596 lines
17 KiB
C++
596 lines
17 KiB
C++
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/*
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Copyright (c) 2009-2011 250bpm s.r.o.
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Copyright (c) 2011 Botond Ballo
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Copyright (c) 2007-2009 iMatix Corporation
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to
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deal in the Software without restriction, including without limitation the
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rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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sell copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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IN THE SOFTWARE.
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*/
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#ifndef __ZMQ_HPP_INCLUDED__
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#define __ZMQ_HPP_INCLUDED__
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#include <zmq.h>
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#include <algorithm>
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#include <cassert>
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#include <cstring>
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#include <string>
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#include <exception>
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// Detect whether the compiler supports C++11 rvalue references.
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#if (defined(__GNUC__) && (__GNUC__ > 4 || \
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(__GNUC__ == 4 && __GNUC_MINOR__ > 2)) && \
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defined(__GXX_EXPERIMENTAL_CXX0X__))
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#define ZMQ_HAS_RVALUE_REFS
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#define ZMQ_DELETED_FUNCTION = delete
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#elif defined(__clang__)
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#if __has_feature(cxx_rvalue_references)
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#define ZMQ_HAS_RVALUE_REFS
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#endif
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#if __has_feature(cxx_deleted_functions)
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#define ZMQ_DELETED_FUNCTION = delete
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#else
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#define ZMQ_DELETED_FUNCTION
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#endif
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#elif defined(_MSC_VER) && (_MSC_VER >= 1600)
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#define ZMQ_HAS_RVALUE_REFS
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#define ZMQ_DELETED_FUNCTION
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#else
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#define ZMQ_DELETED_FUNCTION
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#endif
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#if ZMQ_VERSION >= ZMQ_MAKE_VERSION(3, 3, 0)
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#define ZMQ_NEW_MONITOR_EVENT_LAYOUT
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#endif
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#if ZMQ_VERSION >= ZMQ_MAKE_VERSION(4, 1, 0)
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#define ZMQ_HAS_PROXY_STEERABLE
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/* Socket event data */
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typedef struct {
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uint16_t event; // id of the event as bitfield
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int32_t value ; // value is either error code, fd or reconnect interval
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} zmq_event_t;
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#endif
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// In order to prevent unused variable warnings when building in non-debug
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// mode use this macro to make assertions.
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#ifndef NDEBUG
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# define ZMQ_ASSERT(expression) assert(expression)
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#else
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# define ZMQ_ASSERT(expression) (void)(expression)
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#endif
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namespace zmq
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{
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typedef zmq_free_fn free_fn;
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typedef zmq_pollitem_t pollitem_t;
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class error_t : public std::exception
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{
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public:
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error_t () : errnum (zmq_errno ()) {}
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virtual const char *what () const throw ()
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{
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return zmq_strerror (errnum);
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}
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int num () const
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{
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return errnum;
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}
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private:
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int errnum;
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};
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inline int poll (zmq_pollitem_t *items_, int nitems_, long timeout_ = -1)
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{
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int rc = zmq_poll (items_, nitems_, timeout_);
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if (rc < 0)
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throw error_t ();
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return rc;
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}
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inline void proxy (void *frontend, void *backend, void *capture)
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{
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int rc = zmq_proxy (frontend, backend, capture);
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if (rc != 0)
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throw error_t ();
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}
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#ifdef ZMQ_HAS_PROXY_STEERABLE
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inline void proxy_steerable (void *frontend, void *backend, void *capture, void *control)
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{
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int rc = zmq_proxy_steerable (frontend, backend, capture, control);
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if (rc != 0)
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throw error_t ();
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}
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#endif
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inline void version (int *major_, int *minor_, int *patch_)
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{
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zmq_version (major_, minor_, patch_);
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}
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class message_t
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{
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friend class socket_t;
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public:
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inline message_t ()
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{
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int rc = zmq_msg_init (&msg);
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if (rc != 0)
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throw error_t ();
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}
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inline explicit message_t (size_t size_)
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{
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int rc = zmq_msg_init_size (&msg, size_);
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if (rc != 0)
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throw error_t ();
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}
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inline message_t (void *data_, size_t size_, free_fn *ffn_,
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void *hint_ = NULL)
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{
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int rc = zmq_msg_init_data (&msg, data_, size_, ffn_, hint_);
