1 | /* DO NOT EDIT: automatically built by dist/s_win32. */ |
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2 | /*- |
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3 | * See the file LICENSE for redistribution information. |
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4 | * |
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5 | * Copyright (c) 1996-2002 |
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6 | * Sleepycat Software. All rights reserved. |
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7 | * |
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8 | * $Id: db_int.h,v 1.1.1.1 2004-12-17 17:26:48 ghudson Exp $ |
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9 | */ |
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10 | |
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11 | #ifndef _DB_INTERNAL_H_ |
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12 | #define _DB_INTERNAL_H_ |
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13 | |
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14 | /******************************************************* |
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15 | * System includes, db.h, a few general DB includes. The DB includes are |
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16 | * here because it's OK if db_int.h includes queue structure declarations. |
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17 | *******************************************************/ |
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18 | #ifndef NO_SYSTEM_INCLUDES |
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19 | #if defined(__STDC__) || defined(__cplusplus) |
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20 | #include <stdarg.h> |
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21 | #else |
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22 | #include <varargs.h> |
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23 | #endif |
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24 | #include <errno.h> |
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25 | #endif |
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26 | |
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27 | #include "db.h" |
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28 | |
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29 | #include "dbinc/queue.h" |
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30 | #include "dbinc/shqueue.h" |
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31 | |
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32 | #if defined(__cplusplus) |
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33 | extern "C" { |
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34 | #endif |
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35 | |
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36 | /******************************************************* |
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37 | * General purpose constants and macros. |
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38 | *******************************************************/ |
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39 | #define UINT16_T_MAX 0xffff /* Maximum 16 bit unsigned. */ |
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40 | #define UINT32_T_MAX 0xffffffff /* Maximum 32 bit unsigned. */ |
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41 | |
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42 | #define MEGABYTE 1048576 |
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43 | #define GIGABYTE 1073741824 |
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44 | |
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45 | #define MS_PER_SEC 1000 /* Milliseconds in a second. */ |
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46 | #define USEC_PER_MS 1000 /* Microseconds in a millisecond. */ |
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47 | |
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48 | #define RECNO_OOB 0 /* Illegal record number. */ |
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49 | |
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50 | /* Test for a power-of-two (tests true for zero, which doesn't matter here). */ |
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51 | #define POWER_OF_TWO(x) (((x) & ((x) - 1)) == 0) |
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52 | |
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53 | /* Test for valid page sizes. */ |
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54 | #define DB_MIN_PGSIZE 0x000200 /* Minimum page size (512). */ |
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55 | #define DB_MAX_PGSIZE 0x010000 /* Maximum page size (65536). */ |
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56 | #define IS_VALID_PAGESIZE(x) \ |
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57 | (POWER_OF_TWO(x) && (x) >= DB_MIN_PGSIZE && ((x) <= DB_MAX_PGSIZE)) |
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58 | |
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59 | /* Minimum number of pages cached, by default. */ |
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60 | #define DB_MINPAGECACHE 16 |
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61 | |
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62 | /* |
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63 | * If we are unable to determine the underlying filesystem block size, use |
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64 | * 8K on the grounds that most OS's use less than 8K for a VM page size. |
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65 | */ |
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66 | #define DB_DEF_IOSIZE (8 * 1024) |
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67 | |
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68 | /* |
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69 | * Aligning items to particular sizes or in pages or memory. |
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70 | * |
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71 | * db_align_t -- |
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72 | * Largest integral type, used to align structures in memory. We don't store |
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73 | * floating point types in structures, so integral types should be sufficient |
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74 | * (and we don't have to worry about systems that store floats in other than |
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75 | * power-of-2 numbers of bytes). Additionally this fixes compiler that rewrite |
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76 | * structure assignments and ANSI C memcpy calls to be in-line instructions |
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77 | * that happen to require alignment. Note: this alignment isn't sufficient for |
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78 | * mutexes, which depend on things like cache line alignment. Mutex alignment |
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79 | * is handled separately, in mutex.h. |
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80 | * |
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81 | * db_alignp_t -- |
