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mdbx: rework mmap-functions for osal.

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- add 'length' and 'current' fields to mmap-object;
 - drop mdbx_mremap();
 - do remap on-demand inside mdbx_mresize();
 - add mdbx_mapresize() which re-creates Valgrind's region.
 - call resize on txn-begin.

Change-Id: I82780f92c4947804e3f14fb7cb71ee655382f9bb
This commit is contained in:
Leo Yuriev
2017-07-12 21:13:17 +03:00
parent 700ec68d06
commit 17e8429a29
9 changed files with 290 additions and 244 deletions
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24
mdbx.h
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@@ -448,18 +448,18 @@ typedef struct MDBX_envinfo {
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 */
} mi_geo;
uint64_t mi_mapsize; /* Size of the data memory map */
uint64_t mi_last_pgno; /* ID of the last used page */
uint64_t mi_recent_txnid; /* ID of the last committed transaction */
uint64_t mi_latter_reader_txnid; /* ID of the last reader transaction */
uint64_t mi_meta0_txnid, mi_meta0_sign;
uint64_t mi_meta1_txnid, mi_meta1_sign;
uint64_t mi_meta2_txnid, mi_meta2_sign;
uint32_t mi_maxreaders; /* max reader slots in the environment */
uint32_t mi_numreaders; /* max reader slots used in the environment */
uint32_t mi_dxb_pagesize; /* database pagesize */
uint32_t mi_sys_pagesize; /* system pagesize */
} MDBX_envinfo;
/* Return a string describing a given error code.