ISAR/libmdbx
3
0
Fork 0
mirror of https://github.com/isar/libmdbx.git synced 2025-10-18 22:09:03 +08:00
Code Issues Packages Projects Releases Wiki Activity

mdbx: rework MDBX_val.

Browse Source
This commit is contained in:
Leo Yuriev
2017-05-23 21:05:54 +03:00
parent ac8e987346
commit 8c18622592
10 changed files with 525 additions and 525 deletions
Download Patch File Download Diff File Expand all files Collapse all files

54
mdbx.h
View File

@@ -137,16 +137,14 @@ struct iovec {
#define HAVE_STRUCT_IOVEC
#endif /* HAVE_STRUCT_IOVEC */
typedef struct iovec MDB_val;
#define mv_size iov_len
#define mv_data iov_base
typedef struct iovec MDBX_val;
/* The maximum size of a data item.
* MDBX only store a 32 bit value for node sizes. */
#define MDBX_MAXDATASIZE INT32_MAX
/* A callback function used to compare two keys in a database */
typedef int(MDB_cmp_func)(const MDB_val *a, const MDB_val *b);
typedef int(MDB_cmp_func)(const MDBX_val *a, const MDBX_val *b);
/* Environment Flags */
/* no environment directory */
@@ -1079,8 +1077,8 @@ LIBMDBX_API int mdbx_drop(MDBX_txn *txn, MDB_dbi dbi, int del);
* possible errors are:
* - MDB_NOTFOUND - the key was not in the database.
* - MDBX_EINVAL - an invalid parameter was specified. */
LIBMDBX_API int mdbx_get(MDBX_txn *txn, MDB_dbi dbi, MDB_val *key,
MDB_val *data);
LIBMDBX_API int mdbx_get(MDBX_txn *txn, MDB_dbi dbi, MDBX_val *key,
MDBX_val *data);
/* Store items into a database.
*
@@ -1139,8 +1137,8 @@ LIBMDBX_API int mdbx_get(MDBX_txn *txn, MDB_dbi dbi, MDB_val *key,
* - MDB_TXN_FULL - the transaction has too many dirty pages.
* - MDBX_EACCES - an attempt was made to write in a read-only transaction.
* - MDBX_EINVAL - an invalid parameter was specified. */
LIBMDBX_API int mdbx_put(MDBX_txn *txn, MDB_dbi dbi, MDB_val *key,
MDB_val *data, unsigned flags);
LIBMDBX_API int mdbx_put(MDBX_txn *txn, MDB_dbi dbi, MDBX_val *key,
MDBX_val *data, unsigned flags);
/* Delete items from a database.
*
@@ -1162,8 +1160,8 @@ LIBMDBX_API int mdbx_put(MDBX_txn *txn, MDB_dbi dbi, MDB_val *key,
* possible errors are:
* - MDBX_EACCES - an attempt was made to write in a read-only transaction.
* - MDBX_EINVAL - an invalid parameter was specified. */
LIBMDBX_API int mdbx_del(MDBX_txn *txn, MDB_dbi dbi, MDB_val *key,
MDB_val *data);
LIBMDBX_API int mdbx_del(MDBX_txn *txn, MDB_dbi dbi, MDBX_val *key,
MDBX_val *data);
/* Create a cursor handle.
*
@@ -1238,8 +1236,8 @@ LIBMDBX_API MDB_dbi mdbx_cursor_dbi(MDB_cursor *cursor);
* possible errors are:
* - MDB_NOTFOUND - no matching key found.
* - MDBX_EINVAL - an invalid parameter was specified. */
LIBMDBX_API int mdbx_cursor_get(MDB_cursor *cursor, MDB_val *key, MDB_val *data,
MDB_cursor_op op);
LIBMDBX_API int mdbx_cursor_get(MDB_cursor *cursor, MDBX_val *key,
MDBX_val *data, MDB_cursor_op op);
/* Store by cursor.
*
@@ -1292,13 +1290,13 @@ LIBMDBX_API int mdbx_cursor_get(MDB_cursor *cursor, MDB_val *key, MDB_val *data,
* - MDB_MULTIPLE
* Store multiple contiguous data elements in a single request. This flag
* may only be specified if the database was opened with MDB_DUPFIXED.
* The data argument must be an array of two MDB_vals. The mv_size of the
* first MDB_val must be the size of a single data element. The mv_data
* of the first MDB_val must point to the beginning of the array of
* contiguous data elements. The mv_size of the second MDB_val must be