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82 | * Integral type that's the same size as a pointer. There are places where |
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83 | * DB modifies pointers by discarding the bottom bits to guarantee alignment. |
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84 | * We can't use db_align_t, it may be larger than the pointer, and compilers |
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85 | * get upset about that. So far we haven't run on any machine where there |
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86 | * isn't an integral type the same size as a pointer -- here's hoping. |
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87 | */ |
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88 | typedef unsigned long db_align_t; |
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89 | typedef unsigned long db_alignp_t; |
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90 | |
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91 | /* Align an integer to a specific boundary. */ |
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92 | #undef ALIGN |
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93 | #define ALIGN(v, bound) (((v) + (bound) - 1) & ~(((db_align_t)bound) - 1)) |
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94 | |
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95 | /* |
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96 | * Print an address as a u_long (a u_long is the largest type we can print |
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97 | * portably). Most 64-bit systems have made longs 64-bits, so this should |
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98 | * work. |
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99 | */ |
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100 | #define P_TO_ULONG(p) ((u_long)(db_alignp_t)(p)) |
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101 | |
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102 | /* |
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103 | * Convert a pointer to a small integral value. |
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104 | * |
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105 | * The (u_int16_t)(db_alignp_t) cast avoids warnings: the (db_alignp_t) cast |
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106 | * converts the value to an integral type, and the (u_int16_t) cast converts |
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107 | * it to a small integral type so we don't get complaints when we assign the |
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108 | * final result to an integral type smaller than db_alignp_t. |
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109 | */ |
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110 | #define P_TO_UINT32(p) ((u_int32_t)(db_alignp_t)(p)) |
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111 | #define P_TO_UINT16(p) ((u_int16_t)(db_alignp_t)(p)) |
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112 | |
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113 | /* |
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114 | * There are several on-page structures that are declared to have a number of |
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115 | * fields followed by a variable length array of items. The structure size |
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116 | * without including the variable length array or the address of the first of |
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117 | * those elements can be found using SSZ. |
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118 | * |
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119 | * This macro can also be used to find the offset of a structure element in a |
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120 | * structure. This is used in various places to copy structure elements from |
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121 | * unaligned memory references, e.g., pointers into a packed page. |
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122 | * |
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123 | * There are two versions because compilers object if you take the address of |
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124 | * an array. |
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125 | */ |
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126 | #undef SSZ |
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127 | #define SSZ(name, field) P_TO_UINT16(&(((name *)0)->field)) |
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128 | |
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129 | #undef SSZA |
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130 | #define SSZA(name, field) P_TO_UINT16(&(((name *)0)->field[0])) |
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131 | |
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132 | /* Structure used to print flag values. */ |
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133 | typedef struct __fn { |
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134 | u_int32_t mask; /* Flag value. */ |
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135 | const char *name; /* Flag name. */ |
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136 | } FN; |
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137 | |
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138 | /* Set, clear and test flags. */ |
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139 | #define FLD_CLR(fld, f) (fld) &= ~(f) |
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140 | #define FLD_ISSET(fld, f) ((fld) & (f)) |
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141 | #define FLD_SET(fld, f) (fld) |= (f) |
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142 | #define F_CLR(p, f) (p)->flags &= ~(f) |
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143 | #define F_ISSET(p, f) ((p)->flags & (f)) |
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144 | #define F_SET(p, f) (p)->flags |= (f) |
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145 | #define LF_CLR(f) ((flags) &= ~(f)) |
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146 | #define LF_ISSET(f) ((flags) & (f)) |
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147 | #define LF_SET(f) ((flags) |= (f)) |
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148 | |
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149 | /* Display separator string. */ |
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150 | #undef DB_LINE |
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151 | #define DB_LINE "=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=" |
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152 | |
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153 | /* Unused, or not-used-yet variable. "Shut that bloody compiler up!" */ |
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154 | #define COMPQUIET(n, v) (n) = (v) |
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155 | |
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156 | /******************************************************* |
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157 | * API return values |
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158 | *******************************************************/ |
