diff options
Diffstat (limited to 'external_libs/python/pyzmq-14.7.0/bundled/zeromq/src/zmq.cpp')
| -rw-r--r-- | external_libs/python/pyzmq-14.7.0/bundled/zeromq/src/zmq.cpp | 1095 |
1 files changed, 0 insertions, 1095 deletions
diff --git a/external_libs/python/pyzmq-14.7.0/bundled/zeromq/src/zmq.cpp b/external_libs/python/pyzmq-14.7.0/bundled/zeromq/src/zmq.cpp deleted file mode 100644 index f0f9a099..00000000 --- a/external_libs/python/pyzmq-14.7.0/bundled/zeromq/src/zmq.cpp +++ /dev/null @@ -1,1095 +0,0 @@ -/* - Copyright (c) 2007-2015 Contributors as noted in the AUTHORS file - - This file is part of libzmq, the ZeroMQ core engine in C++. - - libzmq is free software; you can redistribute it and/or modify it under - the terms of the GNU Lesser General Public License (LGPL) as published - by the Free Software Foundation; either version 3 of the License, or - (at your option) any later version. - - As a special exception, the Contributors give you permission to link - this library with independent modules to produce an executable, - regardless of the license terms of these independent modules, and to - copy and distribute the resulting executable under terms of your choice, - provided that you also meet, for each linked independent module, the - terms and conditions of the license of that module. An independent - module is a module which is not derived from or based on this library. - If you modify this library, you must extend this exception to your - version of the library. - - libzmq 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/>. -*/ -#define ZMQ_TYPE_UNSAFE - -#include "poller.hpp" - -// On AIX platform, poll.h has to be included first to get consistent -// definition of pollfd structure (AIX uses 'reqevents' and 'retnevents' -// instead of 'events' and 'revents' and defines macros to map from POSIX-y -// names to AIX-specific names). -#if defined ZMQ_POLL_BASED_ON_POLL -#include <poll.h> -#endif - -// zmq.h must be included *after* poll.h for AIX to build properly -#include "../include/zmq.h" - -#if defined ZMQ_HAVE_WINDOWS -#include "windows.hpp" -#else -#include <unistd.h> -#endif - - -// XSI vector I/O -#if defined ZMQ_HAVE_UIO -#include <sys/uio.h> -#else -struct iovec { - void *iov_base; - size_t iov_len; -}; -#endif - - -#include <string.h> -#include <stdlib.h> -#include <new> - -#include "proxy.hpp" -#include "socket_base.hpp" -#include "stdint.hpp" -#include "config.hpp" -#include "likely.hpp" -#include "clock.hpp" -#include "ctx.hpp" -#include "err.hpp" -#include "msg.hpp" -#include "fd.hpp" -#include "metadata.hpp" - -#if !defined ZMQ_HAVE_WINDOWS -#include <unistd.h> -#endif - -#if defined ZMQ_HAVE_OPENPGM -#define __PGM_WININT_H__ -#include <pgm/pgm.h> -#endif - -// Compile time check whether msg_t fits into zmq_msg_t. -typedef char check_msg_t_size - [sizeof (zmq::msg_t) == sizeof (zmq_msg_t) ? 1 : -1]; - - -void zmq_version (int *major_, int *minor_, int *patch_) -{ - *major_ = ZMQ_VERSION_MAJOR; - *minor_ = ZMQ_VERSION_MINOR; - *patch_ = ZMQ_VERSION_PATCH; -} - - -const char *zmq_strerror (int errnum_) -{ - return zmq::errno_to_string (errnum_); -} - -int zmq_errno (void) -{ - return errno; -} - - -// New context API - -void *zmq_ctx_new (void) -{ -#if defined ZMQ_HAVE_OPENPGM - - // Init PGM transport. Ensure threading and timer are enabled. Find PGM - // protocol ID. Note that if you want to use gettimeofday