mdbx: Merge branch 'devel'.

2025-01-21 21:48:21 +08:00 · 2016-06-16 23:48:48 +03:00 · 2016-06-16 23:48:48 +03:00 · d99e9f7377
commit d99e9f7377
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-Copyright 2011-2016 Howard Chu, Symas Corp.
+Copyright (c) 2015,2016 Leonid Yuriev <leo@yuriev.ru>.
 Copyright (c) 2015,2016 Peter-Service R&D LLC.
 This file is part of ReOpenMDBX.
 ReOpenMDBX is free software; you can redistribute it and/or modify it under
 the terms of the GNU Affero General Public License as published by
 the Free Software Foundation; either version 3 of the License, or
 (at your option) any later version.
 ReOpenMDBX is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 GNU Affero General Public License for more details.
 You should have received a copy of the GNU Affero General Public License
 along with this program.  If not, see <http://www.gnu.org/licenses/>.
 ---
 Copyright 2011-2014 Howard Chu, Symas Corp.
 All rights reserved.
 Redistribution and use in source and binary forms, with or without
--- a/664
+++ b/664
@ -1,3 +1,667 @@
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    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU Affero General Public License for more details.
    You should have received a copy of the GNU Affero General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
 Also add information on how to contact you by electronic and paper mail.
  If your software can interact with users remotely through a computer
 network, you should also make sure that it provides a way for users to
 get its source.  For example, if your program is a web application, its
 interface could display a "Source" link that leads users to an archive
 of the code.  There are many ways you could offer source, and different
 solutions will be better for different programs; see section 13 for the
 specific requirements.
  You should also get your employer (if you work as a programmer) or school,
 if any, to sign a "copyright disclaimer" for the program, if necessary.
 For more information on this, and how to apply and follow the GNU AGPL, see
 <http://www.gnu.org/licenses/>.
 ---
 The OpenLDAP Public License
  Version 2.8, 17 August 2003
--- a/101
+++ b/101
@ -1,4 +1,5 @@
-# GNU Makefile for libmdbx (lightning memory-mapped database library for Linux).
+# GNU Makefile for libmdbx (reliable lightning memory-mapped DB library for Linux).
 # https://github.com/ReOpen/libmdbx
 ########################################################################
 # Configuration. The compiler options must enable threaded compilation.
@ -6,58 +7,69 @@
 # Preprocessor macros (for XCFLAGS) of interest...
 # Note that the defaults should already be correct for most
 # platforms; you should not need to change any of these.
-# Read their descriptions in mdb.c if you do:
+# Read their descriptions in mdb.c if you do. There may be
 # other macros of interest. You should read mdb.c
 # before changing any of them.
 #
-# - MDB_USE_ROBUST
+
-#
+# install sandbox
-# There may be other macros in mdb.c of interest. You should
+SANDBOX	?=
-# read mdb.c before changing any of them.
+
-#
+# install prefixes (inside sandbox)
 DESTDIR	?=
 prefix	?= /usr/local
 mandir	?= $(prefix)/man
 # lib/bin suffix for multiarch/biarch, e.g. '.x86_64'
 suffix	?=
 CC	?= gcc
 XCFLAGS	?= -DNDEBUG=1 -DMDB_DEBUG=0
 CFLAGS	?= -O2 -g3 -Wall -Werror -Wextra
 CFLAGS	+= -pthread $(XCFLAGS)
 # LY: for ability to built with modern glibc,
 #     but then run with the old
 LDOPS	?= -Wl,--no-as-needed,-lrt
 # LY: just for benchmarking
 IOARENA ?= ../ioarena.git/@BUILD/src/ioarena
 ########################################################################
-IHDRS	:= lmdb.h mdbx.h
+HEADERS		:= lmdb.h mdbx.h
-ILIBS	:= libmdbx.a libmdbx.so
+LIBRARIES	:= libmdbx.a libmdbx.so
-IPROGS	:= mdbx_stat mdbx_copy mdbx_dump mdbx_load mdbx_chk
+TOOLS		:= mdbx_stat mdbx_copy mdbx_dump mdbx_load mdbx_chk
-IDOCS	:= mdb_stat.1 mdb_copy.1 mdb_dump.1 mdb_load.1
+MANPAGES	:= mdb_stat.1 mdb_copy.1 mdb_dump.1 mdb_load.1
-PROGS	:= $(IPROGS) mtest0 mtest1 mtest2 mtest3 mtest4 mtest5 mtest6 wbench
+TESTS		:= mtest0 mtest1 mtest2 mtest3 mtest4 mtest5 mtest6 wbench \
-PROGS   += yota_test1 yota_test2
+		   yota_test1 yota_test2
 SRC_LMDB	:= mdb.c midl.c lmdb.h midl.h reopen.h barriers.h
 SRC_MDBX	:= $(SRC_LMDB) mdbx.h
 .PHONY: mdbx lmdb all install clean check tests coverage
-all: $(ILIBS) $(IPROGS)
+all: $(LIBRARIES) $(TOOLS)
 mdbx: libmdbx.a libmdbx.so
 lmdb: liblmdb.a liblmdb.so
-install: $(ILIBS) $(IPROGS) $(IHDRS)
+tools: $(TOOLS)
-	mkdir -p $(DESTDIR)$(prefix)/bin \
+
-		&& cp -t $(DESTDIR)$(prefix)/bin $(IPROGS) && \
+install: $(LIBRARIES) $(TOOLS) $(HEADERS)
-	mkdir -p $(DESTDIR)$(prefix)/lib \
+	mkdir -p $(SANDBOX)$(prefix)/bin$(suffix) \
-		&& cp -t $(DESTDIR)$(prefix)/lib $(ILIBS) && \
+		&& cp -t $(SANDBOX)$(prefix)/bin$(suffix) $(TOOLS) && \
-	mkdir -p $(DESTDIR)$(prefix)/include \
+	mkdir -p $(SANDBOX)$(prefix)/lib$(suffix) \
-		&& cp -t $(DESTDIR)$(prefix)/include $(IHDRS) && \
+		&& cp -t $(SANDBOX)$(prefix)/lib$(suffix) $(LIBRARIES) && \
-	mkdir -p $(DESTDIR)$(mandir)/man1 \
+	mkdir -p $(SANDBOX)$(prefix)/include \
-		&& cp -t $(DESTDIR)$(mandir)/man1 $(IDOCS)
+		&& cp -t $(SANDBOX)$(prefix)/include $(HEADERS) && \
 	mkdir -p $(SANDBOX)$(mandir)/man1 \
 		&& cp -t $(SANDBOX)$(mandir)/man1 $(MANPAGES)
 clean:
-	rm -rf $(PROGS) @* *.[ao] *.[ls]o *~ testdb/* *.gcov
+	rm -rf $(TOOLS )$(TESTS) @* *.[ao] *.[ls]o *~ testdb/* *.gcov
-tests:	mdbx $(PROGS)
+tests:	$(TESTS)
 check:	tests
 	[ -d testdb ] || mkdir testdb && rm -f testdb/* \
@ -74,28 +86,28 @@ libmdbx.a:	mdbx.o
 	$(AR) rs $@ $^
 libmdbx.so:	mdbx.lo
-	$(CC) $(CFLAGS) $(LDFLAGS) -save-temps -pthread -shared -o $@ $^
+	$(CC) $(CFLAGS) $(LDFLAGS) -save-temps -pthread -shared $(LDOPS) -o $@ $^
 liblmdb.a:	lmdb.o
 	$(AR) rs $@ $^
 liblmdb.so:	lmdb.lo
-	$(CC) $(CFLAGS) $(LDFLAGS) -pthread -shared -o $@ $^
+	$(CC) $(CFLAGS) $(LDFLAGS) -pthread -shared $(LDOPS) -o $@ $^
 mdbx_stat: mdb_stat.o mdbx.o
-	$(CC) $(CFLAGS) $(LDFLAGS) -o $@ $^
+	$(CC) $(CFLAGS) $(LDFLAGS) $(LDOPS) -o $@ $^
 mdbx_copy: mdb_copy.o mdbx.o
-	$(CC) $(CFLAGS) $(LDFLAGS) -o $@ $^
+	$(CC) $(CFLAGS) $(LDFLAGS) $(LDOPS) -o $@ $^
 mdbx_dump: mdb_dump.o mdbx.o
-	$(CC) $(CFLAGS) $(LDFLAGS) -o $@ $^
+	$(CC) $(CFLAGS) $(LDFLAGS) $(LDOPS) -o $@ $^
 mdbx_load: mdb_load.o mdbx.o
-	$(CC) $(CFLAGS) $(LDFLAGS) -o $@ $^
+	$(CC) $(CFLAGS) $(LDFLAGS) $(LDOPS) -o $@ $^
 mdbx_chk: mdb_chk.o mdbx.o
-	$(CC) $(CFLAGS) $(LDFLAGS) -o $@ $^ -Wl,--no-as-needed,-lrt
+	$(CC) $(CFLAGS) $(LDFLAGS) $(LDOPS) -o $@ $^
 mtest0: mtest0.o mdbx.o
 	$(CC) $(CFLAGS) $(LDFLAGS) -o $@ $^
@ -125,13 +137,13 @@ yota_test2: yota_test2.o mdbx.o
 	$(CC) $(CFLAGS) $(LDFLAGS) -o $@ $^
 wbench:	wbench.o mdbx.o
-	$(CC) $(CFLAGS) $(LDFLAGS) -o $@ $^ -Wl,--no-as-needed,-lrt
+	$(CC) $(CFLAGS) $(LDFLAGS) -o $@ $^
 mdbx.o: $(SRC_MDBX)
-	$(CC) $(CFLAGS) -include mdbx.h -c mdb.c -o $@
+	$(CC) $(CFLAGS) -c mdbx.c -o $@
 mdbx.lo: $(SRC_MDBX)
-	$(CC) $(CFLAGS) -include mdbx.h -fPIC -c mdb.c -o $@
+	$(CC) $(CFLAGS) -fPIC -c mdbx.c -o $@
 lmdb.o: $(SRC_LMDB)
 	$(CC) $(CFLAGS) -c mdb.c -o $@
@ -145,14 +157,14 @@ lmdb.lo: $(SRC_LMDB)
 %.o:	%.c lmdb.h mdbx.h
 	$(CC) $(CFLAGS) -c $<
-COV_FLAGS=-fprofile-arcs -ftest-coverage
+COFLAGS	= -fprofile-arcs -ftest-coverage
@gcov-mdb.o: $(SRC_MDBX)
-	$(CC) $(CFLAGS) $(COV_FLAGS) -O0 -include mdbx.h -c mdb.c -o $@
+	$(CC) $(CFLAGS) $(COFLAGS) -O0 -c mdbx.c -o $@
 coverage: @gcov-mdb.o
 	for t in mtest*.c; do x=`basename \$$t .c`; $(MAKE) $$x.o; \
-		gcc -o @gcov-$$x $$x.o $^ -pthread $(COV_FLAGS); \
+		gcc -o @gcov-$$x $$x.o $^ -pthread $(COFLAGS); \
 		rm -rf testdb; mkdir testdb; ./@gcov-$$x; done
 	gcov @gcov-mdb
@ -185,3 +197,14 @@ $(eval $(call bench-rule,debug,10))
 bench: bench-lmdb.txt bench-mdbx.txt
 endif
 ci-rule = @( CC=$$(which $1); if [ -n "$$CC" ]; then \
 		CC=$$(readlink -f $$CC); echo -n "probe by $2 ($$CC): " && \
 		$(MAKE) clean >$1.log 2>$1.err && $(MAKE) all check 1>$1.log 2>$1.err && echo "OK" \
 			|| ( echo "FAILED"; cat $1.err >&2; exit 1 ); \
 	else echo "no $2 ($1) for probe"; fi; )
 ci:
 	$(call ci-rule,cc,default C compiler)
 	$(call ci-rule,gcc,GCC)
 	$(call ci-rule,clang,clang LLVM)
 	$(call ci-rule,icc,Intel C)
--- a/barriers.h
+++ b/barriers.h
@ -1,6 +1,27 @@
 /*
 * Copyright (c) 2015,2016 Leonid Yuriev <leo@yuriev.ru>.
