LMDB
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Lightning memory-mapped database library. More...
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/param.h>
#include <sys/uio.h>
#include <sys/mman.h>
#include <fcntl.h>
#include <errno.h>
#include <limits.h>
#include <stddef.h>
#include <inttypes.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <unistd.h>
#include <netinet/in.h>
#include <resolv.h>
#include <pthread.h>
#include <signal.h>
#include "lmdb.h"
#include "midl.h"
Data Structures | |
struct | MDB_rxbody |
struct | MDB_reader |
struct | MDB_txbody |
struct | MDB_txninfo |
struct | MDB_page |
struct | MDB_node |
struct | MDB_db |
struct | MDB_meta |
union | MDB_metabuf |
struct | MDB_dbx |
struct | MDB_txn |
Opaque structure for a transaction handle. More... | |
struct | MDB_cursor |
Opaque structure for navigating through a database. More... | |
struct | MDB_xcursor |
struct | MDB_pgstate |
struct | MDB_env |
Opaque structure for a database environment. More... | |
struct | MDB_ntxn |
struct | MDB_name |
struct | mdb_copy |
Macros | |
#define | _GNU_SOURCE 1 |
#define | MDB_PID_T pid_t |
#define | MDB_THR_T pthread_t |
#define | CACHEFLUSH(addr, bytes, cache) |
#define | MDB_USE_POSIX_MUTEX 1 |
#define | VGMEMP_CREATE(h, r, z) |
#define | VGMEMP_ALLOC(h, a, s) |
#define | VGMEMP_FREE(h, a) |
#define | VGMEMP_DESTROY(h) |
#define | VGMEMP_DEFINED(a, s) |
#define | BYTE_ORDER __BYTE_ORDER |
#define | LITTLE_ENDIAN __LITTLE_ENDIAN |
#define | BIG_ENDIAN __BIG_ENDIAN |
#define | ESECT __attribute__ ((section("text_env"))) |
#define | CALL_CONV |
#define | MDB_DEVEL 0 |
#define | mdb_func_ "<mdb_unknown>" |
#define | MDB_NO_ROOT (MDB_LAST_ERRCODE + 10) |
#define | MDB_USE_ROBUST 1 |
#define | THREAD_RET void * |
#define | THREAD_CREATE(thr, start, arg) pthread_create(&thr,NULL,start,arg) |
#define | THREAD_FINISH(thr) pthread_join(thr,NULL) |
#define | Z "z" |
#define | MDB_PIDLOCK 1 |
#define | LOCK_MUTEX0(mutex) pthread_mutex_lock(mutex) |
#define | UNLOCK_MUTEX(mutex) pthread_mutex_unlock(mutex) |
#define | mdb_mutex_consistent(mutex) pthread_mutex_consistent(mutex) |
#define | ErrCode() errno |
#define | HANDLE int |
#define | INVALID_HANDLE_VALUE (-1) |
#define | GET_PAGESIZE(x) ((x) = sysconf(_SC_PAGE_SIZE)) |
#define | MNAME_LEN (sizeof(pthread_mutex_t)) |
#define | LOCK_MUTEX(rc, env, mutex) ((rc) = LOCK_MUTEX0(mutex)) |
#define | mdb_mutex_failed(env, mutex, rc) (rc) |
#define | MDB_DSYNC O_SYNC |
#define | MDB_FDATASYNC fdatasync |
#define | MDB_MSYNC(addr, len, flags) msync(addr,len,flags) |
#define | MS_SYNC 1 |
#define | MS_ASYNC 0 |
#define | MDB_DEBUG 0 |
#define | DPRINTF(args) ((void) 0) |
#define | DPUTS(arg) DPRINTF(("%s", arg)) |
#define | DDBI(mc) (((mc)->mc_flags & C_SUB) ? -(int)(mc)->mc_dbi : (int)(mc)->mc_dbi) |
#define | MAX_PAGESIZE (PAGEBASE ? 0x10000 : 0x8000) |
The maximum size of a database page. More... | |
#define | MDB_MINKEYS 2 |
#define | MDB_MAGIC 0xBEEFC0DE |
