| commit | c3876d4a4c6fe06baf3780d38091ca7c3af1e42f | |
| author | Giuseppe Ottaviano <[email protected]> | |
| Wed, 12 Oct 2022 01:52:11 +0000 (11 18:52 -0700) | ||
| committer | Facebook GitHub Bot <[email protected]> | |
| Wed, 12 Oct 2022 01:52:11 +0000 (11 18:52 -0700) | ||
| tree | 82954eeaa7420ee4cae782114933af289420b729 | treesnapshot (tar.gz zip) |
| parent | a97b7ec17f9b8cd278edb4de18f7bceb54314282 | commitdiff |
set_once()
Summary:
Counterpart to `reset_once()`. This is useful in constructors (for example copy constructors, or when laziness is conditional) where synchronization is not needed.
Besides being more self-documenting than `call_once(flag, [] {})`, it saves one (uncontended) lock acquisition.
Reviewed By: aary
Differential Revision: D40258125
fbshipit-source-id: afada56089c2958ecd930c525954b6989a40c6c3
Summary:
Counterpart to `reset_once()`. This is useful in constructors (for example copy constructors, or when laziness is conditional) where synchronization is not needed.
Besides being more self-documenting than `call_once(flag, [] {})`, it saves one (uncontended) lock acquisition.
Reviewed By: aary
Differential Revision: D40258125
fbshipit-source-id: afada56089c2958ecd930c525954b6989a40c6c3
| third-party/folly/src/folly/synchronization/CallOnce.h | diffblobblamehistory | |
| third-party/folly/src/folly/synchronization/test/CallOnceTest.cpp | diffblobblamehistory |