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if (rc != 0)
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throw error_t ();
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}
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#ifdef ZMQ_HAS_RVALUE_REFS
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inline message_t (message_t &&rhs) : msg (rhs.msg)
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{
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int rc = zmq_msg_init (&rhs.msg);
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if (rc != 0)
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throw error_t ();
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}
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inline message_t &operator = (message_t &&rhs)
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{
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std::swap (msg, rhs.msg);
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return *this;
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}
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#endif
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inline ~message_t ()
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{
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int rc = zmq_msg_close (&msg);
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ZMQ_ASSERT (rc == 0);
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}
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inline void rebuild ()
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{
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int rc = zmq_msg_close (&msg);
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if (rc != 0)
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throw error_t ();
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rc = zmq_msg_init (&msg);
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if (rc != 0)
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throw error_t ();
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}
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inline void rebuild (size_t size_)
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{
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int rc = zmq_msg_close (&msg);
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if (rc != 0)
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throw error_t ();
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rc = zmq_msg_init_size (&msg, size_);
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if (rc != 0)
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throw error_t ();
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}
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inline void rebuild (void *data_, size_t size_, free_fn *ffn_,
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void *hint_ = NULL)
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{
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int rc = zmq_msg_close (&msg);
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if (rc != 0)
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throw error_t ();
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rc = zmq_msg_init_data (&msg, data_, size_, ffn_, hint_);
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if (rc != 0)
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throw error_t ();
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}
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inline void move (message_t *msg_)
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{
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int rc = zmq_msg_move (&msg, &(msg_->msg));
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if (rc != 0)
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throw error_t ();
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}
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inline void copy (message_t *msg_)
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{
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int rc = zmq_msg_copy (&msg, &(msg_->msg));
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if (rc != 0)
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throw error_t ();
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}
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inline bool more ()
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{
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int rc = zmq_msg_more (&msg);
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return rc != 0;
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}
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inline void *data ()
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{
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return zmq_msg_data (&msg);
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}
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inline const void* data () const
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{
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return zmq_msg_data (const_cast<zmq_msg_t*>(&msg));
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}
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inline size_t size () const
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{
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return zmq_msg_size (const_cast<zmq_msg_t*>(&msg));
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}
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private:
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// The underlying message
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zmq_msg_t msg;
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// Disable implicit message copying, so that users won't use shared
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// messages (less efficient) without being aware of the fact.
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message_t (const message_t&);
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void operator = (const message_t&);
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};
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class context_t
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{
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friend class socket_t;
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public:
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inline context_t ()
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{
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ptr = zmq_ctx_new ();
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if (ptr == NULL)
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throw error_t ();
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}
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inline explicit context_t (int io_threads_, int max_sockets_ = ZMQ_MAX_SOCKETS_DFLT)
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{
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ptr = zmq_ctx_new ();
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if (ptr == NULL)
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throw error_t ();
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int rc = zmq_ctx_set (ptr, ZMQ_IO_THREADS, io_threads_);
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ZMQ_ASSERT (rc == 0);
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rc = zmq_ctx_set (ptr, ZMQ_MAX_SOCKETS, max_sockets_);
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ZMQ_ASSERT (rc == 0);
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}
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#ifdef ZMQ_HAS_RVALUE_REFS
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inline context_t (context_t &&rhs) : ptr (rhs.ptr)
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{
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rhs.ptr = NULL;
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}
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inline context_t &operator = (context_t &&rhs)
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{
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std::swap (ptr, rhs.ptr);
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return *this;
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}
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#endif
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inline ~context_t ()
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{
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close();
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}
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inline void close()
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{
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if (ptr == NULL)
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return;
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int rc = zmq_ctx_destroy (ptr);
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ZMQ_ASSERT (rc == 0);
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ptr = NULL;
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}
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// Be careful with this, it's probably only useful for
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// using the C api together with an existing C++ api.
