Xavier Deguillard 88dcfa7bb3 utils: add an RcuPtr class ... Summary: RCU is a synchronization mechanism that allows for very fast reads, at the expense of slower writes. This is achieved by having the reader sometimes reading a stale pointer when concurrent to a write, at which point the writer will delay reclaiming the old data to a later moment where it is known that no reader can hold a pointer to the old data. Doing that allows for the read operations to be significantly faster than using a Synchronized lock. Folly's documentation claims a read lock/unlock of RCU runs in ~4ns, while the same for Synchronized is ~26ns. Due to the writers cost, RCU is perfectly suited for places where reads needs to be as fast as possible, and writes are very infrequent. One typical example is when caching an application's configuration, we can expect reading the configuration values more frequently than it is being reloaded, and in the case where the configuration mismatch, a stale configuration can be tolerated by the application. In EdenFS, we can use RCU on Windows to make sure that unmounting a repository will wait on all the pending callbacks. Reviewed By: kmancini Differential Revision: D25351536 fbshipit-source-id: 050ca0337e67ae195f4f16062dddb60f584af692		2020-12-11 14:10:58 -08:00
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test	utils: add an RcuPtr class	2020-12-11 14:10:58 -08:00
BucketedLog.h	remove dependency on glog	2020-11-10 16:31:15 -08:00
BufVec.h	fuse: move BufVec.h to utils/	2020-09-02 12:15:48 -07:00
Bug.cpp	refactor the EDEN_BUG() macro	2019-11-22 15:38:33 -08:00
Bug.h	Remove folly's ColdClass, which was of dubious utility	2020-01-09 13:09:56 -08:00
ChronoParse.cpp	Replace Folly Format with fmt in logger to reduce binary size	2019-11-18 05:53:08 -08:00
ChronoParse.h	Tidy up license headers	2019-10-11 05:28:23 -07:00
ChronoUnit.cpp	Tidy up license headers	2019-10-11 05:28:23 -07:00
ChronoUnit.gperf	update license header in remaining files	2019-06-19 17:02:46 -07:00
ChronoUnit.h	Tidy up license headers	2019-10-11 05:28:23 -07:00
Clock.cpp	utils: remove UnixClock::getElapsedTimeInNs	2020-09-30 15:50:08 -07:00
Clock.h	utils: remove UnixClock::getElapsedTimeInNs	2020-09-30 15:50:08 -07:00
CMakeLists.txt	utils: remove //eden/fs/utils/test:linux_test	2020-11-16 08:29:04 -08:00
CoverageSet.cpp	remove dependency on glog	2020-11-10 16:31:15 -08:00
CoverageSet.h	Tidy up license headers	2019-10-11 05:28:23 -07:00
DirType.cpp	assert that the dtype constants have consistent values on all platforms	2020-04-28 13:23:52 -07:00
DirType.h	Cleaning up second definitions of dtype_t	2020-03-10 12:27:51 -07:00
EnumValue.h	add enumValue utility function	2020-04-28 17:41:24 -07:00
FaultInjector.cpp	build deprecation-clean	2019-11-12 16:31:54 -08:00
FaultInjector.h	Tidy up license headers	2019-10-11 05:28:23 -07:00
FileDescriptor.cpp	eden: fix buffer advance in FileDescriptor::wrapFull	2020-09-02 23:38:18 -07:00
FileDescriptor.h	eden: introduce SpawnedProcess	2020-09-01 13:31:32 -07:00
FileUtils.cpp	utils: truncate nul bytes after obtaining a temp file name	2020-10-22 16:24:17 -07:00
FileUtils.h	win: move win/utils onto utils/	2020-09-22 09:09:56 -07:00
Future.h	add a collectSafe function	2020-02-03 11:30:50 -08:00
FutureUnixSocket.cpp	remove dependency on glog	2020-11-10 16:31:15 -08:00
FutureUnixSocket.h	Tidy up license headers	2019-10-11 05:28:23 -07:00
Guid.h	utils: fix zero-initialization in Guid.h	2020-10-02 10:50:54 -07:00
Handle.h	remove dependency on glog	2020-11-10 16:31:15 -08:00
IDGen.cpp	Tidy up license headers	2019-10-11 05:28:23 -07:00