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159 | /* |
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160 | * Return values that are OK for each different call. Most calls have |
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161 | * a standard 'return of 0 is only OK value', but some, like db->get |
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162 | * have DB_NOTFOUND as a return value, but it really isn't an error. |
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163 | */ |
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164 | #define DB_RETOK_STD(ret) ((ret) == 0) |
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165 | #define DB_RETOK_DBCDEL(ret) ((ret) == 0 || (ret) == DB_KEYEMPTY || \ |
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166 | (ret) == DB_NOTFOUND) |
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167 | #define DB_RETOK_DBCGET(ret) DB_RETOK_DBGET(ret) |
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168 | #define DB_RETOK_DBCPUT(ret) ((ret) == 0 || (ret) == DB_KEYEXIST || \ |
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169 | (ret) == DB_NOTFOUND) |
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170 | #define DB_RETOK_DBDEL(ret) ((ret) == 0 || (ret) == DB_NOTFOUND) |
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171 | #define DB_RETOK_DBGET(ret) ((ret) == 0 || (ret) == DB_KEYEMPTY || \ |
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172 | (ret) == DB_NOTFOUND) |
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173 | #define DB_RETOK_DBPUT(ret) ((ret) == 0 || (ret) == DB_KEYEXIST) |
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174 | #define DB_RETOK_LGGET(ret) ((ret) == 0 || (ret) == DB_NOTFOUND) |
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175 | #define DB_RETOK_MPGET(ret) ((ret) == 0 || (ret) == DB_PAGE_NOTFOUND) |
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176 | #define DB_RETOK_REPPMSG(ret) ((ret) == 0 || (ret) == DB_REP_NEWMASTER || \ |
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177 | (ret) == DB_REP_NEWSITE) |
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178 | |
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179 | /******************************************************* |
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180 | * Files. |
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181 | *******************************************************/ |
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182 | /* |
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183 | * We use 1024 as the maximum path length. It's too hard to figure out what |
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184 | * the real path length is, as it was traditionally stored in <sys/param.h>, |
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185 | * and that file isn't always available. |
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186 | */ |
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187 | #undef MAXPATHLEN |
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188 | #define MAXPATHLEN 1024 |
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189 | |
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190 | #define PATH_DOT "." /* Current working directory. */ |
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191 | #define PATH_SEPARATOR "\\/:" /* Path separator character(s). */ |
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192 | |
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193 | /* |
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194 | * Flags understood by __os_open. |
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195 | */ |
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196 | #define DB_OSO_CREATE 0x0001 /* POSIX: O_CREAT */ |
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197 | #define DB_OSO_DIRECT 0x0002 /* Don't buffer the file in the OS. */ |
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198 | #define DB_OSO_EXCL 0x0004 /* POSIX: O_EXCL */ |
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199 | #define DB_OSO_LOG 0x0008 /* Opening a log file. */ |
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200 | #define DB_OSO_RDONLY 0x0010 /* POSIX: O_RDONLY */ |
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201 | #define DB_OSO_REGION 0x0020 /* Opening a region file. */ |
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202 | #define DB_OSO_SEQ 0x0040 /* Expected sequential access. */ |
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203 | #define DB_OSO_TEMP 0x0080 /* Remove after last close. */ |
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204 | #define DB_OSO_TRUNC 0x0100 /* POSIX: O_TRUNC */ |
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205 | |
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206 | /* |
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207 | * Seek options understood by __os_seek. |
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208 | */ |
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209 | typedef enum { |
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210 | DB_OS_SEEK_CUR, /* POSIX: SEEK_CUR */ |
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211 | DB_OS_SEEK_END, /* POSIX: SEEK_END */ |
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212 | DB_OS_SEEK_SET /* POSIX: SEEK_SET */ |
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213 | } DB_OS_SEEK; |
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214 | |
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215 | /******************************************************* |
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216 | * Environment. |
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217 | *******************************************************/ |
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218 | /* Type passed to __db_appname(). */ |
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219 | typedef enum { |
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220 | DB_APP_NONE=0, /* No type (region). */ |
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221 | DB_APP_DATA, /* Data file. */ |
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222 | DB_APP_LOG, /* Log file. */ |
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223 | DB_APP_TMP /* Temporary file. */ |
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224 | } APPNAME; |
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225 | |
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226 | /* |
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227 | * CDB_LOCKING CDB product locking. |
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228 | * CRYPTO_ON Security has been configured. |
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229 | * LOCKING_ON Locking has been configured. |
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230 | * LOGGING_ON Logging has been configured. |
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231 | * MPOOL_ON Memory pool has been configured. |
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232 | * RPC_ON RPC has been configured. |
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233 | * TXN_ON Transactions have been configured. |
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234 | */ |
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235 | #define CDB_LOCKING(dbenv) F_ISSET(dbenv, DB_ENV_CDB) |