#define | MDB_DATA_VERSION ((MDB_DEVEL) ? 999 : 1) |
#define | MDB_LOCK_VERSION 1 |
#define | MDB_MAXKEYSIZE ((MDB_DEVEL) ? 0 : 511) |
The max size of a key we can write, or 0 for computed max. More... | |
#define | ENV_MAXKEY(env) (MDB_MAXKEYSIZE) |
#define | MAXDATASIZE 0xffffffffUL |
The maximum size of a data item. More... | |
#define | DKBUF |
#define | DKEY(x) 0 |
#define | P_INVALID (~(pgno_t)0) |
#define | F_ISSET(w, f) (((w) & (f)) == (f)) |
#define | EVEN(n) (((n) + 1U) & -2) /* sign-extending -2 to match n+1U */ |
#define | DEFAULT_MAPSIZE 1048576 |
#define | DEFAULT_READERS 126 |
#define | CACHELINE 64 |
#define | mr_txnid mru.mrx.mrb_txnid |
#define | mr_pid mru.mrx.mrb_pid |
#define | mr_tid mru.mrx.mrb_tid |
#define | mti_magic mt1.mtb.mtb_magic |
#define | mti_format mt1.mtb.mtb_format |
#define | mti_rmutex mt1.mtb.mtb_rmutex |
#define | mti_rmname mt1.mtb.mtb_rmname |
#define | mti_txnid mt1.mtb.mtb_txnid |
#define | mti_numreaders mt1.mtb.mtb_numreaders |
#define | mti_wmutex mt2.mt2_wmutex |
#define | MDB_LOCK_FORMAT |
#define | mp_pgno mp_p.p_pgno |
#define | mp_next mp_p.p_next |
#define | P_BRANCH 0x01 |
#define | P_LEAF 0x02 |
#define | P_OVERFLOW 0x04 |
#define | P_META 0x08 |
#define | P_DIRTY 0x10 |
#define | P_LEAF2 0x20 |
#define | P_SUBP 0x40 |
#define | P_LOOSE 0x4000 |
#define | P_KEEP 0x8000 |
#define | mp_lower mp_pb.pb.pb_lower |
#define | mp_upper mp_pb.pb.pb_upper |
#define | mp_pages mp_pb.pb_pages |
#define | PAGEHDRSZ ((unsigned) offsetof(MDB_page, mp_ptrs)) |
#define | METADATA(p) ((void *)((char *)(p) + PAGEHDRSZ)) |
#define | PAGEBASE ((MDB_DEVEL) ? PAGEHDRSZ : 0) |
#define | NUMKEYS(p) (((p)->mp_lower - (PAGEHDRSZ-PAGEBASE)) >> 1) |
#define | SIZELEFT(p) (indx_t)((p)->mp_upper - (p)->mp_lower) |
#define | PAGEFILL(env, p) |
#define | FILL_THRESHOLD 250 |
#define | IS_LEAF(p) F_ISSET((p)->mp_flags, P_LEAF) |
#define | IS_LEAF2(p) F_ISSET((p)->mp_flags, P_LEAF2) |
#define | IS_BRANCH(p) F_ISSET((p)->mp_flags, P_BRANCH) |
#define | IS_OVERFLOW(p) F_ISSET((p)->mp_flags, P_OVERFLOW) |
#define | IS_SUBP(p) F_ISSET((p)->mp_flags, P_SUBP) |
#define | OVPAGES(size, psize) ((PAGEHDRSZ-1 + (size)) / (psize) + 1) |
#define | NEXT_LOOSE_PAGE(p) (*(MDB_page **)((p) + 2)) |
#define | F_BIGDATA 0x01 |
#define | F_SUBDATA 0x02 |
#define | F_DUPDATA 0x04 |
#define | NODE_ADD_FLAGS (F_DUPDATA|F_SUBDATA|MDB_RESERVE|MDB_APPEND) |
#define | NODESIZE offsetof(MDB_node, mn_data) |
#define | PGNO_TOPWORD ((pgno_t)-1 > 0xffffffffu ? 32 : 0) |
#define | INDXSIZE(k) (NODESIZE + ((k) == NULL ? 0 : (k)->mv_size)) |
#define | LEAFSIZE(k, d) (NODESIZE + (k)->mv_size + (d)->mv_size) |
#define | NODEPTR(p, i) ((MDB_node *)((char *)(p) + (p)->mp_ptrs[i] + PAGEBASE)) |
#define | NODEKEY(node) (void *)((node)->mn_data) |
#define | NODEDATA(node) (void *)((char *)(node)->mn_data + (node)->mn_ksize) |
#define | NODEPGNO(node) |
#define | SETPGNO(node, pgno) |
#define | NODEDSZ(node) ((node)->mn_lo | ((unsigned)(node)->mn_hi << 16)) |