 * Copyright (c) 2015,2016 Peter-Service R&D LLC.
 *
 * This file is part of ReOpenMDBX.
 *
 * ReOpenMDBX is free software; you can redistribute it and/or modify it under
 * the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation; either version 3 of the License, or
 * (at your option) any later version.
 *
 * ReOpenMDBX is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */
 /*****************************************************************************
 * Properly compiler/memory/coherence barriers
- * in the most portable way for ReOpenLDAP project.
+ * in the most portable way for ReOpenMDBX project.
 *
 * Feedback and comments are welcome.
 * https://gist.github.com/leo-yuriev/ba186a6bf5cf3a27bae7                   */
@ -136,4 +157,3 @@ static MDBX_INLINE void mdb_invalidate_cache(void *addr, int nbytes) {
 	(void) nbytes;
 #endif
 }
--- a/intro.doc
+++ b/intro.doc
@ -1,5 +1,25 @@
 /*
- * Copyright 2015-2016 Howard Chu, Symas Corp.
+ * Copyright (c) 2015,2016 Leonid Yuriev <leo@yuriev.ru>.
 * Copyright (c) 2015,2016 Peter-Service R&D LLC.
 *
 * This file is part of ReOpenMDBX.
 *
 * ReOpenMDBX is free software; you can redistribute it and/or modify it under
 * the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation; either version 3 of the License, or
 * (at your option) any later version.
 *
 * ReOpenMDBX is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 * ---
 *
 * Copyright 2015-2014 Howard Chu, Symas Corp.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
@ -10,6 +30,7 @@
 * top-level directory of the distribution or, alternatively, at
 * <http://www.OpenLDAP.org/license.html>.
 */
 /** @page starting Getting Started
 LMDB is compact, fast, powerful, and robust and implements a simplified
--- a/lmdb.h
+++ b/lmdb.h
@ -1,10 +1,10 @@
 /** @file lmdb.h
- *	@brief Lightning memory-mapped database library
+ *	@brief Reliable Lightning memory-mapped database library
 *
- *	@mainpage	Lightning Memory-Mapped Database Manager (LMDB)
+ *	@mainpage	Reliable Lightning Memory-Mapped Database Manager (MDBX)
 *
 *	@section intro_sec Introduction
- *	LMDB is a Btree-based database management library modeled loosely on the
+ *	MDBX is a Btree-based database management library modeled loosely on the
 *	BerkeleyDB API, but much simplified. The entire database is exposed
 *	in a memory map, and all data fetches return data directly
 *	from the mapped memory, so no malloc's or memcpy's occur during
@ -26,10 +26,10 @@
 *	readers, and readers don't block writers.
 *
 *	Unlike other well-known database mechanisms which use either write-ahead
- *	transaction logs or append-only data writes, LMDB requires no maintenance
+ *	transaction logs or append-only data writes, MDBX requires no maintenance
 *	during operation. Both write-ahead loggers and append-only databases
 *	require periodic checkpointing and/or compaction of their log or database
- *	files otherwise they grow without bound. LMDB tracks free pages within
+ *	files otherwise they grow without bound. MDBX tracks free pages within
 *	the database and re-uses them for new write operations, so the database
 *	size does not grow without bound in normal use.
 *
@ -44,7 +44,7 @@
 *	store, you may find the \ref starting page to be helpful.
 *
 *	@section caveats_sec Caveats
- *	Troubleshooting the lock file, plus semaphores on BSD systems:
+ *	Troubleshooting the lock file:
 *
 *	- A broken lockfile can cause sync issues.
 *	  Stale reader transactions left behind by an aborted program
@ -53,30 +53,15 @@
 *
 *	  Fix: Check for stale readers periodically, using the
 *	  #mdb_reader_check function or the \ref mdb_stat_1 "mdb_stat" tool.
- *	  Stale writers will be cleared automatically on most systems:
+ *	  Stale writers will be cleared automatically on Linux
- *	  - BSD, systems using SysV semaphores - automatic
+ *	  using POSIX mutexes with Robust option.
 *	  - Linux, systems using POSIX mutexes with Robust option - automatic
 *	  Otherwise just make all programs using the database close it;
 *	  the lockfile is always reset on first open of the environment.
 *
 *	- On BSD systems or others configured with MDB_USE_SYSV_SEM,
 *	  startup can fail due to semaphores owned by another userid.
 *
 *	  Fix: Open and close the database as the user which owns the
 *	  semaphores (likely last user) or as root, while no other
 *	  process is using the database.
 *
 *	Restrictions/caveats (in addition to those listed for some functions):
 *
- *	- Only the database owner should normally use the database on
+ *	- An MDBX configuration will often reserve considerable \b unused
 *	  BSD systems or when otherwise configured with MDB_USE_POSIX_SEM.
 *	  Multiple users can cause startup to fail later, as noted above.
 *
 *	- There is normally no pure read-only mode, since readers need write
 *	  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.
@ -97,7 +82,7 @@
 *
 *	- Use an MDB_env* in the process which opened it, without fork()ing.
 *
- *	- Do not have open an LMDB database twice in the same process at
+ *	- Do not have open an MDBX database twice in the same process at
 *	  the same time.  Not even from a plain open() call - close()ing it
 *	  breaks flock() advisory locking.
 *
@ -123,7 +108,7 @@
 *	- If you do that anyway, do a periodic check for stale readers. Or
 *	  close the environment once in a while, so the lockfile can get reset.
 *
- *	- Do not use LMDB databases on remote filesystems, even between
+ *	- Do not use MDBX databases on remote filesystems, even between
 *	  processes on the same host.  This breaks flock() on some OSes,
 *	  possibly memory map sync, and certainly sync between programs
 *	  on different hosts.
@ -131,9 +116,37 @@
 *	- Opening a database can fail if another process is opening or
 *	  closing it at exactly the same time.
 *
- *	@author	Howard Chu, Symas Corporation.
+ *	@author	Leonid Yuriev, 'ReOpen' initiative <https://github.com/ReOpen>.
 *	Howard Chu, Symas Corp. All rights reserved.
 *
- *	@copyright Copyright 2011-2016 Howard Chu, Symas Corp. All rights reserved.
+ *	@copyright 2015,2016 Leonid Yuriev <leo@yuriev.ru>.
 *	2011-2014 Howard Chu, Symas Corp. All rights reserved.
 *
 * ---
 *
 * Copyright (c) 2015,2016 Leonid Yuriev <leo@yuriev.ru>.
 * Copyright (c) 2015,2016 Peter-Service R&D LLC.
 *
 * This file is part of ReOpenMDBX.
 *
 * ReOpenMDBX is free software; you can redistribute it and/or modify it under
 * the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation; either version 3 of the License, or
 * (at your option) any later version.
 *
 * ReOpenMDBX is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 * ---
 *	@par Derived From:
 * This code is derived from LMDB engine written by Howard Chu, Symas Corporation.
 *
 * Copyright 2011-2014 Howard Chu, Symas Corp. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted only as authorized by the OpenLDAP
@ -160,6 +173,7 @@
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */
 #ifndef _LMDB_H_
 #define _LMDB_H_
@ -206,7 +220,7 @@ 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	"2016-04-06"
+#define MDB_VERSION_DATE	"2016-06-09"
 /** A stringifier for the version info */
 #define MDB_VERSTR(a,b,c,d)	"MDBX " #a "." #b "." #c ": (" d ", https://github.com/ReOpen/libmdbx)"
@ -300,7 +314,7 @@ typedef void (MDB_rel_func)(MDB_val *item, void *oldptr, void *newptr, void *rel
 	/** tie reader locktable slots to #MDB_txn objects instead of to threads */
 #define MDB_NOTLS		0x200000
 	/** don't do any locking, caller must manage their own locks
-	 * WARNING: MDBX and ReOpenLDAP don't support this mode. */
+	 * WARNING: ReOpenMDBX don't support this mode. */
 #define MDB_NOLOCK__UNSUPPORTED	0x400000
 	/** don't do readahead */
 #define MDB_NORDAHEAD	0x800000
--- a/mdb.c
+++ b/mdb.c
@ -4,8 +4,29 @@
 *	A Btree-based database management library modeled loosely on the
 *	BerkeleyDB API, but much simplified.
