_        ___  ____ ____  ____
  |_|_ _   / _ \/ ___/ ___||  _ \   _ __ ___  _ __ ___
  _|_||_| | | | \___ \___ \| |_) | | '_ ` _ \| '_ ` _ \
 |_||_|_| | |_| |___) |__) |  __/  | | | | | | | | | | |
  |_|_|_|  \___/|____/____/|_|     |_| |_| |_|_| |_| |_|

 OSSP mm - Shared Memory Allocation

 ChangeLog
 =========

 Changes between 1.4.1 and 1.4.2 (10-Aug-2006 to 15-Aug-2006)

  *) Remove a trailing whitespace in mm.pod which
     confused pod2html(1) and generated bad output.
     [Neil Conway <neilc@samurai.com>]

 Changes between 1.4.0 and 1.4.1 (02-Sep-2005 to 10-Aug-2006)

  *) Add new API function MM_reset() and mm_reset().
     [Neil Conway <neilc@samurai.com>]

  *) Upgraded build environment to GNU shtool 2.0.6,
     GNU libtool 1.5.22 and GNU autoconf 2.60.
     [Ralf S. Engelschall]

  *) Fix spelling errors in manual page mm(3) and corrected
     description of mm_sizeof() function.
     [Neil Conway <neilc@samurai.com>]

 Changes between 1.3.1 and 1.4.0 (12-Sep-2003 to 02-Sep-2005)

  *) Optimize insertion of free memory chunks by merging with
     the spare area if possible to decrease memory fragmentation.
     [<gennadyd@yahoo.com>]

  *) Fix mm_realloc() function: If the memory chunk passed to mm_realloc()
     can't be extended and a new chunk must be allocated, the old memory
     is copied into the new chunk with a call to memcpy(3). However, the
     used size is the length of the new data and will cause memcpy(3) to
     access memory beyond the old data chunk's boundaries.
     [Kirk Petersen <kirk.petersen@watchguard.com>]

  *) Upgraded build environment to GNU Libtool 1.5.20 and GNU shtool 2.0.2
     [Ralf S. Engelschall]
  
  *) Updated all copyright messages for year 2005.
     [Ralf S. Engelschall]

 Changes between 1.3.0 and 1.3.1 (07-Mar-2003 to 12-Sep-2004)

  *) Upgraded build environment to GNU Shtool 2.0.1,
     GNU Libtool 1.5.8 and Autoconf 2.59.
     [Ralf S. Engelschall]

 Changes between 1.2.2 and 1.3.0 (23-Dec-2002 to 07-Mar-2003)

  *) Correctly cleanup under MM_SHMT_MMZERO in case of a shared
     memory segment creation error.
     [Ralf S. Engelschall]

  *) Close the filedescriptor of the underlying object immediately
     after mmap(2)'ing it in case of MM_SHMT_MMPOSX, MM_SHMT_MMZERO
     and MM_SHMT_MMFILE.
     [Ralf S. Engelschall, Joe Orton <jorton@redhat.com>]

 Changes between 1.2.1 and 1.2.2 (28-Jul-2002 to 23-Dec-2002)

  *) Stripped trailing whitespaces from all files in source tree.
     [Ralf S. Engelschall]

  *) Upgraded build environment to GNU Shtool 1.6.2, Libtool 1.4.3
     and Autoconf 2.57.
     [Ralf S. Engelschall]

  *) Use "close-on-exec" semantic on internal file descriptors if
     underlying platform supports this feature. This makes sure the file
     descriptors are closed by the kernel upon execution of exec(3) by
     the application.
     [Ralf S. Engelschall, Martin Kraemer <Martin.Kraemer@Fujitsu-Siemens.com>]

  *) Fixed Makefile.in: $(TRUE) was not defined.
     [Will Day <wd@hpgx.net>]

  *) Updated all copyright messages with forthcoming year 2003,
     added OSSP project as secondary copyright holder, added standard
     OSSP ASCII-art logo to documents, etc.
     [Ralf S. Engelschall]

 Changes between 1.2.0 and 1.2.1 (26-Jul-2002 to 28-Jul-2002)

  *) Fixed the package rolling: configure.ac was missing because
     of a bug in devtool.conf.
     [Kean Johnston <jkj@armory.com>]

 Changes between 1.1.3 and 1.2.0 (01-Jul-2000 to 26-Jul-2002)

  *) Fixed race condition in temporary file creation.
     [Sebastian Krahmer, SuSE Security]

  *) Make sure that under MM_SEMT_IPCSEM (mutex implementation method is
     SysV IPC semget) the {mm,MM}_permission() also changes the owner of
     the semaphore.
     [Jonathan Kamens <jonathank@worldwinner.com>]

