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mdbx: rework max key-length and limit API.

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Change-Id: I3d783f69d4ea438d8a8a0505fa9163715fbdcf9c
This commit is contained in:
Leonid Yuriev
2019-11-24 19:04:21 +03:00
parent 9bd88d80d0
commit d80654fa07
8 changed files with 462 additions and 244 deletions
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25
mdbx.h
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@@ -2084,19 +2084,21 @@ __inline intptr_t mdbx_limits_pgsize_min(void) { return MDBX_MIN_PAGESIZE; }
__inline intptr_t mdbx_limits_pgsize_max(void) { return MDBX_MAX_PAGESIZE; }
/* Returns minimal database size in bytes for given page size,
* or the negative error code. */
* or -1 if pagesize is invalid. */
LIBMDBX_API intptr_t mdbx_limits_dbsize_min(intptr_t pagesize);
/* Returns maximal database size in bytes for given page size,
* or the negative error code. */
* or -1 if pagesize is invalid. */
LIBMDBX_API intptr_t mdbx_limits_dbsize_max(intptr_t pagesize);
/* Returns maximal key size in bytes for given page size,
* or the negative error code. */
LIBMDBX_API intptr_t mdbx_limits_keysize_max(intptr_t pagesize);
/* Returns maximal key and data size in bytes for given page size
* and database flags (see mdbx_dbi_open_ex() description),
* or -1 if pagesize is invalid. */
LIBMDBX_API intptr_t mdbx_limits_keysize_max(intptr_t pagesize, unsigned flags);
LIBMDBX_API intptr_t mdbx_limits_valsize_max(intptr_t pagesize, unsigned flags);
/* Returns maximal write transaction size (i.e. limit for summary volume of
* dirty pages) in bytes for given page size, or the negative error code. */
* dirty pages) in bytes for given page size, or -1 if pagesize is invalid. */
LIBMDBX_API intptr_t mdbx_limits_txnsize_max(intptr_t pagesize);
/* Set the maximum number of threads/reader slots for the environment.
@@ -2150,11 +2152,16 @@ LIBMDBX_API int mdbx_env_get_maxreaders(MDBX_env *env, unsigned *readers);
* - MDBX_EPERM = the environment is already open. */
LIBMDBX_API int mdbx_env_set_maxdbs(MDBX_env *env, MDBX_dbi dbs);
/* Get the maximum size of keys and MDBX_DUPSORT data we can write.
/* Get the maximum size of keys and data we can write.
*
* [in] env An environment handle returned by mdbx_env_create().
* [in] env An environment handle returned by mdbx_env_create().
* [in] flags Database options (MDBX_DUPSORT, MDBX_INTEGERKEY ans so on),
* see mdbx_dbi_open_ex() description.
*
* Returns The maximum size of a key we can write. */
* Returns The maximum size of a key we can write,
* or -1 if something is wrong. */
LIBMDBX_API int mdbx_env_get_maxkeysize_ex(MDBX_env *env, unsigned flags);
LIBMDBX_API int mdbx_env_get_maxvalsize_ex(MDBX_env *env, unsigned flags);
LIBMDBX_API int mdbx_env_get_maxkeysize(MDBX_env *env);
/* Set application information associated with the MDBX_env.