- initial checkin

1 files changed, 190 insertions, 0 deletions

diff --git a/httpd/poller.cpp b/httpd/poller.cpp
new file mode 100644
index 0000000..c604f55
--- /dev/null
+++ b/httpd/poller.cpp
@@ -0,0 +1,190 @@
+/* poller.cpp
+ * Copyright (C) 2005 Tommi Maekitalo
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * is provided AS IS, WITHOUT ANY WARRANTY; without even the implied
+ * warranty of MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, and
+ * NON-INFRINGEMENT.  See the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
+ *
+ */
+
+#include "tnt/poller.h"
+#include "tnt/tntnet.h"
+#include <cxxtools/log.h>
+#include <unistd.h>
+#include <fcntl.h>
+
+log_define("tntnet.poller")
+
+namespace tnt
+{
+  Poller::Poller(Jobqueue& q)
+    : queue(q),
+      poll_timeout(-1)
+  {
+    pipe(notify_pipe);
+    fcntl(notify_pipe[0], F_SETFL, O_NONBLOCK);
+
+    pollfds.reserve(16);
+    pollfds[0].fd = notify_pipe[0];
+    pollfds[0].events = POLLIN;
+    pollfds[0].revents = 0;
+  }
+
+  void Poller::append_new_jobs()
+  {
+    cxxtools::MutexLock lock(mutex);
+    if (!new_jobs.empty())
+    {
+      // append new jobs to current
+      log_debug("add " << new_jobs.size() << " new jobs to poll-list");
+
+      pollfds.reserve(current_jobs.size() + new_jobs.size() + 1);
+
+      time_t currentTime;
+      time(&currentTime);
+      for (jobs_type::iterator it = new_jobs.begin();
+           it != new_jobs.end(); ++it)
+      {
+        append(*it);
+        int msec;
+        if (poll_timeout < 0)
+          poll_timeout = (*it)->msecToTimeout(currentTime);
+        else if ((msec = (*it)->msecToTimeout(currentTime)) < poll_timeout)
+          poll_timeout = msec;
+      }
+
+      new_jobs.clear();
+    }
+  }
+
+  void Poller::append(Jobqueue::JobPtr& job)
+  {
+    current_jobs.push_back(job);
+
+    pollfd& p = *(pollfds.data() + current_jobs.size());
+    p.fd = job->getFd();
+    p.events = POLLIN;
+  }
+
+  void Poller::run()
+  {
+    while (!Tntnet::shouldStop())
+    {
+      append_new_jobs();
+
+      try
+      {
+        log_debug("poll timeout=" << poll_timeout);
+        ::poll(pollfds.data(), current_jobs.size() + 1, poll_timeout);
+        if (Tntnet::shouldStop())
+        {
+          log_warn("stop poller");
+          break;
+        }
+
+        poll_timeout = -1;
+
+        if (pollfds[0].revents != 0)
+        {
+          log_debug("read notify-pipe");
+          char ch;
+          ::read(notify_pipe[0], &ch, 1);
+          pollfds[0].revents = 0;
+        }
+
+        dispatch();
+      }
+      catch (const std::exception& e)
+      {
+        log_error("error in poll-loop: " << e.what());
+      }
+    }
+  }
+
+  void Poller::doStop()
+  {
+    log_debug("notify stop");
+    char ch = 'A';
+    ::write(notify_pipe[1], &ch, 1);
+  }
+
+  void Poller::dispatch()
+  {
+    log_debug("dispatch " << current_jobs.size() << " jobs");
+
+    time_t currentTime;
+    time(&currentTime);
+    for (unsigned i = 0; i < current_jobs.size(); )
+    {
+      if (pollfds[i + 1].revents & POLLIN)
+      {
+        log_debug("job found " << pollfds[i + 1].fd);
+
+        // put job into work-queue
+        queue.put(current_jobs[i]);
+        remove(i);
+      }
+      else if (pollfds[i + 1].revents != 0)
+      {
+        log_debug("pollevent " << std::hex << pollfds[i + 1].revents << " on fd "  << pollfds[i + 1].fd);
+        remove(i);
+      }
+      else
+      {
+        // check timeout
+        int msec = current_jobs[i]->msecToTimeout(currentTime);
+        if (msec <= 0)
+        {
+          log_debug("keep-alive-timeout reached");
+          remove(i);
+        }
+        else if (poll_timeout < 0 || msec < poll_timeout)
+          poll_timeout = msec;
+
+        ++i;
+      }
+    }
+  }
+
+  void Poller::remove(jobs_type::size_type n)
+  {
+    // replace job with last job in poller-list
+    jobs_type::size_type last = current_jobs.size() - 1;
+
+    if (n != last)
+    {
+      pollfds[n + 1] = pollfds[last + 1];
+      current_jobs[n] = current_jobs[last];
+    }
+
+    current_jobs.pop_back();
+  }
+
+  void Poller::addIdleJob(Jobqueue::JobPtr job)
+  {
+    log_debug("addIdleJob " << job->getFd());
+
+    {
+      cxxtools::MutexLock lock(mutex);
+      new_jobs.push_back(job);
+    }
+
+    log_debug("notify " << job->getFd());
+
+    char ch = 'A';
+    ::write(notify_pipe[1], &ch, 1);
+
+    log_debug("addIdleJob ready");
+  }
+
+}