XOY-Leveldb

小组成员：谢瑞阳、徐翔宇

Vēsture

ssid 706b7f8d43 Resolve race when getting approximate-memory-usage property The write operations in the table happens without holding the mutex lock, but concurrent writes are avoided using "writers_" queue. The Arena::MemoryUsage could access the blocks when write happens. So, the memory usage is cached in atomic word and can be loaded from any thread safely. ------------- Created by MOE: https://github.com/google/moe MOE_MIGRATED_REVID=107573379		pirms 9 gadiem
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arena.cc	Resolve race when getting approximate-memory-usage property	pirms 9 gadiem
arena.h	Resolve race when getting approximate-memory-usage property	pirms 9 gadiem
arena_test.cc	Release LevelDB 1.15	pirms 11 gadiem
bloom.cc	Fix size_t/int comparison/conversion issues in leveldb.	pirms 9 gadiem
bloom_test.cc	Fix size_t/int comparison/conversion issues in leveldb.	pirms 9 gadiem
cache.cc	Add "approximate-memory-usage" property to leveldb::DB::GetProperty	pirms 9 gadiem
cache_test.cc	Add leveldb::Cache::Prune	pirms 9 gadiem
coding.cc	Update to leveldb 1.6	pirms 12 gadiem
coding.h	A number of fixes:	pirms 13 gadiem
coding_test.cc	Release LevelDB 1.15	pirms 11 gadiem
comparator.cc	Remove static initializer; fix endian-ness detection; fix build on	pirms 12 gadiem
crc32c.cc	A number of fixes:	pirms 13 gadiem
crc32c.h	A number of fixes:	pirms 13 gadiem
crc32c_test.cc	A number of fixes:	pirms 13 gadiem
env.cc	LevelDB now attempts to reuse the preceding MANIFEST and log file when re-opened.	pirms 9 gadiem
env_posix.cc	LevelDB now attempts to reuse the preceding MANIFEST and log file when re-opened.	pirms 9 gadiem
env_test.cc	fixed issues 66 (leaking files on disk error) and 68 (no sync of CURRENT file)	pirms 13 gadiem
filter_policy.cc	Added bloom filter support.	pirms 12 gadiem
hash.cc	Release 1.18	pirms 10 gadiem
hash.h	reverting disastrous MOE commit, returning to r21	pirms 13 gadiem
hash_test.cc	Release 1.18	pirms 10 gadiem
histogram.cc	A number of fixes:	pirms 13 gadiem
histogram.h	A number of fixes:	pirms 13 gadiem
logging.cc	Release 1.18	pirms 10 gadiem
logging.h	Release 1.18	pirms 10 gadiem
mutexlock.h	Update to leveldb 1.6	pirms 12 gadiem
options.cc	LevelDB now attempts to reuse the preceding MANIFEST and log file when re-opened.	pirms 9 gadiem
posix_logger.h	A number of fixes:	pirms 13 gadiem
random.h	LevelDB 1.13	pirms 11 gadiem
status.cc	A number of fixes:	pirms 13 gadiem
testharness.cc	Release LevelDB 1.15	pirms 11 gadiem
testharness.h	A number of fixes:	pirms 13 gadiem
testutil.cc	Release LevelDB 1.15	pirms 11 gadiem
testutil.h	LevelDB now attempts to reuse the preceding MANIFEST and log file when re-opened.	pirms 9 gadiem