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6b050c7be5
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Adam Simpkins 6b050c7be5 restructure FileInode open refcount management 
Summary:
This adds a new LockedState helper class in FileInode to also keep track of
whether or not we are currently holding an refcount on the open file/blob.  The
LockedState object automatically decrements this refcount on destruction.
Alternatively, this refcount can be transferred to a new EdenFileHandle object
when unlocking the state.

Previously most of the internal FileInode code simply used EdenFileHandle
objects to manage this refcount.  However, this is prone to deadlock, since you
have to ensure that EdenFileHandle objects are never destroyed while the state
is already locked.  This new LockedState API makes it harder to have code paths
that may accidentally destroy an EdenFileHandle object while holding the state
lock.

Reviewed By: chadaustin

Differential Revision: D7407423

fbshipit-source-id: 610fcda3220a9f49b734910b7a13e8d68a81a779
2018-03-27 11:23:42 -07:00
common Remove TARGETS files 2018-02-20 19:57:45 -08:00
eden restructure FileInode open refcount management 2018-03-27 11:23:42 -07:00
external remove files related to open-source buck builds 2018-02-05 12:21:16 -08:00
.gitignore Initial commit 2016-05-12 14:09:13 -07:00
CONTRIBUTING.md Initial commit 2016-05-12 14:09:13 -07:00
getdeps.py getdeps: fix fbthrift build 2018-01-08 12:10:19 -08:00
LICENSE Initial commit 2016-05-12 14:09:13 -07:00
PATENTS Initial commit 2016-05-12 14:09:13 -07:00
README.md Fix a typo in Eden's README.md. 2016-05-13 09:32:03 -07:00

README.md

Eden

Eden is a project with several components, the most prominent of which is a virtual filesystem built using FUSE.

Caveat Emptor

Eden is still in early stages of development. We are making it available now because we plan to start making references to it from our other open source projects, such as Buck, Watchman, and Nuclide.

The version that we provide on GitHub does not build yet.

This is because the code is exported verbatim from an internal repository at Facebook, and not all of the scaffolding from our internal repository can be easily extracted. The key areas where we need to shore things up are:

  • The reinterpretations of build macros in DEFS.
  • A process for including third-party dependencies (presumably via Git submodules) and wiring up the external_deps argument in the build macros to point to them.
  • Providing the toolchain needed to power the [undocumented] thrift_library() rule in Buck.

The goal is to get Eden building on both Linux and OS X, though Linux support is expected to come first.