  *) Add support for IRIX 6.5 and other Unix flavors which have
     MAXPATHLEN in <sys/param.h>
     [Joe Orton <jorton@redhat.com>]

  *) Removed the old fbtool stuff for reporting the success/failure
     because after 3 years of existence we really know that OSSP mm
     works on every reasonable Unix flavor on this earth.
     [Ralf S. Engelschall]

  *) Upgraded to GNU autoconf 2.53, GNU libtool 1.4.2 and GNU shtool
     1.6.1 build environment (using OSSP devtool).
     [Ralf S. Engelschall]

  *) Changed home from http://www.engelschall.com/sw/mm/ to OSSP
     http://www.ossp.org/pkg/lib/mm/ and official name from "MM" to
     "OSSP mm" to follow name conventions in the OSSP project.
     [Ralf S. Engelschall]

  *) Removed variables from ANSI C function prototypes in mm.h
     to avoid any potential conflicts in advance.
     [Ralf S. Engelschall]

  *) Adjusted year in copyright messages for 2002.
     [Ralf S. Engelschall]

  *) From Apache 2.0's MM patch set:
     Make Autoconf test for maximum shared memory size support BEOS and
     make decision cacheable.
     [The Apache Software Foundation]

  *) Fixed initializations of fdxxx variables in mm_core.c
     [Alexander Farber <farber@cpan.org>]

  *) Added $(DESTDIR) support to Makefile.in. This makes life easier
     for RPM package building.
     [Brad <brad@openbsd.org>, Ralf S. Engelschall]

  *) Fixed typo in mm.h: (still unused) definition of SIZEOF_mem_core_fd
     lacked a closing parenthesis.
     [Alexander Farber <farber@cpan.org>]

  *) Added required "(void *)" cast to MAP_FAILED in Autoconf stuff.
     [Albert Chin-A-Young <china@thewrittenword.com>,
     Joe Orton <jorton@redhat.com>]

 Changes between 1.1.2 and 1.1.3 (21-May-2000 to 01-Jul-2000)

  *) Upgraded to GNU libtool from version 1.3.4 to 1.3.5
     and upgraded GNU shtool from version 1.4.9 to 1.5.0
     [Ralf S. Engelschall]

  *) Added OS/390 support to config.sub.
     [Greg Ames <gregames@raleigh.ibm.com>]

  *) Fixed type-warnings related to `char' vs. `unsigned char' in mm_test.c
     [Ralf S. Engelschall]

  *) Let the internal mm_insert_chunk() function detect the situation
     where a chunk of memory is inserted twice (usually caused by the
     application through multiple and this way illegal calls to mm_free() with
     the same argument). This especially makes sure the internal list
     of free chunks is not corrupted.
     [Jeffrey Hsu <hsu@FreeBSD.ORG>, Ralf S. Engelschall]

  *) Fixed typos in mm.pod.
     [Ralf S. Engelschall]

 Changes between 1.1.1 and 1.1.2 (30-Apr-2000 to 21-May-2000)

  *) Fixed some logic in mm's configuration that removes -g from CFLAGS.
     It incorrectly collapsed " -g " to "", which leaded to invalid CFLAGS.
     [Jeff Trawick <trawickj@bellsouth.net>]

  *) Fixed shared memory decisions on Linux:
     We now avoid using MM_SHMT_MMANON (seems to be completely
     broken on 2.0), MM_SHMT_MMZERO (seems like Linux 2.0 hates this
     classical combination and return EINVAL for unknown reasons) and
     MM_SHMT_IPCSHM (requires that a IPC shm filesystem is mounted
     since 2.3). So, technically MM_SHMT_IPCSHM is preferred if the shm
     filesystem exists, else we count on MM_SHMT_MMFILE now.
     [Ralf S. Engelschall]

 Changes between 1.1.0 and 1.1.1 (30-Apr-2000 to 30-Apr-2000)

  *) Fixed compilation under Solaris where the SunOS4 and BS2000 kludges
     for <sys/shm.h> conflicted with the Sun vendor includes (which
     unfortunately use the defines).
     [Ralf S. Engelschall, Jeff Beard <jeff@cyberxape.com>]

 Changes between 1.0.12 and 1.1.0 (28-Sep-1999 to 30-Apr-2000)

  *) Fixed `make test' feedback procedure in Makefile.in now that the
     platform list is stored in the PORTING file.
     [Ralf S. Engelschall]

  *) Renamed file CHANGES to ChangeLog.
     [Ralf S. Engelschall]

