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+/*
+ Copyright (c) 2009-2011 250bpm s.r.o.
+ Copyright (c) 2011 Botond Ballo
+ Copyright (c) 2007-2009 iMatix Corporation
+
+ Permission is hereby granted, free of charge, to any person obtaining a copy
+ of this software and associated documentation files (the "Software"), to
+ deal in the Software without restriction, including without limitation the
+ rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+ sell copies of the Software, and to permit persons to whom the Software is
+ furnished to do so, subject to the following conditions:
+
+ The above copyright notice and this permission notice shall be included in
+ all copies or substantial portions of the Software.
+
+ THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ IN THE SOFTWARE.
+*/
+
+#ifndef __ZMQ_HPP_INCLUDED__
+#define __ZMQ_HPP_INCLUDED__
+
+#include <zmq.h>
+
+#include <algorithm>
+#include <cassert>
+#include <cstring>
+#include <string>
+#include <exception>
+
+// Detect whether the compiler supports C++11 rvalue references.
+#if (defined(__GNUC__) && (__GNUC__ > 4 || \
+ (__GNUC__ == 4 && __GNUC_MINOR__ > 2)) && \
+ defined(__GXX_EXPERIMENTAL_CXX0X__))
+ #define ZMQ_HAS_RVALUE_REFS
+ #define ZMQ_DELETED_FUNCTION = delete
+#elif defined(__clang__)
+ #if __has_feature(cxx_rvalue_references)
+ #define ZMQ_HAS_RVALUE_REFS
+ #endif
+
+ #if __has_feature(cxx_deleted_functions)
+ #define ZMQ_DELETED_FUNCTION = delete
+ #else
+ #define ZMQ_DELETED_FUNCTION
+ #endif
+#elif defined(_MSC_VER) && (_MSC_VER >= 1600)
+ #define ZMQ_HAS_RVALUE_REFS
+ #define ZMQ_DELETED_FUNCTION
+#else
+ #define ZMQ_DELETED_FUNCTION
+#endif
+
+#if ZMQ_VERSION >= ZMQ_MAKE_VERSION(3, 3, 0)
+#define ZMQ_NEW_MONITOR_EVENT_LAYOUT
+#endif
+
+// In order to prevent unused variable warnings when building in non-debug
+// mode use this macro to make assertions.
+#ifndef NDEBUG
+# define ZMQ_ASSERT(expression) assert(expression)
+#else
+# define ZMQ_ASSERT(expression) (void)(expression)
+#endif
+
+namespace zmq
+{
+
+ typedef zmq_free_fn free_fn;
+ typedef zmq_pollitem_t pollitem_t;
+
+ class error_t : public std::exception
+ {
+ public:
+
+ error_t () : errnum (zmq_errno ()) {}
+
+ virtual const char *what () const throw ()
+ {
+ return zmq_strerror (errnum);
+ }
+
+ int num () const
+ {
+ return errnum;
+ }
+
+ private:
+
+ int errnum;
+ };
+
+ inline int poll (zmq_pollitem_t *items_, int nitems_, long timeout_ = -1)
+ {
+ int rc = zmq_poll (items_, nitems_, timeout_);
+ if (rc < 0)
+ throw error_t ();
+ return rc;
+ }
+
+ inline void proxy (void *frontend, void *backend, void *capture)
+ {
+ int rc = zmq_proxy (frontend, backend, capture);
+ if (rc != 0)
+ throw error_t ();
+ }
+
+ inline void version (int *major_, int *minor_, int *patch_)
+ {
+ zmq_version (major_, minor_, patch_);
+ }
+
+ class message_t
+ {
+ friend class socket_t;
+
+ public:
+
+ inline message_t ()
+ {
+ int rc = zmq_msg_init (&msg);
+ if (rc != 0)
+ throw error_t ();
+ }
+
+ inline explicit message_t (size_t size_)
+ {
+ int rc = zmq_msg_init_size (&msg, size_);
+ if (rc != 0)
+ throw error_t ();
+ }
+
+ inline message_t (void *data_, size_t size_, free_fn *ffn_,
+ void *hint_ = NULL)
+ {
+ int rc = zmq_msg_init_data (&msg, data_, size_, ffn_, hint_);
+ if (rc != 0)
+ throw error_t ();
+ }
+
+#ifdef ZMQ_HAS_RVALUE_REFS
+ inline message_t (message_t &&rhs) : msg (rhs.msg)
+ {
+ int rc = zmq_msg_init (&rhs.msg);
+ if (rc != 0)
+ throw error_t ();
+ }
+
+ inline message_t &operator = (message_t &&rhs)
+ {
+ std::swap (msg, rhs.msg);
+ return *this;
+ }
+#endif
+
+ inline ~message_t ()
+ {
+ int rc = zmq_msg_close (&msg);
+ ZMQ_ASSERT (rc == 0);
+ }
+
+ inline void rebuild ()
+ {
+ int rc = zmq_msg_close (&msg);
+ if (rc != 0)
+ throw error_t ();
+ rc = zmq_msg_init (&msg);
+ if (rc != 0)
+ throw error_t ();
+ }
+
+ inline void rebuild (size_t size_)
+ {
+ int rc = zmq_msg_close (&msg);
+ if (rc != 0)
+ throw error_t ();
+ rc = zmq_msg_init_size (&msg, size_);
+ if (rc != 0)
+ throw error_t ();
+ }
+
+ inline void rebuild (void *data_, size_t size_, free_fn *ffn_,
+ void *hint_ = NULL)
+ {
+ int rc = zmq_msg_close (&msg);
+ if (rc != 0)
+ throw error_t ();
+ rc = zmq_msg_init_data (&msg, data_, size_, ffn_, hint_);
+ if (rc != 0)
+ throw error_t ();
+ }
+
+ inline void move (message_t *msg_)
+ {
+ int rc = zmq_msg_move (&msg, &(msg_->msg));
+ if (rc != 0)
+ throw error_t ();
+ }
+
+ inline void copy (message_t *msg_)
+ {
+ int rc = zmq_msg_copy (&msg, &(msg_->msg));
+ if (rc != 0)
+ throw error_t ();
+ }
+
+ inline bool more ()
+ {
+ int rc = zmq_msg_more (&msg);
+ return rc != 0;
+ }
+
+ inline void *data ()
+ {
+ return zmq_msg_data (&msg);
+ }
+
+ inline const void* data () const
+ {
+ return zmq_msg_data (const_cast<zmq_msg_t*>(&msg));
+ }
+
+ inline size_t size () const
+ {
+ return zmq_msg_size (const_cast<zmq_msg_t*>(&msg));
+ }
+
+ private:
+
+ // The underlying message
+ zmq_msg_t msg;
+
+ // Disable implicit message copying, so that users won't use shared
+ // messages (less efficient) without being aware of the fact.