 */
 /*
- * Copyright 2011-2016 Howard Chu, Symas Corp.
+ * Copyright (c) 2015,2016 Leonid Yuriev <leo@yuriev.ru>.
 * Copyright (c) 2015,2016 Peter-Service R&D LLC.
 *
 * This file is part of ReOpenMDBX.
 *
 * ReOpenMDBX is free software; you can redistribute it and/or modify it under
 * the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation; either version 3 of the License, or
 * (at your option) any later version.
 *
 * ReOpenMDBX is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 * ---
 *
 * Copyright 2011-2014 Howard Chu, Symas Corp.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
@ -37,6 +58,36 @@
 #	define MDB_DEBUG 0
 #endif
 #ifndef _GNU_SOURCE
 #	define _GNU_SOURCE
 #endif
 /* LY: Please do not ask us for Windows support, just never!
 * But you can make a fork for Windows, or become maintainer for FreeBSD... */
 #ifndef __gnu_linux__
 #	warning "ReOpenMDBX supports only GNU Linux"
 #endif
 #include <features.h>
 #if !defined(__GNUC__) || !__GNUC_PREREQ(4,2)
 	/* LY: Actualy ReOpenMDBX was not tested with compilers
 	 *     older than GCC 4.4 (from RHEL6).
 	 * But you could remove this #error and try to continue at your own risk.
 	 * In such case please don't rise up an issues related ONLY to old compilers.
 	 */
 #	warning "ReOpenMDBX required at least GCC 4.2 compatible C/C++ compiler."
 #endif
 #if !defined(__GNU_LIBRARY__) || !__GLIBC_PREREQ(2,12)
 	/* LY: Actualy ReOpenMDBX was not tested with something
 	 *     older than glibc 2.12 (from RHEL6).
 	 * But you could remove this #error and try to continue at your own risk.
 	 * In such case please don't rise up an issues related ONLY to old systems.
 	 */
 #	warning "ReOpenMDBX required at least GLIBC 2.12."
 #endif
 #include "./reopen.h"
 #include "./barriers.h"
@ -108,6 +159,11 @@
 #	define MDBX_DBG_EXTRA	0
 #	define MDBX_DBG_AUDIT	0
 #	define MDBX_DBG_EDGE	0
 #	define mdb_runtime_flags 0
 #	define mdb_debug_logger ((void (*)(int, ...)) NULL)
 #	define MDBX_ONLY_FEATURE static
 #else
 #	define MDBX_ONLY_FEATURE
 #endif /* ! MDBX_MODE_ENABLED */
 #if (BYTE_ORDER == LITTLE_ENDIAN) == (BYTE_ORDER == BIG_ENDIAN)
@ -149,11 +205,8 @@
 #ifndef MDB_USE_ROBUST
 	/* Howard Chu: Android currently lacks Robust Mutex support */
 #	if defined(EOWNERDEAD) && !defined(ANDROID) \
-	/* LY: glibc before 2.10 has a troubles with Robust Mutex too.
+	/* LY: glibc before 2.10 has a troubles with Robust Mutex too. */ \
-	 * But more over:
+	&& __GLIBC_PREREQ(2,10)
 	 *  - we couldn't test code with glibc < 2.12;
 	 *  - we won't provide compatibility with old systems. */ \
 	&& !(defined(__GLIBC__) && ((__GLIBC__ << 16)|__GLIBC_MINOR__) < 0x02000c)
 #		define MDB_USE_ROBUST	1
 #	else
 #		define MDB_USE_ROBUST	0
@ -1146,28 +1199,8 @@ mdb_strerror(int err)
 }
 #if MDBX_MODE_ENABLED
-
+static txnid_t mdbx_oomkick(MDB_env *env, txnid_t oldest);
-int mdb_runtime_flags = MDBX_DBG_PRINT
+#endif /* MDBX_MODE_ENABLED */
 #if MDB_DEBUG
 		| MDBX_DBG_ASSERT
 #endif
 #if MDB_DEBUG > 1
 		| MDBX_DBG_TRACE
 #endif
 #if MDB_DEBUG > 2
 		| MDBX_DBG_AUDIT
 #endif
 #if MDB_DEBUG > 3
 		| MDBX_DBG_EXTRA
 #endif
 	;
 static MDBX_debug_func *mdb_debug_logger;
 #else /* MDBX_MODE_ENABLED */
 #	define mdb_runtime_flags 0
 #	define mdb_debug_logger ((void (*)(int, ...)) NULL)
 #endif /* ! MDBX_MODE_ENABLED */
 #if MDB_DEBUG
 	static txnid_t mdb_debug_edge;
@ -1205,24 +1238,6 @@ static MDBX_debug_func *mdb_debug_logger;
 		__assert_fail(msg, __FILE__, line, func)
 #endif /* MDB_DEBUG */
 #if MDBX_MODE_ENABLED
 int __cold
 mdbx_setup_debug(int flags, MDBX_debug_func* logger, long edge_txn) {
 	unsigned ret = mdb_runtime_flags;
 	if (flags != (int) MDBX_DBG_DNT)
 		mdb_runtime_flags = flags;
 	if (logger != (MDBX_debug_func*) MDBX_DBG_DNT)
 		mdb_debug_logger = logger;
 #if MDB_DEBUG
 	if (edge_txn != (long) MDBX_DBG_DNT)
 		mdb_debug_edge = edge_txn;
 #else
 	(void) edge_txn;
 #endif
 	return ret;
 }
 #endif /* MDBX_MODE_ENABLED */
 static void __cold
 mdb_debug_log(int type, const char *function, int line,
 					  const char *fmt, ...)
@ -1980,70 +1995,6 @@ txnid_t mdb_find_oldest(MDB_env *env, int *laggard)
 	return env->me_pgoldest = oldest;
 }
 static txnid_t __cold
 mdbx_oomkick(MDB_env *env, txnid_t oldest)
 {
 	mdb_debug("DB size maxed out");
 #if MDBX_MODE_ENABLED
 	int retry;
 	txnid_t snap;
 	mdb_debug("DB size maxed out");
 	for(retry = 0; ; ++retry) {
 		int reader;
 		if (mdb_reader_check(env, NULL))
 			break;
 		snap = mdb_find_oldest(env, &reader);
 		if (oldest < snap || reader < 0) {
 			if (retry && env->me_oom_func) {
 				/* LY: notify end of oom-loop */
 				env->me_oom_func(env, 0, 0, oldest, snap - oldest, -retry);
 			}
 			return snap;
 		}
 		MDB_reader *r;
 		pthread_t tid;
 		pid_t pid;
 		int rc;
 		if (!env->me_oom_func)
 			break;
 		r = &env->me_txns->mti_readers[ reader ];
 		pid = r->mr_pid;
 		tid = r->mr_tid;
 		if (r->mr_txnid != oldest || pid <= 0)
 			continue;
 		rc = env->me_oom_func(env, pid, (void*) tid, oldest,
 			mdb_meta_head_w(env)->mm_txnid - oldest, retry);
 		if (rc < 0)
 			break;
 		if (rc) {
 			r->mr_txnid = ~(txnid_t)0;
 			if (rc > 1) {
 				r->mr_tid = 0;
 				r->mr_pid = 0;
 				mdbx_coherent_barrier();
 			}
 		}
 	}
 	if (retry && env->me_oom_func) {
 		/* LY: notify end of oom-loop */
 		env->me_oom_func(env, 0, 0, oldest, 0, -retry);
 	}
 #else
 	(void) oldest;
 	(void) mdb_reader_check(env, NULL);
 #endif /* MDBX_MODE_ENABLED */
 	return mdb_find_oldest(env, NULL);
 }
 /** Add a page to the txn's dirty list */
 static void
 mdb_page_dirty(MDB_txn *txn, MDB_page *mp)
@ -2346,8 +2297,14 @@ mdb_page_alloc(MDB_cursor *mc, int num, MDB_page **mp, int flags)
 			}
 			if (rc == MDB_MAP_FULL) {
 #if MDBX_MODE_ENABLED
 				txnid_t snap = mdbx_oomkick(env, oldest);
 #else
 				mdb_debug("DB size maxed out");
 				txnid_t snap = mdb_find_oldest(env, NULL);
 #endif /* MDBX_MODE_ENABLED */
 				if (snap > oldest) {
 					oldest = snap;
 					continue;
 				}
 			}
@ -3997,21 +3954,6 @@ fail:
 	return rc;
 }
 #if MDBX_MODE_ENABLED
 int __cold
 mdbx_env_set_syncbytes(MDB_env *env, size_t bytes)
 {
 	if (unlikely(!env))
 		return EINVAL;
 	if(unlikely(env->me_signature != MDBX_ME_SIGNATURE))
 		return MDB_VERSION_MISMATCH;
 	env->me_sync_threshold = bytes;
 	return env->me_map ? mdb_env_sync(env, 0) : 0;
 }
 #endif /* MDBX_MODE_ENABLED */
 /** Read the environment parameters of a DB environment before
 * mapping it into memory.
 * @param[in] env the environment handle
@ -4815,17 +4757,27 @@ mdb_env_setup_locks(MDB_env *env, char *lpath, int mode, int *excl)
 		return errno;
 	if (*excl > 0) {
-		pthread_mutexattr_t mattr;
+		/* Solaris needs this before initing a robust mutex.  Otherwise
 		* it may skip the init and return EBUSY "seems someone already
 		* inited" or EINVAL "it was inited differently".
