generic-library/cppzmq
1
0
Fork 0
mirror of https://github.com/zeromq/cppzmq.git synced 2024-12-12 18:40:28 +01:00
Code Issues Projects Releases Wiki Activity
971092e472
cppzmq/zmq.hpp

760 lines
22 KiB
C++
Raw Blame History

/*
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__
#if __cplusplus >= 201103L
#define ZMQ_CPP11
#define ZMQ_NOTHROW noexcept
#define ZMQ_EXPLICIT explicit
#else
#define ZMQ_CPP03
#define ZMQ_NOTHROW
#define ZMQ_EXPLICIT
#endif
#include <zmq.h>
#include <algorithm>
#include <cassert>
#include <cstring>
#include <string>
#include <exception>
#include <vector>
#include <iterator>
#ifdef ZMQ_CPP11
#include <chrono>
#include <tuple>
#endif
// 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
#if ZMQ_VERSION >= ZMQ_MAKE_VERSION(4, 1, 0)
#define ZMQ_HAS_PROXY_STEERABLE
/* Socket event data */
typedef struct {
uint16_t event; // id of the event as bitfield
int32_t value ; // value is either error code, fd or reconnect interval
} zmq_event_t;
#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 const* items_, int nitems_, long timeout_ = -1)
{
int rc = zmq_poll (const_cast<zmq_pollitem_t*>(items_), nitems_, timeout_);
if (rc < 0)
throw error_t ();
return rc;
}
inline int poll(zmq_pollitem_t const* items, size_t nitems)
{
return poll(items, nitems, -1 );
}
#ifdef ZMQ_CPP11
inline int poll(zmq_pollitem_t const* items, size_t nitems, std::chrono::milliseconds timeout)
{
return poll(items, nitems, timeout.count() );
}
inline int poll(std::vector<zmq_pollitem_t> const& items, std::chrono::milliseconds timeout)
{
return poll(items.data(), items.size(), timeout.count() );
}
#endif
inline int poll(std::vector<zmq_pollitem_t> const& items, long timeout_ = -1)
{
return poll(items.data(), items.size(), timeout_);
}
inline void proxy (void *frontend, void *backend, void *capture)
{
int rc = zmq_proxy (frontend, backend, capture);
if (rc != 0)
throw error_t ();
}
#ifdef ZMQ_HAS_PROXY_STEERABLE
inline void proxy_steerable (void *frontend, void *backend, void *capture, void *control)
{
int rc = zmq_proxy_steerable (frontend, backend, capture, control);
if (rc != 0)
throw error_t ();
}
#endif
inline void version (int *major_, int *minor_, int *patch_)
{
zmq_version (major_, minor_, patch_);
}
#ifdef ZMQ_CPP11
inline std::tuple<int, int, int> version()
{
std::tuple<int, int, int> v;
zmq_version(&std::get<0>(v), &std::get<1>(v), &std::get<2>(v) );
return v;
}
#endif
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 ();
}
template<typename I> message_t(I first, I last):
msg()
{
typedef typename std::iterator_traits<I>::difference_type size_type;
typedef typename std::iterator_traits<I>::pointer pointer_t;
size_type const size_ = std::distance(first, last);
int const rc = zmq_msg_init_size (&msg, size_);
if (rc != 0)
throw error_t ();
std::copy(first, last, static_cast<pointer_t>(zmq_msg_data (&msg)) );
}
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) ZMQ_NOTHROW
{
std::swap (msg, rhs.msg);
return *this;
}
#endif
inline ~message_t () ZMQ_NOTHROW
{
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 const *msg_)
{
int rc = zmq_msg_move (&msg, const_cast<zmq_msg_t*>(&(msg_->msg)));
if (rc != 0)
throw error_t ();
}
inline void copy (message_t const *msg_)
{
int rc = zmq_msg_copy (&msg, const_cast<zmq_msg_t*>(&(msg_->msg)));
if (rc != 0)
throw error_t ();
}
inline bool more () const ZMQ_NOTHROW
{
int rc = zmq_msg_more (const_cast<zmq_msg_t*>(&msg) );
return rc != 0;
}
inline void *data () ZMQ_NOTHROW
{
return zmq_msg_data (&msg);
}
inline const void* data () const ZMQ_NOTHROW
{
return zmq_msg_data (const_cast<zmq_msg_t*>(&msg));
}
inline size_t size () const ZMQ_NOTHROW
{
return zmq_msg_size (const_cast<zmq_msg_t*>(&msg));
}
template<typename T> T* data() ZMQ_NOTHROW
{
return static_cast<T*>( data() );
}
template<typename T> T const* data() const ZMQ_NOTHROW
{
return static_cast<T const*>( data() );
}
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&) ZMQ_DELETED_FUNCTION;
void operator = (const message_t&) ZMQ_DELETED_FUNCTION;
};