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// Normally you should never need to use this.
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inline operator void* ()
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{
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return ptr;
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}
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private:
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void *ptr;
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context_t (const context_t&);
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void operator = (const context_t&);
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};
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class socket_t
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{
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friend class monitor_t;
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public:
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inline socket_t (context_t &context_, int type_)
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{
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ctxptr = context_.ptr;
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ptr = zmq_socket (context_.ptr, type_);
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if (ptr == NULL)
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throw error_t ();
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}
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#ifdef ZMQ_HAS_RVALUE_REFS
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inline socket_t(socket_t&& rhs) : ptr(rhs.ptr)
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{
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rhs.ptr = NULL;
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}
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inline socket_t& operator=(socket_t&& rhs)
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{
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std::swap(ptr, rhs.ptr);
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return *this;
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}
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#endif
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inline ~socket_t ()
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{
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close();
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}
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inline operator void* ()
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{
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return ptr;
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}
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inline void close()
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{
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if(ptr == NULL)
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// already closed
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return ;
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int rc = zmq_close (ptr);
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ZMQ_ASSERT (rc == 0);
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ptr = 0 ;
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}
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inline void setsockopt (int option_, const void *optval_,
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size_t optvallen_)
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{
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int rc = zmq_setsockopt (ptr, option_, optval_, optvallen_);
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if (rc != 0)
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throw error_t ();
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}
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inline void getsockopt (int option_, void *optval_,
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size_t *optvallen_)
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{
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int rc = zmq_getsockopt (ptr, option_, optval_, optvallen_);
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if (rc != 0)
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throw error_t ();
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}
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inline void bind (const char *addr_)
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{
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int rc = zmq_bind (ptr, addr_);
