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mdbx: rename internal flags & fields for clarity.

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Change-Id: I79d6d8e88b0b4c30cbb8a464ca17f07dc2ab44c6
This commit is contained in:
Leonid Yuriev
2020-07-05 15:22:41 +03:00
parent 0fb127b935
commit 5dbb0b4cfe
3 changed files with 153 additions and 124 deletions
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64
src/internals.h
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@@ -716,6 +716,9 @@ struct MDBX_txn {
#define MDBX_TXN_BEGIN_FLAGS \
(MDBX_NOMETASYNC | MDBX_SAFE_NOSYNC | MDBX_MAPASYNC | MDBX_RDONLY | \
MDBX_TRYTXN)
/* Additional flag for mdbx_sync_locked() */
#define MDBX_SHRINK_ALLOWED UINT32_C(0x40000000)
/* internal txn flags */
#define MDBX_TXN_FINISHED 0x01 /* txn is finished or never began */
#define MDBX_TXN_ERROR 0x02 /* txn is unusable after an error */
@@ -725,6 +728,16 @@ struct MDBX_txn {
/* most operations on the txn are currently illegal */
#define MDBX_TXN_BLOCKED \
(MDBX_TXN_FINISHED | MDBX_TXN_ERROR | MDBX_TXN_HAS_CHILD)
#define TXN_FLAGS \
(MDBX_TXN_FINISHED | MDBX_TXN_ERROR | MDBX_TXN_DIRTY | MDBX_TXN_SPILLS | \
MDBX_TXN_HAS_CHILD)
#if (TXN_FLAGS & MDBX_TXN_BEGIN_FLAGS) || \
((MDBX_TXN_BEGIN_FLAGS | TXN_FLAGS) & MDBX_SHRINK_ALLOWED)
#error "Opps, some flags overlapped or wrong"
#endif
unsigned mt_flags;
/* The ID of this transaction. IDs are integers incrementing from 1.
* Only committed write transactions increment the ID. If a transaction
@@ -740,17 +753,17 @@ struct MDBX_txn {
/* In write txns, array of cursors for each DB */
MDBX_cursor **mt_cursors;
/* Transaction DB Flags */
#define DB_DIRTY MDBX_TBL_DIRTY /* DB was written in this txn */
#define DB_STALE MDBX_TBL_STALE /* Named-DB record is older than txnID */
#define DB_FRESH MDBX_TBL_FRESH /* Named-DB handle opened in this txn */
#define DB_CREAT MDBX_TBL_CREAT /* Named-DB handle created in this txn */
#define DB_VALID 0x10 /* DB handle is valid, see also MDBX_VALID */
#define DB_USRVALID 0x20 /* As DB_VALID, but not set for FREE_DBI */
#define DB_DUPDATA 0x40 /* DB is MDBX_DUPSORT data */
#define DB_AUDITED 0x80 /* Internal flag for accounting during audit */
/* Transaction DBI Flags */
#define DBI_DIRTY MDBX_DBI_DIRTY /* DB was written in this txn */
#define DBI_STALE MDBX_DBI_STALE /* Named-DB record is older than txnID */
#define DBI_FRESH MDBX_DBI_FRESH /* Named-DB handle opened in this txn */
#define DBI_CREAT MDBX_DBI_CREAT /* Named-DB handle created in this txn */
#define DBI_VALID 0x10 /* DB handle is valid, see also DB_VALID */
#define DBI_USRVALID 0x20 /* As DB_VALID, but not set for FREE_DBI */
#define DBI_DUPDATA 0x40 /* DB is MDBX_DUPSORT data */
#define DBI_AUDITED 0x80 /* Internal flag for accounting during audit */
/* Array of flags for each DB */
uint8_t *mt_dbstate;
uint8_t *mt_dbistate;
/* Number of DB records in use, or 0 when the txn is finished.
* This number only ever increments until the txn finishes; we
* don't decrement it when individual DB handles are closed. */
@@ -833,8 +846,8 @@ struct MDBX_cursor {
MDBX_db *mc_db;
/* The database auxiliary record for this cursor */
MDBX_dbx *mc_dbx;
/* The mt_dbstate for this database */
uint8_t *mc_dbstate;
/* The mt_dbistate for this database */
uint8_t *mc_dbistate;
unsigned mc_snum; /* number of pushed pages */
unsigned mc_top; /* index of top page, normally mc_snum-1 */
@@ -869,8 +882,8 @@ typedef struct MDBX_xcursor {
MDBX_db mx_db;
/* The auxiliary DB record for this Dup DB */
MDBX_dbx mx_dbx;
/* The mt_dbstate for this Dup DB */
uint8_t mx_dbstate;
/* The mt_dbistate for this Dup DB */
uint8_t mx_dbistate;
} MDBX_xcursor;
typedef struct MDBX_cursor_couple {
@@ -884,12 +897,11 @@ struct MDBX_env {
uint32_t me_signature;
/* Failed to update the meta page. Probably an I/O error. */
#define MDBX_FATAL_ERROR UINT32_C(0x80000000)
/* Additional flag for mdbx_sync_locked() */
#define MDBX_SHRINK_ALLOWED UINT32_C(0x40000000)
/* Some fields are initialized. */
#define MDBX_ENV_ACTIVE UINT32_C(0x20000000)
/* me_txkey is set */
#define MDBX_ENV_TXKEY UINT32_C(0x10000000)
#define ENV_INTERNAL_FLAGS (MDBX_FATAL_ERROR | MDBX_ENV_ACTIVE | MDBX_ENV_TXKEY)
uint32_t me_flags;
mdbx_mmap_t me_dxb_mmap; /* The main data file */
#define me_map me_dxb_mmap.dxb
@@ -1287,12 +1299,22 @@ typedef struct MDBX_node {
uint8_t mn_data[/* C99 */]; /* key and data are appended here */
} MDBX_node;
#define MDBX_VALID 0x8000 /* DB handle is valid, for me_dbflags */
#define PERSISTENT_FLAGS (0xffff & ~(MDBX_VALID | MDBX_NOSUBDIR))
/* mdbx_dbi_open() flags */
#define VALID_FLAGS \
#define DB_PERSISTENT_FLAGS \
(MDBX_REVERSEKEY | MDBX_DUPSORT | MDBX_INTEGERKEY | MDBX_DUPFIXED | \
MDBX_INTEGERDUP | MDBX_REVERSEDUP | MDBX_CREATE | MDBX_ACCEDE)
MDBX_INTEGERDUP | MDBX_REVERSEDUP)
/* mdbx_dbi_open() flags */
#define DB_USABLE_FLAGS (DB_PERSISTENT_FLAGS | MDBX_CREATE | MDBX_ACCEDE)
#define DB_VALID 0x8000 /* DB handle is valid, for me_dbflags */
#define DB_INTERNAL_FLAGS DB_VALID
#if DB_INTERNAL_FLAGS & DB_USABLE_FLAGS
#error "Opps, some flags overlapped or wrong"
#endif
#if DB_PERSISTENT_FLAGS & ~DB_USABLE_FLAGS
#error "Opps, some flags overlapped or wrong"
#endif
/* max number of pages to commit in one writev() call */
#define MDBX_COMMIT_PAGES 64