 		*/
 		memset(&env->me_txns->mti_rmutex, 0, sizeof(env->me_txns->mti_rmutex));
 		memset(&env->me_txns->mti_wmutex, 0, sizeof(env->me_txns->mti_wmutex));
 		pthread_mutexattr_t mattr;
 		rc = pthread_mutexattr_init(&mattr);
 		if (rc) return rc;
 		rc = pthread_mutexattr_setpshared(&mattr, PTHREAD_PROCESS_SHARED);
 		if ((rc = pthread_mutexattr_init(&mattr))
 			|| (rc = pthread_mutexattr_setpshared(&mattr, PTHREAD_PROCESS_SHARED))
 #if MDB_USE_ROBUST
-			|| (rc = pthread_mutexattr_setrobust(&mattr, PTHREAD_MUTEX_ROBUST))
+		if(! rc) rc = pthread_mutexattr_setrobust(&mattr, PTHREAD_MUTEX_ROBUST);
 #endif /* MDB_USE_ROBUST */
-			|| (rc = pthread_mutex_init(&env->me_txns->mti_rmutex, &mattr))
+		if (! rc) rc = pthread_mutex_init(&env->me_txns->mti_rmutex, &mattr);
-			|| (rc = pthread_mutex_init(&env->me_txns->mti_wmutex, &mattr)))
+		if (! rc) rc = pthread_mutex_init(&env->me_txns->mti_wmutex, &mattr);
-			return rc;
+
 		pthread_mutexattr_destroy(&mattr);
 		if (rc) return rc;
 		env->me_txns->mti_magic = MDB_MAGIC;
 		env->me_txns->mti_format = MDB_LOCK_FORMAT;
@ -4865,10 +4817,7 @@ mdb_env_setup_locks(MDB_env *env, char *lpath, int mode, int *excl)
 # error "Persistent DB flags & env flags overlap, but both go in mm_flags"
 #endif
-#if ! MDBX_MODE_ENABLED
+MDBX_ONLY_FEATURE int __cold
 static
 #endif /* ! MDBX_MODE_ENABLED */
 int __cold
 mdbx_env_open_ex(MDB_env *env, const char *path, unsigned flags, mode_t mode, int *exclusive)
 {
 	int		oflags, rc, len, excl = -1;
@ -5099,10 +5048,7 @@ mdb_env_close0(MDB_env *env)
 	}
 }
-#if ! MDBX_MODE_ENABLED
+MDBX_ONLY_FEATURE int __cold
 static
 #endif /* ! MDBX_MODE_ENABLED */
 int __cold
 mdbx_env_close_ex(MDB_env *env, int dont_sync)
 {
 	MDB_page *dp;
@ -9196,7 +9142,7 @@ mdb_env_cthr_toggle(mdb_copy *my, int st)
 static int __cold
 mdb_env_cwalk(mdb_copy *my, pgno_t *pg, int flags)
 {
-	MDB_cursor mc = {0};
+	MDB_cursor mc;
 	MDB_txn *txn = my->mc_txn;
 	MDB_node *ni;
 	MDB_page *mo, *mp, *leaf;
@ -9208,6 +9154,7 @@ mdb_env_cwalk(mdb_copy *my, pgno_t *pg, int flags)
 	if (*pg == P_INVALID)
 		return MDB_SUCCESS;
 	memset(&mc, 0, sizeof(mc));
 	mc.mc_snum = 1;
 	mc.mc_txn = txn;
@ -9713,10 +9660,7 @@ mdb_stat0(MDB_env *env, MDB_db *db, MDB_stat *arg)
 	return MDB_SUCCESS;
 }
-#if ! MDBX_MODE_ENABLED
+MDBX_ONLY_FEATURE int __cold
 static
 #endif /* ! MDBX_MODE_ENABLED */
 int __cold
 mdbx_env_stat(MDB_env *env, MDBX_stat *arg, size_t bytes)
 {
 	MDB_meta *meta;
@ -9736,10 +9680,7 @@ mdb_env_stat(MDB_env *env, MDB_stat *arg)
 	return mdbx_env_stat(env, (MDBX_stat *) arg, sizeof(MDB_stat));
 }
-#if ! MDBX_MODE_ENABLED
+MDBX_ONLY_FEATURE int __cold
 static
 #endif /* ! MDBX_MODE_ENABLED */
 int __cold
 mdbx_env_info(MDB_env *env, MDBX_envinfo *arg, size_t bytes)
 {
 	MDB_meta *meta;
@ -9951,10 +9892,7 @@ int mdb_dbi_open(MDB_txn *txn, const char *name, unsigned flags, MDB_dbi *dbi)
 	return rc;
 }
-#if ! MDBX_MODE_ENABLED
+MDBX_ONLY_FEATURE int __cold
 static
 #endif
 int __cold
 mdbx_stat(MDB_txn *txn, MDB_dbi dbi, MDBX_stat *arg, size_t bytes)
 {
 	if (unlikely(!arg || !txn))
@ -10459,184 +10397,6 @@ static void mdb_mutex_unlock(MDB_env *env, pthread_mutex_t *mutex) {
 	(void) rc;
 }
 #if MDBX_MODE_ENABLED
 void __cold
 mdbx_env_set_oomfunc(MDB_env *env, MDBX_oom_func *oomfunc)
 {
 	if (likely(env && env->me_signature == MDBX_ME_SIGNATURE))
 		env->me_oom_func = oomfunc;
 }
 MDBX_oom_func* __cold
 mdbx_env_get_oomfunc(MDB_env *env)
 {
 	return likely(env && env->me_signature == MDBX_ME_SIGNATURE)
 		? env->me_oom_func : NULL;
 }
 struct mdb_walk_ctx {
 	MDB_txn *mw_txn;
 	void *mw_user;
 	MDBX_pgvisitor_func *mw_visitor;
 };
 typedef struct mdb_walk_ctx mdb_walk_ctx_t;
 /** Depth-first tree traversal. */
 static int __cold
 mdb_env_walk(mdb_walk_ctx_t *ctx, const char* dbi, pgno_t pg, int flags, int deep)
 {
 	MDB_page *mp;
 	int rc, i, nkeys;
 	unsigned header_size, unused_size, payload_size, align_bytes;
 	const char* type;
 	if (pg == P_INVALID)
 		return MDB_CORRUPTED;
 	rc = mdb_page_get(ctx->mw_txn, pg, &mp, NULL);
 	if (rc)
 		return rc;
 	if (pg != mp->mp_p.p_pgno)
 		return MDB_CORRUPTED;
 	nkeys = NUMKEYS(mp);
 	header_size = IS_LEAF2(mp) ? PAGEHDRSZ : PAGEBASE + mp->mp_lower;
 	unused_size = SIZELEFT(mp);
 	payload_size = 0;
 	/* LY: Don't use mask here, e.g bitwise (P_BRANCH|P_LEAF|P_LEAF2|P_META|P_OVERFLOW|P_SUBP).
 	 * Pages should not me marked dirty/loose or otherwise. */
 	switch (mp->mp_flags) {
 	case P_BRANCH:
 		type = "branch";
 		if (nkeys < 1)
 			return MDB_CORRUPTED;
 		break;
 	case P_LEAF:
 		type = "leaf";
 		break;
 	case P_LEAF|P_SUBP:
 		type = "dupsort-subleaf";
 		break;
 	case P_LEAF|P_LEAF2:
 		type = "dupfixed-leaf";
 		break;
 	case P_LEAF|P_LEAF2|P_SUBP:
 		type = "dupsort-dupfixed-subleaf";
 		break;
 	case P_META:
 	case P_OVERFLOW:
 	default:
 		return MDB_CORRUPTED;
 	}
 	for (align_bytes = i = 0; i < nkeys;
 		 align_bytes += ((payload_size + align_bytes) & 1), i++) {
 		MDB_node *node;
 		if (IS_LEAF2(mp)) {
 			/* LEAF2 pages have no mp_ptrs[] or node headers */
 			payload_size += mp->mp_ksize;
 			continue;
 		}
 		node = NODEPTR(mp, i);
 		payload_size += NODESIZE + node->mn_ksize;
 		if (IS_BRANCH(mp)) {
 			rc = mdb_env_walk(ctx, dbi, NODEPGNO(node), flags, deep);
 			if (rc)
 				return rc;
 			continue;
 		}
 		assert(IS_LEAF(mp));
 		if (node->mn_ksize < 1)
 			return MDB_CORRUPTED;
 		if (node->mn_flags & F_BIGDATA) {
 			MDB_page *omp;
 			pgno_t *opg;
 			size_t over_header, over_payload, over_unused;
 			payload_size += sizeof(pgno_t);
 			opg = NODEDATA(node);
 			rc = mdb_page_get(ctx->mw_txn, *opg, &omp, NULL);
 			if (rc)
 				return rc;
 			if (*opg != omp->mp_p.p_pgno)
 				return MDB_CORRUPTED;
 			/* LY: Don't use mask here, e.g bitwise (P_BRANCH|P_LEAF|P_LEAF2|P_META|P_OVERFLOW|P_SUBP).