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if (rc != 0)
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throw error_t ();
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}
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inline void unbind (const char *addr_)
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{
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int rc = zmq_unbind (ptr, addr_);
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if (rc != 0)
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throw error_t ();
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}
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inline void connect (const char *addr_)
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{
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int rc = zmq_connect (ptr, addr_);
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if (rc != 0)
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throw error_t ();
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}
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inline void disconnect (const char *addr_)
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{
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int rc = zmq_disconnect (ptr, addr_);
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|
|
if (rc != 0)
|
||
|
|
throw error_t ();
|
||
|
|
}
|
||
|
|
|
||
|
|
inline bool connected()
|
||
|
|
{
|
||
|
|
return(ptr != NULL);
|
||
|
|
}
|
||
|
|
|
||
|
|
inline size_t send (const void *buf_, size_t len_, int flags_ = 0)
|
||
|
|
{
|
||
|
|
int nbytes = zmq_send (ptr, buf_, len_, flags_);
|
||
|
|
if (nbytes >= 0)
|
||
|
|
return (size_t) nbytes;
|
||
|
|
if (zmq_errno () == EAGAIN)
|
||
|
|
return 0;
|
||
|
|
throw error_t ();
|
||
|
|
}
|
||
|
|
|
||
|
|
inline bool send (message_t &msg_, int flags_ = 0)
|
||
|
|
{
|
||
|
|
int nbytes = zmq_msg_send (&(msg_.msg), ptr, flags_);
|
||
|
|
if (nbytes >= 0)
|
||
|
|
return true;
|
||
|
|
if (zmq_errno () == EAGAIN)
|
||
|
|
return false;
|
||
|
|
throw error_t ();
|
||
|
|
}
|
||
|
|
|
||
|
|
inline size_t recv (void *buf_, size_t len_, int flags_ = 0)
|
||
|
|
{
|
||
|
|
int nbytes = zmq_recv (ptr, buf_, len_, flags_);
|
||
|
|
if (nbytes >= 0)
|
||
|
|
return (size_t) nbytes;
|
||
|
|
if (zmq_errno () == EAGAIN)
|
||
|
|
return 0;
|
||
|
|
throw error_t ();
|
||
|
|
}
|
||
|
|
|
||
|
|
inline bool recv (message_t *msg_, int flags_ = 0)
|
||
|
|
{
|
||
|
|
int nbytes = zmq_msg_recv (&(msg_->msg), ptr, flags_);
|
||
|
|
if (nbytes >= 0)
|
||
|
|
return true;
|
||
|
|
if (zmq_errno () == EAGAIN)
|
||
|
|
return false;
|
||
|
|
throw error_t ();
|
||
|
|
}
|
||
|
|
|
||
|
|
private:
|
||
|
|
void *ptr;
|
||
|
|
void *ctxptr;
|
||
|
|
|
||
|
|
socket_t (const socket_t&) ZMQ_DELETED_FUNCTION;
|
||
|
|
void operator = (const socket_t&) ZMQ_DELETED_FUNCTION;
|
||
|
|
};
|
||
|
|
|
||
|
|
class monitor_t
|
||
|
|
{
|
||
|
|
public:
|
||
|
|
monitor_t() : socketPtr(NULL) {}
|
||
|
|
virtual ~monitor_t() {}
|
||
|
|
|
||
|
|
void monitor(socket_t &socket, const char *addr_, int events = ZMQ_EVENT_ALL)
|
||
|
|
{
|
||
|
|
int rc = zmq_socket_monitor(socket.ptr, addr_, events);
|
||
|
|
if (rc != 0)
|
||
|
|
throw error_t ();
|
||
|
|
|
||
|
|
socketPtr = socket.ptr;
|
||
|
|
void *s = zmq_socket (socket.ctxptr, ZMQ_PAIR);
|
||
|
|
assert (s);
|
||
|
|
|
||
|
|
rc = zmq_connect (s, addr_);
|
||
|
|
assert (rc == 0);
|
||
|
|
|
||
|
|
on_monitor_started();
|
||
|
|
|
||
|
|
while (true) {
|
||
|
|
zmq_msg_t eventMsg;
|
||
|
|
zmq_msg_init (&eventMsg);
|
||
|
|
rc = zmq_recvmsg (s, &eventMsg, 0);
|
||
|
|
if (rc == -1 && zmq_errno() == ETERM)
|
||
|
|
break;
|
||
|
|
assert (rc != -1);
|
||
|
|
#if ZMQ_VERSION_MAJOR >= 4
|
||
|
|
const char* data = static_cast<const char*>(zmq_msg_data(&eventMsg));
|
||
|
|
zmq_event_t msgEvent;
|
||
|
|
msgEvent.event = *(uint16_t*)data; data += sizeof(uint16_t);
|
||
|
|
msgEvent.value = *(int32_t*)data;
|
||
|
|
zmq_event_t* event = &msgEvent;
|
||
|
|
#else
|
||
|
|
zmq_event_t* event = static_cast<zmq_event_t*>(zmq_msg_data(&eventMsg));
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#ifdef ZMQ_NEW_MONITOR_EVENT_LAYOUT
|
||
|
|
zmq_msg_t addrMsg;
|
||
|
|
zmq_msg_init (&addrMsg);
|
||
|
|
rc = zmq_recvmsg (s, &addrMsg, 0);
|
||
|
|
if (rc == -1 && zmq_errno() == ETERM)
|
||
|
|
break;
|
||
|
|
assert (rc != -1);
|
||
|
|
const char* str = static_cast<const char*>(zmq_msg_data (&addrMsg));
|
||
|
|
std::string address(str, str + zmq_msg_size(&addrMsg));
|
||
|
|
zmq_msg_close (&addrMsg);
|
||
|
|
#else
|
||
|
|
// Bit of a hack, but all events in the zmq_event_t union have the same layout so this will work for all event types.