#define | SETDSZ(node, size) |
#define | NODEKSZ(node) ((node)->mn_ksize) |
#define | COPY_PGNO(dst, src) |
#define | LEAF2KEY(p, i, ks) ((char *)(p) + PAGEHDRSZ + ((i)*(ks))) |
#define | MDB_GET_KEY(node, keyptr) |
#define | MDB_GET_KEY2(node, key) { key.mv_size = NODEKSZ(node); key.mv_data = NODEKEY(node); } |
#define | MDB_VALID 0x8000 |
#define | PERSISTENT_FLAGS (0xffff & ~(MDB_VALID)) |
#define | VALID_FLAGS |
#define | FREE_DBI 0 |
#define | MAIN_DBI 1 |
#define | CORE_DBS 2 |
#define | NUM_METAS 2 |
#define | mm_psize mm_dbs[FREE_DBI].md_pad |
#define | mm_flags mm_dbs[FREE_DBI].md_flags |
#define | DB_DIRTY 0x01 |
#define | DB_STALE 0x02 |
#define | DB_NEW 0x04 |
#define | DB_VALID 0x08 |
#define | DB_USRVALID 0x10 |
#define | DB_DUPDATA 0x20 |
#define | MDB_TXN_BEGIN_FLAGS MDB_RDONLY |
#define | MDB_TXN_RDONLY MDB_RDONLY |
#define | MDB_TXN_WRITEMAP MDB_WRITEMAP |
#define | MDB_TXN_FINISHED 0x01 |
#define | MDB_TXN_ERROR 0x02 |
#define | MDB_TXN_DIRTY 0x04 |
#define | MDB_TXN_SPILLS 0x08 |
#define | MDB_TXN_HAS_CHILD 0x10 |
#define | MDB_TXN_BLOCKED (MDB_TXN_FINISHED|MDB_TXN_ERROR|MDB_TXN_HAS_CHILD) |
#define | CURSOR_STACK 32 |
#define | C_INITIALIZED 0x01 |
#define | C_EOF 0x02 |
#define | C_SUB 0x04 |
#define | C_DEL 0x08 |
#define | C_UNTRACK 0x40 |
#define | XCURSOR_INITED(mc) ((mc)->mc_xcursor && ((mc)->mc_xcursor->mx_cursor.mc_flags & C_INITIALIZED)) |
#define | XCURSOR_REFRESH(mc, top, mp) |
#define | MDB_FATAL_ERROR 0x80000000U |
#define | MDB_ENV_ACTIVE 0x20000000U |
#define | MDB_ENV_TXKEY 0x10000000U |
#define | MDB_FSYNCONLY 0x08000000U |
#define | me_pglast me_pgstate.mf_pglast |
#define | me_pghead me_pgstate.mf_pghead |
#define | me_rmutex me_txns->mti_rmutex |
#define | me_wmutex me_txns->mti_wmutex |
#define | MDB_COMMIT_PAGES 64 |
#define | MAX_WRITE (0x40000000U >> (sizeof(ssize_t) == 4)) |
#define | TXN_DBI_EXIST(txn, dbi, validity) ((txn) && (dbi)<(txn)->mt_numdbs && ((txn)->mt_dbflags[dbi] & (validity))) |
#define | TXN_DBI_CHANGED(txn, dbi) ((txn)->mt_dbiseqs[dbi] != (txn)->mt_env->me_dbiseqs[dbi]) |
#define | MDB_END_NAMES |
#define | MDB_END_OPMASK 0x0F |
#define | MDB_END_UPDATE 0x10 |
#define | MDB_END_FREE 0x20 |
#define | MDB_END_SLOT MDB_NOTLS |
#define | MDB_PS_MODIFY 1 |
#define | MDB_PS_ROOTONLY 2 |
#define | MDB_PS_FIRST 4 |
#define | MDB_PS_LAST 8 |
#define | MDB_SPLIT_REPLACE MDB_APPENDDUP |
#define | mdb_env_close0(env, excl) mdb_env_close1(env) |
#define | mdb_cmp_clong mdb_cmp_cint |
#define | mdb_cassert(mc, expr) mdb_assert0((mc)->mc_txn->mt_env, expr, #expr) |
#define | mdb_tassert(txn, expr) mdb_assert0((txn)->mt_env, expr, #expr) |
#define | mdb_eassert(env, expr) mdb_assert0(env, expr, #expr) |
#define | mdb_assert0(env, expr, expr_txt) |
#define | DO_PWRITE(rc, fd, ptr, size, len, pos) |
#define | MDB_NAME(str) str |
#define | mdb_name_cpy strcpy |
#define | MDB_SUFFLEN 9 |
#define | mdb_fname_destroy(fname) do { if ((fname).mn_alloced) free((fname).mn_val); } while (0) |
