LevelDB-course-Lab

小组成员：10215300402-朱维清 & 10222140408 谷杰

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		9 vuotta sitten
..
arena.cc	Resolve race when getting approximate-memory-usage property	9 vuotta sitten
arena.h	Resolve race when getting approximate-memory-usage property	9 vuotta sitten
arena_test.cc	Release LevelDB 1.15	11 vuotta sitten
bloom.cc	Fix size_t/int comparison/conversion issues in leveldb.	9 vuotta sitten
bloom_test.cc	Fix size_t/int comparison/conversion issues in leveldb.	9 vuotta sitten
cache.cc	Add "approximate-memory-usage" property to leveldb::DB::GetProperty	9 vuotta sitten
cache_test.cc	Add leveldb::Cache::Prune	9 vuotta sitten
coding.cc	Update to leveldb 1.6	12 vuotta sitten
coding.h	A number of fixes:	13 vuotta sitten
coding_test.cc	Release LevelDB 1.15	11 vuotta sitten
comparator.cc	Remove static initializer; fix endian-ness detection; fix build on	12 vuotta sitten
crc32c.cc	A number of fixes:	13 vuotta sitten
crc32c.h	A number of fixes:	13 vuotta sitten
crc32c_test.cc	A number of fixes:	13 vuotta sitten
env.cc	LevelDB now attempts to reuse the preceding MANIFEST and log file when re-opened.	9 vuotta sitten
env_posix.cc	LevelDB now attempts to reuse the preceding MANIFEST and log file when re-opened.	9 vuotta sitten
env_test.cc	fixed issues 66 (leaking files on disk error) and 68 (no sync of CURRENT file)	13 vuotta sitten
filter_policy.cc	Added bloom filter support.	12 vuotta sitten
hash.cc	Release 1.18	10 vuotta sitten
hash.h	reverting disastrous MOE commit, returning to r21	13 vuotta sitten
hash_test.cc	Release 1.18	10 vuotta sitten
histogram.cc	A number of fixes:	13 vuotta sitten
histogram.h	A number of fixes:	13 vuotta sitten
logging.cc	Release 1.18	10 vuotta sitten
logging.h	Release 1.18	10 vuotta sitten
mutexlock.h	Update to leveldb 1.6	12 vuotta sitten
options.cc	LevelDB now attempts to reuse the preceding MANIFEST and log file when re-opened.	9 vuotta sitten
posix_logger.h	A number of fixes:	13 vuotta sitten
random.h	LevelDB 1.13	11 vuotta sitten
status.cc	A number of fixes:	13 vuotta sitten
testharness.cc	Release LevelDB 1.15	11 vuotta sitten
testharness.h	A number of fixes:	13 vuotta sitten
testutil.cc	Release LevelDB 1.15	11 vuotta sitten
testutil.h	LevelDB now attempts to reuse the preceding MANIFEST and log file when re-opened.	9 vuotta sitten