and sleep for - // openPGM timing, set environment variables PGM_TIMER to "GTOD" and - // PGM_SLEEP to "USLEEP". - pgm_error_t *pgm_error = NULL; - const bool ok = pgm_init (&pgm_error); - if (ok != TRUE) { - - // Invalid parameters don't set pgm_error_t - zmq_assert (pgm_error != NULL); - if (pgm_error->domain == PGM_ERROR_DOMAIN_TIME && ( - pgm_error->code == PGM_ERROR_FAILED)) { - - // Failed to access RTC or HPET device. - pgm_error_free (pgm_error); - errno = EINVAL; - return NULL; - } - - // PGM_ERROR_DOMAIN_ENGINE: WSAStartup errors or missing WSARecvMsg. - zmq_assert (false); - } -#endif - -#ifdef ZMQ_HAVE_WINDOWS - // Intialise Windows sockets. Note that WSAStartup can be called multiple - // times given that WSACleanup will be called for each WSAStartup. - // We do this before the ctx constructor since its embedded mailbox_t - // object needs Winsock to be up and running. - WORD version_requested = MAKEWORD (2, 2); - WSADATA wsa_data; - int rc = WSAStartup (version_requested, &wsa_data); - zmq_assert (rc == 0); - zmq_assert (LOBYTE (wsa_data.wVersion) == 2 && - HIBYTE (wsa_data.wVersion) == 2); -#endif - - // Create 0MQ context. - zmq::ctx_t *ctx = new (std::nothrow) zmq::ctx_t; - alloc_assert (ctx); - return ctx; -} - -int zmq_ctx_term (void *ctx_) -{ - if (!ctx_ || !((zmq::ctx_t*) ctx_)->check_tag ()) { - errno = EFAULT; - return -1; - } - - int rc = ((zmq::ctx_t*) ctx_)->terminate (); - int en = errno; - - // Shut down only if termination was not interrupted by a signal. - if (!rc || en != EINTR) { -#ifdef ZMQ_HAVE_WINDOWS - // On Windows, uninitialise socket layer. - rc = WSACleanup (); - wsa_assert (rc != SOCKET_ERROR); -#endif - -#if defined ZMQ_HAVE_OPENPGM - // Shut down the OpenPGM library. - if (pgm_shutdown () != TRUE) - zmq_assert (false); -#endif - } - - errno = en; - return rc; -} - -int zmq_ctx_shutdown (void *ctx_) -{ - if (!ctx_ || !((zmq::ctx_t*) ctx_)->check_tag ()) { - errno = EFAULT; - return -1; - } - - return ((zmq::ctx_t*) ctx_)->shutdown (); -} - -int zmq_ctx_set (void *ctx_, int option_, int optval_) -{ - if (!ctx_ || !((zmq::ctx_t*) ctx_)->check_tag ()) { - errno = EFAULT; - return -1; - } - return ((zmq::ctx_t*) ctx_)->set (option_, optval_); -} - -int zmq_ctx_get (void *ctx_, int option_) -{ - if (!ctx_ || !((zmq::ctx_t*) ctx_)->check_tag ()) { - errno = EFAULT; - return -1; - } - return ((zmq::ctx_t*) ctx_)->get (option_); -} - -// Stable/legacy context API - -void *zmq_init (int io_threads_) -{ - if (io_threads_ >= 0) { - void *ctx = zmq_ctx_new (); - zmq_ctx_set (ctx, ZMQ_IO_THREADS, io_threads_); - return ctx; - } - errno = EINVAL; - return NULL; -} - -int zmq_term (void *ctx_) -{ - return zmq_ctx_term (ctx_); -} - -int zmq_ctx_destroy (void *ctx_) -{ - return zmq_ctx_term (ctx_); -} - - -// Sockets - -void *zmq_socket (void *ctx_, int type_) -{ - if (!ctx_ || !((zmq::ctx_t*) ctx_)->check_tag ()) { - errno = EFAULT; - return NULL; - } - zmq::ctx_t *ctx = (zmq::ctx_t*) ctx_; - zmq::socket_base_t *s = ctx->create_socket (type_); - return (void *) s; -} - -int zmq_close (void *s_) -{ - if (!s_ || !((zmq::socket_base_t*) s_)->check_tag ()) { - errno = ENOTSOCK; - return -1; - } - ((zmq::socket_base_t*) s_)->close (); - return 0; -} - -int zmq_setsockopt (void *s_, int option_, const void *optval_, - size_t optvallen_) -{ - if (!s_ || !