|
||
|
|
std::string address = event->data.connected.addr;
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#ifdef ZMQ_EVENT_MONITOR_STOPPED
|
||
|
|
if (event->event == ZMQ_EVENT_MONITOR_STOPPED)
|
||
|
|
break;
|
||
|
|
#endif
|
||
|
|
|
||
|
|
switch (event->event) {
|
||
|
|
case ZMQ_EVENT_CONNECTED:
|
||
|
|
on_event_connected(*event, address.c_str());
|
||
|
|
break;
|
||
|
|
case ZMQ_EVENT_CONNECT_DELAYED:
|
||
|
|
on_event_connect_delayed(*event, address.c_str());
|
||
|
|
break;
|
||
|
|
case ZMQ_EVENT_CONNECT_RETRIED:
|
||
|
|
on_event_connect_retried(*event, address.c_str());
|
||
|
|
break;
|
||
|
|
case ZMQ_EVENT_LISTENING:
|
||
|
|
on_event_listening(*event, address.c_str());
|
||
|
|
break;
|
||
|
|
case ZMQ_EVENT_BIND_FAILED:
|
||
|
|
on_event_bind_failed(*event, address.c_str());
|
||
|
|
break;
|
||
|
|
case ZMQ_EVENT_ACCEPTED:
|
||
|
|
on_event_accepted(*event, address.c_str());
|
||
|
|
break;
|
||
|
|
case ZMQ_EVENT_ACCEPT_FAILED:
|
||
|
|
on_event_accept_failed(*event, address.c_str());
|
||
|
|
break;
|
||
|
|
case ZMQ_EVENT_CLOSED:
|
||
|
|
on_event_closed(*event, address.c_str());
|
||
|
|
break;
|
||
|
|
case ZMQ_EVENT_CLOSE_FAILED:
|
||
|
|
on_event_close_failed(*event, address.c_str());
|
||
|
|
break;
|
||
|
|
case ZMQ_EVENT_DISCONNECTED:
|
||
|
|
on_event_disconnected(*event, address.c_str());
|
||
|
|
break;
|
||
|
|
default:
|
||
|
|
on_event_unknown(*event, address.c_str());
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
zmq_msg_close (&eventMsg);
|
||
|
|
}
|
||
|
|
zmq_close (s);
|
||
|
|
socketPtr = NULL;
|
||
|
|
}
|
||
|
|
|
||
|
|
#ifdef ZMQ_EVENT_MONITOR_STOPPED
|
||
|
|
void abort()
|
||
|
|
{
|
||
|
|
if (socketPtr)
|
||
|
|
zmq_socket_monitor(socketPtr, NULL, 0);
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
virtual void on_monitor_started() {}
|
||
|
|
virtual void on_event_connected(const zmq_event_t &event_, const char* addr_) { (void)event_; (void)addr_; }
|
||
|
|
virtual void on_event_connect_delayed(const zmq_event_t &event_, const char* addr_) { (void)event_; (void)addr_; }
|
||
|
|
virtual void on_event_connect_retried(const zmq_event_t &event_, const char* addr_) { (void)event_; (void)addr_; }
|
||
|
|
virtual void on_event_listening(const zmq_event_t &event_, const char* addr_) { (void)event_; (void)addr_; }
|
||
|
|
virtual void on_event_bind_failed(const zmq_event_t &event_, const char* addr_) { (void)event_; (void)addr_; }
|
||
|
|
virtual void on_event_accepted(const zmq_event_t &event_, const char* addr_) { (void)event_; (void)addr_; }
|
||
|
|
virtual void on_event_accept_failed(const zmq_event_t &event_, const char* addr_) { (void)event_; (void)addr_; }
|
||
|
|
virtual void on_event_closed(const zmq_event_t &event_, const char* addr_) { (void)event_; (void)addr_; }
|
||
|
|
virtual void on_event_close_failed(const zmq_event_t &event_, const char* addr_) { (void)event_; (void)addr_; }
|
||
|
|
virtual void on_event_disconnected(const zmq_event_t &event_, const char* addr_) { (void)event_; (void)addr_; }
|
||
|
|
virtual void on_event_unknown(const zmq_event_t &event_, const char* addr_) { (void)event_; (void)addr_; }
|
||
|
|
private:
|
||
|
|
void* socketPtr;
|
||
|
|
};
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif
|