  *) Fixed pointer arithmentic in memset/memcpy replacements
     by casting `void *' arguments to `char *'.
     [Sascha Schumann <sascha@schumann.cx>]

  *) Added BS2000 support for <sys/shm.h> stuff.
     [Martin Kraemer <Martin.Kraemer@Fujitsu-Siemens.com>]

  *) Added an include for <fcntl.h> to maximum shared mem segment size
     check in aclocal.m4. This especially fixes compile problems under for
     Solaris 8.
     [Alexander Demenchuk <alder@untech.com>, Greg Gears <gears@netair.com>]

  *) Fixed a warning under IRIX related to size_t comparisons
     [Ralf S. Engelschall]

  *) Added support for IBM OS/390
     [Jeff Trawick <trawick@ibm.net>]

  *) Upgraded to GNU libtool from version 1.3.3 to 1.3.4
     and upgraded GNU shtool from version 1.4.6 to 1.4.9
     [Ralf S. Engelschall]

  *) Upgraded config.guess to GNU Pth's version and
     use "/sbin/sysctl" under FreeBSD instead of just "sysctl"
     [Jeff Trawick <trawick@ibm.net>]

  *) Added platform support for the esoteric Unix look-alike BeOS
     [David Reid" <dreid@jetnet.co.uk>]

  *) Added `make check' as an alias for `make test'
     [Ralf S. Engelschall]

  *) Adjusted copyright messages for year 2000
     [Ralf S. Engelschall]

  *) Fixed Autoconf checks for SunOS
     [Ralf S. Engelschall]

  *) Fixed a bug in aclocal.m4's AC_CHECK_DEFINE macro.
     [Ralf S. Engelschall]

  *) Updated the manual page (typos, fixes, etc.)
     [Ralf S. Engelschall]

  *) Splitted README into README, PORTING and THANKS document.
     [Ralf S. Engelschall]

 Changes between 1.0.11 and 1.0.12 (06-Sep-1999 to 28-Sep-1999)

  *) Recreated configure with latest Autoconf 2.13.1 (snapshot)
  *) Always use --mode=xxx for libtool calls to avoid problems under
     situations where $CC doesn't allow libtool to guess the mode
     correctly.

 Changes between 1.0.10 and 1.0.11 (27-Aug-1999 to 06-Sep-1999)

  *) Cleaned up various file permission in source tree
  *) Enhanced mm-config.in: new --all option and less newlines
  *) Added support --silent to libtool glue code in aclocal.m4
  *) Upgraded to GNU Pth's more recent config.{guess,sub}
  *) Upgraded to GNU shtool 1.4.6
  *) Fixed --section for mm-config in Makefile.in
  *) Added `void *' casts to MAP_FAILED (= -1) values to avoid
     warnings under some platforms.
  *) Fixed a few typos in mm.pod

 Changes between 1.0.9 and 1.0.10 (02-Jul-1999 to 27-Aug-1999)

  *) Changed "make dist" and "make snap" to use "shtool tarball"
  *) Added #define KERNEL for SunOS to get SHM_R und SHM_W values.
  *) Upgraded to GNU libtool 1.3.3
  *) Upgraded to GNU shtool 1.4.5
  *) Downgraded required Autoconf version to 2.12
  *) Added MM version number to test report
  *) Added --enable-batch
  *) Moved mm_lock_mode in mm.h to top to avoid warnings

 Changes between 1.0.8 and 1.0.9 (24-Jun-1999 to 02-Jul-1999)

  *) Fixed a nasty bug related to {MM,mm}_[un]lock():
     an additional semicolon broke the semantics.
  *) Upgraded to released shtool 1.4.0
  *) Fixed `make test'

 Changes between 1.0.7 and 1.0.8 (22-Jun-1999 to 24-Jun-1999)

  *) Added important MAP_FAILED fallback also to Autoconf stuff
  *) Upgraded to latest shtool 1.3.0-dev to fix two Awk problems

 Changes between 1.0.6 and 1.0.7 (06-Jun-1999 to 22-Jun-1999)

  *) Upgraded to latest shtool 1.3.0-dev
  *) Avoid -g under non-debugging situation
  *) Complain with a fatal error message when MM_SHM_MAXSEGSIZE
     couldn't be determined.
  *) Updated config.guess/config.sub
  *) Fixed a nasty permission bug for the lock files:
     they were opened write-only, but at least fcntl()
     requires them to be opened read-write.
  *) Check return value of mm_core_lock() in mm_alloc.c

 Changes between 1.0.5 and 1.0.6 (02-Jun-1999 to 06-Jun-1999)

