db2/os/os_config.c

   1 /*-
   2  * See the file LICENSE for redistribution information.
   3  *
   4  * Copyright (c) 1997, 1998
   5  *      Sleepycat Software.  All rights reserved.
   6  */
   7
   8 #include "config.h"
   9
  10 #ifndef lint
  11 static const char sccsid[] = "@(#)os_config.c   10.30 (Sleepycat) 10/12/98";
  12 #endif /* not lint */
  13
  14 #ifndef NO_SYSTEM_INCLUDES
  15 #include <sys/types.h>
  16
  17 #include <errno.h>
  18 #endif
  19
  20 #include "db_int.h"
  21 #include "os_jump.h"
  22
  23 struct __db_jumptab __db_jump;
  24
  25 DB_GLOBALS __db_global_values = {
  26         1,                              /* DB_MUTEXLOCKS */
  27         0,                              /* DB_PAGEYIELD */
  28         0,                              /* DB_REGION_ANON, DB_REGION_NAME */
  29         0,                              /* DB_REGION_INIT */
  30         0,                              /* DB_TSL_SPINS */
  31         {NULL, &__db_global_values.db_envq.tqh_first},  /* Environemnt queue */
  32         {NULL, &__db_global_values.db_nameq.tqh_first}  /* Name queue */
  33 };
  34
  35 /*
  36  * db_jump_set --
  37  *      Replace functions for the DB package.
  38  */
  39 int
  40 db_jump_set(func, which)
  41         void *func;
  42         int which;
  43 {
  44         switch (which) {
  45         case DB_FUNC_CLOSE:
  46                 __db_jump.j_close = (int (*) __P((int)))func;
  47                 break;
  48         case DB_FUNC_DIRFREE:
  49                 __db_jump.j_dirfree = (void (*) __P((char **, int)))func;
  50                 break;
  51         case DB_FUNC_DIRLIST:
  52                 __db_jump.j_dirlist =
  53                     (int (*) __P((const char *, char ***, int *)))func;
  54                 break;
  55         case DB_FUNC_EXISTS:
  56                 __db_jump.j_exists = (int (*) __P((const char *, int *)))func;
  57                 break;
  58         case DB_FUNC_FREE:
  59                 __db_jump.j_free = (void (*) __P((void *)))func;
  60                 break;
  61         case DB_FUNC_FSYNC:
  62                 __db_jump.j_fsync = (int (*) __P((int)))func;
  63                 break;
  64         case DB_FUNC_IOINFO:
  65                 __db_jump.j_ioinfo = (int (*) __P((const char *,
  66                     int, u_int32_t *, u_int32_t *, u_int32_t *)))func;
  67                 break;
  68         case DB_FUNC_MALLOC:
  69                 __db_jump.j_malloc = (void *(*) __P((size_t)))func;
  70                 break;
  71         case DB_FUNC_MAP:
  72                 __db_jump.j_map = (int (*)
  73                     __P((char *, int, size_t, int, int, int, void **)))func;
  74                 break;
  75         case DB_FUNC_OPEN:
  76                 __db_jump.j_open = (int (*) __P((const char *, int, ...)))func;
  77                 break;
  78         case DB_FUNC_READ:
  79                 __db_jump.j_read =
  80                     (ssize_t (*) __P((int, void *, size_t)))func;
  81                 break;
  82         case DB_FUNC_REALLOC:
  83                 __db_jump.j_realloc = (void *(*) __P((void *, size_t)))func;
  84                 break;
  85         case DB_FUNC_RUNLINK:
  86                 __db_jump.j_runlink = (int (*) __P((char *)))func;
  87                 break;
  88         case DB_FUNC_SEEK:
  89                 __db_jump.j_seek = (int (*)
  90                     __P((int, size_t, db_pgno_t, u_int32_t, int, int)))func;
  91                 break;
  92         case DB_FUNC_SLEEP:
  93                 __db_jump.j_sleep = (int (*) __P((u_long, u_long)))func;
  94                 break;
  95         case DB_FUNC_UNLINK:
  96                 __db_jump.j_unlink = (int (*) __P((const char *)))func;
  97                 break;
  98         case DB_FUNC_UNMAP:
  99                 __db_jump.j_unmap = (int (*) __P((void *, size_t)))func;
 100                 break;
 101         case DB_FUNC_WRITE:
 102                 __db_jump.j_write =
 103                     (ssize_t (*) __P((int, const void *, size_t)))func;
 104                 break;
 105         case DB_FUNC_YIELD:
 106                 __db_jump.j_yield = (int (*) __P((void)))func;
 107                 break;
 108         default:
 109                 return (EINVAL);
 110         }
 111         return (0);
 112 }
 113
 114 /*
 115  * db_value_set --
 116  *      Replace values for the DB package.
 117  */
 118 int
 119 db_value_set(value, which)
 120         int value, which;
 121 {
 122         int ret;
 123
 124         switch (which) {
 125         case DB_MUTEXLOCKS:
 126                 DB_GLOBAL(db_mutexlocks) = value;
 127                 break;
 128         case DB_PAGEYIELD:
 129                 DB_GLOBAL(db_pageyield) = value;
 130                 break;
 131         case DB_REGION_ANON:
 132                 if (value != 0 && (ret = __db_mapanon_ok(0)) != 0)
 133                         return (ret);
 134                 DB_GLOBAL(db_region_anon) = value;
 135                 break;
 136         case DB_REGION_INIT:
 137                 DB_GLOBAL(db_region_init) = value;
 138                 break;
 139         case DB_REGION_NAME:
 140                 if (value != 0 && (ret = __db_mapanon_ok(1)) != 0)
 141                         return (ret);
 142                 DB_GLOBAL(db_region_anon) = value;
 143                 break;
 144         case DB_TSL_SPINS:
 145                 if (value <= 0)
 146                         return (EINVAL);
 147                 DB_GLOBAL(db_tsl_spins) = value;
 148                 break;
 149         default:
 150                 return (EINVAL);
 151         }
 152         return (0);
 153 }