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79 lines
2.3 KiB
C
79 lines
2.3 KiB
C
/* -*- mode: C; c-basic-offset: 4 -*- */
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#ident "Copyright (c) 2007-8 Tokutek Inc. All rights reserved."
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#ident "The technology is licensed by the Massachusetts Institute of Technology, Rutgers State University of New Jersey, and the Research Foundation of State University of New York at Stony Brook under United States of America Serial No. 11/760379 and to the patents and/or patent applications resulting from it."
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#include "toku_portability.h"
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#include <errno.h>
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#include <assert.h>
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#include <string.h>
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#include <limits.h>
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#include <memory.h>
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#include <hashfun.h>
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#include "db_id.h"
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BOOL toku_db_id_equals(const toku_db_id* a, const toku_db_id* b) {
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assert(a && b);
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return (BOOL)
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(a == b ||
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(a->saved_hash == b->saved_hash &&
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memcmp(&a->id, &b->id, sizeof(b->id))==0 &&
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!strcmp(a->sub_database_name, b->sub_database_name)));
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}
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void toku_db_id_add_ref(toku_db_id* db_id) {
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assert(db_id);
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assert(db_id->ref_count > 0);
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db_id->ref_count++;
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}
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static void toku_db_id_close(toku_db_id** pdb_id) {
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toku_db_id* db_id = *pdb_id;
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toku_free(db_id->sub_database_name);
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toku_free(db_id);
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*pdb_id = NULL;
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}
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void toku_db_id_remove_ref(toku_db_id** pdb_id) {
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toku_db_id* db_id = *pdb_id;
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assert(db_id);
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assert(db_id->ref_count > 0);
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db_id->ref_count--;
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if (db_id->ref_count > 0) { return; }
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toku_db_id_close(pdb_id);
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}
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int toku_db_id_create(toku_db_id** pdbid, int fd,
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const char* sub_database_name) {
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int r = ENOSYS;
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assert(sub_database_name);
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toku_db_id* db_id = NULL;
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db_id = (toku_db_id *)toku_malloc(sizeof(*db_id));
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if (!db_id) { r = ENOMEM; goto cleanup; }
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memset(db_id, 0, sizeof(*db_id));
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r = toku_os_get_unique_file_id(fd, &db_id->id);
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if (r!=0) goto cleanup;
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db_id->sub_database_name = toku_strdup(sub_database_name);
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if (!db_id->sub_database_name) { r = ENOMEM; goto cleanup; }
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db_id->saved_hash = hash_key((unsigned char*)db_id->sub_database_name,
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strlen(db_id->sub_database_name));
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db_id->ref_count = 1;
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*pdbid = db_id;
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r = 0;
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cleanup:
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if (r != 0) {
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if (db_id != NULL) {
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if (db_id->sub_database_name) { toku_free(db_id->sub_database_name); }
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toku_free(db_id);
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}
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}
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return r;
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}
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