 			 * Pages should not me marked dirty/loose or otherwise. */
 			if (P_OVERFLOW != omp->mp_flags)
 				return MDB_CORRUPTED;
 			over_header = PAGEHDRSZ;
 			over_payload = NODEDSZ(node);
 			over_unused = omp->mp_pages * ctx->mw_txn->mt_env->me_psize
 					- over_payload - over_header;
 			rc = ctx->mw_visitor(*opg, omp->mp_pages, ctx->mw_user, dbi,
 					"overflow-data", 1, over_payload, over_header, over_unused);
 			if (rc)
 				return rc;
 			continue;
 		}
 		payload_size += NODEDSZ(node);
 		if (node->mn_flags & F_SUBDATA) {
 			MDB_db *db = NODEDATA(node);
 			char* name = NULL;
 			if (NODEDSZ(node) < 1)
 				return MDB_CORRUPTED;
 			if (! (node->mn_flags & F_DUPDATA)) {
 				name = NODEKEY(node);
 				int namelen = (char*) db - name;
 				name = memcpy(alloca(namelen + 1), name, namelen);
 				name[namelen] = 0;
 			}
 			rc = mdb_env_walk(ctx, (name && name[0]) ? name : dbi,
 					db->md_root, node->mn_flags & F_DUPDATA, deep + 1);
 			if (rc)
 				return rc;
 		}
 	}
 	return ctx->mw_visitor(mp->mp_p.p_pgno, 1, ctx->mw_user, dbi, type,
 		nkeys, payload_size, header_size, unused_size + align_bytes);
 }
 int __cold
 mdbx_env_pgwalk(MDB_txn *txn, MDBX_pgvisitor_func* visitor, void* user)
 {
 	mdb_walk_ctx_t ctx;
 	int rc;
 	if (unlikely(!txn))
 		return MDB_BAD_TXN;
 	if (unlikely(txn->mt_signature != MDBX_MT_SIGNATURE))
 		return MDB_VERSION_MISMATCH;
 	ctx.mw_txn = txn;
 	ctx.mw_user = user;
 	ctx.mw_visitor = visitor;
 	rc = visitor(0, 2, user, "lmdb", "meta", 2, sizeof(MDB_meta)*2, PAGEHDRSZ*2,
 				 (txn->mt_env->me_psize - sizeof(MDB_meta) - PAGEHDRSZ) *2);
 	if (! rc && txn->mt_dbs[FREE_DBI].md_root != P_INVALID)
 		rc = mdb_env_walk(&ctx, "free", txn->mt_dbs[FREE_DBI].md_root, 0, 0);
 	if (! rc && txn->mt_dbs[MAIN_DBI].md_root != P_INVALID)
 		rc = mdb_env_walk(&ctx, "main", txn->mt_dbs[MAIN_DBI].md_root, 0, 0);
 	if (! rc)
 		rc = visitor(P_INVALID, 0, user, NULL, NULL, 0, 0, 0, 0);
 	return rc;
 }
 #endif /* MDBX_MODE_ENABLED */
 /** @} */
 #include "./midl.c"
--- a/mdb_chk.c
+++ b/mdb_chk.c
@ -1,23 +1,26 @@
 /*
 	Copyright (c) 2015,2016 Leonid Yuriev <leo@yuriev.ru>.
 	Copyright (c) 2015,2016 Peter-Service R&D LLC.
 	This file is part of ReOpenLDAP.
 	ReOpenLDAP is free software; you can redistribute it and/or modify it under
 	the terms of the GNU Affero General Public License as published by
 	the Free Software Foundation; either version 3 of the License, or
 	(at your option) any later version.
 	ReOpenLDAP is distributed in the hope that it will be useful,
 	but WITHOUT ANY WARRANTY; without even the implied warranty of
 	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 	GNU Affero General Public License for more details.
 	You should have received a copy of the GNU Affero General Public License
 	along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 /* mdbx_chk.c - memory-mapped database check tool */
 /*
 * Copyright (c) 2015,2016 Leonid Yuriev <leo@yuriev.ru>.
 * Copyright (c) 2015,2016 Peter-Service R&D LLC.
 *
 * This file is part of ReOpenMDBX.
 *
 * ReOpenMDBX is free software; you can redistribute it and/or modify it under
 * the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation; either version 3 of the License, or
 * (at your option) any later version.
 *
 * ReOpenMDBX is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */
 #include <stdio.h>
 #include <errno.h>
 #include <stdlib.h>
--- a/mdb_copy.1
+++ b/mdb_copy.1
@ -1,6 +1,26 @@
-.TH MDB_COPY 1 "2014/06/20" "LMDB 0.9.14"
+.\" Copyright (c) 2015,2016 Leonid Yuriev <leo@yuriev.ru>.
-.\" Copyright 2012-2016 Howard Chu, Symas Corp. All Rights Reserved.
+.\" Copyright (c) 2015,2016 Peter-Service R&D LLC <http://billing.ru/>.
 .\"
 .\" This file is part of ReOpenMDBX.
 .\"
 .\" ReOpenMDBX is free software; you can redistribute it and/or modify it under
 .\" the terms of the GNU Affero General Public License as published by
 .\" the Free Software Foundation; either version 3 of the License, or
 .\" (at your option) any later version.
 .\"
 .\" ReOpenMDBX is distributed in the hope that it will be useful,
 .\" but WITHOUT ANY WARRANTY; without even the implied warranty of
 .\" MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 .\" GNU Affero General Public License for more details.
 .\"
 .\" You should have received a copy of the GNU Affero General Public License
 .\" along with this program.  If not, see <http://www.gnu.org/licenses/>.
 .\"
 .\" ---
 .\"
 .\" Copyright 2012-2014 Howard Chu, Symas Corp. All Rights Reserved.
 .\" Copying restrictions apply.  See COPYRIGHT/LICENSE.
 .TH MDB_COPY 1 "2014/06/20" "LMDB 0.9.14"
 .SH NAME
 mdb_copy \- LMDB environment copy tool
 .SH SYNOPSIS
--- a/mdb_copy.c
+++ b/mdb_copy.c
@ -1,6 +1,27 @@
 /* mdb_copy.c - memory-mapped database backup tool */
 /*
- * Copyright 2012-2016 Howard Chu, Symas Corp.
+ * Copyright (c) 2015,2016 Leonid Yuriev <leo@yuriev.ru>.
 * Copyright (c) 2015,2016 Peter-Service R&D LLC.
 *
 * This file is part of ReOpenMDBX.
 *
 * ReOpenMDBX is free software; you can redistribute it and/or modify it under
 * the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation; either version 3 of the License, or
 * (at your option) any later version.
 *
 * ReOpenMDBX is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 * ---
 *
 * Copyright 2012-2014 Howard Chu, Symas Corp.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
@ -11,6 +32,7 @@
 * top-level directory of the distribution or, alternatively, at
 * <http://www.OpenLDAP.org/license.html>.
 */
 #include <stdio.h>
 #include <stdlib.h>
 #include <signal.h>
--- a/mdb_dump.1
+++ b/mdb_dump.1
@ -1,6 +1,26 @@
-.TH MDB_DUMP 1 "2014/06/20" "LMDB 0.9.14"
+.\" Copyright (c) 2015,2016 Leonid Yuriev <leo@yuriev.ru>.
-.\" Copyright 2014-2016 Howard Chu, Symas Corp. All Rights Reserved.
+.\" Copyright (c) 2015,2016 Peter-Service R&D LLC <http://billing.ru/>.
 .\"
 .\" This file is part of ReOpenMDBX.
 .\"
 .\" ReOpenMDBX is free software; you can redistribute it and/or modify it under
 .\" the terms of the GNU Affero General Public License as published by
 .\" the Free Software Foundation; either version 3 of the License, or
 .\" (at your option) any later version.
 .\"
 .\" ReOpenMDBX is distributed in the hope that it will be useful,
 .\" but WITHOUT ANY WARRANTY; without even the implied warranty of
 .\" MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 .\" GNU Affero General Public License for more details.
 .\"
 .\" You should have received a copy of the GNU Affero General Public License
 .\" along with this program.  If not, see <http://www.gnu.org/licenses/>.
 .\"
 .\" ---
 .\"
 .\" Copyright 2014 Howard Chu, Symas Corp. All Rights Reserved.
 .\" Copying restrictions apply.  See COPYRIGHT/LICENSE.
 .TH MDB_DUMP 1 "2014/06/20" "LMDB 0.9.14"
 .SH NAME
 mdb_dump \- LMDB environment export tool
 .SH SYNOPSIS
--- a/mdb_dump.c
+++ b/mdb_dump.c
@ -1,6 +1,27 @@
 /* mdb_dump.c - memory-mapped database dump tool */
 /*
- * Copyright 2011-2016 Howard Chu, Symas Corp.
+ * Copyright (c) 2015,2016 Leonid Yuriev <leo@yuriev.ru>.
 * Copyright (c) 2015,2016 Peter-Service R&D LLC.
 *
 * This file is part of ReOpenMDBX.
 *
 * ReOpenMDBX is free software; you can redistribute it and/or modify it under
 * the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation; either version 3 of the License, or
 * (at your option) any later version.
 *
 * ReOpenMDBX is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 * ---
 *
 * Copyright 2011-2014 Howard Chu, Symas Corp.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
@ -11,6 +32,7 @@
 * top-level directory of the distribution or, alternatively, at
 * <http://www.OpenLDAP.org/license.html>.
 */
 #include <stdio.h>
 #include <errno.h>
 #include <stdlib.h>
--- a/mdb_load.c
+++ b/mdb_load.c
@ -1,6 +1,27 @@
 /* mdb_load.c - memory-mapped database load tool */
 /*
- * Copyright 2011-2016 Howard Chu, Symas Corp.
+ * Copyright (c) 2015,2016 Leonid Yuriev <leo@yuriev.ru>.
 * Copyright (c) 2015,2016 Peter-Service R&D LLC.
 *
 * This file is part of ReOpenMDBX.
 *
 * ReOpenMDBX is free software; you can redistribute it and/or modify it under
 * the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation; either version 3 of the License, or
 * (at your option) any later version.
 *
 * ReOpenMDBX is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 * ---
 *
 * Copyright 2011-2014 Howard Chu, Symas Corp.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
@ -11,6 +32,7 @@
 * top-level directory of the distribution or, alternatively, at
 * <http://www.OpenLDAP.org/license.html>.
 */
 #include <stdio.h>
 #include <stdlib.h>
 #include <errno.h>
--- a/mdb_stat.1
+++ b/mdb_stat.1
@ -1,6 +1,26 @@
-.TH MDB_STAT 1 "2014/06/20" "LMDB 0.9.14"
+.\" Copyright (c) 2015,2016 Leonid Yuriev <leo@yuriev.ru>.
-.\" Copyright 2012-2016 Howard Chu, Symas Corp. All Rights Reserved.
+.\" Copyright (c) 2015,2016 Peter-Service R&D LLC <http://billing.ru/>.
 .\"
 .\" This file is part of ReOpenMDBX.
 .\"
 .\" ReOpenMDBX is free software; you can redistribute it and/or modify it under
 .\" the terms of the GNU Affero General Public License as published by
 .\" the Free Software Foundation; either version 3 of the License, or
 .\" (at your option) any later version.
