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mdbx: rearrange MDBX_env ro/rw fields.
Change-Id: I055aa6ad592930be2d5d676977fbaa84149472ce
This commit is contained in:
Leonid Yuriev
parent
8b95be91db
commit
13a784eeed
@ -1085,6 +1085,7 @@ typedef struct MDBX_cursor_couple {
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/* The database environment. */
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struct MDBX_env {
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/* ----------------------------------------------------- mostly static part */
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#define MDBX_ME_SIGNATURE UINT32_C(0x9A899641)
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MDBX_atomic_uint32_t me_signature;
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/* Failed to update the meta page. Probably an I/O error. */
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@ -1110,36 +1111,18 @@ struct MDBX_env {
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uint8_t me_psize2log; /* log2 of DB page size */
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int8_t me_stuck_meta; /* recovery-only: target meta page or less that zero */
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unsigned me_os_psize; /* OS page size, from mdbx_syspagesize() */
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unsigned me_maxreaders; /* size of the reader table */
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mdbx_fastmutex_t me_dbi_lock;
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MDBX_dbi me_numdbs; /* number of DBs opened */
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unsigned me_maxreaders; /* size of the reader table */
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MDBX_dbi me_maxdbs; /* size of the DB table */
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uint32_t me_pid; /* process ID of this env */
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mdbx_thread_key_t me_txkey; /* thread-key for readers */
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char *me_pathname; /* path to the DB files */
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void *me_pbuf; /* scratch area for DUPSORT put() */
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MDBX_txn *me_txn; /* current write transaction */
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MDBX_txn *me_txn0; /* prealloc'd write transaction */
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/* write-txn lock */
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#if MDBX_LOCKING == MDBX_LOCKING_SYSV
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union {
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key_t key;
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int semid;
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} me_sysv_ipc;
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#endif /* MDBX_LOCKING == MDBX_LOCKING_SYSV */
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#if MDBX_LOCKING > 0
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mdbx_ipclock_t *me_wlock;
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#endif /* MDBX_LOCKING > 0 */
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MDBX_dbx *me_dbxs; /* array of static DB info */
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uint16_t *me_dbflags; /* array of flags from MDBX_db.md_flags */
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unsigned *me_dbiseqs; /* array of dbi sequence numbers */
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atomic_txnid_t *me_oldest; /* ID of oldest reader last time we looked */
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MDBX_page *me_dp_reserve; /* list of malloc'ed blocks for re-use */
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/* PNL of pages that became unused in a write txn */
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MDBX_PNL me_retired_pages;
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/* Number of freelist items that can fit in a single overflow page */
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unsigned me_maxgc_ov1page;
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uint32_t me_live_reader; /* have liveness lock in reader table */
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@ -1152,7 +1135,6 @@ struct MDBX_env {
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pgno_t *me_readahead_anchor;
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MDBX_atomic_uint32_t *me_meta_sync_txnid;
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MDBX_hsr_func *me_hsr_callback; /* Callback for kicking laggard readers */
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unsigned me_dp_reserve_len;
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struct {
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unsigned dp_reserve_limit;
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unsigned rp_augment_limit;
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@ -1163,6 +1145,51 @@ struct MDBX_env {
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uint8_t spill_min_denominator;
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uint8_t spill_parent4child_denominator;
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} me_options;
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/* struct me_dbgeo used for accepting db-geo params from user for the new
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* database creation, i.e. when mdbx_env_set_geometry() was called before
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* mdbx_env_open(). */
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struct {
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size_t lower; /* minimal size of datafile */
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size_t upper; /* maximal size of datafile */
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size_t now; /* current size of datafile */
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size_t grow; /* step to grow datafile */
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size_t shrink; /* threshold to shrink datafile */
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} me_dbgeo;
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#if MDBX_LOCKING == MDBX_LOCKING_SYSV
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union {
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key_t key;
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int semid;
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} me_sysv_ipc;
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#endif /* MDBX_LOCKING == MDBX_LOCKING_SYSV */
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MDBX_env *me_lcklist_next;
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/* --------------------------------------------------- mostly volatile part */
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MDBX_txn *me_txn; /* current write transaction */
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mdbx_fastmutex_t me_dbi_lock;
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MDBX_dbi me_numdbs; /* number of DBs opened */
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MDBX_page *me_dp_reserve; /* list of malloc'ed blocks for re-use */
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unsigned me_dp_reserve_len;
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/* PNL of pages that became unused in a write txn */
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MDBX_PNL me_retired_pages;
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/* write-txn lock */
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#if MDBX_LOCKING > 0
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mdbx_ipclock_t *me_wlock;
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#endif /* MDBX_LOCKING > 0 */
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#if defined(_WIN32) || defined(_WIN64)
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MDBX_srwlock me_remap_guard;
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/* Workaround for LockFileEx and WriteFile multithread bug */
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CRITICAL_SECTION me_windowsbug_lock;
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#else
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mdbx_fastmutex_t me_remap_guard;
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#endif
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struct {
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#if MDBX_LOCKING > 0
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mdbx_ipclock_t wlock;
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@ -1176,6 +1203,9 @@ struct MDBX_env {
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pgno_t readahead_anchor;
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MDBX_atomic_uint32_t meta_sync_txnid;
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} me_lckless_stub;
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/* -------------------------------------------------------------- debugging */
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#if MDBX_DEBUG
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MDBX_assert_func *me_assert_func; /* Callback for assertion failures */
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#endif
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@ -1185,26 +1215,6 @@ struct MDBX_env {
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#if defined(MDBX_USE_VALGRIND) || defined(__SANITIZE_ADDRESS__)
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pgno_t me_poison_edge;
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#endif /* MDBX_USE_VALGRIND || __SANITIZE_ADDRESS__ */
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MDBX_env *me_lcklist_next;
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/* struct me_dbgeo used for accepting db-geo params from user for the new
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* database creation, i.e. when mdbx_env_set_geometry() was called before
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* mdbx_env_open(). */
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struct {
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size_t lower; /* minimal size of datafile */
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size_t upper; /* maximal size of datafile */
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size_t now; /* current size of datafile */
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size_t grow; /* step to grow datafile */
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size_t shrink; /* threshold to shrink datafile */
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} me_dbgeo;
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#if defined(_WIN32) || defined(_WIN64)
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MDBX_srwlock me_remap_guard;
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/* Workaround for LockFileEx and WriteFile multithread bug */
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CRITICAL_SECTION me_windowsbug_lock;
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#else
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mdbx_fastmutex_t me_remap_guard;
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#endif
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};
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#ifndef __cplusplus
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