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236 | #define CRYPTO_ON(dbenv) ((dbenv)->crypto_handle != NULL) |
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237 | #define LOCKING_ON(dbenv) ((dbenv)->lk_handle != NULL) |
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238 | #define LOGGING_ON(dbenv) ((dbenv)->lg_handle != NULL) |
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239 | #define MPOOL_ON(dbenv) ((dbenv)->mp_handle != NULL) |
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240 | #define RPC_ON(dbenv) ((dbenv)->cl_handle != NULL) |
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241 | #define TXN_ON(dbenv) ((dbenv)->tx_handle != NULL) |
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242 | |
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243 | /* |
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244 | * STD_LOCKING Standard locking, that is, locking was configured and CDB |
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245 | * was not. We do not do locking in off-page duplicate trees, |
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246 | * so we check for that in the cursor first. |
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247 | */ |
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248 | #define STD_LOCKING(dbc) \ |
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249 | (!F_ISSET(dbc, DBC_OPD) && \ |
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250 | !CDB_LOCKING((dbc)->dbp->dbenv) && LOCKING_ON((dbc)->dbp->dbenv)) |
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251 | |
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252 | /* |
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253 | * IS_RECOVERING: The system is running recovery. |
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254 | */ |
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255 | #define IS_RECOVERING(dbenv) \ |
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256 | (LOGGING_ON(dbenv) && \ |
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257 | F_ISSET((DB_LOG *)(dbenv)->lg_handle, DBLOG_RECOVER)) |
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258 | |
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259 | /* Initialization methods are often illegal before/after open is called. */ |
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260 | #define ENV_ILLEGAL_AFTER_OPEN(dbenv, name) \ |
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261 | if (F_ISSET((dbenv), DB_ENV_OPEN_CALLED)) \ |
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262 | return (__db_mi_open(dbenv, name, 1)); |
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263 | #define ENV_ILLEGAL_BEFORE_OPEN(dbenv, name) \ |
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264 | if (!F_ISSET((dbenv), DB_ENV_OPEN_CALLED)) \ |
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265 | return (__db_mi_open(dbenv, name, 0)); |
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266 | |
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267 | /* We're not actually user hostile, honest. */ |
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268 | #define ENV_REQUIRES_CONFIG(dbenv, handle, i, flags) \ |
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269 | if (handle == NULL) \ |
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270 | return (__db_env_config(dbenv, i, flags)); |
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271 | |
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272 | /******************************************************* |
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273 | * Database Access Methods. |
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274 | *******************************************************/ |
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275 | /* |
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276 | * DB_IS_THREADED -- |
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277 | * The database handle is free-threaded (was opened with DB_THREAD). |
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278 | */ |
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279 | #define DB_IS_THREADED(dbp) \ |
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280 | ((dbp)->mutexp != NULL) |
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281 | |
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282 | /* Initialization methods are often illegal before/after open is called. */ |
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283 | #define DB_ILLEGAL_AFTER_OPEN(dbp, name) \ |
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284 | if (F_ISSET((dbp), DB_AM_OPEN_CALLED)) \ |
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285 | return (__db_mi_open((dbp)->dbenv, name, 1)); |
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286 | #define DB_ILLEGAL_BEFORE_OPEN(dbp, name) \ |
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287 | if (!F_ISSET((dbp), DB_AM_OPEN_CALLED)) \ |
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288 | return (__db_mi_open((dbp)->dbenv, name, 0)); |
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289 | /* Some initialization methods are illegal if environment isn't local. */ |
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290 | #define DB_ILLEGAL_IN_ENV(dbp, name) \ |
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291 | if (!F_ISSET((dbp)->dbenv, DB_ENV_DBLOCAL)) \ |
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292 | return (__db_mi_env((dbp)->dbenv, name)); |
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293 | #define DB_ILLEGAL_METHOD(dbp, flags) { \ |
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294 | int __ret; \ |
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295 | if ((__ret = __dbh_am_chk(dbp, flags)) != 0) \ |
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296 | return (__ret); \ |
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297 | } |
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298 | |
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299 | /* |
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300 | * Common DBC->internal fields. Each access method adds additional fields |
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301 | * to this list, but the initial fields are common. |
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302 | */ |
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303 | #define __DBC_INTERNAL \ |
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304 | DBC *opd; /* Off-page duplicate cursor. */\ |
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305 | \ |
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306 | void *page; /* Referenced page. */ \ |
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307 | db_pgno_t root; /* Tree root. */ \ |
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308 | db_pgno_t pgno; /* Referenced page number. */ \ |
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309 | db_indx_t indx; /* Referenced key item index. */\ |
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310 | \ |
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311 | DB_LOCK lock; /* Cursor lock. */ \ |
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312 | db_lockmode_t lock_mode; /* Lock mode. */ |
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313 | |