((zmq::socket_base_t*) s_)->check_tag ()) { - errno = ENOTSOCK; - return -1; - } - zmq::socket_base_t *s = (zmq::socket_base_t *) s_; - int result = s->setsockopt (option_, optval_, optvallen_); - return result; -} - -int zmq_getsockopt (void *s_, int option_, void *optval_, size_t *optvallen_) -{ - if (!s_ || !((zmq::socket_base_t*) s_)->check_tag ()) { - errno = ENOTSOCK; - return -1; - } - zmq::socket_base_t *s = (zmq::socket_base_t *) s_; - int result = s->getsockopt (option_, optval_, optvallen_); - return result; -} - -int zmq_socket_monitor (void *s_, const char *addr_, int events_) -{ - if (!s_ || !((zmq::socket_base_t*) s_)->check_tag ()) { - errno = ENOTSOCK; - return -1; - } - zmq::socket_base_t *s = (zmq::socket_base_t *) s_; - int result = s->monitor (addr_, events_); - return result; -} - -int zmq_bind (void *s_, const char *addr_) -{ - if (!s_ || !((zmq::socket_base_t*) s_)->check_tag ()) { - errno = ENOTSOCK; - return -1; - } - zmq::socket_base_t *s = (zmq::socket_base_t *) s_; - int result = s->bind (addr_); - return result; -} - -int zmq_connect (void *s_, const char *addr_) -{ - if (!s_ || !((zmq::socket_base_t*) s_)->check_tag ()) { - errno = ENOTSOCK; - return -1; - } - zmq::socket_base_t *s = (zmq::socket_base_t *) s_; - int result = s->connect (addr_); - return result; -} - -int zmq_unbind (void *s_, const char *addr_) -{ - if (!s_ || !((zmq::socket_base_t*) s_)->check_tag ()) { - errno = ENOTSOCK; - return -1; - } - zmq::socket_base_t *s = (zmq::socket_base_t *) s_; - return s->term_endpoint (addr_); -} - -int zmq_disconnect (void *s_, const char *addr_) -{ - if (!s_ || !((zmq::socket_base_t*) s_)->check_tag ()) { - errno = ENOTSOCK; - return -1; - } - zmq::socket_base_t *s = (zmq::socket_base_t *) s_; - return s->term_endpoint (addr_); -} - -// Sending functions. - -static int -s_sendmsg (zmq::socket_base_t *s_, zmq_msg_t *msg_, int flags_) -{ - int sz = (int) zmq_msg_size (msg_); - int rc = s_->send ((zmq::msg_t*) msg_, flags_); - if (unlikely (rc < 0)) - return -1; - return sz; -} - -/* To be deprecated once zmq_msg_send() is stable */ -int zmq_sendmsg (void *s_, zmq_msg_t *msg_, int flags_) -{ - return zmq_msg_send (msg_, s_, flags_); -} - -int zmq_send (void *s_, const void *buf_, size_t len_, int flags_) -{ - if (!s_ || !((zmq::socket_base_t*) s_)->check_tag ()) { - errno = ENOTSOCK; - return -1; - } - zmq_msg_t msg; - int rc = zmq_msg_init_size (&msg, len_); - if (rc != 0) - return -1; - memcpy (zmq_msg_data (&msg), buf_, len_); - - zmq::socket_base_t *s = (zmq::socket_base_t *) s_; - rc = s_sendmsg (s, &msg, flags_); - if (unlikely (rc < 0)) { - int err = errno; - int rc2 = zmq_msg_close (&msg); - errno_assert (rc2 == 0); - errno = err; - return -1; - } - - // Note the optimisation here. We don't close the msg object as it is - // empty anyway. This may change when implementation of zmq_msg_t changes. - return rc; -} - -int zmq_send_const (void *s_, const void *buf_, size_t len_, int flags_) -{ - if (!s_ || !((zmq::socket_base_t*) s_)->check_tag ()) { - errno = ENOTSOCK; - return -1; - } - zmq_msg_t msg; - int rc = zmq_msg_init_data (&msg, (void*)buf_, len_, NULL, NULL); - if (rc != 0) - return -1; - - zmq::socket_base_t *s = (zmq::socket_base_t *) s_; - rc = s_sendmsg (s, &msg, flags_); - if (unlikely (rc < 0)) { - int err = errno; - int rc2 = zmq_msg_close (&msg); - errno_assert (rc2 == 0); - errno = err; - return -1; - } - - // Note the optimisation here. We don't close the msg object as it is - // empty anyway. This may change when implementation of zmq_msg_t changes. - return rc; -} - - -// Send multiple messages. -// TODO: this function has no man page -// -// If flag bit ZMQ_SNDMORE is set the vector is treated as -// a single multi-part message, i.e. the last message has -// ZMQ_SNDMORE bit switched off. -// -int zmq_sendiov (void *s_, iovec *a_, size_t count_, int flags_) -{ - if (!s_ || !