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		pirms 9 gadiem
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autocompact_test.cc	LevelDB 1.13	pirms 11 gadiem
builder.cc	A number of fixes:	pirms 13 gadiem
builder.h	A number of fixes:	pirms 13 gadiem
c.cc	Small fixes.	pirms 12 gadiem
c_test.c	Small fixes.	pirms 12 gadiem
corruption_test.cc	LevelDB now attempts to reuse the preceding MANIFEST and log file when re-opened.	pirms 9 gadiem
db_bench.cc	Only compiling TrimSpace on linux.	pirms 9 gadiem
db_impl.cc	Add "approximate-memory-usage" property to leveldb::DB::GetProperty	pirms 9 gadiem
db_impl.h	LevelDB now attempts to reuse the preceding MANIFEST and log file when re-opened.	pirms 9 gadiem
db_iter.cc	Release LevelDB 1.14	pirms 11 gadiem
db_iter.h	LevelDB 1.13	pirms 11 gadiem
db_test.cc	Add "approximate-memory-usage" property to leveldb::DB::GetProperty	pirms 9 gadiem
dbformat.cc	Release leveldb 1.10	pirms 11 gadiem
dbformat.h	Release 1.18	pirms 10 gadiem
dbformat_test.cc	A number of fixes:	pirms 13 gadiem
dumpfile.cc	Release 1.18	pirms 10 gadiem
fault_injection_test.cc	LevelDB now attempts to reuse the preceding MANIFEST and log file when re-opened.	pirms 9 gadiem
filename.cc	Release LevelDB 1.14	pirms 11 gadiem
filename.h	Release LevelDB 1.14	pirms 11 gadiem
filename_test.cc	Release LevelDB 1.14	pirms 11 gadiem
leveldb_main.cc	Release 1.18	pirms 10 gadiem
log_format.h	Release 1.18	pirms 10 gadiem
log_reader.cc	Suppress error reporting after seeking but before a valid First or Full record is encountered.	pirms 9 gadiem
log_reader.h	Suppress error reporting after seeking but before a valid First or Full record is encountered.	pirms 9 gadiem
log_test.cc	Suppress error reporting after seeking but before a valid First or Full record is encountered.	pirms 9 gadiem
log_writer.cc	LevelDB now attempts to reuse the preceding MANIFEST and log file when re-opened.	pirms 9 gadiem
log_writer.h	LevelDB now attempts to reuse the preceding MANIFEST and log file when re-opened.	pirms 9 gadiem
memtable.cc	A number of fixes:	pirms 13 gadiem
memtable.h	Resolve race when getting approximate-memory-usage property	pirms 9 gadiem
recovery_test.cc	LevelDB now attempts to reuse the preceding MANIFEST and log file when re-opened.	pirms 9 gadiem
repair.cc	Release 1.18	pirms 10 gadiem
skiplist.h	Move header guard below copyright banner.	pirms 10 gadiem
skiplist_test.cc	A number of fixes:	pirms 13 gadiem
snapshot.h	Clean up layering of storage/leveldb/...	pirms 10 gadiem
table_cache.cc	Release LevelDB 1.14	pirms 11 gadiem
table_cache.h	Added bloom filter support.	pirms 12 gadiem
version_edit.cc	A number of fixes:	pirms 13 gadiem
version_edit.h	A number of fixes:	pirms 13 gadiem
version_edit_test.cc	A number of fixes:	pirms 13 gadiem
version_set.cc	Will not reuse manifest if reuse_logs options is false.	pirms 9 gadiem
version_set.h	LevelDB now attempts to reuse the preceding MANIFEST and log file when re-opened.	pirms 9 gadiem
version_set_test.cc	A number of fixes:	pirms 13 gadiem
write_batch.cc	added group commit; drastically speeds up mult-threaded synchronous write workloads	pirms 12 gadiem
write_batch_internal.h	Clean up layering of storage/leveldb/...	pirms 10 gadiem
write_batch_test.cc	added group commit; drastically speeds up mult-threaded synchronous write workloads	pirms 12 gadiem