Summary: This allows the test client to be used with session tickets enabled, if desired

Reviewed By: yfeldblum

Differential Revision: D25795104

fbshipit-source-id: 1adfb6c17c6da24db9c6367485a5cd0f8e534661

Summary:
Existing API allows user to specify a single preferred CPU for SQ_POLL workers,
but it also allows specifying multiple workers.

Add API to allow specifying a set of CPUs, not just one.

The specified set of CPUs are used in round-robin fashion, so it is not strictly
necessary that the number of CPUs and the number of workers be the same.

#forceTDHashing

Reviewed By: yfeldblum

Differential Revision: D26380317

fbshipit-source-id: ecfd8722670ffc3e3dc246fae1bcb7f4d8e6f3e4

Summary: Lower max submit so the test will not fail with EINVAL when SQ size is > CQ size

Reviewed By: kevin-vigor

Differential Revision: D26419746

fbshipit-source-id: f9cbd4bef06b314f43ab667646d9e5ef61999246

Summary: See title

Reviewed By: knekritz

Differential Revision: D26320388

fbshipit-source-id: 2796ae36cd8779f56474d21e89e80562f7bad22d

Summary: The `AsyncGenerator` test for `co_safe_point` immediately-invokes a temporary coroutine function to return a coroutine object, but the temporary coroutine function goes out of scope while the returned coroutine is live. Use `co_invoke` to fix it.

Reviewed By: lxfind

Differential Revision: D26408345

fbshipit-source-id: 4650ea57c01baffb1065560b661e3296cb0292cc

Summary:
The new version of googletest has a different internal API for registering test suites. This diff updates `CO_TEST_` to match the new version of googletest. I created this diff by copying the new version of `GTEST_TEST_` and adding the coroutine `co_TestBody`, just like in the old version of `CO_TEST_`.

~~There is a problem that I'd like reviewer's feedback on: how do we cleanly make the switch over to the new version of `CO_TEST_`? This change is tied to a specific version of googletest.~~

~~I have 2 ideas so far:~~

~~(Plan 1) Land this diff stacked on top of D25585021, so that we don't have to manage two versions at once.~~ Not possible

(Plan 2) Have two versions of `CO_TEST_` at the same time, but select which one to use based on a preprocessor macro defined in gtest.

Reviewed By: yfeldblum

Differential Revision: D26365504

fbshipit-source-id: 196c2277c7942163951f5781b334d0bff5c34de8

Summary:
Some use-cases of AsyncPipe may want to backpressure writers in the
case that readers start to slow down. Without backpressure, the queue
(and pending work) can essentially grow without bound, leading to OOMs
or starvation of other resources.

This implements a bounded channel primitive by layering a semaphore
in front of an existing AsyncPipe. It inherits similar cancellation behavior,
though pending writes must be canceled in the case that the read end is destroyed.

Reviewed By: iahs

Differential Revision: D26260278

fbshipit-source-id: a936cf021023b31a6db868e27e9855480a1dc405

Summary: Add io_uring SQ/CQ poll tests

Reviewed By: yfeldblum

Differential Revision: D26387632

fbshipit-source-id: 2b68fa4f9af41b76b90183a010f81a92537a6e3f

Summary: Remove `BaseFormatter::fbstr()` because it is virtually unused and those few cases that do use it are better off with `std::string`.

Reviewed By: yfeldblum

Differential Revision: D26358276

fbshipit-source-id: e96b4958735b3c9c03010e1e3dcdd01abd2d6a33

Summary:
Let the function passed to `EventBaseLocal::getOrCreateFn` directly return the value to be stored, rather than allocating it and returning a pointer.

Details of its storage should be internal to `EventBaseLocal` and should not leak out into the creator functions.

Differential Revision: D26246341

fbshipit-source-id: d72a62998985e42ef517eede3654324dc9f48709

Summary:
Remove `folly::writeTo` which is untested and virtually unused, replacing
```
folly::writeTo(
    stdout,
    folly::format(...));
```
with
```
fmt::print(...);
```
for better compatibility with C++20 `std::format`.

Reviewed By: yfeldblum

Differential Revision: D26326405

fbshipit-source-id: 598ec5d7906b2d36b20aa63f410a0c2621bc62fa

Summary:
removed double of word 'lock'

Pull Request resolved: https://github.com/facebook/folly/pull/1523

Reviewed By: yfeldblum

Differential Revision: D26367154

Pulled By: Orvid

fbshipit-source-id: 586647d28b9ad002ee975450426d2da967dc638e

Summary: There are lots of unnecessary uses of shared_ptr for type erasure where refcounting is not needed because it is trivial to convert to shared_ptr<void>, while it is more involved to make the equivalent unique_ptr. Adds a utility that hides the details to bring effort parity between the two pointer types.

Reviewed By: yfeldblum

Differential Revision: D26323443

fbshipit-source-id: e33c5378f7df3105c7cb97d2622dca351b866035

Summary: Add IoUringBackend support for openat, openat2, close, fallocate #forcetdhashing

Reviewed By: kevin-vigor

Differential Revision: D26325604

fbshipit-source-id: dbeea468ffbb324dc8c7afc1dbde1e451f72e06d

Summary:
Making it consistent with other *OnNextLine rules.

