mtest2.c 3.4 KB

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  1. /* mtest2.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. /* Just like mtest.c, but using a subDB instead of the main DB */
  15. #include <stdio.h>
  16. #include <stdlib.h>
  17. #include <time.h>
  18. #include "lmdb.h"
  19. #define E(expr) CHECK((rc = (expr)) == MDB_SUCCESS, #expr)
  20. #define RES(err, expr) ((rc = expr) == (err) || (CHECK(!rc, #expr), 0))
  21. #define CHECK(test, msg) ((test) ? (void)0 : ((void)fprintf(stderr, \
  22. "%s:%d: %s: %s\n", __FILE__, __LINE__, msg, mdb_strerror(rc)), abort()))
  23. int main(int argc,char * argv[])
  24. {
  25. int i = 0, j = 0, rc;
  26. MDB_env *env;
  27. MDB_dbi dbi;
  28. MDB_val key, data;
  29. MDB_txn *txn;
  30. MDB_stat mst;
  31. MDB_cursor *cursor;
  32. int count;
  33. int *values;
  34. char sval[32] = "";
  35. srand(time(NULL));
  36. count = (rand()%384) + 64;
  37. values = (int *)malloc(count*sizeof(int));
  38. for(i = 0;i<count;i++) {
  39. values[i] = rand()%1024;
  40. }
  41. E(mdb_env_create(&env));
  42. E(mdb_env_set_maxreaders(env, 1));
  43. E(mdb_env_set_mapsize(env, 10485760));
  44. E(mdb_env_set_maxdbs(env, 4));
  45. E(mdb_env_open(env, "./testdb", MDB_FIXEDMAP|MDB_NOSYNC, 0664));
  46. E(mdb_txn_begin(env, NULL, 0, &txn));
  47. E(mdb_dbi_open(txn, "id1", MDB_CREATE, &dbi));
  48. key.mv_size = sizeof(int);
  49. key.mv_data = sval;
  50. printf("Adding %d values\n", count);
  51. for (i=0;i<count;i++) {
  52. sprintf(sval, "%03x %d foo bar", values[i], values[i]);
  53. data.mv_size = sizeof(sval);
  54. data.mv_data = sval;
  55. if (RES(MDB_KEYEXIST, mdb_put(txn, dbi, &key, &data, MDB_NOOVERWRITE)))
  56. j++;
  57. }
  58. if (j) printf("%d duplicates skipped\n", j);
  59. E(mdb_txn_commit(txn));
  60. E(mdb_env_stat(env, &mst));
  61. E(mdb_txn_begin(env, NULL, MDB_RDONLY, &txn));
  62. E(mdb_cursor_open(txn, dbi, &cursor));
  63. while ((rc = mdb_cursor_get(cursor, &key, &data, MDB_NEXT)) == 0) {
  64. printf("key: %p %.*s, data: %p %.*s\n",
  65. key.mv_data, (int) key.mv_size, (char *) key.mv_data,
  66. data.mv_data, (int) data.mv_size, (char *) data.mv_data);
  67. }
  68. CHECK(rc == MDB_NOTFOUND, "mdb_cursor_get");
  69. mdb_cursor_close(cursor);
  70. mdb_txn_abort(txn);
  71. j=0;
  72. key.mv_data = sval;
  73. for (i= count - 1; i > -1; i-= (rand()%5)) {
  74. j++;
  75. txn=NULL;
  76. E(mdb_txn_begin(env, NULL, 0, &txn));
  77. sprintf(sval, "%03x ", values[i]);
  78. if (RES(MDB_NOTFOUND, mdb_del(txn, dbi, &key, NULL))) {
  79. j--;
  80. mdb_txn_abort(txn);
  81. } else {
  82. E(mdb_txn_commit(txn));
  83. }
  84. }
  85. free(values);
  86. printf("Deleted %d values\n", j);
  87. E(mdb_env_stat(env, &mst));
  88. E(mdb_txn_begin(env, NULL, MDB_RDONLY, &txn));
  89. E(mdb_cursor_open(txn, dbi, &cursor));
  90. printf("Cursor next\n");
  91. while ((rc = mdb_cursor_get(cursor, &key, &data, MDB_NEXT)) == 0) {
  92. printf("key: %.*s, data: %.*s\n",
  93. (int) key.mv_size, (char *) key.mv_data,
  94. (int) data.mv_size, (char *) data.mv_data);
  95. }
  96. CHECK(rc == MDB_NOTFOUND, "mdb_cursor_get");
  97. printf("Cursor prev\n");
  98. while ((rc = mdb_cursor_get(cursor, &key, &data, MDB_PREV)) == 0) {
  99. printf("key: %.*s, data: %.*s\n",
  100. (int) key.mv_size, (char *) key.mv_data,
  101. (int) data.mv_size, (char *) data.mv_data);
  102. }
  103. CHECK(rc == MDB_NOTFOUND, "mdb_cursor_get");
  104. mdb_cursor_close(cursor);
  105. mdb_txn_abort(txn);
  106. mdb_dbi_close(env, dbi);
  107. mdb_env_close(env);
  108. return 0;
  109. }