Summary: Integrating RequestContext into fibers library. RequestContext is saved for every task, when that task is created. If RequestContext is overriden when a task is being run (within fiber, in runInMainContext, within function passed to await call) the new context will continue to be used for the task.

Reviewed By: @alikhtarov

Differential Revision: D2240152

Reviewed By: @philippv

Differential Revision: D2240628

Summary: [Folly] Fix Build: folly/io/async/test/ScopedEventBasedThreadTest.cpp

Failure with latest clang:

    folly/io/async/test/ScopedEventBaseThreadTest.cpp:72:8: error: explicitly moving variable of type 'folly::ScopedEventBaseThread' to itself [-Werror,-Wself-move]
      sebt = std::move(sebt);

Reviewed By: @markisaa

Differential Revision: D2238762

Summary: [Folly] File ctor should take StringPiece.

This way we can use it with `std::string` and `folly::fbstring` a touch more easily.

Reviewed By: @luciang

Differential Revision: D2235870

Reviewed By: @chipturner

Differential Revision: D2235232

Summary: This is only a simple #include file split, no functional change was made. SmallLocks.h provides 2 classes: MicroSpinLock and PicoSpinLock, with the latter not being available on 32bit platforms. There are several classes in folly that included SmallLocks.h but only needed MicroSpinLock, these also refused to compile on 32bit, e.g. folly/futures/Future.h. Now these compile fine.

Reviewed By: @yfeldblum

Differential Revision: D2234263

Summary: [Folly] An has_member_type macro.

Reviewed By: @juchem

Differential Revision: D2229775

Summary: After discussion with Tom about frozen files, we noticed that the use
case of filtering out somthing that looks like false (0, nullptr, folly::none)
is unnecessarily tedious. So folly::gen::filter now filters by the value of
the item by default.

Reviewed By: @ddrcoder

Differential Revision: D2220582

Summary: Add mocks for the new isBufferMovable methods.

Reviewed By: @yfeldblum

Differential Revision: D2222642

Summary: [Folly] ThreadedExecutor.

It's an Executor that runs functions each in its own thread.

Kind of simple. Suitable for a few types of strange cases.

Reviewed By: @​hannesr

Differential Revision: D2226211

Summary: Add a way to tell whether an IOBuf (either indvidually or the whole chain)
refers to memory that's outside of IOBuf's control (via WRAP_BUFFER). That is,
can you assume that clone() will extend the lifetime of the memory? Is it safe
to use clone() instead of copying the data (and avoid a copy)?

Reviewed By: @simpkins

Differential Revision: D2191883

Summary: Early in the startup process there may not be a default signal handler installed, and stack traces are not available; also during the startup process is when init-order fiascos occur.  Dump a stacktrace and fatal when an unregistered singleton is used.

Also fatals -- with glog `LOG(FATAL)`, which triggers an ABRT signal -- on other illegal and unrecoverable usage like double-registration or circular dependency.

Reviewed By: @andriigrynenko

Differential Revision: D2200408

Summary: Ran into a bug in D2158570 where we dtor'ing these data structures before the event bases destructed, so the assert on line 47 (of the old code) failed.

Reviewed By: @andriigrynenko

Differential Revision: D2198318

Summary: This is the first of a series of diffs to get folly, fbthrift, and bistro to run on Ubuntu 12.04 LTS, which is what powers Travis CI.

It's important for folly to be easily usable with Travis CI, since everything C++ depends on it, and we really want all FB open-source projects to be monitored via continuous integration to avoid breaking their OSS builds.

Thanks to @int's work on `mcrouter`, this was considerably easier than it would have been otherwise.

This puts us a hop and a skip away from actually running folly's `make && make check && make install` on Travis CI. Do y'all think this is useful?

Reviewed By: @yfeldblum

Differential Revision: D2217441

Summary: Another stab at D2111063 now that we have the go ahead to actually open up the wangle github repo

Reviewed By: @djwatson, @mdordal

Differential Revision: D2178291

Summary: Drop those `const_cast<>` hacks.

