Merge remote-tracking branch 'origin/mdb.RE/0.9'

libraries/liblmdb/CHANGES

 LMDB 0.9 Change Log
 
-LMDB 0.9.19 Release Engineering
+LMDB 0.9.19 Release (2016/12/28)
 	Fix mdb_env_cwalk cursor init (ITS#8424)
 	Fix robust mutexes on Solaris 10/11 (ITS#8339)
 	Tweak Win32 error message buffer
@@ -8,6 +8,20 @@ LMDB 0.9.19 Release Engineering
 	Optimize mdb_drop
 	Fix xcursors after mdb_cursor_del (ITS#8406)
 	Fix MDB_NEXT_DUP after mdb_cursor_del (ITS#8412)
+	Fix mdb_cursor_put resetting C_EOF (ITS#8489)
+	Fix mdb_env_copyfd2 to return EPIPE on SIGPIPE (ITS#8504)
+	Fix mdb_env_copy with empty DB (ITS#8209)
+	Fix behaviors with fork (ITS#8505)
+	Fix mdb_dbi_open with mainDB cursors (ITS#8542)
+	Fix robust mutexes on kFreeBSD (ITS#8554)
+	Fix utf8_to_utf16 error checks (ITS#7992)
+	Fix F_NOCACHE on MacOS, error is non-fatal (ITS#7682)
+	Build
+		Make shared lib suffix overridable (ITS#8481)
+	Documentation
+		Cleanup doxygen nits
+		Note reserved vs actual mem/disk usage
+
 
 LMDB 0.9.18 Release (2016/02/05)
 	Fix robust mutex detection on glibc 2.10-11 (ITS#8330)

libraries/liblmdb/Doxyfile

@@ -253,7 +253,7 @@ IDL_PROPERTY_SUPPORT   = YES
 # member in the group (if any) for the other members of the group. By default
 # all members of a group must be documented explicitly.
 
-DISTRIBUTE_GROUP_DOC   = NO
+DISTRIBUTE_GROUP_DOC   = YES
 
 # Set the SUBGROUPING tag to YES (the default) to allow class member groups of
 # the same type (for instance a group of public functions) to be put as a

libraries/liblmdb/Makefile

@@ -26,6 +26,7 @@ OPT = -O2 -g
 CFLAGS	= $(THREADS) $(OPT) $(W) $(XCFLAGS)
 LDLIBS	=
 SOLIBS	=
+SOEXT	= .so
 prefix	= /usr/local
 exec_prefix = $(prefix)
 bindir = $(exec_prefix)/bin
@@ -37,7 +38,7 @@ mandir = $(datarootdir)/man
 ########################################################################
 
 IHDRS	= lmdb.h
-ILIBS	= liblmdb.a liblmdb.so
+ILIBS	= liblmdb.a liblmdb$(SOEXT)
 IPROGS	= mdb_stat mdb_copy mdb_dump mdb_load
 IDOCS	= mdb_stat.1 mdb_copy.1 mdb_dump.1 mdb_load.1
 PROGS	= $(IPROGS) mtest mtest2 mtest3 mtest4 mtest5
@@ -63,7 +64,7 @@ test:	all
 liblmdb.a:	mdb.o midl.o
 	$(AR) rs $@ mdb.o midl.o
 
-liblmdb.so:	mdb.lo midl.lo
+liblmdb$(SOEXT):	mdb.lo midl.lo
 #	$(CC) $(LDFLAGS) -pthread -shared -Wl,-Bsymbolic -o $@ mdb.o midl.o $(SOLIBS)
 	$(CC) $(LDFLAGS) -pthread -shared -o $@ mdb.lo midl.lo $(SOLIBS)
 

libraries/liblmdb/lmdb.h

@@ -77,6 +77,11 @@
  *	  access to locks and lock file. Exceptions: On read-only filesystems
  *	  or with the #MDB_NOLOCK flag described under #mdb_env_open().
  *
+ *	- An LMDB configuration will often reserve considerable \b unused
+ *	  memory address space and maybe file size for future growth.
+ *	  This does not use actual memory or disk space, but users may need
+ *	  to understand the difference so they won't be scared off.
+ *
  *	- By default, in versions before 0.9.10, unused portions of the data
  *	  file might receive garbage data from memory freed by other code.
  *	  (This does not happen when using the #MDB_WRITEMAP flag.) As of
@@ -91,11 +96,12 @@
  *	  transactions.  Each transaction belongs to one thread.  See below.
  *	  The #MDB_NOTLS flag changes this for read-only transactions.
  *
- *	- Use an MDB_env* in the process which opened it, without fork()ing.
+ *	- Use an MDB_env* in the process which opened it, not after fork().
  *
  *	- Do not have open an LMDB database twice in the same process at
  *	  the same time.  Not even from a plain open() call - close()ing it
- *	  breaks flock() advisory locking.
+ *	  breaks fcntl() advisory locking.  (It is OK to reopen it after
+ *	  fork() - exec*(), since the lockfile has FD_CLOEXEC set.)
  *
  *	- Avoid long-lived transactions.  Read transactions prevent
  *	  reuse of pages freed by newer write transactions, thus the
@@ -194,7 +200,7 @@ typedef int mdb_filehandle_t;
 /** Library minor version */
 #define MDB_VERSION_MINOR	9
 /** Library patch version */
-#define MDB_VERSION_PATCH	18
+#define MDB_VERSION_PATCH	19
 
