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Viewing changes to plugin/multi_thread/multi_thread.h

  • Committer: Joe Daly
  • Date: 2010-03-08 04:23:54 UTC
  • mto: This revision was merged to the branch mainline in revision 1380.
  • Revision ID: skinny.moey@gmail.com-20100308042354-7k0jibdqaxkhac7o
scoreboard implementation for statistics

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plugin/multi_thread/multi_thread.h
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  You should have received a copy of the GNU General Public License
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  along with this program; if not, write to the Free Software
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  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA */
 
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  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA */
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#ifndef PLUGIN_MULTI_THREAD_MULTI_THREAD_H
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#define PLUGIN_MULTI_THREAD_MULTI_THREAD_H
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#include <drizzled/plugin/scheduler.h>
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#include "drizzled/internal/my_sys.h"
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#include <drizzled/sql_parse.h>
 
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#include <drizzled/session.h>
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#include <string>
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namespace drizzled {
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class Session;
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}
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class MultiThreadScheduler: public drizzled::plugin::Scheduler
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{
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private:
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  drizzled::atomic<uint32_t> thread_count;
 
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  pthread_attr_t attr;
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public:
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  MultiThreadScheduler(const char *name_arg): 
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    Scheduler(name_arg)
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  {
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    setStackSize();
 
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    struct sched_param tmp_sched_param;
 
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    memset(&tmp_sched_param, 0, sizeof(struct sched_param));
 
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    /* Setup attribute parameter for session threads. */
 
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    (void) pthread_attr_init(&attr);
 
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    (void) pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
 
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    pthread_attr_setscope(&attr, PTHREAD_SCOPE_SYSTEM);
 
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    tmp_sched_param.sched_priority= WAIT_PRIOR;
 
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    (void) pthread_attr_setschedparam(&attr, &tmp_sched_param);
 
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    thread_count= 0;
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  }
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  ~MultiThreadScheduler();
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  bool addSession(drizzled::Session::shared_ptr &session);
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  void killSessionNow(drizzled::Session::shared_ptr &session);
 
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  bool addSession(drizzled::Session *session);
 
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  void killSessionNow(drizzled::Session *session);
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  void runSession(drizzled::session_id_t);
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private:
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  void setStackSize();
 
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  void runSession(drizzled::Session *session)
 
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  {
 
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    if (drizzled::internal::my_thread_init())
 
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    {
 
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      session->disconnect(drizzled::ER_OUT_OF_RESOURCES, true);
 
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      statistic_increment(drizzled::aborted_connects, &LOCK_status);
 
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      killSessionNow(session);
 
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    }
 
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    session->thread_stack= (char*) &session;
 
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    session->run();
 
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    killSessionNow(session);
 
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  }
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};
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#endif /* PLUGIN_MULTI_THREAD_MULTI_THREAD_H */