1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21 /*
  22  * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
  23  * Use is subject to license terms.
  24  */
  25 
  26 #ifndef _FB_RANDOM_H
  27 #define _FB_RANDOM_H
  28 
  29 #pragma ident   "%Z%%M% %I%     %E% SMI"
  30 
  31 #include "config.h"
  32 
  33 #ifdef HAVE_STDINT_H
  34 #include <stdint.h>
  35 #endif
  36 
  37 #ifdef  __cplusplus
  38 extern "C" {
  39 #endif
  40 
  41 /*
  42  * probability table entry, used while parsing the supplied
  43  * probability table
  44  */
  45 typedef struct probtabent {
  46         struct probtabent       *pte_next;
  47         avd_t                   pte_percent;
  48         avd_t                   pte_segmin;
  49         avd_t                   pte_segmax;
  50 } probtabent_t;
  51 
  52 /*
  53  * The supplied probability table is converted into a probability funtion
  54  * lookup table at initialization time. This is the definition for each
  55  * entry in the table.
  56  */
  57 typedef struct randfunc {
  58         double          rf_base;
  59         double          rf_range;
  60 } randfunc_t;
  61 
  62 /* Number of entries in the probability function table */
  63 #define PF_TAB_SIZE     100
  64 
  65 /*
  66  * Random Distribution definition object. Includes a pointer to the
  67  * appropriate function to access the distribution defined by the object,
  68  * as well as a function pointer to the specified source of random
  69  * numbers.
  70  */
  71 typedef struct randdist {
  72         double          (*rnd_get)(struct randdist *);
  73         double          (*rnd_src)(unsigned short *);
  74         struct randdist *rnd_next;
  75         struct var      *rnd_var;
  76         avd_t           rnd_seed;
  77         avd_t           rnd_mean;
  78         avd_t           rnd_gamma;
  79         avd_t           rnd_min;
  80         avd_t           rnd_round;
  81         double          rnd_dbl_mean;
  82         double          rnd_dbl_gamma;
  83         fbint_t         rnd_vint_min;
  84         fbint_t         rnd_vint_round;
  85         probtabent_t    *rnd_probtabs;
  86         randfunc_t      rnd_rft[PF_TAB_SIZE];
  87         uint16_t        rnd_xi[3];
  88         uint16_t        rnd_type;
  89 } randdist_t;
  90 
  91 #define RAND_TYPE_UNIFORM       0x1
  92 #define RAND_TYPE_GAMMA         0x2
  93 #define RAND_TYPE_TABLE         0x3
  94 #define RAND_TYPE_MASK          0x0fff
  95 #define RAND_SRC_URANDOM        0x0000
  96 #define RAND_SRC_GENERATOR      0x1000
  97 
  98 #define RAND_PARAM_TYPE         1
  99 #define RAND_PARAM_SRC          2
 100 #define RAND_PARAM_SEED         3
 101 #define RAND_PARAM_MIN          4
 102 #define RAND_PARAM_MEAN         5
 103 #define RAND_PARAM_GAMMA        6
 104 #define RAND_PARAM_ROUND        7
 105 
 106 randdist_t *randdist_alloc(void);
 107 void randdist_init(void);
 108 int filebench_randomno32(uint32_t *, uint32_t, uint32_t, avd_t);
 109 int filebench_randomno64(uint64_t *, uint64_t, uint64_t, avd_t);
 110 void fb_random_init(void);
 111 
 112 #ifdef  __cplusplus
 113 }
 114 #endif
 115 
 116 #endif  /* _FB_RANDOM_H */