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_, int max_sockets_ = ZMQ_MAX_SOCKETS_DFLT)
{
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);
rc = zmq_ctx_set (ptr, ZMQ_MAX_SOCKETS, max_sockets_);
ZMQ_ASSERT (rc == 0);
}
#ifdef ZMQ_HAS_RVALUE_REFS
inline context_t (context_t &&rhs) ZMQ_NOTHROW : ptr (rhs.ptr)
{
rhs.ptr = NULL;
}
inline context_t &operator = (context_t &&rhs) ZMQ_NOTHROW
{
std::swap (ptr, rhs.ptr);
return *this;
}
#endif
inline ~context_t () ZMQ_NOTHROW
{
int rc = zmq_ctx_destroy (ptr);
ZMQ_ASSERT (rc == 0);
}
inline void close() ZMQ_NOTHROW
{
int rc = zmq_ctx_shutdown (ptr);
ZMQ_ASSERT (rc == 0);
}
// 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 ZMQ_EXPLICIT operator void* () ZMQ_NOTHROW
{
return ptr;
}
inline ZMQ_EXPLICIT operator void const* () const ZMQ_NOTHROW
{
return ptr;
}
private:
void *ptr;
context_t (const context_t&) ZMQ_DELETED_FUNCTION;
void operator = (const context_t&) ZMQ_DELETED_FUNCTION;
};
#ifdef ZMQ_CPP11
enum class socket_type: int
{
req = ZMQ_REQ,
rep = ZMQ_REP,
dealer = ZMQ_DEALER,
router = ZMQ_ROUTER,
pub = ZMQ_PUB,
sub = ZMQ_SUB,
xpub = ZMQ_XPUB,
xsub = ZMQ_XSUB,
push = ZMQ_PUSH,
pull = ZMQ_PULL,
#if ZMQ_VERSION_MAJOR < 4
pair = ZMQ_PAIR
#else
pair = ZMQ_PAIR,
stream = ZMQ_STREAM
#endif
};
#endif
class socket_t
{
friend class monitor_t;
public:
inline socket_t(context_t& context_, int type_)
{
init(context_, type_);
}
#ifdef ZMQ_CPP11
inline socket_t(context_t& context_, socket_type type_)
{
init(context_, static_cast<int>(type_));
}
#endif
#ifdef ZMQ_HAS_RVALUE_REFS
inline socket_t(socket_t&& rhs) ZMQ_NOTHROW : ptr(rhs.ptr)
{
rhs.ptr = NULL;
}
inline socket_t& operator=(socket_t&& rhs) ZMQ_NOTHROW
{
std::swap(ptr, rhs.ptr);
return *this;
}
#endif
inline ~socket_t () ZMQ_NOTHROW
{
close();
}
inline ZMQ_EXPLICIT operator void* () ZMQ_NOTHROW
{
return ptr;
}
inline ZMQ_EXPLICIT operator void const* () const ZMQ_NOTHROW
{
return ptr;
}
inline void close() ZMQ_NOTHROW
{
if(ptr == NULL)
// already closed
return ;
int rc = zmq_close (ptr);
ZMQ_ASSERT (rc == 0);
ptr = 0 ;
}
template<typename T> void setsockopt(int option_, T const& optval)
{
setsockopt(option_, &optval, sizeof(T) );
}
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 ();
}
template<typename T> T getsockopt(int option_)
{
T optval;
size_t optlen = sizeof(T);
getsockopt(option_, &optval, &optlen );
return optval;
}
inline void bind(std::string const& addr)
{
bind(addr.c_str());
}
inline void bind (const char *addr_)
{
int rc = zmq_bind (ptr, addr_);
if (rc != 0)
throw error_t ();
}
inline void unbind(std::string const& addr)
{
unbind(addr.c_str());
}
inline void unbind (const char *addr_)
{
int rc = zmq_unbind (ptr, addr_);
if (rc != 0)
throw error_t ();
}
inline void connect(std::string const& addr)
{
connect(addr.c_str());
}
inline void connect (const char *addr_)
{
int rc = zmq_connect (ptr, addr_);
if (rc != 0)
throw error_t ();
}
inline void disconnect(std::string const& addr)
{
disconnect(addr.c_str());
}
inline void disconnect (const char *addr_)
{
int rc = zmq_disconnect (ptr, addr_);
if (rc != 0)
throw error_t ();
}
inline bool connected() const ZMQ_NOTHROW
{
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 ();
}
template<typename I> bool send(I first, I last, int flags_=0)
{
zmq::message_t msg(first, last);
return send(msg, flags_);
}
#ifdef ZMQ_HAS_RVALUE_REFS
inline bool send (message_t &&msg_, int flags_ = 0)
{
return send(msg_, flags_);
}
#endif
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:
inline void init(context_t& context_, int type_)
{
ctxptr = context_.ptr;
ptr = zmq_socket (context_.ptr, type_ );
if (ptr == NULL)
throw error_t ();
}
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, std::string const& addr, int events = ZMQ_EVENT_ALL)
{
monitor(socket, addr.c_str(), events);
}
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;
memcpy(&msgEvent.event, data, sizeof(uint16_t)); data += sizeof(uint16_t);
memcpy(&msgEvent.value, data, sizeof(int32_t));
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
Reference in New Issue View Git Blame Copy Permalink