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Diffstat (limited to 'src/xrespondent.hpp')
-rw-r--r-- | src/xrespondent.hpp | 123 |
1 files changed, 123 insertions, 0 deletions
diff --git a/src/xrespondent.hpp b/src/xrespondent.hpp new file mode 100644 index 0000000..eb6ac9a --- /dev/null +++ b/src/xrespondent.hpp @@ -0,0 +1,123 @@ +/* + Copyright (c) 2012 250bpm s.r.o. + Copyright (c) 2012 Other contributors as noted in the AUTHORS file + + This file is part of Crossroads I/O project. + + Crossroads I/O is free software; you can redistribute it and/or modify it + under the terms of the GNU Lesser General Public License as published by + the Free Software Foundation; either version 3 of the License, or + (at your option) any later version. + + Crossroads is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public License + along with this program. If not, see <http://www.gnu.org/licenses/>. +*/ + +#ifndef __XS_XRESPONDENT_HPP_INCLUDED__ +#define __XS_XRESPONDENT_HPP_INCLUDED__ + +#include <map> + +#include "socket_base.hpp" +#include "session_base.hpp" +#include "stdint.hpp" +#include "blob.hpp" +#include "msg.hpp" +#include "fq.hpp" + +namespace xs +{ + + class ctx_t; + class pipe_t; + class io_thread_t; + + // TODO: This class uses O(n) scheduling. Rewrite it to use O(1) algorithm. + class xrespondent_t : + public socket_base_t + { + public: + + xrespondent_t (xs::ctx_t *parent_, uint32_t tid_, int sid_); + ~xrespondent_t (); + + // Overloads of functions from socket_base_t. + void xattach_pipe (xs::pipe_t *pipe_, bool icanhasall_); + int xsend (msg_t *msg_, int flags_); + int xrecv (msg_t *msg_, int flags_); + bool xhas_in (); + bool xhas_out (); + void xread_activated (xs::pipe_t *pipe_); + void xwrite_activated (xs::pipe_t *pipe_); + void xterminated (xs::pipe_t *pipe_); + + protected: + + // Rollback any message parts that were sent but not yet flushed. + int rollback (); + + private: + + // Fair queueing object for inbound pipes. + fq_t fq; + + // This value is either 0 (nothing is prefetched), 1 (only message body + // is prefetched) or 2 (both identity and message body are prefetched). + int prefetched; + + // Holds the prefetched identity. + blob_t prefetched_id; + + // Holds the prefetched message. + msg_t prefetched_msg; + + // If true, more incoming message parts are expected. + bool more_in; + + struct outpipe_t + { + xs::pipe_t *pipe; + bool active; + }; + + // Outbound pipes indexed by the peer IDs. + typedef std::map <uint32_t, outpipe_t> outpipes_t; + outpipes_t outpipes; + + // The pipe we are currently writing to. + xs::pipe_t *current_out; + + // If true, more outgoing message parts are expected. + bool more_out; + + // Peer ID are generated. It's a simple increment and wrap-over + // algorithm. This value is the next ID to use (if not used already). + uint32_t next_peer_id; + + xrespondent_t (const xrespondent_t&); + const xrespondent_t &operator = (const xrespondent_t&); + }; + + class xrespondent_session_t : public session_base_t + { + public: + + xrespondent_session_t (xs::io_thread_t *io_thread_, bool connect_, + socket_base_t *socket_, const options_t &options_, + const char *protocol_, const char *address_); + ~xrespondent_session_t (); + + private: + + xrespondent_session_t (const xrespondent_session_t&); + const xrespondent_session_t &operator = (const xrespondent_session_t&); + }; + +} + +#endif |