initial commit

src/kqueue.cpp

@@ -0,0 +1,214 @@
+/*
+    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 "platform.hpp"
+
+#if defined ZS_HAVE_FREEBSD || defined ZS_HAVE_OPENBSD || defined ZS_HAVE_OSX
+
+#include <sys/time.h>
+#include <sys/types.h>
+#include <sys/event.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <algorithm>
+
+#include "kqueue.hpp"
+#include "err.hpp"
+#include "config.hpp"
+#include "i_poll_events.hpp"
+
+zs::kqueue_t::kqueue_t ()
+{
+    //  Create event queue
+    kqueue_fd = kqueue ();
+    errno_assert (kqueue_fd != -1);
+}
+
+zs::kqueue_t::~kqueue_t ()
+{
+    close (kqueue_fd);
+}
+
+void zs::kqueue_t::kevent_add (fd_t fd_, short filter_, void *udata_)
+{
+    struct kevent ev;
+
+    EV_SET (&ev, fd_, filter_, EV_ADD, 0, 0, udata_);
+    int rc = kevent (kqueue_fd, &ev, 1, NULL, 0, NULL);
+    errno_assert (rc != -1);
+}
+
+void zs::kqueue_t::kevent_delete (fd_t fd_, short filter_)
+{
+    struct kevent ev;
+
+    EV_SET (&ev, fd_, filter_, EV_DELETE, 0, 0, NULL);
+    int rc = kevent (kqueue_fd, &ev, 1, NULL, 0, NULL);
+    errno_assert (rc != -1);
+}
+
+zs::handle_t zs::kqueue_t::add_fd (fd_t fd_, i_poll_events *reactor_)
+{
+    poll_entry_t *pe = new poll_entry_t;
+    zs_assert (pe != NULL);
+
+    pe->fd = fd_;
+    pe->flag_pollin = 0;
+    pe->flag_pollout = 0;
+    pe->reactor = reactor_;
+
+    handle_t handle;
+    handle.ptr = pe;
+    return handle;
+}
+
+void zs::kqueue_t::rm_fd (handle_t handle_)
+{
+    poll_entry_t *pe = (poll_entry_t*) handle_.ptr;
+    if (pe->flag_pollin)
+        kevent_delete (pe->fd, EVFILT_READ);
+    if (pe->flag_pollout)
+        kevent_delete (pe->fd, EVFILT_WRITE);
+    pe->fd = retired_fd;
+    retired.push_back (pe);
+}
+
+void zs::kqueue_t::set_pollin (handle_t handle_)
+{
+    poll_entry_t *pe = (poll_entry_t*) handle_.ptr;
+    pe->flag_pollin = true;
+    kevent_add (pe->fd, EVFILT_READ, pe);
+}
+
+void zs::kqueue_t::reset_pollin (handle_t handle_)
+{
+    poll_entry_t *pe = (poll_entry_t*) handle_.ptr;
+    pe->flag_pollin = false;
+    kevent_delete (pe->fd, EVFILT_READ);
+}
+
+void zs::kqueue_t::set_pollout (handle_t handle_)
+{
+    poll_entry_t *pe = (poll_entry_t*) handle_.ptr;
+    pe->flag_pollout = true;
+    kevent_add (pe->fd, EVFILT_WRITE, pe);
+}
+
+void zs::kqueue_t::reset_pollout (handle_t handle_)
+{
+    poll_entry_t *pe = (poll_entry_t*) handle_.ptr;
+    pe->flag_pollout = false;
+    kevent_delete (pe->fd, EVFILT_WRITE);
+}
+
+void zs::kqueue_t::add_timer (i_poll_events *events_)
+{
+     timers.push_back (events_);
+}
+
+void zs::kqueue_t::cancel_timer (i_poll_events *events_)
+{
+    timers_t::iterator it = std::find (timers.begin (), timers.end (), events_);
+    if (it != timers.end ())
+        timers.erase (it);
+}
+
+int zs::kqueue_t::get_load ()
+{
+    return load.get ();
+}
+
+void zs::kqueue_t::start ()
+{
+    worker.start (worker_routine, this);
+}
+
+void zs::kqueue_t::stop ()
+{
+    stopping = true;
+}
+
+void zs::kqueue_t::join ()
+{
+    worker.stop ();
+}
+
+void zs::kqueue_t::loop ()
+{
+    while (!stopping) {
+
+        struct kevent ev_buf [max_io_events];
+
+        //  Compute time interval to wait.
+        timespec timeout = {max_timer_period / 1000,
+            (max_timer_period % 1000) * 1000000};
+
+        //  Wait for events.
+        int n = kevent (kqueue_fd, NULL, 0,
+             &ev_buf [0], max_io_events, timers.empty () ? NULL : &timeout);
+        if (n == -1 && errno == EINTR)
+            continue;
+        errno_assert (n != -1);
+
+        //  Handle timer.
+        if (!n) {
+
+            //  Use local list of timers as timer handlers may fill new timers
+            //  into the original array.
+            timers_t t;
+            std::swap (timers, t);
+
+            //  Trigger all the timers.
+            for (timers_t::iterator it = t.begin (); it != t.end (); it ++)
+                (*it)->timer_event ();
+
+            continue;
+        }
+
+        for (int i = 0; i < n; i ++) {
+            poll_entry_t *pe = (poll_entry_t*) ev_buf [i].udata;
+
+            if (pe->fd == retired_fd)
+                continue;
+            if (ev_buf [i].flags & EV_EOF)
+                pe->reactor->in_event ();
+            if (pe->fd == retired_fd)
+                continue;
+            if (ev_buf [i].filter == EVFILT_WRITE)
+                pe->reactor->out_event ();
+            if (pe->fd == retired_fd)
+                continue;
+            if (ev_buf [i].filter == EVFILT_READ)
+                pe->reactor->in_event ();
+        }
+
+        //  Destroy retired event sources.
+        for (retired_t::iterator it = retired.begin (); it != retired.end ();
+              it ++)
+            delete *it;
+        retired.clear ();
+    }
+}
+
+void zs::kqueue_t::worker_routine (void *arg_)
+{
+    ((kqueue_t*) arg_)->loop ();
+}
+
+#endif