 /** Combine args a,b,c into a single integer for easy version comparisons */
 #define MDB_VERINT(a,b,c)	(((a) << 24) | ((b) << 16) | (c))
@@ -204,7 +210,7 @@ typedef int mdb_filehandle_t;
 	MDB_VERINT(MDB_VERSION_MAJOR,MDB_VERSION_MINOR,MDB_VERSION_PATCH)
 
 /** The release date of this library version */
-#define MDB_VERSION_DATE	"February 5, 2016"
+#define MDB_VERSION_DATE	"December 28, 2016"
 
 /** A stringifier for the version info */
 #define MDB_VERSTR(a,b,c,d)	"LMDB " #a "." #b "." #c ": (" d ")"
@@ -383,7 +389,9 @@ typedef enum MDB_cursor_op {
 	MDB_PREV_NODUP,			/**< Position at last data item of previous key */
 	MDB_SET,				/**< Position at specified key */
 	MDB_SET_KEY,			/**< Position at specified key, return key + data */
-	MDB_SET_RANGE			/**< Position at first key greater than or equal to specified key. */
+	MDB_SET_RANGE,			/**< Position at first key greater than or equal to specified key. */
+	MDB_PREV_MULTIPLE		/**< Position at previous page and return key and up to
+								a page of duplicate data items. Only for #MDB_DUPFIXED */
 } MDB_cursor_op;
 
 /** @defgroup  errors	Return Codes
@@ -672,6 +680,7 @@ int  mdb_env_copyfd(MDB_env *env, mdb_filehandle_t fd);
 	 *	<li>#MDB_CP_COMPACT - Perform compaction while copying: omit free
 	 *		pages and sequentially renumber all pages in output. This option
 	 *		consumes more CPU and runs more slowly than the default.
+	 *		Currently it fails if the environment has suffered a page leak.
 	 * </ul>
 	 * @return A non-zero error value on failure and 0 on success.
 	 */
@@ -786,6 +795,10 @@ int  mdb_env_get_flags(MDB_env *env, unsigned int *flags);
 int  mdb_env_get_path(MDB_env *env, const char **path);
 
 	/** @brief Return the filedescriptor for the given environment.
+	 *
+	 * This function may be called after fork(), so the descriptor can be
+	 * closed before exec*().  Other LMDB file descriptors have FD_CLOEXEC.
+	 * (Until LMDB 0.9.18, only the lockfile had that.)
 	 *
 	 * @param[in] env An environment handle returned by #mdb_env_create()
 	 * @param[out] fd Address of a mdb_filehandle_t to contain the descriptor.
@@ -1090,8 +1103,9 @@ int  mdb_txn_renew(MDB_txn *txn);
 	 *		This flag may only be used in combination with #MDB_DUPSORT. This option
 	 *		tells the library that the data items for this database are all the same
 	 *		size, which allows further optimizations in storage and retrieval. When
-	 *		all data items are the same size, the #MDB_GET_MULTIPLE and #MDB_NEXT_MULTIPLE
-	 *		cursor operations may be used to retrieve multiple items at once.
+	 *		all data items are the same size, the #MDB_GET_MULTIPLE, #MDB_NEXT_MULTIPLE
+	 *		and #MDB_PREV_MULTIPLE cursor operations may be used to retrieve multiple
+	 *		items at once.
 	 *	<li>#MDB_INTEGERDUP
 	 *		This option specifies that duplicate data items are binary integers,
 	 *		similar to #MDB_INTEGERKEY keys.

libraries/liblmdb/mdb_copy.1

@@ -36,6 +36,7 @@ Write the library version number to the standard output, and exit.
 Compact while copying. Only current data pages will be copied; freed
 or unused pages will be omitted from the copy. This option will
 slow down the backup process as it is more CPU-intensive.
+Currently it fails if the environment has suffered a page leak.
 .TP
 .BR \-n
 Open LDMB environment(s) which do not use subdirectories.