#define | MDB_CLOEXEC 0 |
#define | MDB_ERRCODE_ROFS EROFS |
#define | CHANGEABLE (MDB_NOSYNC|MDB_NOMETASYNC|MDB_MAPASYNC|MDB_NOMEMINIT) |
#define | CHANGELESS |
#define | MDB_NOSPILL 0x8000 |
#define | WITH_CURSOR_TRACKING(mn, act) |
#define | MDB_WBUF (1024*1024) |
#define | MDB_EOF 0x10 |
#define | DO_WRITE(rc, fd, ptr, w2, len) len = write(fd, ptr, w2); rc = (len >= 0) |
#define | DO_WRITE(rc, fd, ptr, w2, len) len = write(fd, ptr, w2); rc = (len >= 0) |
Typedefs | |
typedef pthread_mutex_t | mdb_mutex_t[1] |
typedef pthread_mutex_t * | mdb_mutexref_t |
typedef MDB_ID | pgno_t |
typedef MDB_ID | txnid_t |
typedef uint16_t | indx_t |
typedef char | mdb_nchar_t |
Enumerations | |
enum | { MDB_END_COMMITTED, MDB_END_EMPTY_COMMIT, MDB_END_ABORT, MDB_END_RESET, MDB_END_RESET_TMP, MDB_END_FAIL_BEGIN, MDB_END_FAIL_BEGINCHILD } |
enum | Pidlock_op { Pidset = F_SETLK, Pidcheck = F_GETLK } |
enum | mdb_fopen_type { MDB_O_RDONLY = O_RDONLY, MDB_O_RDWR = O_RDWR |O_CREAT, MDB_O_META = O_WRONLY|MDB_DSYNC |MDB_CLOEXEC, MDB_O_COPY = O_WRONLY|O_CREAT|O_EXCL|MDB_CLOEXEC, MDB_O_MASK = MDB_O_RDWR|MDB_CLOEXEC | MDB_O_RDONLY|MDB_O_META|MDB_O_COPY, MDB_O_LOCKS = MDB_O_RDWR|MDB_CLOEXEC | ((MDB_O_MASK+1) & ~MDB_O_MASK) } |
Functions | |
static int | mdb_page_alloc (MDB_cursor *mc, int num, MDB_page **mp) |
static int | mdb_page_new (MDB_cursor *mc, uint32_t flags, int num, MDB_page **mp) |
static int | mdb_page_touch (MDB_cursor *mc) |
static void | mdb_txn_end (MDB_txn *txn, unsigned mode) |
static int | mdb_page_get (MDB_cursor *mc, pgno_t pgno, MDB_page **mp, int *lvl) |
static int | mdb_page_search_root (MDB_cursor *mc, MDB_val *key, int modify) |
static int | mdb_page_search (MDB_cursor *mc, MDB_val *key, int flags) |
static int | mdb_page_merge (MDB_cursor *csrc, MDB_cursor *cdst) |
static int | mdb_page_split (MDB_cursor *mc, MDB_val *newkey, MDB_val *newdata, pgno_t newpgno, unsigned int nflags) |
static int | mdb_env_read_header (MDB_env *env, MDB_meta *meta) |
static MDB_meta * | mdb_env_pick_meta (const MDB_env *env) |
static int | mdb_env_write_meta (MDB_txn *txn) |
static void | mdb_env_close0 (MDB_env *env, int excl) |
static MDB_node * | mdb_node_search (MDB_cursor *mc, MDB_val *key, int *exactp) |
static int | mdb_node_add (MDB_cursor *mc, indx_t indx, MDB_val *key, MDB_val *data, pgno_t pgno, unsigned int flags) |
static void | mdb_node_del (MDB_cursor *mc, int ksize) |
static void | mdb_node_shrink (MDB_page *mp, indx_t indx) |
static int | mdb_node_move (MDB_cursor *csrc, MDB_cursor *cdst, int fromleft) |
static int | mdb_node_read (MDB_cursor *mc, MDB_node *leaf, MDB_val *data) |
static size_t | mdb_leaf_size (MDB_env *env, MDB_val *key, MDB_val *data) |
static size_t | mdb_branch_size (MDB_env *env, MDB_val *key) |
static int | mdb_rebalance (MDB_cursor *mc) |
static int | mdb_update_key (MDB_cursor *mc, MDB_val *key) |
static void | mdb_cursor_pop (MDB_cursor *mc) |
