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mdbx: minor reorder/shrink transaction fields.

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This commit is contained in:
Leonid Yuriev 2021-05-10 15:59:50 +03:00
parent 0d100a898f
commit 74ea79ac1b
1 changed files with 11 additions and 10 deletions
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21
src/internals.h
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@ -921,15 +921,7 @@ typedef struct MDBX_dbx {
* Every operation requires a transaction handle. */
struct MDBX_txn {
#define MDBX_MT_SIGNATURE UINT32_C(0x93D53A31)
size_t mt_signature;
MDBX_txn *mt_parent; /* parent of a nested txn */
/* Nested txn under this txn, set together with flag MDBX_TXN_HAS_CHILD */
MDBX_txn *mt_child;
MDBX_geo mt_geo;
/* next unallocated page */
#define mt_next_pgno mt_geo.next
/* corresponding to the current size of datafile */
#define mt_end_pgno mt_geo.now
uint32_t mt_signature;
/* Transaction Flags */
/* mdbx_txn_begin() flags */
@ -958,8 +950,17 @@ struct MDBX_txn {
MDBX_SHRINK_ALLOWED)
#error "Oops, some flags overlapped or wrong"
#endif
uint32_t mt_flags;
MDBX_txn *mt_parent; /* parent of a nested txn */
/* Nested txn under this txn, set together with flag MDBX_TXN_HAS_CHILD */
MDBX_txn *mt_child;
MDBX_geo mt_geo;
/* next unallocated page */
#define mt_next_pgno mt_geo.next
/* corresponding to the current size of datafile */
#define mt_end_pgno mt_geo.now
unsigned mt_flags;
/* The ID of this transaction. IDs are integers incrementing from 1.
* Only committed write transactions increment the ID. If a transaction
* aborts, the ID may be re-used by the next writer. */