* The data argument must be an array of two MDBX_vals. The iov_len of the
* first MDBX_val must be the size of a single data element. The iov_base
* of the first MDBX_val must point to the beginning of the array of
* contiguous data elements. The iov_len of the second MDBX_val must be
* the count of the number of data elements to store. On return this
* field will be set to the count of the number of elements actually
* written. The mv_data of the second MDB_val is unused.
* written. The iov_base of the second MDBX_val is unused.
*
* Returns A non-zero error value on failure and 0 on success, some
* possible errors are:
@@ -1307,8 +1305,8 @@ LIBMDBX_API int mdbx_cursor_get(MDB_cursor *cursor, MDB_val *key, MDB_val *data,
* - MDB_TXN_FULL - the transaction has too many dirty pages.
* - MDBX_EACCES - an attempt was made to write in a read-only transaction.
* - MDBX_EINVAL - an invalid parameter was specified. */
LIBMDBX_API int mdbx_cursor_put(MDB_cursor *cursor, MDB_val *key, MDB_val *data,
unsigned flags);
LIBMDBX_API int mdbx_cursor_put(MDB_cursor *cursor, MDBX_val *key,
MDBX_val *data, unsigned flags);
/* Delete current key/data pair
*
@@ -1353,8 +1351,8 @@ LIBMDBX_API int mdbx_cursor_count(MDB_cursor *cursor, uint64_t *countp);
* [in] b The second item to compare
*
* Returns < 0 if a < b, 0 if a == b, > 0 if a > b */
LIBMDBX_API int mdbx_cmp(MDBX_txn *txn, MDB_dbi dbi, const MDB_val *a,
const MDB_val *b);
LIBMDBX_API int mdbx_cmp(MDBX_txn *txn, MDB_dbi dbi, const MDBX_val *a,
const MDBX_val *b);
/* Compare two data items according to a particular database.
*
@@ -1367,8 +1365,8 @@ LIBMDBX_API int mdbx_cmp(MDBX_txn *txn, MDB_dbi dbi, const MDB_val *a,
* [in] b The second item to compare
*
* Returns < 0 if a < b, 0 if a == b, > 0 if a > b */
LIBMDBX_API int mdbx_dcmp(MDBX_txn *txn, MDB_dbi dbi, const MDB_val *a,
const MDB_val *b);
LIBMDBX_API int mdbx_dcmp(MDBX_txn *txn, MDB_dbi dbi, const MDBX_val *a,
const MDBX_val *b);
/* A callback function used to print a message from the library.
*
@@ -1395,7 +1393,7 @@ LIBMDBX_API int mdbx_reader_list(MDB_env *env, MDB_msg_func *func, void *ctx);
* Returns 0 on success, non-zero on failure. */
LIBMDBX_API int mdbx_reader_check(MDB_env *env, int *dead);
LIBMDBX_API char *mdbx_dkey(const MDB_val *key, char *const buf,
LIBMDBX_API char *mdbx_dkey(const MDBX_val *key, char *const buf,
const size_t bufsize);
LIBMDBX_API int mdbx_env_close_ex(MDB_env *env, int dont_sync);
@@ -1509,15 +1507,15 @@ LIBMDBX_API int mdbx_cursor_on_first(MDB_cursor *mc);
/* Returns: MDBX_RESULT_TRUE, MDBX_RESULT_FALSE or Error code. */
LIBMDBX_API int mdbx_cursor_on_last(MDB_cursor *mc);
LIBMDBX_API int mdbx_replace(MDBX_txn *txn, MDB_dbi dbi, MDB_val *key,
MDB_val *new_data, MDB_val *old_data,
LIBMDBX_API int mdbx_replace(MDBX_txn *txn, MDB_dbi dbi, MDBX_val *key,
MDBX_val *new_data, MDBX_val *old_data,
unsigned flags);
/* Same as mdbx_get(), but:
* 1) if values_count is not NULL, then returns the count
* of multi-values/duplicates for a given key.
* 2) updates the key for pointing to the actual key's data inside DB. */
LIBMDBX_API int mdbx_get_ex(MDBX_txn *txn, MDB_dbi dbi, MDB_val *key,
MDB_val *data, int *values_count);
LIBMDBX_API int mdbx_get_ex(MDBX_txn *txn, MDB_dbi dbi, MDBX_val *key,
MDBX_val *data, int *values_count);
LIBMDBX_API int mdbx_is_dirty(const MDBX_txn *txn, const void *ptr);