 .\"
 .\" ReOpenMDBX is distributed in the hope that it will be useful,
 .\" but WITHOUT ANY WARRANTY; without even the implied warranty of
 .\" MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 .\" GNU Affero General Public License for more details.
 .\"
 .\" You should have received a copy of the GNU Affero General Public License
 .\" along with this program.  If not, see <http://www.gnu.org/licenses/>.
 .\"
 .\" ---
 .\"
 .\" Copyright 2012-2014 Howard Chu, Symas Corp. All Rights Reserved.
 .\" Copying restrictions apply.  See COPYRIGHT/LICENSE.
 .TH MDB_STAT 1 "2014/06/20" "LMDB 0.9.14"
 .SH NAME
 mdb_stat \- LMDB environment status tool
 .SH SYNOPSIS
--- a/mdb_stat.c
+++ b/mdb_stat.c
@ -1,6 +1,27 @@
 /* mdb_stat.c - memory-mapped database status tool */
 /*
- * Copyright 2011-2016 Howard Chu, Symas Corp.
+ * Copyright (c) 2015,2016 Leonid Yuriev <leo@yuriev.ru>.
 * Copyright (c) 2015,2016 Peter-Service R&D LLC.
 *
 * This file is part of ReOpenMDBX.
 *
 * ReOpenMDBX is free software; you can redistribute it and/or modify it under
 * the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation; either version 3 of the License, or
 * (at your option) any later version.
 *
 * ReOpenMDBX is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 * ---
 *
 * Copyright 2011-2014 Howard Chu, Symas Corp.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
@ -11,6 +32,7 @@
 * top-level directory of the distribution or, alternatively, at
 * <http://www.OpenLDAP.org/license.html>.
 */
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
--- a/mdbx.c
+++ b/mdbx.c
@ -0,0 +1,310 @@
 /*
 * Copyright (c) 2015,2016 Leonid Yuriev <leo@yuriev.ru>.
 * Copyright (c) 2015,2016 Peter-Service R&D LLC.
 *
 * This file is part of ReOpenMDBX.
 *
 * ReOpenMDBX is free software; you can redistribute it and/or modify it under
 * the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation; either version 3 of the License, or
 * (at your option) any later version.
 *
 * ReOpenMDBX is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */
 #include "mdbx.h"
 int mdb_runtime_flags = MDBX_DBG_PRINT
 #if MDB_DEBUG
 		| MDBX_DBG_ASSERT
 #endif
 #if MDB_DEBUG > 1
 		| MDBX_DBG_TRACE
 #endif
 #if MDB_DEBUG > 2
 		| MDBX_DBG_AUDIT
 #endif
 #if MDB_DEBUG > 3
 		| MDBX_DBG_EXTRA
 #endif
 	;
 static MDBX_debug_func *mdb_debug_logger;
 int mdbx_setup_debug(int flags, MDBX_debug_func* logger, long edge_txn);
 #include "mdb.c"
 int __cold
 mdbx_setup_debug(int flags, MDBX_debug_func* logger, long edge_txn) {
 	unsigned ret = mdb_runtime_flags;
 	if (flags != (int) MDBX_DBG_DNT)
 		mdb_runtime_flags = flags;
 	if (logger != (MDBX_debug_func*) MDBX_DBG_DNT)
 		mdb_debug_logger = logger;
 #if MDB_DEBUG
 	if (edge_txn != (long) MDBX_DBG_DNT)
 		mdb_debug_edge = edge_txn;
 #else
 	(void) edge_txn;
 #endif
 	return ret;
 }
 static txnid_t __cold
 mdbx_oomkick(MDB_env *env, txnid_t oldest)
 {
 	mdb_debug("DB size maxed out");
 #if MDBX_MODE_ENABLED
 	int retry;
 	txnid_t snap;
 	mdb_debug("DB size maxed out");
 	for(retry = 0; ; ++retry) {
 		int reader;
 		if (mdb_reader_check(env, NULL))
 			break;
 		snap = mdb_find_oldest(env, &reader);
 		if (oldest < snap || reader < 0) {
 			if (retry && env->me_oom_func) {
 				/* LY: notify end of oom-loop */
 				env->me_oom_func(env, 0, 0, oldest, snap - oldest, -retry);
 			}
 			return snap;
 		}
 		MDB_reader *r;
 		pthread_t tid;
 		pid_t pid;
 		int rc;
 		if (!env->me_oom_func)
 			break;
 		r = &env->me_txns->mti_readers[ reader ];
 		pid = r->mr_pid;
 		tid = r->mr_tid;
 		if (r->mr_txnid != oldest || pid <= 0)
 			continue;
 		rc = env->me_oom_func(env, pid, (void*) tid, oldest,
 			mdb_meta_head_w(env)->mm_txnid - oldest, retry);
 		if (rc < 0)
 			break;
 		if (rc) {
 			r->mr_txnid = ~(txnid_t)0;
 			if (rc > 1) {
 				r->mr_tid = 0;
 				r->mr_pid = 0;
 				mdbx_coherent_barrier();
 			}
 		}
 	}
 	if (retry && env->me_oom_func) {
 		/* LY: notify end of oom-loop */
 		env->me_oom_func(env, 0, 0, oldest, 0, -retry);
 	}
 #else
 	(void) oldest;
 	(void) mdb_reader_check(env, NULL);
 #endif /* MDBX_MODE_ENABLED */
 	return mdb_find_oldest(env, NULL);
 }
 int __cold
 mdbx_env_set_syncbytes(MDB_env *env, size_t bytes)
 {
 	if (unlikely(!env))
 		return EINVAL;
 	if(unlikely(env->me_signature != MDBX_ME_SIGNATURE))
 		return MDB_VERSION_MISMATCH;
 	env->me_sync_threshold = bytes;
 	return env->me_map ? mdb_env_sync(env, 0) : 0;
 }
 void __cold
 mdbx_env_set_oomfunc(MDB_env *env, MDBX_oom_func *oomfunc)
 {
 	if (likely(env && env->me_signature == MDBX_ME_SIGNATURE))
 		env->me_oom_func = oomfunc;
 }
 MDBX_oom_func* __cold
 mdbx_env_get_oomfunc(MDB_env *env)
 {
 	return likely(env && env->me_signature == MDBX_ME_SIGNATURE)
 		? env->me_oom_func : NULL;
 }
 struct mdb_walk_ctx {
 	MDB_txn *mw_txn;
 	void *mw_user;
 	MDBX_pgvisitor_func *mw_visitor;
 };
 typedef struct mdb_walk_ctx mdb_walk_ctx_t;
 /** Depth-first tree traversal. */
 static int __cold
 mdb_env_walk(mdb_walk_ctx_t *ctx, const char* dbi, pgno_t pg, int flags, int deep)
 {
 	MDB_page *mp;
 	int rc, i, nkeys;
 	unsigned header_size, unused_size, payload_size, align_bytes;
 	const char* type;
 	if (pg == P_INVALID)
 		return MDB_CORRUPTED;
 	rc = mdb_page_get(ctx->mw_txn, pg, &mp, NULL);
 	if (rc)
 		return rc;
 	if (pg != mp->mp_p.p_pgno)
 		return MDB_CORRUPTED;
 	nkeys = NUMKEYS(mp);
 	header_size = IS_LEAF2(mp) ? PAGEHDRSZ : PAGEBASE + mp->mp_lower;
 	unused_size = SIZELEFT(mp);
 	payload_size = 0;
 	/* LY: Don't use mask here, e.g bitwise (P_BRANCH|P_LEAF|P_LEAF2|P_META|P_OVERFLOW|P_SUBP).
 	 * Pages should not me marked dirty/loose or otherwise. */
 	switch (mp->mp_flags) {
 	case P_BRANCH:
 		type = "branch";
 		if (nkeys < 1)
 			return MDB_CORRUPTED;
 		break;
 	case P_LEAF:
 		type = "leaf";
 		break;
 	case P_LEAF|P_SUBP:
 		type = "dupsort-subleaf";
 		break;
 	case P_LEAF|P_LEAF2:
 		type = "dupfixed-leaf";
 		break;
 	case P_LEAF|P_LEAF2|P_SUBP:
 		type = "dupsort-dupfixed-subleaf";
 		break;
 	case P_META:
 	case P_OVERFLOW:
 	default:
 		return MDB_CORRUPTED;
 	}
 	for (align_bytes = i = 0; i < nkeys;
 		 align_bytes += ((payload_size + align_bytes) & 1), i++) {
 		MDB_node *node;
 		if (IS_LEAF2(mp)) {
 			/* LEAF2 pages have no mp_ptrs[] or node headers */
 			payload_size += mp->mp_ksize;
 			continue;
 		}
 		node = NODEPTR(mp, i);
 		payload_size += NODESIZE + node->mn_ksize;
 		if (IS_BRANCH(mp)) {
 			rc = mdb_env_walk(ctx, dbi, NODEPGNO(node), flags, deep);
 			if (rc)
 				return rc;
 			continue;
 		}
 		assert(IS_LEAF(mp));
 		if (node->mn_ksize < 1)
 			return MDB_CORRUPTED;
 		if (node->mn_flags & F_BIGDATA) {
 			MDB_page *omp;
 			pgno_t *opg;
 			size_t over_header, over_payload, over_unused;
 			payload_size += sizeof(pgno_t);
 			opg = NODEDATA(node);
 			rc = mdb_page_get(ctx->mw_txn, *opg, &omp, NULL);
 			if (rc)
 				return rc;
 			if (*opg != omp->mp_p.p_pgno)
 				return MDB_CORRUPTED;
 			/* LY: Don't use mask here, e.g bitwise (P_BRANCH|P_LEAF|P_LEAF2|P_META|P_OVERFLOW|P_SUBP).
