mtest6.c 3.9 KB

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  1. /* mtest6.c - memory-mapped database tester/toy */
  2. /*
  3. * Copyright 2011-2021 Howard Chu, Symas Corp.
  4. * All rights reserved.
  5. *
  6. * Redistribution and use in source and binary forms, with or without
  7. * modification, are permitted only as authorized by the OpenLDAP
  8. * Public License.
  9. *
  10. * A copy of this license is available in the file LICENSE in the
  11. * top-level directory of the distribution or, alternatively, at
  12. * <http://www.OpenLDAP.org/license.html>.
  13. */
  14. /* Tests for DB splits and merges */
  15. #include <stdio.h>
  16. #include <stdlib.h>
  17. #include <string.h>
  18. #include <time.h>
  19. #include "lmdb.h"
  20. #define E(expr) CHECK((rc = (expr)) == MDB_SUCCESS, #expr)
  21. #define RES(err, expr) ((rc = expr) == (err) || (CHECK(!rc, #expr), 0))
  22. #define CHECK(test, msg) ((test) ? (void)0 : ((void)fprintf(stderr, \
  23. "%s:%d: %s: %s\n", __FILE__, __LINE__, msg, mdb_strerror(rc)), abort()))
  24. char dkbuf[1024];
  25. int main(int argc,char * argv[])
  26. {
  27. int i = 0, j = 0, rc;
  28. MDB_env *env;
  29. MDB_dbi dbi;
  30. MDB_val key, data, sdata;
  31. MDB_txn *txn;
  32. MDB_stat mst;
  33. MDB_cursor *cursor;
  34. int count;
  35. int *values;
  36. long kval;
  37. char *sval;
  38. srand(time(NULL));
  39. E(mdb_env_create(&env));
  40. E(mdb_env_set_mapsize(env, 10485760));
  41. E(mdb_env_set_maxdbs(env, 4));
  42. E(mdb_env_open(env, "./testdb", MDB_FIXEDMAP|MDB_NOSYNC, 0664));
  43. E(mdb_txn_begin(env, NULL, 0, &txn));
  44. E(mdb_dbi_open(txn, "id6", MDB_CREATE|MDB_INTEGERKEY, &dbi));
  45. E(mdb_cursor_open(txn, dbi, &cursor));
  46. E(mdb_stat(txn, dbi, &mst));
  47. sval = calloc(1, mst.ms_psize / 4);
  48. key.mv_size = sizeof(long);
  49. key.mv_data = &kval;
  50. sdata.mv_size = mst.ms_psize / 4 - 30;
  51. sdata.mv_data = sval;
  52. printf("Adding 12 values, should yield 3 splits\n");
  53. for (i=0;i<12;i++) {
  54. kval = i*5;
  55. sprintf(sval, "%08x", kval);
  56. data = sdata;
  57. (void)RES(MDB_KEYEXIST, mdb_cursor_put(cursor, &key, &data, MDB_NOOVERWRITE));
  58. }
  59. printf("Adding 12 more values, should yield 3 splits\n");
  60. for (i=0;i<12;i++) {
  61. kval = i*5+4;
  62. sprintf(sval, "%08x", kval);
  63. data = sdata;
  64. (void)RES(MDB_KEYEXIST, mdb_cursor_put(cursor, &key, &data, MDB_NOOVERWRITE));
  65. }
  66. printf("Adding 12 more values, should yield 3 splits\n");
  67. for (i=0;i<12;i++) {
  68. kval = i*5+1;
  69. sprintf(sval, "%08x", kval);
  70. data = sdata;
  71. (void)RES(MDB_KEYEXIST, mdb_cursor_put(cursor, &key, &data, MDB_NOOVERWRITE));
  72. }
  73. E(mdb_cursor_get(cursor, &key, &data, MDB_FIRST));
  74. do {
  75. printf("key: %p %s, data: %p %.*s\n",
  76. key.mv_data, mdb_dkey(&key, dkbuf),
  77. data.mv_data, (int) data.mv_size, (char *) data.mv_data);
  78. } while ((rc = mdb_cursor_get(cursor, &key, &data, MDB_NEXT)) == 0);
  79. CHECK(rc == MDB_NOTFOUND, "mdb_cursor_get");
  80. mdb_cursor_close(cursor);
  81. mdb_txn_commit(txn);
  82. #if 0
  83. j=0;
  84. for (i= count - 1; i > -1; i-= (rand()%5)) {
  85. j++;
  86. txn=NULL;
  87. E(mdb_txn_begin(env, NULL, 0, &txn));
  88. sprintf(kval, "%03x", values[i & ~0x0f]);
  89. sprintf(sval, "%03x %d foo bar", values[i], values[i]);
  90. key.mv_size = sizeof(int);
  91. key.mv_data = kval;
  92. data.mv_size = sizeof(sval);
  93. data.mv_data = sval;
  94. if (RES(MDB_NOTFOUND, mdb_del(txn, dbi, &key, &data))) {
  95. j--;
  96. mdb_txn_abort(txn);
  97. } else {
  98. E(mdb_txn_commit(txn));
  99. }
  100. }
  101. free(values);
  102. printf("Deleted %d values\n", j);
  103. E(mdb_env_stat(env, &mst));
  104. E(mdb_txn_begin(env, NULL, MDB_RDONLY, &txn));
  105. E(mdb_cursor_open(txn, dbi, &cursor));
  106. printf("Cursor next\n");
  107. while ((rc = mdb_cursor_get(cursor, &key, &data, MDB_NEXT)) == 0) {
  108. printf("key: %.*s, data: %.*s\n",
  109. (int) key.mv_size, (char *) key.mv_data,
  110. (int) data.mv_size, (char *) data.mv_data);
  111. }
  112. CHECK(rc == MDB_NOTFOUND, "mdb_cursor_get");
  113. printf("Cursor prev\n");
  114. while ((rc = mdb_cursor_get(cursor, &key, &data, MDB_PREV)) == 0) {
  115. printf("key: %.*s, data: %.*s\n",
  116. (int) key.mv_size, (char *) key.mv_data,
  117. (int) data.mv_size, (char *) data.mv_data);
  118. }
  119. CHECK(rc == MDB_NOTFOUND, "mdb_cursor_get");
  120. mdb_cursor_close(cursor);
  121. mdb_txn_abort(txn);
  122. mdb_dbi_close(env, dbi);
  123. #endif
  124. mdb_env_close(env);
  125. return 0;
  126. }