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/* -*- mode: c; c-basic-offset: 2; indent-tabs-mode: nil; -*-
* vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
*
* Copyright (C) 2009 Sun Microsystems
*
* 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
*/
#ifndef PLUGIN_POOL_OF_THREADS_POOL_OF_THREADS_H
#define PLUGIN_POOL_OF_THREADS_POOL_OF_THREADS_H
#include <drizzled/gettext.h>
#include <drizzled/error.h>
#include <drizzled/plugin/scheduler.h>
#include <drizzled/sql_parse.h>
#include <drizzled/session.h>
#include <drizzled/plugin/client.h>
#include "session_scheduler.h"
#include <string>
#include <queue>
#include <set>
#include <event.h>
/**
* @brief
* Derived class for pool of threads scheduler.
*/
class PoolOfThreadsScheduler: public drizzled::plugin::Scheduler
{
private:
pthread_attr_t attr;
public:
PoolOfThreadsScheduler(const char *name_arg):
Scheduler(name_arg)
{
struct sched_param tmp_sched_param;
memset(&tmp_sched_param, 0, sizeof(struct sched_param));
/* Setup attribute parameter for session threads. */
(void) pthread_attr_init(&attr);
(void) pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
pthread_attr_setscope(&attr, PTHREAD_SCOPE_SYSTEM);
tmp_sched_param.sched_priority= WAIT_PRIOR;
(void) pthread_attr_setschedparam(&attr, &tmp_sched_param);
}
~PoolOfThreadsScheduler();
/**
* @brief
* Notify the thread pool about a new connection
*
* @param[in] the newly connected session
*
* @return
* True if there is an error.
*/
bool addSession(Session *session);
/**
* @brief
* Signal a waiting connection it's time to die.
*
* @details
* This function will signal libevent the Session should be killed.
*
* @param[in] session The connection to kill
*/
void killSession(Session *session);
/**
* @brief
* Create all threads for the thread pool
*
* @details
* After threads are created we wait until all threads has signaled that
* they have started before we return
*
* @retval 0 Ok
* @retval 1 We got an error creating the thread pool. In this case we will abort all created threads.
*/
bool libevent_init(void);
};
#endif /* PLUGIN_POOL_OF_THREADS_POOL_OF_THREADS_H */
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