static int | mdb_cursor_push (MDB_cursor *mc, MDB_page *mp) |
static int | mdb_cursor_del0 (MDB_cursor *mc) |
static int | mdb_del0 (MDB_txn *txn, MDB_dbi dbi, MDB_val *key, MDB_val *data, unsigned flags) |
static int | mdb_cursor_sibling (MDB_cursor *mc, int move_right) |
static int | mdb_cursor_next (MDB_cursor *mc, MDB_val *key, MDB_val *data, MDB_cursor_op op) |
static int | mdb_cursor_prev (MDB_cursor *mc, MDB_val *key, MDB_val *data, MDB_cursor_op op) |
static int | mdb_cursor_set (MDB_cursor *mc, MDB_val *key, MDB_val *data, MDB_cursor_op op, int *exactp) |
static int | mdb_cursor_first (MDB_cursor *mc, MDB_val *key, MDB_val *data) |
static int | mdb_cursor_last (MDB_cursor *mc, MDB_val *key, MDB_val *data) |
static void | mdb_cursor_init (MDB_cursor *mc, MDB_txn *txn, MDB_dbi dbi, MDB_xcursor *mx) |
static void | mdb_xcursor_init0 (MDB_cursor *mc) |
static void | mdb_xcursor_init1 (MDB_cursor *mc, MDB_node *node) |
static void | mdb_xcursor_init2 (MDB_cursor *mc, MDB_xcursor *src_mx, int force) |
static int | mdb_drop0 (MDB_cursor *mc, int subs) |
static void | mdb_default_cmp (MDB_txn *txn, MDB_dbi dbi) |
static int | mdb_reader_check0 (MDB_env *env, int rlocked, int *dead) |
char *ESECT | mdb_version (int *major, int *minor, int *patch) |
Return the LMDB library version information. More... | |
char * | mdb_strerror (int err) |
Return a string describing a given error code. More... | |
static void ESECT | mdb_assert_fail (MDB_env *env, const char *expr_txt, const char *func, const char *file, int line) |
int | mdb_cmp (MDB_txn *txn, MDB_dbi dbi, const MDB_val *a, const MDB_val *b) |
Compare two data items according to a particular database. More... | |
int | mdb_dcmp (MDB_txn *txn, MDB_dbi dbi, const MDB_val *a, const MDB_val *b) |
Compare two data items according to a particular database. More... | |
static MDB_page * | mdb_page_malloc (MDB_txn *txn, unsigned num) |
static void | mdb_page_free (MDB_env *env, MDB_page *mp) |
static void | mdb_dpage_free (MDB_env *env, MDB_page *dp) |
static void | mdb_dlist_free (MDB_txn *txn) |
static int | mdb_page_loose (MDB_cursor *mc, MDB_page *mp) |
static int | mdb_pages_xkeep (MDB_cursor *mc, unsigned pflags, int all) |
static int | mdb_page_flush (MDB_txn *txn, int keep) |
static int | mdb_page_spill (MDB_cursor *m0, MDB_val *key, MDB_val *data) |
static txnid_t | mdb_find_oldest (MDB_txn *txn) |
static void | mdb_page_dirty (MDB_txn *txn, MDB_page *mp) |
static void | mdb_page_copy (MDB_page *dst, MDB_page *src, unsigned int psize) |
static int | mdb_page_unspill (MDB_txn *txn, MDB_page *mp, MDB_page **ret) |
int | mdb_env_sync (MDB_env *env, int force) |
Flush the data buffers to disk. More... | |
static int | mdb_cursor_shadow (MDB_txn *src, MDB_txn *dst) |
static void | mdb_cursors_close (MDB_txn *txn, unsigned merge) |
static int | mdb_reader_pid (MDB_env *env, enum Pidlock_op op, MDB_PID_T pid) |
static int | mdb_txn_renew0 (MDB_txn *txn) |
