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Howard Chu
parent
2b5e155816
commit
31e4e8c3a3
19
external/db_drivers/liblmdb/lmdb.h
vendored
19
external/db_drivers/liblmdb/lmdb.h
vendored
@ -78,6 +78,11 @@
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* access to locks and lock file. Exceptions: On read-only filesystems
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* or with the #MDB_NOLOCK flag described under #mdb_env_open().
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*
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* - An LMDB configuration will often reserve considerable \b unused
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* memory address space and maybe file size for future growth.
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* This does not use actual memory or disk space, but users may need
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* to understand the difference so they won't be scared off.
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*
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* - By default, in versions before 0.9.10, unused portions of the data
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* file might receive garbage data from memory freed by other code.
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* (This does not happen when using the #MDB_WRITEMAP flag.) As of
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@ -130,7 +135,7 @@
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*
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* @author Howard Chu, Symas Corporation.
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*
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* @copyright Copyright 2011-2015 Howard Chu, Symas Corp. All rights reserved.
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* @copyright Copyright 2011-2016 Howard Chu, Symas Corp. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted only as authorized by the OpenLDAP
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@ -392,7 +397,9 @@ typedef enum MDB_cursor_op {
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MDB_PREV_NODUP, /**< Position at last data item of previous key */
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MDB_SET, /**< Position at specified key */
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MDB_SET_KEY, /**< Position at specified key, return key + data */
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MDB_SET_RANGE /**< Position at first key greater than or equal to specified key. */
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MDB_SET_RANGE, /**< Position at first key greater than or equal to specified key. */
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MDB_PREV_MULTIPLE /**< Position at previous page and return key and up to
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a page of duplicate data items. Only for #MDB_DUPFIXED */
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} MDB_cursor_op;
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/** @defgroup errors Return Codes
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@ -538,9 +545,11 @@ int mdb_env_create(MDB_env **env);
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* allowed. LMDB will still modify the lock file - except on read-only
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* filesystems, where LMDB does not use locks.
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* <li>#MDB_WRITEMAP
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* Use a writeable memory map unless MDB_RDONLY is set. This is faster
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* and uses fewer mallocs, but loses protection from application bugs
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* Use a writeable memory map unless MDB_RDONLY is set. This uses
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* fewer mallocs but loses protection from application bugs
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* like wild pointer writes and other bad updates into the database.
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* This may be slightly faster for DBs that fit entirely in RAM, but
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* is slower for DBs larger than RAM.
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* Incompatible with nested transactions.
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* Do not mix processes with and without MDB_WRITEMAP on the same
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* environment. This can defeat durability (#mdb_env_sync etc).
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@ -1535,7 +1544,7 @@ int mdb_cursor_del(MDB_cursor *cursor, unsigned int flags);
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* <li>EINVAL - cursor is not initialized, or an invalid parameter was specified.
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* </ul>
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*/
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int mdb_cursor_count(MDB_cursor *cursor, size_t *countp);
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int mdb_cursor_count(MDB_cursor *cursor, mdb_size_t *countp);
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/** @brief Compare two data items according to a particular database.
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*
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80
external/db_drivers/liblmdb/mdb.c
vendored
80
external/db_drivers/liblmdb/mdb.c
vendored
@ -5,7 +5,7 @@
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* BerkeleyDB API, but much simplified.
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*/
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/*
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* Copyright 2011-2015 Howard Chu, Symas Corp.
