Drizzled Public API Documentation

status_vars.h
00001 /*
00002  * Copyright (C) 2010 Joseph Daly <skinny.moey@gmail.com>
00003  * All rights reserved.
00004  *
00005  * Redistribution and use in source and binary forms, with or without
00006  * modification, are permitted provided that the following conditions are met:
00007  *
00008  *   * Redistributions of source code must retain the above copyright notice,
00009  *     this list of conditions and the following disclaimer.
00010  *   * Redistributions in binary form must reproduce the above copyright notice,
00011  *     this list of conditions and the following disclaimer in the documentation
00012  *     and/or other materials provided with the distribution.
00013  *   * Neither the name of Joseph Daly nor the names of its contributors
00014  *     may be used to endorse or promote products derived from this software
00015  *     without specific prior written permission.
00016  *
00017  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
00018  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
00019  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
00020  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
00021  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
00022  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
00023  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
00024  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
00025  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
00026  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
00027  * THE POSSIBILITY OF SUCH DAMAGE.
00028  */
00029 
00030 #pragma once
00031 
00032 namespace drizzled 
00033 { 
00034   class Session;
00035   class system_status_var;
00036 }
00037 
00038 class StatusVars
00039 {
00040 public:
00041   StatusVars();
00042 
00043   StatusVars(const StatusVars &status_vars);
00044 
00045   ~StatusVars();
00046 
00047   void reset();
00048 
00049   void logStatusVar(drizzled::Session *session);
00050 
00051   bool hasBeenFlushed(drizzled::Session *session);
00052 
00053   void merge(StatusVars *status_vars);
00054 
00055   void copySystemStatusVar(drizzled::system_status_var *to_var, 
00056                            drizzled::system_status_var *from_var);
00057 
00058   void copyGlobalVariables(StatusVars *status_vars);
00059 
00060   drizzled::system_status_var* getStatusVarCounters()
00061   {
00062     return status_var_counters;
00063   }
00064 
00065   uint64_t sent_row_count;
00066 
00067 private:
00068   drizzled::system_status_var *status_var_counters;
00069 
00070 };
00071