+ message_t (const message_t&);
+ void operator = (const message_t&);
+ };
+
+ class context_t
+ {
+ friend class socket_t;
+
+ public:
+ inline context_t ()
+ {
+ ptr = zmq_ctx_new ();
+ if (ptr == NULL)
+ throw error_t ();
+ }
+
+
+ inline explicit context_t (int io_threads_)
+ {
+ ptr = zmq_ctx_new ();
+ if (ptr == NULL)
+ throw error_t ();
+
+ int rc = zmq_ctx_set (ptr, ZMQ_IO_THREADS, io_threads_);
+ ZMQ_ASSERT (rc == 0);
+ }
+
+#ifdef ZMQ_HAS_RVALUE_REFS
+ inline context_t (context_t &&rhs) : ptr (rhs.ptr)
+ {
+ rhs.ptr = NULL;
+ }
+ inline context_t &operator = (context_t &&rhs)
+ {
+ std::swap (ptr, rhs.ptr);
+ return *this;
+ }
+#endif
+
+ inline ~context_t ()
+ {
+ close();
+ }
+
+ inline void close()
+ {
+ if (ptr == NULL)
+ return;
+ int rc = zmq_ctx_destroy (ptr);
+ ZMQ_ASSERT (rc == 0);
+ ptr = NULL;
+ }
+
+ // Be careful with this, it's probably only useful for
+ // using the C api together with an existing C++ api.
+ // Normally you should never need to use this.
+ inline operator void* ()
+ {
+ return ptr;
+ }
+
+ private:
+
+ void *ptr;
+
+ context_t (const context_t&);
+ void operator = (const context_t&);
+ };
+
+ class socket_t
+ {
+ friend class monitor_t;
+ public:
+
+ inline socket_t (context_t &context_, int type_)
+ {
+ ctxptr = context_.ptr;
+ ptr = zmq_socket (context_.ptr, type_);
+ if (ptr == NULL)
+ throw error_t ();
+ }
+
+#ifdef ZMQ_HAS_RVALUE_REFS
+ inline socket_t(socket_t&& rhs) : ptr(rhs.ptr)
+ {
+ rhs.ptr = NULL;
+ }
+ inline socket_t& operator=(socket_t&& rhs)
+ {
+ std::swap(ptr, rhs.ptr);
+ return *this;
+ }
+#endif
+
+ inline ~socket_t ()
+ {
+ close();
+ }
+
+ inline operator void* ()
+ {
+ return ptr;
+ }
+
+ inline void close()
+ {
+ if(ptr == NULL)
+ // already closed
+ return ;
+ int rc = zmq_close (ptr);
+ ZMQ_ASSERT (rc == 0);
+ ptr = 0 ;
+ }
+
+ inline void setsockopt (int option_, const void *optval_,
+ size_t optvallen_)
+ {
+ int rc = zmq_setsockopt (ptr, option_, optval_, optvallen_);
+ if (rc != 0)
+ throw error_t ();
+ }
+
+ inline void getsockopt (int option_, void *optval_,
+ size_t *optvallen_)
+ {
+ int rc = zmq_getsockopt (ptr, option_, optval_, optvallen_);
+ if (rc != 0)
+ throw error_t ();
+ }
+
+ inline void bind (const char *addr_)
+ {
+ int rc = zmq_bind (ptr, addr_);
+ if (rc != 0)
+ throw error_t ();
+ }
+
+ inline void unbind (const char *addr_)
+ {
+ int rc = zmq_unbind (ptr, addr_);
+ if (rc != 0)
+ throw error_t ();
+ }
+
+ inline void connect (const char *addr_)
+ {
+ int rc = zmq_connect (ptr, addr_);
+ if (rc != 0)
+ throw error_t ();
+ }
+
+ inline void disconnect (const char *addr_)
+ {
+ int rc = zmq_disconnect (ptr, addr_);
+ 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);
+ zmq_event_t* event = static_cast<zmq_event_t*>(zmq_msg_data (&eventMsg));
+
+#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
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