commit e67cd63d8a779971247078b2715b6ae7b37dbc2e
author gabor@google.com <gabor@google.com@62dab493-f737-651d-591e-8d6aee1b9529> Thu Jun 30 23:17:03 2011 +0000
committer gabor@google.com <gabor@google.com@62dab493-f737-651d-591e-8d6aee1b9529> Thu Jun 30 23:17:03 2011 +0000
tree 4149204645a78b6a498ebb1f8fa3d468944256c3
parent bb1914e5b77bd14283e80d411feccffa26488003

Fixed a snappy compression wrapper bug (passing wrong variable).

Change atomic_pointer.h to prefer a memory barrier based
implementation over a <cstdatomic> based implementation for
the following reasons:
(1) On a x86-32-bit gcc-4.4 build, <ctdatomic> was corrupting
    the AtomicPointer.
(2) On a x86-64-bit gcc build, a <ctstdatomic> based acquire-load
    takes ~15ns as opposed to the ~1ns for a memory-barrier
    based implementation.

Fixes issue 9 (corruption_test fails)
http://code.google.com/p/leveldb/issues/detail?id=9

Fixes issue 16 (CorruptionTest.MissingDescriptor fails)
http://code.google.com/p/leveldb/issues/detail?id=16



git-svn-id: http://leveldb.googlecode.com/svn/trunk@36 62dab493-f737-651d-591e-8d6aee1b9529