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random.h
1 /*
2  Copyright (C) 2003, 2005, 2006 MySQL AB
3  All rights reserved. Use is subject to license terms.
4 
5  This program is free software; you can redistribute it and/or modify
6  it under the terms of the GNU General Public License as published by
7  the Free Software Foundation; version 2 of the License.
8 
9  This program is distributed in the hope that it will be useful,
10  but WITHOUT ANY WARRANTY; without even the implied warranty of
11  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12  GNU General Public License for more details.
13 
14  You should have received a copy of the GNU General Public License
15  along with this program; if not, write to the Free Software
16  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
17 */
18 
19 #ifndef RANDOM_H
20 #define RANDOM_H
21 
22 /***************************************************************
23 * I N C L U D E D F I L E S *
24 ***************************************************************/
25 
26 /***************************************************************
27 * M A C R O S *
28 ***************************************************************/
29 
30 /***************************************************************/
31 /* C O N S T A N T S */
32 /***************************************************************/
33 
34 
35 /***************************************************************
36 * D A T A S T R U C T U R E S *
37 ***************************************************************/
38 
39 typedef struct {
40  unsigned int length;
41  unsigned int *values;
42  unsigned int currentIndex;
43 }RandomSequence;
44 
45 typedef struct {
46  unsigned int length;
47  unsigned int value;
48 }SequenceValues;
49 
50 /***************************************************************
51 * P U B L I C F U N C T I O N S *
52 ***************************************************************/
53 
54 #ifdef __cplusplus
55 extern "C" {
56 #endif
57 
58 
59 extern double getTps(unsigned int count, double timeValue);
60 
61 /*----------------------------*/
62 /* Random Sequences Functions */
63 /*----------------------------*/
64 extern int initSequence(RandomSequence *seq, SequenceValues *inputValues);
65 extern unsigned int getNextRandom(RandomSequence *seq);
66 extern void printSequence(RandomSequence *seq, unsigned int numPerRow);
67 
68 /*---------------------------------------------------*/
69 /* Code from the glibc, to make sure the same random */
70 /* number generator is used by all */
71 /*---------------------------------------------------*/
72 extern void myRandom48Init(long int seedval);
73 extern long int myRandom48(unsigned int maxValue);
74 
75 #ifdef __cplusplus
76 }
77 #endif
78 
79 /***************************************************************
80 * E X T E R N A L D A T A *
81 ***************************************************************/
82 
83 
84 
85 #endif /* RANDOM_H */
86