Also fixes really odd line breaks after the return type of some functions, for example:
```
template <typename M>
iterator
insert_or_assign(const_iterator /*hint*/, key_type const& key, M&& obj) {
```
becomes:
```
template <typename M>
iterator insert_or_assign(
    const_iterator /*hint*/, key_type const& key, M&& obj) {
```

Reviewed By: yfeldblum

Differential Revision: D25987579

fbshipit-source-id: cc24ea3db1b256f5563fb051fbd572adfccf556a

Summary:
On macOS, ninja only provides prebuilt Intel binaries, not arm64 ones. Since we
need to have a native arm64 ninja to be able to build binaries for the M1,
let's compile it from scratch on macOS too. Compiling it takes less than 30s so
it shouldn't add any notable cost to any builds.

Reviewed By: genevievehelsel

Differential Revision: D26322029

fbshipit-source-id: 1bbeeac2a3f0ba07c477a2b33f8878a91ccaec0e

Summary:
Combining CancellationTokens is a common pattern in user code, which requires the user to manage a CancellationSource and attach a callback per token to be merged:
```
    folly::CancellationSource source;

    folly::CancellationCallbacki cb1{
        std::move(token1), [&] { source.requestCancellation(); }};
    folly::CancellationCallback cb2{
        std::move(token2), [&] { source.requestCancellation(); }};
    ...

    co_await co_withCancellation(source.getToken(), ...);
```

This diff adds the functionality to folly:
```
    co_await co_withCancellation(folly::CancellationToken::merge(token1, token2, ...), ...);
```

This diff subclasses CancellationState for simplicity. If the extra vtable ptr is a concern, we can instead template CancellationState to combine them, but that would come with a compilation speed penalty.

Reviewed By: yfeldblum

Differential Revision: D26277772

fbshipit-source-id: 169f65b4cf8f7f10f2800fb7797bb09379ecc239

Summary: Fix the uncaught-exception termination message expectations in `folly/lang/ExceptionTest.cpp` under libc++.

Reviewed By: markisaa

Differential Revision: D26328622

fbshipit-source-id: 2e2f9fce93c65556508d99d1f7b80f0971f35c0c

Summary: Lower min capacity so the test succeeds when ulimit -l has a lower value

Reviewed By: yfeldblum

Differential Revision: D26321362

fbshipit-source-id: 9d2c41fbbc190f46a6174c3f847943e13f5bea6c

Summary: Removed deprecated folly format APIs.

Reviewed By: yfeldblum

Differential Revision: D26317507

fbshipit-source-id: 67f42d059088946a34e77c944befa4dcb24d8673

Summary:
I've been trying to get EdenFS to compile on an M1 mac, and openssl only
support these starting with 1.1.1i. From their changelog:

    *) Add support for Apple Silicon M1 Macs with the darwin64-arm64-cc target.
     [Stuart Carnie]

Let's start by upgrading openssl.

Reviewed By: fanzeyi

Differential Revision: D26318433

fbshipit-source-id: dfe1a06ee7061dfcd026b0347eb050155895ebd9

Summary: Reexport `coroutine_handle` from `folly/experimental/coro/Coroutine.h`, which wraps inclusion of `experimental/coroutine`.

Differential Revision: D26227588

fbshipit-source-id: 32cdb2b6d87e90065bf9f140716d63670c04db5f

Summary: Similar to XLOG_EVERY_MS but for formatted messages.

Reviewed By: yfeldblum

Differential Revision: D26296133

fbshipit-source-id: 92d2e240d70cf40b903f19b0350c6d9cc0daa1fb

Differential Revision: D26265450

fbshipit-source-id: 0cefa65feb3fc3b76c1b8b8a9059dc4d321c6751

Summary: ...to avoid additional `get()` call if we need the emplaced object right after.

Reviewed By: yfeldblum

Differential Revision: D26238594

fbshipit-source-id: a66396173a27ac684b403b3c0c576be50c39dde2

Summary: `getOrCreateFn()` is prone to undefined behavior as it returns `nullptr` reference if factory function returns a `nullptr` or empty `std::shared_ptr<T>`, or if `emplace(evb, nullptr)` is called. This diff adds `DCHECK`s to enforce non-nulls. Note that `getOrCreate()` is not affected as it uses `std::make_shared` under the hood that is guaranteed to have a new object constructed.

Differential Revision: D26246552

fbshipit-source-id: b7bc7164841b70fc0889c782438bf96a61857bbd

Summary: EdenFS has a use-case for this macro but with 10+ arguments. Raise the maximum number of arguments from 7 to 15 to permit this.

Reviewed By: yfeldblum

Differential Revision: D26268587

fbshipit-source-id: be0b0579d854a93dc2983706a253370fe05905df

Summary: Add support for io_uring min capacity. This should allow us to create io_uring instances even memory is fragmented and the kernel cannot allocate contiguous physical memory for capacity CQ entries (SQ is usually much smaller).