  *) Fixed mm_malloc() function: it returned the wrong pointer when a chunk
     was reused and forgot to lock/unlock the data structures.
  *) Fixed internal best-fit algorithm for finding a free memory chunk:
     - things got inserted out of order in the list
     - when chunk is found which matches size exactly it stops immediately
     - lowered chunk splitting threshold to MIN(2*size,128)
  *) Moved internal definitions in mm.h to private section

 Changes between 1.0.4 and 1.0.5 (21-May-1999 to 02-Jun-1999)

  *) Fixed output of mm-config.in
  *) Fixed output of configure --help
  *) Upgraded to GNU libtool 1.3.2
  *) Upgraded to shtool 1.2.9
  *) Made libtool calls visible but use --quiet
  *) Hint user to send feedback only on errors or for new platform
  *) Removed unnecessary "elf" hint for FreeBSD from config.guess

 Changes between 1.0.3 and 1.0.4 (15-May-1999 to 21-May-1999)

  *) Fixed maximum memory size determination and internal handling
  *) Documented the mm_lib_xxx() functions.

 Changes between 1.0.2 and 1.0.3 (26-Apr-1999 to 15-May-1999)

  *) Added {MM,mm,mm_core}_permission() function
  *) Fixed version information and mod_ssl URL in manual page
  *) Upgraded config.{guess,sub} from libtool 1.3 distribution
  *) Upgraded to GNU libtool 1.3
  *) Upgraded to shtool 1.2.7
  *) Fixed public includes for xx_t types
  *) Fixed mm_vers.c and shtool type inside CVS

 Changes between 1.0.1 and 1.0.2 (18-Apr-1999 to 26-Apr-1999)

  *) Upgraded to GNU libtool 1.2f
  *) Upgraded to shtool 1.1.0

 Changes between 1.0.0 and 1.0.1 (18-Mar-1999 to 18-Apr-1999)

  *) Fixed "dist" Makefile target to not distribute CVS stuff
  *) Upgraded lshtool to the latest version
  *) Const'ification of the API

 Changes between 1.0b6 and 1.0.0 (18-Mar-1999 to 28-Mar-1999)

  *) Finally cleaned up and polished the mm.pod manual page.
  *) Fixed mm-config program

 Changes between 1.0b5 and 1.0b6 (18-Mar-1999 to 18-Mar-1999)

  *) Added {MM,mm}_maxsize() to manual page
  *) Changed MM_create() signature to match mm_create()

 Changes between 1.0b4 and 1.0b5 (15-Mar-1999 to 18-Mar-1999)

  *) Make sure the maximum allocateable size takes
     the overhead of the memory pool into account.
  *) Fixed lshtool and this way hex version string
  *) Fixed Makefile for mm_test target dependecies
  *) Added {MM,mm}_maxsize() function to let one
     determine in advance the maximum allocateable pool

 Changes between 1.0b3 and 1.0b4 (15-Mar-1999 to 15-Mar-1999)

  *) Added mm-config.pod manpage
  *) Split mm-config --ldflags into --ldflags and --libs
  *) Removed TODO and fulltest files

 Changes between 1.0b2 and 1.0b3 (13-Mar-1999 to 15-Mar-1999)

  *) Added Autoconf check for determining max shared mem segment size
  *) Changed -1 to MAP_FAILED when available
  *) Replaced 8KB default shared memory segment size with max size
  *) Added mm_core_maxsegsize() function
  *) Use a remembered offset for mmap() on temporary files
  *) Imported source tree into CVS
  *) Added read-only locking support
  *) Fixed MMFILE and MMZERO variants

 Changes between 1.0b1 and 1.0b2 (12-Mar-1999 to 13-Mar-1999)

  *) Updated the mm.pod manual page.
  *) Split README into README and LICENSE files
  *) Fixed becho problems
  *) Added a test suite summary
  *) Added INSTALL file
  *) Reduced mm_test's memory size from 1MB to 512KB
  *) Fixed unsigned long and %X related warnings

 Changes between 1.0b0 and 1.0b1 (11-Mar-1999 to 12-Mar-1999)

  *) Enhanced mm_test
  *) Added {MM,mm}_available() function
  *) Fixed MMZERO
  *) Fixed IPC Semaphore initialization
  *) Added --with-{sem,shm}=TYPE options
  *) Fixed "make test" and mm_memory_display() function
  *) Added mm_lib.c source with mm_lib_xx() functions

 Changes between 0.9.0 and 1.0b0 (10-Mar-1999 to 11-Mar-1999)

  *) Switched to GNU Autoconf and GNU Libtool

 Changes between GENESIS and 0.9.0 (Jan-1999 to 10-Mar-1999)

  *) Created initial version on FreeBSD
  *) Ported to Linux and Solaris