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314 | struct __dbc_internal { |
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315 | __DBC_INTERNAL |
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316 | }; |
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317 | |
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318 | /* Actions that __db_master_update can take. */ |
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319 | typedef enum { MU_REMOVE, MU_RENAME, MU_OPEN } mu_action; |
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320 | |
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321 | /* |
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322 | * Access-method-common macro for determining whether a cursor |
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323 | * has been initialized. |
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324 | */ |
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325 | #define IS_INITIALIZED(dbc) ((dbc)->internal->pgno != PGNO_INVALID) |
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326 | |
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327 | /* Free the callback-allocated buffer, if necessary, hanging off of a DBT. */ |
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328 | #define FREE_IF_NEEDED(sdbp, dbt) \ |
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329 | if (F_ISSET((dbt), DB_DBT_APPMALLOC)) { \ |
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330 | __os_ufree((sdbp)->dbenv, (dbt)->data); \ |
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331 | F_CLR((dbt), DB_DBT_APPMALLOC); \ |
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332 | } |
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333 | |
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334 | /* |
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335 | * Use memory belonging to object "owner" to return the results of |
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336 | * any no-DBT-flag get ops on cursor "dbc". |
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337 | */ |
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338 | #define SET_RET_MEM(dbc, owner) \ |
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339 | do { \ |
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340 | (dbc)->rskey = &(owner)->my_rskey; \ |
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341 | (dbc)->rkey = &(owner)->my_rkey; \ |
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342 | (dbc)->rdata = &(owner)->my_rdata; \ |
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343 | } while (0) |
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344 | |
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345 | /* Use the return-data memory src is currently set to use in dest as well. */ |
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346 | #define COPY_RET_MEM(src, dest) \ |
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347 | do { \ |
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348 | (dest)->rskey = (src)->rskey; \ |
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349 | (dest)->rkey = (src)->rkey; \ |
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350 | (dest)->rdata = (src)->rdata; \ |
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351 | } while (0) |
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352 | |
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353 | /* Reset the returned-memory pointers to their defaults. */ |
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354 | #define RESET_RET_MEM(dbc) \ |
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355 | do { \ |
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356 | (dbc)->rskey = &(dbc)->my_rskey; \ |
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357 | (dbc)->rkey = &(dbc)->my_rkey; \ |
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358 | (dbc)->rdata = &(dbc)->my_rdata; \ |
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359 | } while (0) |
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360 | |
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361 | /******************************************************* |
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362 | * Mpool. |
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363 | *******************************************************/ |
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364 | /* |
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365 | * File types for DB access methods. Negative numbers are reserved to DB. |
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366 | */ |
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367 | #define DB_FTYPE_SET -1 /* Call pgin/pgout functions. */ |
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368 | #define DB_FTYPE_NOTSET 0 /* Don't call... */ |
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369 | |
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370 | /* Structure used as the DB pgin/pgout pgcookie. */ |
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371 | typedef struct __dbpginfo { |
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372 | size_t db_pagesize; /* Underlying page size. */ |
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373 | u_int32_t flags; /* Some DB_AM flags needed. */ |
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374 | DBTYPE type; /* DB type */ |
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375 | } DB_PGINFO; |
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376 | |
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377 | /******************************************************* |
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378 | * Log. |
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379 | *******************************************************/ |
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380 | /* Initialize an LSN to 'zero'. */ |
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381 | #define ZERO_LSN(LSN) do { \ |
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382 | (LSN).file = 0; \ |
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383 | (LSN).offset = 0; \ |
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384 | } while (0) |
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385 | #define IS_ZERO_LSN(LSN) ((LSN).file == 0) |
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386 | |
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387 | #define IS_INIT_LSN(LSN) ((LSN).file == 1 && (LSN).offset == 0) |
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388 | #define INIT_LSN(LSN) do { \ |
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389 | (LSN).file = 1; \ |
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390 | (LSN).offset = 0; \ |
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391 | } while (0) |
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392 | |
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393 | #define MAX_LSN(LSN) do { \ |
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394 | (LSN).file = UINT32_T_MAX; \ |
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395 | (LSN).offset = UINT32_T_MAX; \ |
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396 | } while (0) |
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397 | #define IS_MAX_LSN(LSN) \ |