((zmq::socket_base_t*) s_)->check_tag ()) { - errno = ENOTSOCK; - return -1; - } - int rc = 0; - zmq_msg_t msg; - zmq::socket_base_t *s = (zmq::socket_base_t *) s_; - - for (size_t i = 0; i < count_; ++i) { - rc = zmq_msg_init_size (&msg, a_[i].iov_len); - if (rc != 0) { - rc = -1; - break; - } - memcpy (zmq_msg_data (&msg), a_[i].iov_base, a_[i].iov_len); - if (i == count_ - 1) - flags_ = flags_ & ~ZMQ_SNDMORE; - rc = s_sendmsg (s, &msg, flags_); - if (unlikely (rc < 0)) { - int err = errno; - int rc2 = zmq_msg_close (&msg); - errno_assert (rc2 == 0); - errno = err; - rc = -1; - break; - } - } - return rc; -} - -// Receiving functions. - -static int -s_recvmsg (zmq::socket_base_t *s_, zmq_msg_t *msg_, int flags_) -{ - int rc = s_->recv ((zmq::msg_t*) msg_, flags_); - if (unlikely (rc < 0)) - return -1; - return (int) zmq_msg_size (msg_); -} - -/* To be deprecated once zmq_msg_recv() is stable */ -int zmq_recvmsg (void *s_, zmq_msg_t *msg_, int flags_) -{ - return zmq_msg_recv (msg_, s_, flags_); -} - - -int zmq_recv (void *s_, void *buf_, size_t len_, int flags_) -{ - if (!s_ || !((zmq::socket_base_t*) s_)->check_tag ()) { - errno = ENOTSOCK; - return -1; - } - zmq_msg_t msg; - int rc = zmq_msg_init (&msg); - errno_assert (rc == 0); - - zmq::socket_base_t *s = (zmq::socket_base_t *) s_; - int nbytes = s_recvmsg (s, &msg, flags_); - if (unlikely (nbytes < 0)) { - int err = errno; - rc = zmq_msg_close (&msg); - errno_assert (rc == 0); - errno = err; - return -1; - } - - // At the moment an oversized message is silently truncated. - // TODO: Build in a notification mechanism to report the overflows. - size_t to_copy = size_t (nbytes) < len_ ? size_t (nbytes) : len_; - memcpy (buf_, zmq_msg_data (&msg), to_copy); - - rc = zmq_msg_close (&msg); - errno_assert (rc == 0); - - return nbytes; -} - -// Receive a multi-part message -// -// Receives up to *count_ parts of a multi-part message. -// Sets *count_ to the actual number of parts read. -// ZMQ_RCVMORE is set to indicate if a complete multi-part message was read. -// Returns number of message parts read, or -1 on error. -// -// Note: even if -1 is returned, some parts of the message -// may have been read. Therefore the client must consult -// *count_ to retrieve message parts successfully read, -// even if -1 is returned. -// -// The iov_base* buffers of each iovec *a_ filled in by this -// function may be freed using free(). -// TODO: this function has no man page -// -int zmq_recviov (void *s_, iovec *a_, size_t *count_, int flags_) -{ - if (!s_ || !