Reviewed By: kevin-vigor

Differential Revision: D26252442

fbshipit-source-id: f4e3bd4f00d21321b77d4e1452400689dbca1073

Summary: Add `XLOG_FIRST_N` log function.

Reviewed By: simpkins

Differential Revision: D26184283

fbshipit-source-id: 23081f759897bbf7949ce603f8e5edb29869b40d

Summary: Remove FOLLY_UNLIKELY from IoUringBackend::eb_event_base_loop

Reviewed By: yfeldblum

Differential Revision: D26272113

fbshipit-source-id: de280347908e5448cc97ffc1e1be3100cf6cd4b1

Summary: Reexport `suspend_always`, `suspend_never` from `folly/experimental/coro/Coroutine.h`, which wraps inclusion of `experimental/coroutine`.

Differential Revision: D26215623

fbshipit-source-id: 5dbe5dba67e0c4dcb5a54b00753937c39833d3a7

Summary: Rely on C++17 syntactic copy elision in `DelayedInit` to simplify and write `try_emplace` in terms of `try_emplace_with`.

Reviewed By: praihan

Differential Revision: D26260351

fbshipit-source-id: 590fdfed55ee325ed8a8ae4fa68c1db0bebf1545

Summary: Move the libfmt portability code into `folly/portability/` and revise it only to mutate folly's namespace.

Reviewed By: Orvid

Differential Revision: D26182824

fbshipit-source-id: e0b72f523dfeac7ff7799ff2104a1146032dfbf3

Summary: Let folly coro headers always be buildable whether or not coroutines are available. They may just be empty apart from transitive includes.

Reviewed By: iahs

Differential Revision: D26191449

fbshipit-source-id: 5865ce5edb13f97624b9f60c45c045886fdf0bfb

Summary:
Currently, when C++ threads communicate with python's event loop, they place
the items on the queue, notify the event loop, and when even loops starts
running, they would consume all items from this queue at once.
The downside of this approach is that we are unable to deprioritize the
upstream tasks to yield to internal python tasks. However, such ability to yield
is fundamental to how Thrift approaches load shedding under overload.
In this diff we change the approach to take only a single item from the queue at a
time. Notice that if queue is not emptied, the consumer will notify the event loop to
consume from this queue on the next iteration of the loop.

Reviewed By: zhxchen17

Differential Revision: D26228933

fbshipit-source-id: 827d21df12b65d518109151cb150cd45e513da57

Summary:
Tweaks to `folly::DelayedInit`:
* No potential for ambiguity in placement-new by using `::new` and casting the address to `void*`.
* Helper functions `slot` and `store` simplify `try_emplace_with` and `try_emplace`.
* `try_emplace_with` and `try_emplace` are no longer `const`-qualified, removing the need for `mutable` qualifiers.

The emplacement members should not be `const`-qualified since they are not semantically non-modifying. The `const` qualifier signals semantic non-modification. While it is the case that there are customs around `const` qualifiers and concurrency, these customs are not the core meaning of `const`.

Reviewed By: praihan

Differential Revision: D25919779

fbshipit-source-id: 95e5c4b4abf5285fbb00dddda1192998baf6ee59

Summary:
The change aims to make it easier to catch user bugs of using the map during or after its destruction in optimized modes without ASAN.

The changes are:
- Clear the buckets_ and chunks_ pointers in the corresponding destructors.
- Add DCHECK-s of buckets_ (or chunks_) in other member functions when non-null values are expected.

Reviewed By: davidtgoldblatt

Differential Revision: D26232735

fbshipit-source-id: 14f0c11e10997773efb78c7275db99932dd19703

Summary:
When modifying code that lacks alternative variations, there is only a 'HEAD' benchmark - so it can be useful to keep a version of these results for latter printing in the format of a relative benchmark.

Add a new flag to simplify this use-case,
--bm_relative_to: A flag taking the path to a JSON-verbose formatted dump, which will be used when printing (in non-JSON-mode) to produce output relative to the provided prior dump.

Usage:
- generate a JSON benchmark dump, use "--bm_json_verbose"
  $ your_benchmark_binary --benchmark --bm_json_verbose  old-json
- run a benchmark printing a comparison to an old dump:
  $ your_benchmark_binary --benchmark --bm_relative_to old-json

Note: You can also use bm_json_verbose and bm_relative_to at the same time, this will print relative results and update the JSON dump

Reviewed By: luciang

Differential Revision: D26214397

fbshipit-source-id: 8134b74604b7bb5037934205e8eee5e3ffc27f15

Summary: If `T` is greater than 4-byte aligned, then `compact_once_flag` brings no size improvements. We can use `once_flag` in these cases, which has a better mutex (`folly::SharedMutex` rather than `folly::MicroLock`).

Reviewed By: yfeldblum

Differential Revision: D26214262

fbshipit-source-id: ea15376ea892df42cc9d3a6eac3da458fe0564a8

Summary: Original commit changeset: 149b780350bf

Reviewed By: zaxy78

Differential Revision: D26222637

fbshipit-source-id: 29bc017be6619165cbd497c27c7843fd95e345b1