int | mdb_txn_renew (MDB_txn *txn) |
Renew a read-only transaction. More... | |
int | mdb_txn_begin (MDB_env *env, MDB_txn *parent, unsigned int flags, MDB_txn **ret) |
Create a transaction for use with the environment. More... | |
MDB_env * | mdb_txn_env (MDB_txn *txn) |
Returns the transaction's MDB_env. More... | |
size_t | mdb_txn_id (MDB_txn *txn) |
Return the transaction's ID. More... | |
static void | mdb_dbis_update (MDB_txn *txn, int keep) |
void | mdb_txn_reset (MDB_txn *txn) |
Reset a read-only transaction. More... | |
void | mdb_txn_abort (MDB_txn *txn) |
Abandon all the operations of the transaction instead of saving them. More... | |
static int | mdb_freelist_save (MDB_txn *txn) |
int | mdb_txn_commit (MDB_txn *txn) |
Commit all the operations of a transaction into the database. More... | |
static void ESECT | mdb_env_init_meta0 (MDB_env *env, MDB_meta *meta) |
static int ESECT | mdb_env_init_meta (MDB_env *env, MDB_meta *meta) |
int ESECT | mdb_env_create (MDB_env **env) |
Create an LMDB environment handle. More... | |
static int ESECT | mdb_env_map (MDB_env *env, void *addr) |
int ESECT | mdb_env_set_mapsize (MDB_env *env, size_t size) |
Set the size of the memory map to use for this environment. More... | |
int ESECT | mdb_env_set_maxdbs (MDB_env *env, MDB_dbi dbs) |
Set the maximum number of named databases for the environment. More... | |
int ESECT | mdb_env_set_maxreaders (MDB_env *env, unsigned int readers) |
Set the maximum number of threads/reader slots for the environment. More... | |
int ESECT | mdb_env_get_maxreaders (MDB_env *env, unsigned int *readers) |
Get the maximum number of threads/reader slots for the environment. More... | |
static int ESECT | mdb_fsize (HANDLE fd, size_t *size) |
static int ESECT | mdb_fname_init (const char *path, unsigned envflags, MDB_name *fname) |
static int ESECT | mdb_fopen (const MDB_env *env, MDB_name *fname, enum mdb_fopen_type which, mdb_mode_t mode, HANDLE *res) |
static int ESECT | mdb_env_open2 (MDB_env *env) |
static void | mdb_env_reader_dest (void *ptr) |
static int ESECT | mdb_env_share_locks (MDB_env *env, int *excl) |
static int ESECT | mdb_env_excl_lock (MDB_env *env, int *excl) |
static int ESECT | mdb_env_setup_locks (MDB_env *env, MDB_name *fname, int mode, int *excl) |
int ESECT | mdb_env_open (MDB_env *env, const char *path, unsigned int flags, mdb_mode_t mode) |
Open an environment handle. More... | |
void ESECT | mdb_env_close (MDB_env *env) |
Close the environment and release the memory map. More... | |
static int | mdb_cmp_long (const MDB_val *a, const MDB_val *b) |
static int | mdb_cmp_int (const MDB_val *a, const MDB_val *b) |
static int | mdb_cmp_cint (const MDB_val *a, const MDB_val *b) |
static int | mdb_cmp_memn (const MDB_val *a, const MDB_val *b) |
static int | mdb_cmp_memnr (const MDB_val *a, const MDB_val *b) |
static int | mdb_page_search_lowest (MDB_cursor *mc) |
static int | mdb_ovpage_free (MDB_cursor *mc, MDB_page *mp) |
