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struct pj_timer_entry *entry)
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{
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Pj_Event_Handler *handler =
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(Pj_Event_Handler*) entry->user_data;
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handler->on_timeout(entry->id);
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}
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};
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inline bool Pj_Async_Op::is_pending()
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{
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return pj_ioqueue_is_pending(handler_->key_, this) != 0;
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}
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inline bool Pj_Async_Op::cancel(pj_ssize_t bytes_status)
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{
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return pj_ioqueue_post_completion(handler_->key_, this,
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bytes_status) == PJ_SUCCESS;
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}
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//////////////////////////////////////////////////////////////////////////////
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// Proactor
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//
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class Pj_Proactor : public Pj_Object
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{
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public:
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//
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// Default constructor, initializes to NULL.
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//
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Pj_Proactor()
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: ioq_(NULL), th_(NULL)
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{
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cb_.on_read_complete = &read_complete_cb;
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cb_.on_write_complete = &write_complete_cb;
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cb_.on_accept_complete = &accept_complete_cb;
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cb_.on_connect_complete = &connect_complete_cb;
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}
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//
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// Construct proactor.
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//
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Pj_Proactor( Pj_Pool *pool, pj_size_t max_fd,
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pj_size_t max_timer_entries )
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: ioq_(NULL), th_(NULL)
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{
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cb_.on_read_complete = &read_complete_cb;
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cb_.on_write_complete = &write_complete_cb;
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cb_.on_accept_complete = &accept_complete_cb;
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cb_.on_connect_complete = &connect_complete_cb;
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create(pool, max_fd, max_timer_entries);
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}
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//
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// Destructor.
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//
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~Pj_Proactor()
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{
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destroy();
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}
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//
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// Create proactor.
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//
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pj_status_t create( Pj_Pool *pool, pj_size_t max_fd,
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pj_size_t timer_entry_count)
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{
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pj_status_t status;
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destroy();
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status = pj_ioqueue_create(pool->pool_(), max_fd, &ioq_);
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if (status != PJ_SUCCESS)
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return status;
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status = pj_timer_heap_create(pool->pool_(),
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timer_entry_count, &th_);
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if (status != PJ_SUCCESS) {
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pj_ioqueue_destroy(ioq_);
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ioq_ = NULL;
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return NULL;
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}
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return status;
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}
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//
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// Destroy proactor.
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//
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void destroy()
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{
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if (ioq_) {
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pj_ioqueue_destroy(ioq_);
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ioq_ = NULL;
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}
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if (th_) {
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pj_timer_heap_destroy(th_);
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th_ = NULL;
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}
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}
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//
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// Register handler.
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// This will call handler->get_socket_handle()
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//
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pj_status_t register_socket_handler(Pj_Pool *pool,
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Pj_Event_Handler *handler)
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{
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return pj_ioqueue_register_sock( pool->pool_(), ioq_,
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handler->get_socket_handle(),
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handler, &cb_, &handler->key_ );
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}
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//
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// Unregister handler.
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//
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static void unregister_handler(Pj_Event_Handler *handler)
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{
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if (handler->key_) {
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pj_ioqueue_unregister( handler->key_ );
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handler->key_ = NULL;
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}
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}
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//
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// Scheduler timer.
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//
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bool schedule_timer( Pj_Event_Handler *handler,
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const Pj_Time_Val &delay,
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int id=-1)
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{
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return schedule_timer(th_, handler, delay, id);
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}
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//
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// Cancel timer.
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//
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bool cancel_timer(Pj_Event_Handler *handler)
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{
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return pj_timer_heap_cancel(th_, &handler->timer_) == 1;
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}
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//
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// Handle events.
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//
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int handle_events(Pj_Time_Val *max_timeout)
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{
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Pj_Time_Val timeout(0, 0);
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int timer_count;
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timer_count = pj_timer_heap_poll( th_, &timeout );
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if (timeout.get_sec() < 0)
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timeout.sec = PJ_MAXINT32;
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/* If caller specifies maximum time to wait, then compare the value
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* with the timeout to wait from timer, and use the minimum value.
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*/
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if (max_timeout && timeout >= *max_timeout) {
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timeout = *max_timeout;
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}
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/* Poll events in ioqueue. */
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int ioqueue_count;
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ioqueue_count = pj_ioqueue_poll(ioq_, &timeout);
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if (ioqueue_count < 0)
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return ioqueue_count;
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return ioqueue_count + timer_count;
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}
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//
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// Get the internal ioqueue object.
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//
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pj_ioqueue_t *get_io_queue()
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{
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return ioq_;
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}
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//
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// Get the internal timer heap object.
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//
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pj_timer_heap_t *get_timer_heap()
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{
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return th_;
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}
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private:
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pj_ioqueue_t *ioq_;
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pj_timer_heap_t *th_;
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pj_ioqueue_callback cb_;
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static bool schedule_timer( pj_timer_heap_t *timer,
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Pj_Event_Handler *handler,
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const Pj_Time_Val &delay,
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int id=-1)
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{
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handler->timer_.id = id;
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return pj_timer_heap_schedule(timer, &handler->timer_, &delay) == 0;
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}
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//
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// Static read completion callback.
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//
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static void read_complete_cb( pj_ioqueue_key_t *key,
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pj_ioqueue_op_key_t *op_key,
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pj_ssize_t bytes_read)
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{
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Pj_Event_Handler *handler =
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(Pj_Event_Handler*) pj_ioqueue_get_user_data(key);
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handler->on_read_complete((Pj_Async_Op*)op_key, bytes_read);
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}
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//
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// Static write completion callback.
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//
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static void write_complete_cb(pj_ioqueue_key_t *key,
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pj_ioqueue_op_key_t *op_key,
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pj_ssize_t bytes_sent)
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{
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Pj_Event_Handler *handler =
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(Pj_Event_Handler*) pj_ioqueue_get_user_data(key);
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handler->on_write_complete((Pj_Async_Op*)op_key, bytes_sent);
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}
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//
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// Static accept completion callback.
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//
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static void accept_complete_cb(pj_ioqueue_key_t *key,
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pj_ioqueue_op_key_t *op_key,
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pj_sock_t new_sock,
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pj_status_t status)
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{
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Pj_Event_Handler *handler =
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(Pj_Event_Handler*) pj_ioqueue_get_user_data(key);
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handler->on_accept_complete((Pj_Async_Op*)op_key, new_sock, status);
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}
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//
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// Static connect completion callback.
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//
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static void connect_complete_cb(pj_ioqueue_key_t *key,
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pj_status_t status)
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{
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Pj_Event_Handler *handler =
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(Pj_Event_Handler*) pj_ioqueue_get_user_data(key);
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handler->on_connect_complete(status);
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}
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};
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#endif /* __PJPP_PROACTOR_HPP__ */
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