Reviewed By: @ot

Differential Revision: D2217629

Summary: This is a documentation dump, with updates from the past couple weeks. Most notably, the new information about `Future<Unit>` replacing `Future<void>`.

Reviewed By: @​hannesr

Differential Revision: D2211135

Summary: [Folly] Lift thrift/lib/cpp/test/TNotificationQueueTest.

`NotificationQueue` is already moved into folly; move its accompanying test suite as well.

Reviewed By: @simpkins

Differential Revision: D2207104

Summary: Got this ifdef wrong in my last change here.

Reviewed By: @paulbiss

Differential Revision: D2213708

Summary: If you try to make a future or promise of `void`, you will get this nice error message telling you to use `Unit` instead.

Reviewed By: @djwatson

Differential Revision: D2211239

Summary: The Homebrew setup fails to compile on OSX.

Reviewed By: @paulbiss

Differential Revision: D2212084

Summary: [Folly] folly::Unit::Drop.

Antisymmetric to folly::Unit::Lift.

Reviewed By: @fugalh

Differential Revision: D2211725

Summary: Fix so `Timekeeper::at(now() - something)` works. Also introduce a test which explicitly tests when <= now codepath, which wasn't broken per se here, but which test also tickled this bug.

Reviewed By: @jsedgwick

Differential Revision: D2209166

Reviewed By: @yfeldblum

Differential Revision: D2209095

Summary: This is three codemods:

* `(folly::(Future|Promise|Try))<void>` -> `\1<folly::Unit>`
* `(Future|Promise|Try)<void>` -> `\1<Unit>`
* add `using folly::Unit` statements where needed

Then
* undo false positives in javascript files and fibers::Promise

cf D2201259, which this will land with

Reviewed By: @djwatson

Differential Revision: D2201801

Summary: Mostly this is `s/(Promise|Future|Try)<void>/\1<Unit>/`

Reviewed By: @djwatson

Differential Revision: D2201272

Summary: Nuke Future<void> in favor of Future<Unit>, for the `folly/futures` subdirectory.

Reviewed By: @djwatson

Differential Revision: D2201259

Summary: The current #if directive is a laundry list of
"strerror_r defaults to XSI style on these platforms",
and we keep missing some, so let's just do a proper test
and simplify the code directives.

Closes #232

Reviewed By: @paulbiss

Differential Revision: D2208843

Reviewed By: @yfeldblum

Differential Revision: D2209197

Summary: Implemented a BitVector Encoder and BitVector Reader with the same interface as EliasFanoCoding.h

Reviewed By: @ot, @philippv

Differential Revision: D2198935

Summary: Apparently this test sometimes fails. @Gownta suggests it's because we're
storing temproaries in StringPiece. Change it to store in a std::string, which
should hopefully fix it.

Reviewed By: @Gownta

Differential Revision: D2208643

Summary: More people are starting to use Rx. Yay! But they're trying to use `wangle/rx`. So make sure there's no doubt about its deprecated status.

Reviewed By: @yfeldblum

Differential Revision: D2196273

Summary: flock() expects sys/file.h which on many platforms
is getting included as a side-effect, but on at least one
this isn't the case.

Add the explicit include to fix builds on those platforms.

Closes #232

Facebook

Unrelated runtime failures.

Reviewed By: @JoelMarcey

Differential Revision: D2196306

Summary: When doing android development, we need to compile with
FOLLY_HAVE_BITS_FUNCTEXCEPT_H set for some flavors, and
FOLLY_HAVE_BITS_FUNCTEXCEPT_H unset for others (primarily for tests
run in the local (xcode) development platform).  This diff adds some
more conditionals so it all works.

In this repro, these files are never used, so this is more or less a
noop, but this is the upstream so I'm making these changes here.

Reviewed By: @Gownta

Differential Revision: D2202107

Summary: before the first setReadCallback(), the readCallback_ is nullptr.  Thanks @siyengar for pointing out this!

Reviewed By: @siyengar

Differential Revision: D2203489

Summary: refactor D2201181

Reviewed By: @afrind

Differential Revision: D2202245