int | mdb_get (MDB_txn *txn, MDB_dbi dbi, MDB_val *key, MDB_val *data) |
Get items from a database. More... | |
int | mdb_cursor_get (MDB_cursor *mc, MDB_val *key, MDB_val *data, MDB_cursor_op op) |
Retrieve by cursor. More... | |
static int | mdb_cursor_touch (MDB_cursor *mc) |
int | mdb_cursor_put (MDB_cursor *mc, MDB_val *key, MDB_val *data, unsigned int flags) |
Store by cursor. More... | |
int | mdb_cursor_del (MDB_cursor *mc, unsigned int flags) |
Delete current key/data pair. More... | |
int | mdb_cursor_open (MDB_txn *txn, MDB_dbi dbi, MDB_cursor **ret) |
Create a cursor handle. More... | |
int | mdb_cursor_renew (MDB_txn *txn, MDB_cursor *mc) |
Renew a cursor handle. More... | |
int | mdb_cursor_count (MDB_cursor *mc, size_t *countp) |
Return count of duplicates for current key. More... | |
void | mdb_cursor_close (MDB_cursor *mc) |
Close a cursor handle. More... | |
MDB_txn * | mdb_cursor_txn (MDB_cursor *mc) |
Return the cursor's transaction handle. More... | |
MDB_dbi | mdb_cursor_dbi (MDB_cursor *mc) |
Return the cursor's database handle. More... | |
static void | mdb_cursor_copy (const MDB_cursor *csrc, MDB_cursor *cdst) |
int | mdb_del (MDB_txn *txn, MDB_dbi dbi, MDB_val *key, MDB_val *data) |
Delete items from a database. More... | |
int | mdb_put (MDB_txn *txn, MDB_dbi dbi, MDB_val *key, MDB_val *data, unsigned int flags) |
Store items into a database. More... | |
static THREAD_RET ESECT CALL_CONV | mdb_env_copythr (void *arg) |
static int ESECT | mdb_env_cthr_toggle (mdb_copy *my, int adjust) |
static int ESECT | mdb_env_cwalk (mdb_copy *my, pgno_t *pg, int flags) |
static int ESECT | mdb_env_copyfd1 (MDB_env *env, HANDLE fd) |
static int ESECT | mdb_env_copyfd0 (MDB_env *env, HANDLE fd) |
int ESECT | mdb_env_copyfd2 (MDB_env *env, HANDLE fd, unsigned int flags) |
int ESECT | mdb_env_copyfd (MDB_env *env, HANDLE fd) |
int ESECT | mdb_env_copy2 (MDB_env *env, const char *path, unsigned int flags) |
Copy an LMDB environment to the specified path, with options. More... | |
int ESECT | mdb_env_copy (MDB_env *env, const char *path) |
Copy an LMDB environment to the specified path. More... | |
int ESECT | mdb_env_set_flags (MDB_env *env, unsigned int flag, int onoff) |
Set environment flags. More... | |
int ESECT | mdb_env_get_flags (MDB_env *env, unsigned int *arg) |
Get environment flags. More... | |
int ESECT | mdb_env_set_userctx (MDB_env *env, void *ctx) |
Set application information associated with the MDB_env. More... | |
void *ESECT | mdb_env_get_userctx (MDB_env *env) |
Get the application information associated with the MDB_env. More... | |
int ESECT | mdb_env_set_assert (MDB_env *env, MDB_assert_func *func) |
int ESECT | mdb_env_get_path (MDB_env *env, const char **arg) |
Return the path that was used in mdb_env_open(). More... | |
int ESECT | mdb_env_get_fd (MDB_env *env, mdb_filehandle_t *arg) |
Return the filedescriptor for the given environment. More... | |