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398 | ((LSN).file == UINT32_T_MAX && (LSN).offset == UINT32_T_MAX) |
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399 | |
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400 | /* If logging is turned off, smash the lsn. */ |
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401 | #define LSN_NOT_LOGGED(LSN) do { \ |
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402 | (LSN).file = 0; \ |
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403 | (LSN).offset = 1; \ |
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404 | } while (0) |
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405 | #define IS_NOT_LOGGED_LSN(LSN) \ |
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406 | ((LSN).file == 0 && (LSN).offset == 1) |
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407 | |
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408 | /* |
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409 | * Test if the environment is currently logging changes. If we're in |
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410 | * recovery or we're a replication client, we don't need to log changes |
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411 | * because they're already in the log, even though we have a fully functional |
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412 | * log system. |
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413 | */ |
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414 | #define DBENV_LOGGING(dbenv) \ |
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415 | (LOGGING_ON(dbenv) && !F_ISSET((dbenv), DB_ENV_REP_CLIENT) && \ |
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416 | (!IS_RECOVERING(dbenv))) |
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417 | |
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418 | /* |
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419 | * Test if we need to log a change. Note that the DBC_RECOVER flag is set |
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420 | * when we're in abort, as well as during recovery; thus DBC_LOGGING may be |
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421 | * false for a particular dbc even when DBENV_LOGGING is true. |
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422 | * |
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423 | * We explicitly use LOGGING_ON/DB_ENV_REP_CLIENT here because we don't |
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424 | * want to have to pull in the log headers, which IS_RECOVERING (and thus |
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425 | * DBENV_LOGGING) rely on, and because DBC_RECOVER should be set anytime |
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426 | * IS_RECOVERING would be true. |
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427 | */ |
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428 | #define DBC_LOGGING(dbc) \ |
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429 | (LOGGING_ON((dbc)->dbp->dbenv) && !F_ISSET((dbc), DBC_RECOVER) && \ |
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430 | !F_ISSET((dbc)->dbp->dbenv, DB_ENV_REP_CLIENT)) |
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431 | |
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432 | /******************************************************* |
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433 | * Txn. |
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434 | *******************************************************/ |
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435 | #define DB_NONBLOCK(C) ((C)->txn != NULL && F_ISSET((C)->txn, TXN_NOWAIT)) |
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436 | #define IS_SUBTRANSACTION(txn) \ |
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437 | ((txn) != NULL && (txn)->parent != NULL) |
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438 | |
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439 | /******************************************************* |
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440 | * Crypto. |
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441 | *******************************************************/ |
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442 | #define DB_IV_BYTES 16 /* Bytes per IV */ |
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443 | #define DB_MAC_KEY 20 /* Bytes per MAC checksum */ |
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444 | |
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445 | /******************************************************* |
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446 | * Forward structure declarations. |
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447 | *******************************************************/ |
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448 | struct __db_reginfo_t; typedef struct __db_reginfo_t REGINFO; |
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449 | struct __db_txnhead; typedef struct __db_txnhead DB_TXNHEAD; |
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450 | struct __db_txnlist; typedef struct __db_txnlist DB_TXNLIST; |
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451 | struct __vrfy_childinfo; typedef struct __vrfy_childinfo VRFY_CHILDINFO; |
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452 | struct __vrfy_dbinfo; typedef struct __vrfy_dbinfo VRFY_DBINFO; |
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453 | struct __vrfy_pageinfo; typedef struct __vrfy_pageinfo VRFY_PAGEINFO; |
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454 | |
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455 | #if defined(__cplusplus) |
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456 | } |
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457 | #endif |
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458 | |
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459 | /******************************************************* |
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460 | * Remaining general DB includes. |
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461 | *******************************************************/ |
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462 | |
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463 | |
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464 | #include "dbinc/globals.h" |
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465 | #include "dbinc/debug.h" |
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466 | #include "dbinc/mutex.h" |
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467 | #include "dbinc/region.h" |
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468 | #include "dbinc_auto/mutex_ext.h" /* XXX: Include after region.h. */ |
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469 | #include "dbinc_auto/env_ext.h" |
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470 | #include "dbinc/os.h" |
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471 | #include "dbinc_auto/clib_ext.h" |
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472 | #include "dbinc_auto/common_ext.h" |
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473 | |
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474 | #endif /* !_DB_INTERNAL_H_ */ |
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