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* Copyright 2011-2016 Howard Chu, Symas Corp.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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@ -1075,7 +1075,7 @@ typedef struct MDB_db {
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pgno_t md_branch_pages; /**< number of internal pages */
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pgno_t md_leaf_pages; /**< number of leaf pages */
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pgno_t md_overflow_pages; /**< number of overflow pages */
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pgno_t md_entries; /**< number of data items */
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mdb_size_t md_entries; /**< number of data items */
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pgno_t md_root; /**< the root page of this tree */
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} MDB_db;
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@ -1426,7 +1426,7 @@ typedef struct MDB_ntxn {
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#endif
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/** max bytes to write in one call */
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#define MAX_WRITE (0x80000000U >> (sizeof(ssize_t) == 4))
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#define MAX_WRITE (0x40000000U >> (sizeof(ssize_t) == 4))
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/** Check \b txn and \b dbi arguments to a function */
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#define TXN_DBI_EXIST(txn, dbi, validity) \
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@ -4160,6 +4160,19 @@ mdb_env_create(MDB_env **env)
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return MDB_SUCCESS;
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}
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#ifdef _WIN32
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/** @brief Map a result from an NTAPI call to WIN32. */
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static DWORD
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mdb_nt2win32(NTSTATUS st)
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{
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OVERLAPPED o = {0};
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DWORD br;
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o.Internal = st;
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GetOverlappedResult(NULL, &o, &br, FALSE);
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return GetLastError();
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}
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#endif
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static int ESECT
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mdb_env_map(MDB_env *env, void *addr)
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{
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@ -4189,7 +4202,7 @@ mdb_env_map(MDB_env *env, void *addr)
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rc = NtCreateSection(&mh, access, NULL, NULL, secprot, SEC_RESERVE, env->me_fd);
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if (rc)
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return rc;
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return mdb_nt2win32(rc);
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map = addr;
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#ifdef MDB_VL32
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msize = NUM_METAS * env->me_psize;
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@ -4201,7 +4214,7 @@ mdb_env_map(MDB_env *env, void *addr)
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NtClose(mh);
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#endif
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if (rc)
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return rc;
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return mdb_nt2win32(rc);
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env->me_map = map;
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#else
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#ifdef MDB_VL32
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@ -5256,14 +5269,16 @@ mdb_env_close0(MDB_env *env, int excl)
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free(env->me_dbflags);
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free(env->me_path);
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free(env->me_dirty_list);
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free(env->me_txn0);
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#ifdef MDB_VL32
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if (env->me_txn0 && env->me_txn0->mt_rpages)
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free(env->me_txn0->mt_rpages);
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{ unsigned int x;
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for (x=1; x<=env->me_rpages[0].mid; x++)
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munmap(env->me_rpages[x].mptr, env->me_rpages[x].mcnt * env->me_psize);
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}
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free(env->me_rpages);
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#endif
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free(env->me_txn0);
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mdb_midl_free(env->me_free_pgs);
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if (env->me_flags & MDB_ENV_TXKEY) {
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@ -5691,7 +5706,8 @@ mdb_rpage_get(MDB_txn *txn, pgno_t pg0, MDB_page **ret)
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#define MAP(rc,env,addr,len,off) \
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addr = NULL; \
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rc = NtMapViewOfSection(env->me_fmh, GetCurrentProcess(), &addr, 0, \
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len, &off, &len, ViewUnmap, (env->me_flags & MDB_RDONLY) ? 0 : MEM_RESERVE, PAGE_READONLY)
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len, &off, &len, ViewUnmap, (env->me_flags & MDB_RDONLY) ? 0 : MEM_RESERVE, PAGE_READONLY); \
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if (rc) rc = mdb_nt2win32(rc)
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#else
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off_t off;
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size_t len;
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@ -5765,7 +5781,7 @@ notlocal:
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pthread_mutex_lock(&env->me_rpmutex);
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retry:
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y = 0;
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for (i=1; i<tl[0].mid; i++) {
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for (i=1; i<=tl[0].mid; i++) {
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if (!tl[i].mref) {
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if (!y) y = i;
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/* tmp overflow pages don't go to env */
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@ -5845,7 +5861,7 @@ retry:
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if (el[0].mid >= MDB_ERPAGE_MAX - env->me_rpcheck) {
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/* purge unref'd pages */
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unsigned i, y = 0;
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for (i=1; i<el[0].mid; i++) {
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for (i=1; i<=el[0].mid; i++) {
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if (!el[i].mref) {
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if (!y) y = i;
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munmap(el[i].mptr, env->me_psize * el[i].mcnt);