((zmq::socket_base_t*) s_)->check_tag ()) { - errno = ENOTSOCK; - return -1; - } - zmq::socket_base_t *s = (zmq::socket_base_t *) s_; - - size_t count = *count_; - int nread = 0; - bool recvmore = true; - - *count_ = 0; - - for (size_t i = 0; recvmore && i < count; ++i) { - - zmq_msg_t msg; - int rc = zmq_msg_init (&msg); - errno_assert (rc == 0); - - int nbytes = s_recvmsg (s, &msg, flags_); - if (unlikely (nbytes < 0)) { - int err = errno; - rc = zmq_msg_close (&msg); - errno_assert (rc == 0); - errno = err; - nread = -1; - break; - } - - a_[i].iov_len = zmq_msg_size (&msg); - a_[i].iov_base = static_cast<char *> (malloc(a_[i].iov_len)); - if (unlikely (!a_[i].iov_base)) { - errno = ENOMEM; - return -1; - } - memcpy(a_[i].iov_base,static_cast<char *> (zmq_msg_data (&msg)), - a_[i].iov_len); - // Assume zmq_socket ZMQ_RVCMORE is properly set. - recvmore = ((zmq::msg_t*) (void *) &msg)->flags () & zmq::msg_t::more; - rc = zmq_msg_close(&msg); - errno_assert (rc == 0); - ++*count_; - ++nread; - } - return nread; -} - -// Message manipulators. - -int zmq_msg_init (zmq_msg_t *msg_) -{ - return ((zmq::msg_t*) msg_)->init (); -} - -int zmq_msg_init_size (zmq_msg_t *msg_, size_t size_) -{ - return ((zmq::msg_t*) msg_)->init_size (size_); -} - -int zmq_msg_init_data (zmq_msg_t *msg_, void *data_, size_t size_, - zmq_free_fn *ffn_, void *hint_) -{ - return ((zmq::msg_t*) msg_)->init_data (data_, size_, ffn_, hint_); -} - -int zmq_msg_send (zmq_msg_t *msg_, void *s_, int flags_) -{ - if (!s_ || !((zmq::socket_base_t*) s_)->check_tag ()) { - errno = ENOTSOCK; - return -1; - } - zmq::socket_base_t *s = (zmq::socket_base_t *) s_; - int result = s_sendmsg (s, msg_, flags_); - return result; -} - -int zmq_msg_recv (zmq_msg_t *msg_, void *s_, int flags_) -{ - if (!s_ || !((zmq::socket_base_t*) s_)->check_tag ()) { - errno = ENOTSOCK; - return -1; - } - zmq::socket_base_t *s = (zmq::socket_base_t *) s_; - int result = s_recvmsg (s, msg_, flags_); - return result; -} - -int zmq_msg_close (zmq_msg_t *msg_) -{ - return ((zmq::msg_t*) msg_)->close (); -} - -int zmq_msg_move (zmq_msg_t *dest_, zmq_msg_t *src_) -{ - return ((zmq::msg_t*) dest_)->move (*(zmq::msg_t*) src_); -} - -int zmq_msg_copy (zmq_msg_t *dest_, zmq_msg_t *src_) -{ - return ((zmq::msg_t*) dest_)->copy (*(zmq::msg_t*) src_); -} - -void *zmq_msg_data (zmq_msg_t *msg_) -{ - return ((zmq::msg_t*) msg_)->data (); -} - -size_t zmq_msg_size (zmq_msg_t *msg_) -{ - return ((zmq::msg_t*) msg_)->size (); -} - -int zmq_msg_more (zmq_msg_t *msg_) -{ - return zmq_msg_get (msg_, ZMQ_MORE); -} - -int zmq_msg_get (zmq_msg_t *msg_, int property_) -{ - switch (property_) { - case ZMQ_MORE: - return (((zmq::msg_t*) msg_)->flags () & zmq::msg_t::more)? 1: 0; - case ZMQ_SRCFD: - // warning: int64_t to int - return ((zmq::msg_t*) msg_)->fd (); - case ZMQ_SHARED: - return (((zmq::msg_t*) msg_)->is_cmsg ()) || - (((zmq::msg_t*) msg_)->flags () & zmq::msg_t::shared)? 1: 0; - default: - errno = EINVAL; - return -1; - } -} - -int zmq_msg_set (zmq_msg_t *, int, int) -{ - // No properties supported at present - errno = EINVAL; - return -1; -} - - -// Get message metadata string - -const char *zmq_msg_gets (zmq_msg_t *msg_, const char *property_) -{ - zmq::metadata_t *metadata = ((zmq::msg_t*) msg_)->metadata (); - const char *value = NULL; - if (metadata) - value = metadata->get (std::string (property_)); - if (value) - return value; - else { - errno = EINVAL; - return NULL; - } -} - -// Polling. - -int zmq_poll (zmq_pollitem_t *items_, int nitems_, long timeout_) -{ -#if defined ZMQ_POLL_BASED_ON_POLL - if (unlikely (nitems_ < 0)) { - errno = EINVAL; - return -1; - } - if (unlikely (nitems_ == 0)) { - if (timeout_ == 0) - return 0; -#if defined ZMQ_HAVE_WINDOWS - Sleep (timeout_ > 0 ? timeout_ : INFINITE); - return 