 			 * Pages should not me marked dirty/loose or otherwise. */
 			if (P_OVERFLOW != omp->mp_flags)
 				return MDB_CORRUPTED;
 			over_header = PAGEHDRSZ;
 			over_payload = NODEDSZ(node);
 			over_unused = omp->mp_pages * ctx->mw_txn->mt_env->me_psize
 					- over_payload - over_header;
 			rc = ctx->mw_visitor(*opg, omp->mp_pages, ctx->mw_user, dbi,
 					"overflow-data", 1, over_payload, over_header, over_unused);
 			if (rc)
 				return rc;
 			continue;
 		}
 		payload_size += NODEDSZ(node);
 		if (node->mn_flags & F_SUBDATA) {
 			MDB_db *db = NODEDATA(node);
 			char* name = NULL;
 			if (NODEDSZ(node) < 1)
 				return MDB_CORRUPTED;
 			if (! (node->mn_flags & F_DUPDATA)) {
 				name = NODEKEY(node);
 				int namelen = (char*) db - name;
 				name = memcpy(alloca(namelen + 1), name, namelen);
 				name[namelen] = 0;
 			}
 			rc = mdb_env_walk(ctx, (name && name[0]) ? name : dbi,
 					db->md_root, node->mn_flags & F_DUPDATA, deep + 1);
 			if (rc)
 				return rc;
 		}
 	}
 	return ctx->mw_visitor(mp->mp_p.p_pgno, 1, ctx->mw_user, dbi, type,
 		nkeys, payload_size, header_size, unused_size + align_bytes);
 }
 int __cold
 mdbx_env_pgwalk(MDB_txn *txn, MDBX_pgvisitor_func* visitor, void* user)
 {
 	mdb_walk_ctx_t ctx;
 	int rc;
 	if (unlikely(!txn))
 		return MDB_BAD_TXN;
 	if (unlikely(txn->mt_signature != MDBX_MT_SIGNATURE))
 		return MDB_VERSION_MISMATCH;
 	ctx.mw_txn = txn;
 	ctx.mw_user = user;
 	ctx.mw_visitor = visitor;
 	rc = visitor(0, 2, user, "lmdb", "meta", 2, sizeof(MDB_meta)*2, PAGEHDRSZ*2,
 				 (txn->mt_env->me_psize - sizeof(MDB_meta) - PAGEHDRSZ) *2);
 	if (! rc && txn->mt_dbs[FREE_DBI].md_root != P_INVALID)
 		rc = mdb_env_walk(&ctx, "free", txn->mt_dbs[FREE_DBI].md_root, 0, 0);
 	if (! rc && txn->mt_dbs[MAIN_DBI].md_root != P_INVALID)
 		rc = mdb_env_walk(&ctx, "main", txn->mt_dbs[MAIN_DBI].md_root, 0, 0);
 	if (! rc)
 		rc = visitor(P_INVALID, 0, user, NULL, NULL, 0, 0, 0, 0);
 	return rc;
 }
--- a/mdbx.h
+++ b/mdbx.h
@ -1,22 +1,23 @@
 /*
-	Copyright (c) 2015,2016 Leonid Yuriev <leo@yuriev.ru>.
+ * Copyright (c) 2015,2016 Leonid Yuriev <leo@yuriev.ru>.
-	Copyright (c) 2015,2016 Peter-Service R&D LLC.
+ * Copyright (c) 2015,2016 Peter-Service R&D LLC.
-
+ *
-	This file is part of ReOpenLDAP.
+ * This file is part of ReOpenMDBX.
-
+ *
-	ReOpenLDAP is free software; you can redistribute it and/or modify it under
+ * ReOpenMDBX is free software; you can redistribute it and/or modify it under
-	the terms of the GNU Affero General Public License as published by
+ * the terms of the GNU Affero General Public License as published by
-	the Free Software Foundation; either version 3 of the License, or
+ * the Free Software Foundation; either version 3 of the License, or
-	(at your option) any later version.
+ * (at your option) any later version.
-
+ *
-	ReOpenLDAP is distributed in the hope that it will be useful,
+ * ReOpenMDBX is distributed in the hope that it will be useful,
-	but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-	GNU Affero General Public License for more details.
+ * GNU Affero General Public License for more details.
-
+ *
-	You should have received a copy of the GNU Affero General Public License
+ * You should have received a copy of the GNU Affero General Public License
-	along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
-*/
+ *
 */
 /*
 	This is solution to provide flexible compatibility with the original liblmdb.
--- a/midl.c
+++ b/midl.c
@ -1,9 +1,28 @@
 /**	@file midl.c
 *	@brief ldap bdb back-end ID List functions */
-/* $OpenLDAP$ */
+
-/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
+/*
 * Copyright (c) 2015,2016 Leonid Yuriev <leo@yuriev.ru>.
 * Copyright (c) 2015,2016 Peter-Service R&D LLC.
 *
- * Copyright 2000-2016 The OpenLDAP Foundation.
+ * This file is part of ReOpenMDBX.
 *
 * ReOpenMDBX is free software; you can redistribute it and/or modify it under
 * the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation; either version 3 of the License, or
 * (at your option) any later version.
 *
 * ReOpenMDBX is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 * ---
 *
 * Copyright 2000-2014 The OpenLDAP Foundation.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
--- a/midl.h
+++ b/midl.h
@ -8,10 +8,29 @@
 *	This file is only used internally in libmdb and its definitions
 *	are not exposed publicly.
 */
-/* $OpenLDAP$ */
+
-/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
+/*
 * Copyright (c) 2015,2016 Leonid Yuriev <leo@yuriev.ru>.
 * Copyright (c) 2015,2016 Peter-Service R&D LLC.
 *
- * Copyright 2000-2016 The OpenLDAP Foundation.
+ * This file is part of ReOpenMDBX.
 *
 * ReOpenMDBX is free software; you can redistribute it and/or modify it under
 * the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation; either version 3 of the License, or
 * (at your option) any later version.
 *
 * ReOpenMDBX is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 * ---
 *
 * Copyright 2000-2014 The OpenLDAP Foundation.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
--- a/mtest0.c
+++ b/mtest0.c
@ -1,6 +1,26 @@
 /* mtest.c - memory-mapped database tester/toy */
 /*
- * Copyright 2011-2016 Howard Chu, Symas Corp.
+ * Copyright (c) 2015,2016 Leonid Yuriev <leo@yuriev.ru>.
 * Copyright (c) 2015,2016 Peter-Service R&D LLC.
 *
 * This file is part of ReOpenMDBX.
 *
 * ReOpenMDBX is free software; you can redistribute it and/or modify it under
 * the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation; either version 3 of the License, or
 * (at your option) any later version.
 *
 * ReOpenMDBX is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 *
 * Copyright 2011-2014 Howard Chu, Symas Corp.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
@ -11,6 +31,7 @@
 * top-level directory of the distribution or, alternatively, at
 * <http://www.OpenLDAP.org/license.html>.
 */
 #include <stdio.h>
 #include <stdlib.h>
 #include <time.h>
--- a/mtest1.c
+++ b/mtest1.c
@ -1,22 +1,23 @@
 /*
-	Copyright (c) 2015,2016 Leonid Yuriev <leo@yuriev.ru>.
+ * Copyright (c) 2015,2016 Leonid Yuriev <leo@yuriev.ru>.
-	Copyright (c) 2015,2016 Peter-Service R&D LLC.
+ * Copyright (c) 2015,2016 Peter-Service R&D LLC.
-
+ *
-	This file is part of ReOpenLDAP.
+ * This file is part of ReOpenMDBX.
-
+ *
-	ReOpenLDAP is free software; you can redistribute it and/or modify it under
+ * ReOpenMDBX is free software; you can redistribute it and/or modify it under
-	the terms of the GNU Affero General Public License as published by
+ * the terms of the GNU Affero General Public License as published by
-	the Free Software Foundation; either version 3 of the License, or
+ * the Free Software Foundation; either version 3 of the License, or
-	(at your option) any later version.
+ * (at your option) any later version.
-
+ *
-	ReOpenLDAP is distributed in the hope that it will be useful,
+ * ReOpenMDBX is distributed in the hope that it will be useful,
-	but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-	GNU Affero General Public License for more details.
+ * GNU Affero General Public License for more details.
-
+ *
-	You should have received a copy of the GNU Affero General Public License
+ * You should have received a copy of the GNU Affero General Public License
-	along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
-*/
+ *
 */
 /* Based on mtest2.c - memory-mapped database tester/toy */
--- a/mtest2.c
+++ b/mtest2.c
@ -1,6 +1,27 @@
 /* mtest2.c - memory-mapped database tester/toy */
 /*
- * Copyright 2011-2016 Howard Chu, Symas Corp.
+ * Copyright (c) 2015,2016 Leonid Yuriev <leo@yuriev.ru>.
 * Copyright (c) 2015,2016 Peter-Service R&D LLC.
 *
 * This file is part of ReOpenMDBX.
 *
 * ReOpenMDBX is free software; you can redistribute it and/or modify it under
 * the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation; either version 3 of the License, or
 * (at your option) any later version.
 *
 * ReOpenMDBX is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 * ---
 *
 * Copyright 2011-2014 Howard Chu, Symas Corp.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
--- a/mtest3.c
+++ b/mtest3.c
@ -1,6 +1,27 @@
 /* mtest3.c - memory-mapped database tester/toy */
 /*
- * Copyright 2011-2016 Howard Chu, Symas Corp.
+ * Copyright (c) 2015,2016 Leonid Yuriev <leo@yuriev.ru>.
 * Copyright (c) 2015,2016 Peter-Service R&D LLC.
 *
 * This file is part of ReOpenMDBX.
 *
 * ReOpenMDBX is free software; you can redistribute it and/or modify it under
 * the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation; either version 3 of the License, or
 * (at your option) any later version.
 *
 * ReOpenMDBX is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 * ---
 *
 * Copyright 2011-2014 Howard Chu, Symas Corp.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
--- a/mtest4.c
+++ b/mtest4.c
@ -1,6 +1,27 @@
 /* mtest4.c - memory-mapped database tester/toy */
 /*
- * Copyright 2011-2016 Howard Chu, Symas Corp.
+ * Copyright (c) 2015,2016 Leonid Yuriev <leo@yuriev.ru>.
 * Copyright (c) 2015,2016 Peter-Service R&D LLC.
