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mdbx: Merge branch 'devel'.

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This commit is contained in:
Leo Yuriev 2016-01-25 20:14:15 +03:00
commit d2f2d57f00
3 changed files with 15 additions and 11 deletions
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4
CHANGES
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@ -4,12 +4,16 @@ LMDB 0.9.18 Release Engineering
Add MDB_PREV_MULTIPLE
already done for mdbx - Fix robust mutex detection on glibc 2.10-11 (ITS#8330)
Fix page_search_root assert on FreeDB (ITS#8336)
Fix MDB_APPENDDUP vs. rewrite(single item) (ITS#8334)
n/a for mdbx - Fix mdb_copy of large files on Windows
Fix subcursor move after delete (ITS#8355)
n/a for mdbx - Check for utf8_to_utf16 failures (ITS#7992)
Catch strdup failure in mdb_dbi_open
Build
already done for mdbx - Additional makefile var tweaks (ITS#8169)
Documentation
Add Getting Started page
Update WRITEMAP description
LMDB 0.9.17 Release (2015/11/30)

6
lmdb.h
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@ -554,9 +554,11 @@ int mdb_env_create(MDB_env **env);
* allowed. LMDB will still modify the lock file - except on read-only
* filesystems, where LMDB does not use locks.
* <li>#MDB_WRITEMAP
* Use a writeable memory map unless MDB_RDONLY is set. This is faster
* and uses fewer mallocs, but loses protection from application bugs
* Use a writeable memory map unless MDB_RDONLY is set. This uses
* fewer mallocs but loses protection from application bugs
* like wild pointer writes and other bad updates into the database.
* This may be slightly faster for DBs that fit entirely in RAM, but
* is slower for DBs larger than RAM.
* Incompatible with nested transactions.
* Do not mix processes with and without MDB_WRITEMAP on the same
* environment. This can defeat durability (#mdb_env_sync etc).

16
mdb.c
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@ -4511,16 +4511,12 @@ static pthread_mutex_t mdb_rthc_lock = PTHREAD_MUTEX_INITIALIZER;
/* LY: TODO: Yet another problem is here - segfault in case if a DSO will
* be unloaded before a thread would been finished. */
static void
mdb_env_reader_destr(void *ptr)
static ATTRIBUTE_NO_SANITIZE_THREAD
void mdb_env_reader_destr(void *ptr)
{
struct MDB_rthc* rthc = ptr;
MDB_reader *reader;
if (! rthc)
/* LY: paranoia */
return;
mdb_ensure(NULL, pthread_mutex_lock(&mdb_rthc_lock) == 0);
reader = rthc->rc_reader;
if (reader && reader->mr_pid == getpid()) {
@ -5818,8 +5814,10 @@ mdb_cursor_next(MDB_cursor *mc, MDB_val *key, MDB_val *data, MDB_cursor_op op)
mdb_debug("cursor_next: top page is %zu in cursor %p",
mdb_dbg_pgno(mp), (void *) mc);
if (mc->mc_flags & C_DEL)
if (mc->mc_flags & C_DEL) {
mc->mc_flags ^= C_DEL;
goto skip;
}
if (mc->mc_ki[mc->mc_top] + 1u >= NUMKEYS(mp)) {
mdb_debug("=====> move to next sibling page");
@ -5898,6 +5896,8 @@ mdb_cursor_prev(MDB_cursor *mc, MDB_val *key, MDB_val *data, MDB_cursor_op op)
mdb_debug("cursor_prev: top page is %zu in cursor %p",
mdb_dbg_pgno(mp), (void *) mc);
mc->mc_flags &= ~(C_EOF|C_DEL);
if (mc->mc_ki[mc->mc_top] == 0) {
mdb_debug("=====> move to prev sibling page");
if ((rc = mdb_cursor_sibling(mc, 0)) != MDB_SUCCESS) {
@ -5909,8 +5909,6 @@ mdb_cursor_prev(MDB_cursor *mc, MDB_val *key, MDB_val *data, MDB_cursor_op op)
} else
mc->mc_ki[mc->mc_top]--;
mc->mc_flags &= ~C_EOF;
mdb_debug("==> cursor points to page %zu with %u keys, key index %u",
mdb_dbg_pgno(mp), NUMKEYS(mp), mc->mc_ki[mc->mc_top]);