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mdbx: dynamic mapsize/geometry and API (mostly done).

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Change-Id: Ifb768ff3207cae1755c53c211a3ae552c6455e12
This commit is contained in:
Leo Yuriev
2017-06-21 01:34:56 +03:00
parent 45defdc170
commit 9a2fff91f3
9 changed files with 1133 additions and 502 deletions
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26
mdbx.h
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@@ -72,6 +72,7 @@ typedef unsigned mode_t;
typedef HANDLE mdbx_filehandle_t;
typedef DWORD mdbx_pid_t;
typedef DWORD mdbx_tid_t;
typedef SSIZE_T ssize_t;
#define MDBX_ENODATA ERROR_HANDLE_EOF
#define MDBX_EINVAL ERROR_INVALID_PARAMETER
#define MDBX_EACCESS ERROR_ACCESS_DENIED
@@ -437,16 +438,24 @@ typedef struct MDBX_stat {
/* Information about the environment */
typedef struct MDBX_envinfo {
void *me_mapaddr; /* Address of map, if fixed */
uint64_t me_mapsize; /* Size of the data memory map */
uint64_t me_recent_pgno; /* ID of the last used page */
uint64_t me_recent_txnid; /* ID of the last committed transaction */
uint32_t me_maxreaders; /* max reader slots in the environment */
uint32_t me_numreaders; /* max reader slots used in the environment */
struct {
uint64_t lower; /* lower limit for datafile size */
uint64_t upper; /* upper limit for datafile size */
uint64_t current; /* current datafile size */
uint64_t shrink; /* shrink theshold for datafile */
uint64_t grow; /* growth step for datafile */
} me_geo;
uint64_t me_mapsize; /* Size of the data memory map */
uint64_t me_last_pgno; /* ID of the last used page */
uint64_t me_recent_txnid; /* ID of the last committed transaction */
uint64_t me_latter_reader_txnid; /* ID of the last reader transaction */
uint64_t me_meta0_txnid, me_meta0_sign;
uint64_t me_meta1_txnid, me_meta1_sign;
uint64_t me_meta2_txnid, me_meta2_sign;
uint32_t me_maxreaders; /* max reader slots in the environment */
uint32_t me_numreaders; /* max reader slots used in the environment */
uint32_t me_dxb_pagesize; /* database pagesize */
uint32_t me_sys_pagesize; /* system pagesize */
} MDBX_envinfo;
/* Return a string describing a given error code.
@@ -800,6 +809,11 @@ LIBMDBX_API int mdbx_env_get_fd(MDBX_env *env, mdbx_filehandle_t *fd);
* - MDBX_EINVAL - an invalid parameter was specified,
* or the environment has an active write transaction. */
LIBMDBX_API int mdbx_env_set_mapsize(MDBX_env *env, size_t size);
LIBMDBX_API int mdbx_env_set_geometry(MDBX_env *env, ssize_t size_lower,
ssize_t size_now, ssize_t size_upper,
ssize_t growth_step,
ssize_t shrink_threshold,
ssize_t pagesize);
/* Set the maximum number of threads/reader slots for the environment.
*