XOY-Leveldb

小组成员：谢瑞阳、徐翔宇

gabor@google.com ed154f6dc4 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: https://leveldb.googlecode.com/svn/trunk@36 62dab493-f737-651d-591e-8d6aee1b9529			13 роки тому
..
win	reverting disastrous MOE commit, returning to r21	删除	13 роки тому
README	reverting disastrous MOE commit, returning to r21		13 роки тому
atomic_pointer.h	Fixed a snappy compression wrapper bug (passing wrong variable).		13 роки тому
port.h	Platform detection during build, plus compatibility patches for machines without <cstdatomic>.		13 роки тому
port_android.cc	reverting disastrous MOE commit, returning to r21		13 роки тому
port_android.h	@20776309		13 роки тому
port_chromium.cc	reverting disastrous MOE commit, returning to r21		13 роки тому
port_chromium.h	@20776309		13 роки тому
port_example.h	@20776309		13 роки тому
port_posix.cc	reverting disastrous MOE commit, returning to r21		13 роки тому
port_posix.h	Fixed a snappy compression wrapper bug (passing wrong variable).		13 роки тому
sha1_portable.cc	reverting disastrous MOE commit, returning to r21		13 роки тому
sha1_portable.h	reverting disastrous MOE commit, returning to r21		13 роки тому
sha1_test.cc	reverting disastrous MOE commit, returning to r21		13 роки тому

README

This directory contains interfaces and implementations that isolate the
rest of the package from platform details.

Code in the rest of the package includes "port.h" from this directory.
"port.h" in turn includes a platform specific "port_<platform>.h" file
that provides the platform specific implementation.

See port_posix.h for an example of what must be provided in a platform
specific header file.