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/* -*- mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; -*-
* vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
*
* Copyright (C) 2008 Sun Microsystems, Inc.
*
* 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; version 2 of the License.
*
* This program 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
*/
#include <config.h>
#include <drizzled/errmsg_print.h>
#include <drizzled/error.h>
#include <drizzled/gettext.h>
#include <drizzled/plugin/listen.h>
#include <drizzled/plugin/listen.h>
#include <drizzled/plugin/null_client.h>
#ifdef HAVE_SYS_SOCKET_H
#include <sys/socket.h>
#endif
#include <poll.h>
namespace drizzled {
namespace plugin {
static std::vector<plugin::Listen*> listen_list;
std::vector<plugin::Listen*> listen_fd_list;
std::vector<pollfd> fd_list;
uint32_t fd_count= 0;
int wakeup_pipe[2];
ListenVector& Listen::getListenProtocols()
{
return listen_list;
}
bool Listen::addPlugin(plugin::Listen *listen_obj)
{
listen_list.push_back(listen_obj);
return false;
}
void Listen::removePlugin(plugin::Listen *listen_obj)
{
listen_list.erase(std::remove(listen_list.begin(), listen_list.end(), listen_obj), listen_list.end());
}
bool Listen::setup()
{
BOOST_FOREACH(plugin::Listen* it, listen_list)
{
std::vector<int> fds;
if (it->getFileDescriptors(fds))
{
errmsg_printf(error::ERROR, _("Error getting file descriptors"));
return true;
}
fd_list.resize(fd_count + fds.size() + 1);
BOOST_FOREACH(int fd, fds)
{
fd_list[fd_count].fd= fd;
fd_list[fd_count].events= POLLIN | POLLERR;
listen_fd_list.push_back(it);
fd_count++;
}
}
if (fd_count == 0)
{
errmsg_printf(error::ERROR, _("No sockets could be bound for listening"));
return true;
}
/*
We need a pipe to wakeup the listening thread since some operating systems
are stupid. *cough* OSX *cough*
*/
if (pipe(wakeup_pipe) == -1)
{
sql_perror("pipe()");
return true;
}
fd_list.resize(fd_count + 1);
fd_list[fd_count].fd= wakeup_pipe[0];
fd_list[fd_count].events= POLLIN | POLLERR;
fd_count++;
return false;
}
Client *plugin::Listen::getClient()
{
while (1)
{
int ready= poll(&fd_list[0], fd_count, -1);
if (ready == -1)
{
if (errno != EINTR)
{
sql_perror("poll()");
}
continue;
}
else if (ready == 0)
continue;
for (uint32_t x= 0; x < fd_count; x++)
{
if (fd_list[x].revents != POLLIN)
continue;
/* Check to see if the wakeup_pipe was written to. */
if (x == fd_count - 1)
{
/* Close all file descriptors now. */
for (x= 0; x < fd_count; x++)
{
(void) ::shutdown(fd_list[x].fd, SHUT_RDWR);
(void) close(fd_list[x].fd);
fd_list[x].fd= -1;
}
/* wakeup_pipe[0] was closed in the for loop above. */
(void) close(wakeup_pipe[1]);
return NULL;
}
if (plugin::Client* client= listen_fd_list[x]->getClient(fd_list[x].fd))
return client;
}
}
}
Client *plugin::Listen::getNullClient()
{
return new plugin::NullClient();
}
void Listen::shutdown()
{
ssize_t ret= write(wakeup_pipe[1], "\0", 1);
assert(ret == 1);
}
} /* namespace plugin */
} /* namespace drizzled */
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