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@ -6436,8 +6452,10 @@ mdb_cursor_next(MDB_cursor *mc, MDB_val *key, MDB_val *data, MDB_cursor_op op)
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DPRINTF(("cursor_next: top page is %"Y"u in cursor %p",
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mdb_dbg_pgno(mp), (void *) mc));
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if (mc->mc_flags & C_DEL)
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if (mc->mc_flags & C_DEL) {
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mc->mc_flags ^= C_DEL;
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goto skip;
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}
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if (mc->mc_ki[mc->mc_top] + 1u >= NUMKEYS(mp)) {
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DPUTS("=====> move to next sibling page");
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@ -6523,6 +6541,8 @@ mdb_cursor_prev(MDB_cursor *mc, MDB_val *key, MDB_val *data, MDB_cursor_op op)
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DPRINTF(("cursor_prev: top page is %"Y"u in cursor %p",
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mdb_dbg_pgno(mp), (void *) mc));
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mc->mc_flags &= ~(C_EOF|C_DEL);
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if (mc->mc_ki[mc->mc_top] == 0) {
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DPUTS("=====> move to prev sibling page");
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if ((rc = mdb_cursor_sibling(mc, 0)) != MDB_SUCCESS) {
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@ -6977,6 +6997,30 @@ fetchm:
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}
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}
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break;
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case MDB_PREV_MULTIPLE:
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if (data == NULL) {
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rc = EINVAL;
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break;
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}
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if (!(mc->mc_db->md_flags & MDB_DUPFIXED)) {
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rc = MDB_INCOMPATIBLE;
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break;
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}
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if (!(mc->mc_flags & C_INITIALIZED))
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rc = mdb_cursor_last(mc, key, data);
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else
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rc = MDB_SUCCESS;
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if (rc == MDB_SUCCESS) {
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MDB_cursor *mx = &mc->mc_xcursor->mx_cursor;
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if (mx->mc_flags & C_INITIALIZED) {
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rc = mdb_cursor_sibling(mx, 0);
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if (rc == MDB_SUCCESS)
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goto fetchm;
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} else {
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rc = MDB_NOTFOUND;
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}
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}
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break;
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case MDB_NEXT:
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case MDB_NEXT_DUP:
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case MDB_NEXT_NODUP:
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@ -7518,7 +7562,7 @@ new_sub:
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*/
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if (do_sub) {
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int xflags, new_dupdata;
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size_t ecount;
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mdb_size_t ecount;
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put_sub:
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xdata.mv_size = 0;
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xdata.mv_data = "";
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@ -8233,7 +8277,7 @@ mdb_cursor_renew(MDB_txn *txn, MDB_cursor *mc)
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/* Return the count of duplicate data items for the current key */
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int
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mdb_cursor_count(MDB_cursor *mc, size_t *countp)
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mdb_cursor_count(MDB_cursor *mc, mdb_size_t *countp)
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{
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MDB_node *leaf;
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@ -9957,7 +10001,7 @@ mdb_env_copyfd0(MDB_env *env, HANDLE fd)
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MDB_txn *txn = NULL;
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mdb_mutexref_t wmutex = NULL;
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int rc;
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size_t wsize;
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mdb_size_t wsize, w3;
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char *ptr;
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#ifdef _WIN32
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DWORD len, w2;
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@ -10016,15 +10060,15 @@ mdb_env_copyfd0(MDB_env *env, HANDLE fd)
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if (rc)
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goto leave;
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w2 = txn->mt_next_pgno * env->me_psize;
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w3 = txn->mt_next_pgno * env->me_psize;
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{
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mdb_size_t fsize = 0;
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if ((rc = mdb_fsize(env->me_fd, &fsize)))
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goto leave;
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if (w2 > fsize)
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w2 = fsize;
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if (w3 > fsize)
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w3 = fsize;
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}
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wsize = w2 - wsize;
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wsize = w3 - wsize;
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while (wsize > 0) {
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if (wsize > MAX_WRITE)
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w2 = MAX_WRITE;
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@ -10093,7 +10137,7 @@ mdb_env_copy2(MDB_env *env, const char *path, unsigned int flags)
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#ifdef _WIN32
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rc = utf8_to_utf16(lpath, -1, &wpath, NULL);
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if (rc)
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return rc;
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goto leave;
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newfd = CreateFileW(wpath, GENERIC_WRITE, 0, NULL, CREATE_NEW,
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FILE_FLAG_NO_BUFFERING|FILE_FLAG_WRITE_THROUGH, NULL);
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free(wpath);
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