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-rw-r--r--src/context.cpp153
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diff --git a/src/context.cpp b/src/context.cpp
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-/*
- Copyright (c) 2007-2009 FastMQ Inc.
-
- This file is part of 0MQ.
-
- 0MQ is free software; you can redistribute it and/or modify it under
- the terms of the Lesser GNU General Public License as published by
- the Free Software Foundation; either version 3 of the License, or
- (at your option) any later version.
-
- 0MQ 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
- Lesser GNU General Public License for more details.
-
- You should have received a copy of the Lesser GNU General Public License
- along with this program. If not, see <http://www.gnu.org/licenses/>.
-*/
-
-#include "../include/zmq.h"
-
-#include "context.hpp"
-#include "i_api.hpp"
-#include "app_thread.hpp"
-#include "io_thread.hpp"
-#include "platform.hpp"
-#include "err.hpp"
-#include "pipe.hpp"
-
-#if defined ZMQ_HAVE_WINDOWS
-#include "windows.h"
-#endif
-
-zmq::context_t::context_t (int app_threads_, int io_threads_)
-{
-#ifdef ZMQ_HAVE_WINDOWS
- // Intialise Windows sockets. Note that WSAStartup can be called multiple
- // times given that WSACleanup will be called for each WSAStartup.
- 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 application thread proxies.
- for (int i = 0; i != app_threads_; i++) {
- app_thread_t *app_thread = new app_thread_t (this, i);
- zmq_assert (app_thread);
- app_threads.push_back (app_thread);
- signalers.push_back (app_thread->get_signaler ());
- }
-
- // Create I/O thread objects.
- for (int i = 0; i != io_threads_; i++) {
- io_thread_t *io_thread = new io_thread_t (this, i + app_threads_);
- zmq_assert (io_thread);
- io_threads.push_back (io_thread);
- signalers.push_back (io_thread->get_signaler ());
- }
-
- // Create command pipe matrix.
- command_pipes = new command_pipe_t [signalers.size () * signalers.size ()];
- zmq_assert (command_pipes);
-
- // Launch I/O threads.
- for (int i = 0; i != io_threads_; i++)
- io_threads [i]->start ();
-}
-
-zmq::context_t::~context_t ()
-{
- // Close all application theads, sockets, io_objects etc.
- for (app_threads_t::size_type i = 0; i != app_threads.size (); i++)
- delete app_threads [i];
-
- // Ask I/O threads to terminate. If stop signal wasn't sent to I/O
- // thread subsequent invocation of destructor would hang-up.
- for (io_threads_t::size_type i = 0; i != io_threads.size (); i++)
- io_threads [i]->stop ();
-
- // Wait till I/O threads actually terminate.
- for (io_threads_t::size_type i = 0; i != io_threads.size (); i++)
- delete io_threads [i];
-
- delete [] command_pipes;
-
-#ifdef ZMQ_HAVE_WINDOWS
- // On Windows, uninitialise socket layer.
- int rc = WSACleanup ();
- wsa_assert (rc != SOCKET_ERROR);
-#endif
-}
-
-int zmq::context_t::thread_slot_count ()
-{
- return signalers.size ();
-}
-
-zmq::i_api *zmq::context_t::create_socket (int type_)
-{
- threads_sync.lock ();
- app_thread_t *thread = choose_app_thread ();
- if (!thread) {
- threads_sync.unlock ();
- return NULL;
- }
-
- zmq_assert (false);
- i_api *s = NULL;
- //i_api *s = thread->create_socket (type_);
-
- threads_sync.unlock ();
- return s;
-}
-
-zmq::app_thread_t *zmq::context_t::choose_app_thread ()
-{
- // Check whether thread ID is already assigned. If so, return it.
- for (app_threads_t::size_type i = 0; i != app_threads.size (); i++)
- if (app_threads [i]->is_current ())
- return app_threads [i];
-
- // Check whether there's an unused thread slot in the cotext.
- for (app_threads_t::size_type i = 0; i != app_threads.size (); i++)
- if (app_threads [i]->make_current ())
- return app_threads [i];
-
- // Thread limit was exceeded.
- errno = EMFILE;
- return NULL;
-}
-
-zmq::io_thread_t *zmq::context_t::choose_io_thread (uint64_t taskset_)
-{
- zmq_assert (io_threads.size () > 0);
-
- // Find the I/O thread with minimum load.
- int min_load = io_threads [0]->get_load ();
- io_threads_t::size_type result = 0;
- for (io_threads_t::size_type i = 1; i != io_threads.size (); i++) {
- if (!taskset_ || (taskset_ & (uint64_t (1) << i))) {
- int load = io_threads [i]->get_load ();
- if (load < min_load) {
- min_load = load;
- result = i;
- }
- }
- }
-
- return io_threads [result];
-}