0; -#elif defined ZMQ_HAVE_ANDROID - usleep (timeout_ * 1000); - return 0; -#else - return usleep (timeout_ * 1000); -#endif - } - - if (!items_) { - errno = EFAULT; - return -1; - } - - zmq::clock_t clock; - uint64_t now = 0; - uint64_t end = 0; - pollfd spollfds[ZMQ_POLLITEMS_DFLT]; - pollfd *pollfds = spollfds; - - if (nitems_ > ZMQ_POLLITEMS_DFLT) { - pollfds = (pollfd*) malloc (nitems_ * sizeof (pollfd)); - alloc_assert (pollfds); - } - - // Build pollset for poll () system call. - for (int i = 0; i != nitems_; i++) { - - // If the poll item is a 0MQ socket, we poll on the file descriptor - // retrieved by the ZMQ_FD socket option. - if (items_ [i].socket) { - size_t zmq_fd_size = sizeof (zmq::fd_t); - if (zmq_getsockopt (items_ [i].socket, ZMQ_FD, &pollfds [i].fd, - &zmq_fd_size) == -1) { - if (pollfds != spollfds) - free (pollfds); - return -1; - } - pollfds [i].events = items_ [i].events ? POLLIN : 0; - } - // Else, the poll item is a raw file descriptor. Just convert the - // events to normal POLLIN/POLLOUT for poll (). - else { - pollfds [i].fd = items_ [i].fd; - pollfds [i].events = - (items_ [i].events & ZMQ_POLLIN ? POLLIN : 0) | - (items_ [i].events & ZMQ_POLLOUT ? POLLOUT : 0); - } - } - - bool first_pass = true; - int nevents = 0; - - while (true) { - // Compute the timeout for the subsequent poll. - int timeout; - if (first_pass) - timeout = 0; - else - if (timeout_ < 0) - timeout = -1; - else - timeout = end - now; - - // Wait for events. - while (true) { - int rc = poll (pollfds, nitems_, timeout); - if (rc == -1 && errno == EINTR) { - if (pollfds != spollfds) - free (pollfds); - return -1; - } - errno_assert (rc >= 0); - break; - } - // Check for the events. - for (int i = 0; i != nitems_; i++) { - - items_ [i].revents = 0; - - // The poll item is a 0MQ socket. Retrieve pending events - // using the ZMQ_EVENTS socket option. - if (items_ [i].socket) { - size_t zmq_events_size = sizeof (uint32_t); - uint32_t zmq_events; - if (zmq_getsockopt (items_ [i].socket, ZMQ_EVENTS, &zmq_events, - &zmq_events_size) == -1) { - if (pollfds != spollfds) - free (pollfds); - return -1; - } - if ((items_ [i].events & ZMQ_POLLOUT) && - (zmq_events & ZMQ_POLLOUT)) - items_ [i].revents |= ZMQ_POLLOUT; - if ((items_ [i].events & ZMQ_POLLIN) && - (zmq_events & ZMQ_POLLIN)) - items_ [i].revents |= ZMQ_POLLIN; - } - // Else, the poll item is a raw file descriptor, simply convert - // the events to zmq_pollitem_t-style format. - else { - if (pollfds [i].revents & POLLIN) - items_ [i].revents |= ZMQ_POLLIN; - if (pollfds [i].revents & POLLOUT) - items_ [i].revents |= ZMQ_POLLOUT; - if (pollfds [i].revents & ~(POLLIN | POLLOUT)) - items_ [i].revents |= ZMQ_POLLERR; - } - - if (items_ [i].revents) - nevents++; - } - - // If timout is zero, exit immediately whether there are events or not. - if (timeout_ == 0) - break; - - // If there are events to return, we can exit immediately. - if (nevents) - break; - - // At this point we are meant to wait for events but there are none. - // If timeout is infinite we can just loop until we get some events. - if (timeout_ < 0) { - if (first_pass) - first_pass = false; - continue; - } - - // The timeout is finite and there are no events. In the first pass - // we get a timestamp of when the polling have begun. (We assume that - // first pass have taken negligible time). We also compute the time - // when the