IDGen.h	Tidy up license headers	2019-10-11 05:28:23 -07:00
IoFuture.cpp	remove dependency on glog	2020-11-10 16:31:15 -08:00
IoFuture.h	Tidy up license headers	2019-10-11 05:28:23 -07:00
LazyInitialize.h	Tidy up license headers	2019-10-11 05:28:23 -07:00
LeaseCache.h	Tidy up license headers	2019-10-11 05:28:23 -07:00
MappedDiskVector.h	remove dependency on glog	2020-11-10 16:31:15 -08:00
Memory.cpp	introduce an assertZeroBits function to double-check the compiler	2020-09-13 01:37:14 -07:00
Memory.h	introduce an assertZeroBits function to double-check the compiler	2020-09-13 01:37:14 -07:00
NotImplemented.h	utils: move win/utils/Stub.h to utils/NotImplemented.h	2020-09-16 12:31:46 -07:00
PathFuncs.cpp	remove dependency on glog	2020-11-10 16:31:15 -08:00
PathFuncs.h	improve PathComponent parse failure error messaging	2020-11-17 12:53:39 -08:00
PathMap.h	edenfs: fixup PathMap copy and move ctor for case sensitivity	2020-09-23 09:46:57 -07:00
Pipe.cpp	eden: introduce FileDescriptor and Pipe types	2020-09-01 13:31:32 -07:00
Pipe.h	eden: introduce FileDescriptor and Pipe types	2020-09-01 13:31:32 -07:00
ProcessAccessLog.cpp	remove dependency on glog	2020-11-10 16:31:15 -08:00
ProcessAccessLog.h	remove dependency on glog	2020-11-10 16:31:15 -08:00
ProcessNameCache.cpp	remove dependency on glog	2020-11-10 16:31:15 -08:00
ProcessNameCache.h	utils: compile ProcessAccessLog and ProcessNameCache on Windows	2020-09-04 16:14:25 -07:00
ProcUtil.cpp	Remove dead includes in eden	2020-10-09 15:25:47 -07:00
ProcUtil.h	utils: add a platform independent FileUtils	2020-08-14 18:56:33 -07:00
Rcu.h	utils: add an RcuPtr class	2020-12-11 14:10:58 -08:00
SortedInsert.h	Tidy up license headers	2019-10-11 05:28:23 -07:00
SpawnedProcess.cpp	remove dependency on glog	2020-11-10 16:31:15 -08:00
SpawnedProcess.h	eden: introduce SpawnedProcess	2020-09-01 13:31:32 -07:00
SSLContext.cpp	remove dependency on glog	2020-11-10 16:31:15 -08:00
SSLContext.h	Tidy up license headers	2019-10-11 05:28:23 -07:00
StatTimes.h	eden: add stattimes helpers for win32	2020-04-24 15:57:27 -07:00
StringConv.cpp	utils: move multibyteToWideString to a cpp file	2020-09-30 16:29:13 -07:00
StringConv.h	utils: move multibyteToWideString to a cpp file	2020-09-30 16:29:13 -07:00
Synchronized.h	Tidy up license headers	2019-10-11 05:28:23 -07:00
SystemError.h	Tidy up license headers	2019-10-11 05:28:23 -07:00
Thread.cpp	fs: ifdef linux/macos only files	2020-09-23 12:20:41 -07:00
Thread.h	disable pthread cancellation on the FuseChannel threads	2020-05-08 20:41:50 -07:00
TimeUtil.cpp	remove dependency on glog	2020-11-10 16:31:15 -08:00
TimeUtil.h	Tidy up license headers	2019-10-11 05:28:23 -07:00
UnboundedQueueExecutor.cpp	Tidy up license headers	2019-10-11 05:28:23 -07:00
UnboundedQueueExecutor.h	Tidy up license headers	2019-10-11 05:28:23 -07:00
UnixSocket.cpp	remove dependency on glog	2020-11-10 16:31:15 -08:00
UnixSocket.h	edenfs: remove use of fork from StartupLogger	2020-09-18 17:22:39 -07:00
UserInfo.cpp	win: move win/utils onto utils/	2020-09-22 09:09:56 -07:00
UserInfo.h	eden: use SpawnedProcess to start privhelper	2020-09-18 17:22:39 -07:00
Utf8.cpp	add some utf-8 helper functions	2020-06-10 19:29:51 -07:00
Utf8.h	add some utf-8 helper functions	2020-06-10 19:29:51 -07:00
WinError.cpp	Back out "prjfs: handle concurrent file/directory removal"	2020-12-10 07:42:38 -08:00
WinError.h	edenfs: move WinError to eden/fs/utils	2020-09-17 09:08:58 -07:00
XAttr.cpp	fs: ifdef linux/macos only files	2020-09-23 12:20:41 -07:00
XAttr.h	Tidy up license headers	2019-10-11 05:28:23 -07:00