+/* This file is part of Metaproxy.
+ Copyright (C) Index Data
-/* $Id: thread_pool_observer.cpp,v 1.15 2006-03-29 13:44:45 adam Exp $
- Copyright (c) 2005-2006, Index Data.
+Metaproxy 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, or (at your option) any later
+version.
+
+Metaproxy 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 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
+*/
-%LICENSE%
- */
#include "config.hpp"
#if HAVE_UNISTD_H
#include <unistd.h>
#endif
+
#ifdef WIN32
+#include <windows.h>
#include <winsock.h>
#endif
-
-#if HAVE_SYS_SOCKET_H
-#include <sys/socket.h>
-#endif
-
#include <boost/thread/thread.hpp>
#include <boost/thread/mutex.hpp>
#include <boost/thread/condition.hpp>
#include <stdio.h>
#include <deque>
+#include <sstream>
#include <yazpp/socket-observer.h>
#include <yaz/log.h>
#include "thread_pool_observer.hpp"
#include "pipe.hpp"
-namespace mp = metaproxy_1;
-
namespace metaproxy_1 {
class ThreadPoolSocketObserver::Worker {
public:
boost::thread_group m_thrds;
boost::mutex m_mutex_input_data;
boost::condition m_cond_input_data;
+ boost::condition m_cond_input_full;
boost::mutex m_mutex_output_data;
std::deque<IThreadPoolMsg *> m_input;
std::deque<IThreadPoolMsg *> m_output;
bool m_stop_flag;
- int m_no_threads;
+ unsigned m_stack_size;
+ unsigned m_no_threads;
+ unsigned m_min_threads;
+ unsigned m_max_threads;
+ unsigned m_waiting_threads;
};
+ const unsigned int queue_size_per_thread = 64;
}
+
using namespace yazpp_1;
-using namespace mp;
+using namespace metaproxy_1;
-ThreadPoolSocketObserver::Rep::Rep(ISocketObservable *obs)
+ThreadPoolSocketObserver::Rep::Rep(yazpp_1::ISocketObservable *obs)
: m_socketObservable(obs), m_pipe(9123)
{
}
}
-ThreadPoolSocketObserver::ThreadPoolSocketObserver(ISocketObservable *obs,
- int no_threads)
+ThreadPoolSocketObserver::ThreadPoolSocketObserver(
+ yazpp_1::ISocketObservable *obs,
+ unsigned min_threads, unsigned max_threads,
+ unsigned stack_size)
: m_p(new Rep(obs))
{
obs->addObserver(m_p->m_pipe.read_fd(), this);
obs->maskObserver(this, SOCKET_OBSERVE_READ);
m_p->m_stop_flag = false;
- m_p->m_no_threads = no_threads;
- int i;
- for (i = 0; i<no_threads; i++)
- {
- Worker w(this);
- m_p->m_thrds.add_thread(new boost::thread(w));
- }
+ m_p->m_no_threads = 0;
+ m_p->m_min_threads = min_threads;
+ m_p->m_max_threads = max_threads;
+ m_p->m_waiting_threads = 0;
+ m_p->m_stack_size = stack_size;
+ unsigned i;
+ for (i = 0; i < min_threads; i++)
+ add_worker();
}
ThreadPoolSocketObserver::~ThreadPoolSocketObserver()
m_p->m_cond_input_data.notify_all();
}
m_p->m_thrds.join_all();
-
m_p->m_socketObservable->deleteObserver(this);
}
+void ThreadPoolSocketObserver::add_worker(void)
+{
+ Worker w(this);
+#if BOOST_VERSION >= 1050000
+ boost::thread::attributes attrs;
+ if (m_p->m_stack_size)
+ attrs.set_stack_size(m_stack_size);
+ boost::thread *x = new boost::thread(attrs, w);
+#else
+ boost::thread *x = new boost::thread(w);
+#endif
+ m_p->m_no_threads++;