static int ESECT | mdb_stat0 (MDB_env *env, MDB_db *db, MDB_stat *arg) |
int ESECT | mdb_env_stat (MDB_env *env, MDB_stat *arg) |
Return statistics about the LMDB environment. More... | |
int ESECT | mdb_env_info (MDB_env *env, MDB_envinfo *arg) |
Return information about the LMDB environment. More... | |
int | mdb_dbi_open (MDB_txn *txn, const char *name, unsigned int flags, MDB_dbi *dbi) |
Open a database in the environment. More... | |
int ESECT | mdb_stat (MDB_txn *txn, MDB_dbi dbi, MDB_stat *arg) |
Retrieve statistics for a database. More... | |
void | mdb_dbi_close (MDB_env *env, MDB_dbi dbi) |
Close a database handle. Normally unnecessary. Use with care: More... | |
int | mdb_dbi_flags (MDB_txn *txn, MDB_dbi dbi, unsigned int *flags) |
Retrieve the DB flags for a database handle. More... | |
int | mdb_drop (MDB_txn *txn, MDB_dbi dbi, int del) |
Empty or delete+close a database. More... | |
int | mdb_set_compare (MDB_txn *txn, MDB_dbi dbi, MDB_cmp_func *cmp) |
Set a custom key comparison function for a database. More... | |
int | mdb_set_dupsort (MDB_txn *txn, MDB_dbi dbi, MDB_cmp_func *cmp) |
Set a custom data comparison function for a MDB_DUPSORT database. More... | |
int | mdb_set_relfunc (MDB_txn *txn, MDB_dbi dbi, MDB_rel_func *rel) |
Set a relocation function for a MDB_FIXEDMAP database. More... | |
int | mdb_set_relctx (MDB_txn *txn, MDB_dbi dbi, void *ctx) |
Set a context pointer for a MDB_FIXEDMAP database's relocation function. More... | |
int ESECT | mdb_env_get_maxkeysize (MDB_env *env) |
Get the maximum size of keys and MDB_DUPSORT data we can write. More... | |
int ESECT | mdb_reader_list (MDB_env *env, MDB_msg_func *func, void *ctx) |
Dump the entries in the reader lock table. More... | |
static int ESECT | mdb_pid_insert (MDB_PID_T *ids, MDB_PID_T pid) |
int ESECT | mdb_reader_check (MDB_env *env, int *dead) |
Check for stale entries in the reader lock table. More... | |
Variables | |
static char *const | mdb_errstr [] |
static const mdb_nchar_t *const | mdb_suffixes [2][2] |
Lightning memory-mapped database library.
A Btree-based database management library modeled loosely on the BerkeleyDB API, but much simplified.
#define ESECT __attribute__ ((section("text_env"))) |
Put infrequently used env functions in separate section
#define mr_txnid mru.mrx.mrb_txnid |
shorthand for mrb_txnid
#define mm_psize mm_dbs[FREE_DBI].md_pad |
The size of pages used in this DB
#define mm_flags mm_dbs[FREE_DBI].md_flags |
Any persistent environment flags. Environment Flags
#define MDB_FATAL_ERROR 0x80000000U |
Failed to update the meta page. Probably an I/O error.
#define MDB_ENV_ACTIVE 0x20000000U |
Some fields are initialized.
#define MDB_ENV_TXKEY 0x10000000U |
me_txkey is set
#define MDB_FSYNCONLY 0x08000000U |
fdatasync is unreliable
#define me_rmutex me_txns->mti_rmutex |
Shared reader lock
#define me_wmutex me_txns->mti_wmutex |
Shared writer lock
#define DO_PWRITE | ( | rc, | |
fd, | |||
ptr, | |||
size, | |||
len, | |||
pos | |||
) |