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Historically we've used the SWPB instruction for TAS() on ARM, but this is deprecated and not available on ARMv6 and later. Instead, make use of a GCC builtin if available. We'll still fall back to SWPB if not, so as not to break existing ports using older GCC versions. Eventually we might want to try using __sync_lock_test_and_set() on some other architectures too, but for now that seems to present only risk and not reward. Back-patch to all supported versions, since people might want to use any of them on more recent ARM chips. Martin Pitt |
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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. Changes between all PostgreSQL releases are recorded in the file HISTORY. 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/.