+ m_p->m_thrds.add_thread(x);
+}
+
void ThreadPoolSocketObserver::socketNotify(int event)
{
if (event & SOCKET_OBSERVE_READ)
{
char buf[2];
+#ifdef WIN32
recv(m_p->m_pipe.read_fd(), buf, 1, 0);
+#else
+ ssize_t r = read(m_p->m_pipe.read_fd(), buf, 1);
+ if (r != 1)
+ {
+ if (r == (ssize_t) (-1))
+ yaz_log(YLOG_WARN|YLOG_ERRNO,
+ "ThreadPoolSocketObserver::socketNotify. read fail");
+ else
+ yaz_log(YLOG_WARN,
+ "ThreadPoolSocketObserver::socketNotify. read returned 0");
+ }
+#endif
IThreadPoolMsg *out;
{
boost::mutex::scoped_lock output_lock(m_p->m_mutex_output_data);
m_p->m_output.pop_front();
}
if (out)
- out->result();
+ {
+ std::ostringstream os;
+ {
+ boost::mutex::scoped_lock input_lock(m_p->m_mutex_input_data);
+ os << "tbusy/total " <<
+ m_p->m_no_threads - m_p->m_waiting_threads <<
+ "/" << m_p->m_no_threads
+ << " queue in/out " << m_p->m_input.size() << "/"
+ << m_p->m_output.size();
+ }
+ out->result(os.str().c_str());
+ }
}
}
+void ThreadPoolSocketObserver::get_thread_info(int &tbusy, int &total)
+{
+ tbusy = m_p->m_no_threads - m_p->m_waiting_threads;
+ total = m_p->m_no_threads;
+}
+
void ThreadPoolSocketObserver::run(void *p)
{
while(1)
IThreadPoolMsg *in = 0;
{
boost::mutex::scoped_lock input_lock(m_p->m_mutex_input_data);
+ m_p->m_waiting_threads++;
while (!m_p->m_stop_flag && m_p->m_input.size() == 0)
m_p->m_cond_input_data.wait(input_lock);
+ m_p->m_waiting_threads--;
if (m_p->m_stop_flag)
break;
-
+
in = m_p->m_input.front();
m_p->m_input.pop_front();
+ m_p->m_cond_input_full.notify_all();
}
IThreadPoolMsg *out = in->handle();
{
boost::mutex::scoped_lock output_lock(m_p->m_mutex_output_data);
m_p->m_output.push_back(out);
+#ifdef WIN32
send(m_p->m_pipe.write_fd(), "", 1, 0);
+#else
+ ssize_t r = write(m_p->m_pipe.write_fd(), "", 1);
+ if (r != 1)
+ {
+ if (r == (ssize_t) (-1))
+ yaz_log(YLOG_WARN|YLOG_ERRNO,
+ "ThreadPoolSocketObserver::run. write fail");
+ else
+ yaz_log(YLOG_WARN,
+ "ThreadPoolSocketObserver::run. write returned 0");
+ }
+#endif
+ }
+ }
+}
+
+void ThreadPoolSocketObserver::cleanup(IThreadPoolMsg *m, void *info)
+{
+ boost::mutex::scoped_lock input_lock(m_p->m_mutex_input_data);
+
+ std::deque<IThreadPoolMsg *>::iterator it = m_p->m_input.begin();
+ while (it != m_p->m_input.end())
+ {
+ if ((*it)->cleanup(info))
+ {
+ delete *it;
+ it = m_p->m_input.erase(it);
}
+ else
+ it++;
}
}
void ThreadPoolSocketObserver::put(IThreadPoolMsg *m)
{
boost::mutex::scoped_lock input_lock(m_p->m_mutex_input_data);
+ if (m_p->m_waiting_threads == 0 &&
+ m_p->m_no_threads < m_p->m_max_threads)
+ {
+ add_worker();
+ }
+ while (m_p->m_input.size() >= m_p->m_no_threads * queue_size_per_thread)
+ m_p->m_cond_input_full.wait(input_lock);
m_p->m_input.push_back(m);
m_p->m_cond_input_data.notify_one();
}
+
/*
* Local variables:
* c-basic-offset: 4
+ * c-file-style: "Stroustrup"
* indent-tabs-mode: nil
- * c-file-style: "stroustrup"
* End:
* vim: shiftwidth=4 tabstop=8 expandtab
*/
projects / metaproxy-moved-to-github.git / blobdiff