Drizzled Public API Documentation

status_vars.cc
1 /*
2  * Copyright (C) 2010 Joseph Daly <skinny.moey@gmail.com>
3  * All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions are met:
7  *
8  * * Redistributions of source code must retain the above copyright notice,
9  * this list of conditions and the following disclaimer.
10  * * Redistributions in binary form must reproduce the above copyright notice,
11  * this list of conditions and the following disclaimer in the documentation
12  * and/or other materials provided with the distribution.
13  * * Neither the name of Joseph Daly nor the names of its contributors
14  * may be used to endorse or promote products derived from this software
15  * without specific prior written permission.
16  *
17  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
18  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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21  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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23  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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25  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
26  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
27  * THE POSSIBILITY OF SUCH DAMAGE.
28  */
29 
30 #include <config.h>
31 #include <drizzled/plugin.h>
32 #include <drizzled/statistics_variables.h>
33 #include <drizzled/session.h>
34 #include <drizzled/drizzled.h>
35 #include "status_vars.h"
36 
37 using namespace drizzled;
38 
39 StatusVars::StatusVars()
40 {
41  status_var_counters= (system_status_var*) malloc(sizeof(system_status_var));
42  memset(status_var_counters, 0, sizeof(system_status_var));
43  sent_row_count= 0;
44 }
45 
46 StatusVars::StatusVars(const StatusVars &status_vars)
47 {
48  status_var_counters= (system_status_var*) malloc(sizeof(system_status_var));
49  memset(status_var_counters, 0, sizeof(system_status_var));
50  copySystemStatusVar(status_var_counters, status_vars.status_var_counters);
51  sent_row_count= 0;
52 }
53 
54 StatusVars::~StatusVars()
55 {
56  free(status_var_counters);
57 }
58 
59 void StatusVars::copySystemStatusVar(system_status_var *to_var,
60  system_status_var *from_var)
61 {
62  uint64_t *end= (uint64_t*) ((unsigned char*) to_var + offsetof(system_status_var,
63  last_system_status_var) + sizeof(uint64_t));
64 
65  uint64_t *to= (uint64_t*) to_var;
66  uint64_t *from= (uint64_t*) from_var;
67 
68  while (to != end)
69  {
70  *(to++)= *(from++);
71  }
72  to_var->last_query_cost= from_var->last_query_cost;
73 }
74 
75 void StatusVars::merge(StatusVars *status_vars)
76 {
77  system_status_var* from_var= status_vars->getStatusVarCounters();
78 
79  uint64_t *end= (uint64_t*) ((unsigned char*) status_var_counters + offsetof(system_status_var,
80  last_system_status_var) + sizeof(uint64_t));
81 
82  uint64_t *to= (uint64_t*) status_var_counters;
83  uint64_t *from= (uint64_t*) from_var;
84 
85  while (to != end)
86  {
87  *(to++)+= *(from++);
88  }
89 
90  sent_row_count+= status_vars->sent_row_count;
91 }
92 
93 void StatusVars::reset()
94 {
95  memset(status_var_counters, 0, sizeof(system_status_var));
96  sent_row_count= 0;
97 }
98 
99 void StatusVars::logStatusVar(Session *session)
100 {
101  copySystemStatusVar(status_var_counters, &session->status_var);
102  sent_row_count+= session->sent_row_count;
103 }
104 
105 bool StatusVars::hasBeenFlushed(Session *session)
106 {
107  system_status_var *current_status_var= &session->status_var;
108 
109  /* check bytes received if its lower then a flush has occurred */
110  uint64_t current_bytes_received= current_status_var->bytes_received;
111  uint64_t my_bytes_received= status_var_counters->bytes_received;
112  return current_bytes_received < my_bytes_received;
113 }
114 
115 void StatusVars::copyGlobalVariables(StatusVars *global_status_vars)
116 {
117  system_status_var* from_var= global_status_vars->getStatusVarCounters();
118  status_var_counters->aborted_connects= from_var->aborted_connects;
119  status_var_counters->aborted_threads= from_var->aborted_threads;
120  status_var_counters->connection_time= from_var->connection_time;
121 }
TODO: Rename this file - func.h is stupid.
ha_rows sent_row_count
Definition: session.h:414