polling should time out. - if (first_pass) { - now = clock.now_ms (); - end = now + timeout_; - if (now == end) - break; - first_pass = false; - continue; - } - - // Find out whether timeout have expired. - now = clock.now_ms (); - if (now >= end) - break; - } - - if (pollfds != spollfds) - free (pollfds); - return nevents; - -#elif defined ZMQ_POLL_BASED_ON_SELECT - - if (unlikely (nitems_ < 0)) { - errno = EINVAL; - return -1; - } - if (unlikely (nitems_ == 0)) { - if (timeout_ == 0) - return 0; -#if defined ZMQ_HAVE_WINDOWS - Sleep (timeout_ > 0 ? timeout_ : INFINITE); - return 0; -#else - return usleep (timeout_ * 1000); -#endif - } - zmq::clock_t clock; - uint64_t now = 0; - uint64_t end = 0; - - // Ensure we do not attempt to select () on more than FD_SETSIZE - // file descriptors. - zmq_assert (nitems_ <= FD_SETSIZE); - - fd_set pollset_in; - FD_ZERO (&pollset_in); - fd_set pollset_out; - FD_ZERO (&pollset_out); - fd_set pollset_err; - FD_ZERO (&pollset_err); - - zmq::fd_t maxfd = 0; - - // Build the fd_sets for passing to select (). - for (int i = 0; i != nitems_; i++) { - - // If the poll item is a 0MQ socket we are interested in input on the - // notification file descriptor retrieved by the ZMQ_FD socket option. - if (items_ [i].socket) { - size_t zmq_fd_size = sizeof (zmq::fd_t); - zmq::fd_t notify_fd; - if (zmq_getsockopt (items_ [i].socket, ZMQ_FD, ¬ify_fd, - &zmq_fd_size) == -1) - return -1; - if (items_ [i].events) { - FD_SET (notify_fd, &pollset_in); - if (maxfd < notify_fd) - maxfd = notify_fd; - } - } - // Else, the poll item is a raw file descriptor. Convert the poll item - // events to the appropriate fd_sets. - else { - if (items_ [i].events & ZMQ_POLLIN) - FD_SET (items_ [i].fd, &pollset_in); - if (items_ [i].events & ZMQ_POLLOUT) - FD_SET (items_ [i].fd, &pollset_out); - if (items_ [i].events & ZMQ_POLLERR) - FD_SET (items_ [i].fd, &pollset_err); - if (maxfd < items_ [i].fd) - maxfd = items_ [i].fd; - } - } - - bool first_pass = true; - int nevents = 0; - fd_set inset, outset, errset; - - while (true) { - - // Compute the timeout for the subsequent poll. - timeval timeout; - timeval *ptimeout; - if (first_pass) { - timeout.tv_sec = 0; - timeout.tv_usec = 0; - ptimeout = &timeout; - } - else - if (timeout_ < 0) - ptimeout = NULL; - else { - timeout.tv_sec = (long) ((end - now) / 1000); - timeout.tv_usec = (long) ((end - now) % 1000 * 1000); - ptimeout = &timeout; - } - - // Wait for events. Ignore interrupts if there's infinite timeout. - while (true) { - memcpy (&inset, &pollset_in, sizeof (fd_set)); - memcpy (&outset, &pollset_out, sizeof (fd_set)); - memcpy (&errset, &pollset_err, sizeof (fd_set)); -#if defined ZMQ_HAVE_WINDOWS - int rc = select (0, &inset, &outset, &errset, ptimeout); - if (unlikely (rc == SOCKET_ERROR)) { - errno = zmq::wsa_error_to_errno (WSAGetLastError ()); - wsa_assert (errno == ENOTSOCK); - return -1; - } -#else - int rc = select (maxfd + 1, &inset, &outset, &errset, ptimeout); - if (unlikely (rc == -1)) { - errno_assert (errno == EINTR || errno == EBADF); - return -1; - } -#endif - break; - } - - // Check for the events. - for (int i = 0; i != nitems_; i++) { - - items_ [i].revents = 0; - - // The poll item is a 0MQ socket. Retrieve pending events - // using the ZMQ_EVENTS socket option. - if (items_ [i].socket) { - size_t zmq_events_size = sizeof (uint32_t); - uint32_t zmq_events; - if (zmq_getsockopt (items_ [i].socket, ZMQ_EVENTS, &zmq_events, - &zmq_events_size) == -1) - return -1; - if ((items_ [i].events & ZMQ_POLLOUT) && - (zmq_events & ZMQ_POLLOUT)) - items_ [i].revents |= ZMQ_POLLOUT; - if ((items_ [i].events & ZMQ_POLLIN) && - (zmq_events & ZMQ_POLLIN)) - items_ [i].revents |= ZMQ_POLLIN; - } - // Else, the poll item is a raw file descriptor, simply convert - // the events to zmq_pollitem_t-style format. - else { - if (FD_ISSET (items_ [i].fd, &inset)) - items_ [i].revents |= ZMQ_POLLIN; - if (FD_ISSET (items_ [i].fd, &outset)) - items_ [i].revents |= ZMQ_POLLOUT; - if (FD_ISSET (items_ [i].fd, &errset)) - items_ [i].revents |= ZMQ_POLLERR; - } - - if (items_ [i].revents) - nevents++; - } - - // If timout is zero, exit immediately whether there are events or not. - if (timeout_ == 0) - break; - - // If there are events to return, we can exit immediately. - if (nevents) - break; - - // At this point we are meant to wait for events but there are none. - // If timeout is infinite we can just loop until we get some events. - if (timeout_ < 0) { - if (first_pass) - first_pass = false; - continue; - } - - // The timeout is finite and there are no events. In the first pass - // we get a timestamp of when the polling have begun. (We assume that - // first pass have taken negligible time). We also compute the time - // when the polling should time out. - if (first_pass) { - now = clock.now_ms (); - end = now + timeout_; - if (now == end) - break; - first_pass = false; - continue; - } - - // Find out whether timeout have expired. - now = clock.now_ms (); - if (now >= end) - break; - } - - return nevents; - -#else - // Exotic platforms that support neither poll() nor select(). - errno = ENOTSUP; - return -1; -#endif -} - -// The proxy functionality - -int zmq_proxy (void *frontend_, void *backend_, void *capture_) -{ - if (!frontend_ || !backend_) { - errno = EFAULT; - return -1; - } - return zmq::proxy ( - (zmq::socket_base_t*) frontend_, - (zmq::socket_base_t*) backend_, - (zmq::socket_base_t*) capture_); -} - -int zmq_proxy_steerable (void *frontend_, void *backend_, void *capture_, void *control_) -{ - if (!frontend_ || !backend_) { - errno = EFAULT; - return -1; - } - return zmq::proxy ( - (zmq::socket_base_t*) frontend_, - (zmq::socket_base_t*) backend_, - (zmq::socket_base_t*) capture_, - (zmq::socket_base_t*) control_); -} - -// The deprecated device functionality - -int zmq_device (int /* type */, void *frontend_, void *backend_) -{ - return zmq::proxy ( - (zmq::socket_base_t*) frontend_, - (zmq::socket_base_t*) backend_, NULL); -} - -// Probe library capabilities; for now, reports on transport and security - -int zmq_has (const char *capability) -{ -#if !defined (ZMQ_HAVE_WINDOWS) && !defined (ZMQ_HAVE_OPENVMS) - if (strcmp (capability, "ipc") == 0) - return true; -#endif -#if defined (ZMQ_HAVE_OPENPGM) - if (strcmp (capability, "pgm") == 0) - return true; -#endif -#if defined (ZMQ_HAVE_TIPC) - if (strcmp (capability, "tipc") == 0) - return true; -#endif -#if defined (ZMQ_HAVE_NORM) - if (strcmp (capability, "norm") == 0) - return true; -#endif -#if defined (HAVE_LIBSODIUM) - if (strcmp (capability, "curve") == 0) - return true; -#endif -#if defined (HAVE_LIBGSSAPI_KRB5) - if (strcmp (capability, "gssapi") == 0) - return true; -#endif - // Whatever the application asked for, we don't have - return false; -} |