 *
 * This file is part of ReOpenMDBX.
 *
 * ReOpenMDBX is free software; you can redistribute it and/or modify it under
 * the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation; either version 3 of the License, or
 * (at your option) any later version.
 *
 * ReOpenMDBX is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 * ---
 *
 * Copyright 2011-2014 Howard Chu, Symas Corp.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
--- a/mtest5.c
+++ b/mtest5.c
@ -1,6 +1,27 @@
 /* mtest5.c - memory-mapped database tester/toy */
 /*
- * Copyright 2011-2016 Howard Chu, Symas Corp.
+ * Copyright (c) 2015,2016 Leonid Yuriev <leo@yuriev.ru>.
 * Copyright (c) 2015,2016 Peter-Service R&D LLC.
 *
 * This file is part of ReOpenMDBX.
 *
 * ReOpenMDBX is free software; you can redistribute it and/or modify it under
 * the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation; either version 3 of the License, or
 * (at your option) any later version.
 *
 * ReOpenMDBX is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 * ---
 *
 * Copyright 2011-2014 Howard Chu, Symas Corp.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
--- a/mtest6.c
+++ b/mtest6.c
@ -1,6 +1,27 @@
 /* mtest6.c - memory-mapped database tester/toy */
 /*
- * Copyright 2011-2016 Howard Chu, Symas Corp.
+ * Copyright (c) 2015,2016 Leonid Yuriev <leo@yuriev.ru>.
 * Copyright (c) 2015,2016 Peter-Service R&D LLC.
 *
 * This file is part of ReOpenMDBX.
 *
 * ReOpenMDBX is free software; you can redistribute it and/or modify it under
 * the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation; either version 3 of the License, or
 * (at your option) any later version.
 *
 * ReOpenMDBX is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 * ---
 *
 * Copyright 2011-2014 Howard Chu, Symas Corp.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
--- a/reopen.h
+++ b/reopen.h
@ -1,44 +1,40 @@
 /*
-    Copyright (c) 2015,2016 Leonid Yuriev <leo@yuriev.ru>.
+ * Copyright (c) 2015,2016 Leonid Yuriev <leo@yuriev.ru>.
-    Copyright (c) 2015,2016 Peter-Service R&D LLC.
+ * Copyright (c) 2015,2016 Peter-Service R&D LLC.
-
+ *
-    This file is part of ReOpenLDAP.
+ * This file is part of ReOpenMDBX.
-
+ *
-    ReOpenLDAP is free software; you can redistribute it and/or modify it under
+ * ReOpenMDBX is free software; you can redistribute it and/or modify it under
-    the terms of the GNU Affero General Public License as published by
+ * the terms of the GNU Affero General Public License as published by
-    the Free Software Foundation; either version 3 of the License, or
+ * the Free Software Foundation; either version 3 of the License, or
-    (at your option) any later version.
+ * (at your option) any later version.
-
+ *
-    ReOpenLDAP is distributed in the hope that it will be useful,
+ * ReOpenMDBX is distributed in the hope that it will be useful,
-    but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-    GNU Affero General Public License for more details.
+ * GNU Affero General Public License for more details.
-
+ *
-    You should have received a copy of the GNU Affero General Public License
+ * You should have received a copy of the GNU Affero General Public License
-    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
-*/
+ *
-
+ */
 /* LY: Please do not ask us for Windows support, just never!
 * But you can make a fork for Windows, or become maintainer for FreeBSD... */
 #ifndef __gnu_linux__
 #	error "ReOpenLDAP branch supports only GNU Linux"
 #endif
 #ifndef _REOPEN_H
 #define _REOPEN_H
-#ifndef _GNU_SOURCE
+#ifndef __CLANG_PREREQ
-#	define _GNU_SOURCE
+#	ifdef __clang__
-#endif
+#		define __CLANG_PREREQ(maj,min) \
 			((__clang_major__ << 16) + __clang_minor__ >= ((maj) << 16) + (min))
 #	else
 #		define __CLANG_PREREQ(maj,min) (0)
 #	endif
 #endif /* __CLANG_PREREQ */
 #ifndef __has_attribute
 #	define __has_attribute(x) (0)
 #endif
 #if !defined(GCC_VERSION) && defined(__GNUC__)
 #	define GCC_VERSION (__GNUC__ * 1000 + __GNUC_MINOR__)
 #endif /* GCC_VERSION */
 #if !defined(__thread) && (defined(_MSC_VER) || defined(__DMC__))
 #	define __thread __declspec(thread)
 #endif
--- a/sample-bdb.txt
+++ b/sample-bdb.txt
@ -2,8 +2,29 @@
 *
 * Do a line-by-line comparison of this and sample-mdb.txt
 */
 /*
- * Copyright 2012-2016 Howard Chu, Symas Corp.
+ * Copyright (c) 2015,2016 Leonid Yuriev <leo@yuriev.ru>.
 * Copyright (c) 2015,2016 Peter-Service R&D LLC.
 *
 * This file is part of ReOpenMDBX.
 *
 * ReOpenMDBX is free software; you can redistribute it and/or modify it under
 * the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation; either version 3 of the License, or
 * (at your option) any later version.
 *
 * ReOpenMDBX is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 * ---
 *
 * Copyright 2012-2014 Howard Chu, Symas Corp.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
@ -14,6 +35,7 @@
 * top-level directory of the distribution or, alternatively, at
 * <http://www.OpenLDAP.org/license.html>.
 */
 #include <stdio.h>
 #include <string.h>
 #include <db.h>
--- a/sample-mdb.txt
+++ b/sample-mdb.txt
@ -2,8 +2,29 @@
 *
 * Do a line-by-line comparison of this and sample-bdb.txt
 */
 /*
- * Copyright 2012-2016 Howard Chu, Symas Corp.
+ * Copyright (c) 2015,2016 Leonid Yuriev <leo@yuriev.ru>.
 * Copyright (c) 2015,2016 Peter-Service R&D LLC.
 *
 * This file is part of ReOpenMDBX.
 *
 * ReOpenMDBX is free software; you can redistribute it and/or modify it under
 * the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation; either version 3 of the License, or
 * (at your option) any later version.
 *
 * ReOpenMDBX is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 * ---
 *
 * Copyright 2012-2014 Howard Chu, Symas Corp.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
@ -14,6 +35,7 @@
 * top-level directory of the distribution or, alternatively, at
 * <http://www.OpenLDAP.org/license.html>.
 */
 #include <stdio.h>
 #include "lmdb.h"
--- a/27
+++ b/27
@ -1,27 +0,0 @@
 <tagfile>
  <compound kind="page">
    <name>mdb_copy_1</name>
 	<title>mdb_copy - environment copy tool</title>
 	<filename>mdb_copy.1</filename>
  </compound>
  <compound kind="page">
    <name>mdb_dump_1</name>
 	<title>mdb_dump - environment export tool</title>
 	<filename>mdb_dump.1</filename>
  </compound>
  <compound kind="page">
    <name>mdb_load_1</name>
 	<title>mdb_load - environment import tool</title>
 	<filename>mdb_load.1</filename>
  </compound>
  <compound kind="page">
    <name>mdb_stat_1</name>
 	<title>mdb_stat - environment status tool</title>
 	<filename>mdb_stat.1</filename>
  </compound>
  <compound kind="page">
    <name>mdb_chk_1</name>
 	<title>mdb_chk - environment check tool</title>
 	<filename>mdb_chk.1</filename>
  </compound>
 </tagfile>
--- a/wbench.c
+++ b/wbench.c
@ -1,22 +1,24 @@
 /*
-	Copyright (c) 2015,2016 Leonid Yuriev <leo@yuriev.ru>.
+ * Copyright (c) 2015,2016 Leonid Yuriev <leo@yuriev.ru>.
-	Copyright (c) 2015,2016 Peter-Service R&D LLC.
+ * Copyright (c) 2015,2016 Peter-Service R&D LLC.
 *
 * This file is part of ReOpenMDBX.
 *
 * ReOpenMDBX is free software; you can redistribute it and/or modify it under
 * the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation; either version 3 of the License, or
 * (at your option) any later version.
 *
 * ReOpenMDBX is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */
 	This file is part of ReOpenLDAP.
 	ReOpenLDAP is free software; you can redistribute it and/or modify it under
 	the terms of the GNU Affero General Public License as published by
 	the Free Software Foundation; either version 3 of the License, or
 	(at your option) any later version.
 	ReOpenLDAP is distributed in the hope that it will be useful,
 	but WITHOUT ANY WARRANTY; without even the implied warranty of
 	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 	GNU Affero General Public License for more details.
 	You should have received a copy of the GNU Affero General Public License
 	along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 #include <stdio.h>
 #include <stdlib.h>
 #include <time.h>
--- a/yota_test1.c
+++ b/yota_test1.c
@ -1,3 +1,24 @@
 /*
 * Copyright (c) 2016 Leonid Yuriev <leo@yuriev.ru>.
 * Copyright (c) 2015 Vladimir Romanov <https://www.linkedin.com/in/vladimirromanov>, Yota Lab.
 *
 * This file is part of ReOpenMDBX.
 *
 * ReOpenMDBX is free software; you can redistribute it and/or modify it under
 * the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation; either version 3 of the License, or
 * (at your option) any later version.
 *
 * ReOpenMDBX is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */
 #include <sys/time.h>
 #include <sys/stat.h>
--- a/yota_test2.c
+++ b/yota_test2.c
@ -1,3 +1,24 @@
 /*
 * Copyright (c) 2016 Leonid Yuriev <leo@yuriev.ru>.
 * Copyright (c) 2015 Vladimir Romanov <https://www.linkedin.com/in/vladimirromanov>, Yota Lab.
 *
 * This file is part of ReOpenMDBX.
 *
 * ReOpenMDBX is free software; you can redistribute it and/or modify it under
 * the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation; either version 3 of the License, or
 * (at your option) any later version.
 *
 * ReOpenMDBX is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */
 #include <sys/time.h>
 #include <sys/stat.h>