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Robert Haas 4893ccd024 Remove swpb-based spinlock implementation for ARMv5 and earlier. 
Per recent analysis by Andres Freund, this implementation is in fact
unsafe, because ARMv5 has weak memory ordering, which means tha the
CPU could move loads or stores across the volatile store performed by
the default S_UNLOCK.  We could try to fix this, but have no ARMv5
hardware to test on, so removing support seems better.  We can still
support ARMv5 systems on GCC versions new enough to have built-in
atomics support for this platform, and can also re-add support for
the old way if someone has hardware that can be used to test a fix.
However, since the requirement to use a relatively-new GCC hasn't
been an issue for ARMv6 or ARMv7, which lack the swpb instruction
altogether, perhaps it won't be an issue for ARMv5 either.
 		2014-07-06 14:56:36 -04:00
config Remove some useless code in the configure script. 2014-07-01 17:51:53 -04:00
contrib Fix decoding of MULTI_INSERTs when rows other than the last are toasted. 2014-07-06 15:58:01 +02:00
doc Split out the description of page-level lock as new subsection in document. 2014-07-04 11:24:59 +09:00
src Remove swpb-based spinlock implementation for ARMv5 and earlier. 2014-07-06 14:56:36 -04:00
.dir-locals.el Update Emacs configuration 2013-08-13 20:08:44 -04:00
.gitattributes gitattributes: Make syntax compatible with older Git versions 2013-11-12 21:58:46 -05:00
.gitignore Add *.pot to .gitignore 2013-10-19 10:56:52 -04:00
COPYRIGHT Update copyright for 2014 2014-01-07 16:05:30 -05:00
GNUmakefile.in Add TAP tests for client programs 2014-04-14 21:33:46 -04:00
HISTORY Improve text of stub HISTORY file. 2014-02-12 18:16:17 -05:00
Makefile Allow make check in PL directories 2011-02-15 06:52:12 +02:00
README Don't generate plain-text HISTORY and src/test/regress/README anymore. 2014-02-10 20:48:04 -05:00
README.git Don't generate plain-text HISTORY and src/test/regress/README anymore. 2014-02-10 20:48:04 -05:00
aclocal.m4 Remove cvs keywords from all files. 2010-09-20 22:08:53 +02:00
configure Remove some useless code in the configure script. 2014-07-01 17:51:53 -04:00
configure.in Remove some useless code in the configure script. 2014-07-01 17:51:53 -04:00

README 

PostgreSQL Database Management System
=====================================

This directory contains the source code distribution of the PostgreSQL
database management system.

PostgreSQL is an advanced object-relational database management system
that supports an extended subset of the SQL standard, including
transactions, foreign keys, subqueries, triggers, user-defined types
and functions.  This distribution also contains C language bindings.

PostgreSQL has many language interfaces, many of which are listed here:

	http://www.postgresql.org/download

See the file INSTALL for instructions on how to build and install
PostgreSQL.  That file also lists supported operating systems and
hardware platforms and contains information regarding any other
software packages that are required to build or run the PostgreSQL
system.  Copyright and license information can be found in the
file COPYRIGHT.  A comprehensive documentation set is included in this
distribution; it can be read as described in the installation
instructions.

The latest version of this software may be obtained at
http://www.postgresql.org/download/.  For more information look at our
web site located at http://www.postgresql.org/.