Adds the equivalent `nonpoison` types to the `poison::condvar` module.
These types and implementations are gated under the `nonpoison_condvar`
feature gate.

Signed-off-by: Connor Tsui <[email protected]>

Adds tests for the `nonpoison::Mutex` variant by using a macro to
duplicate the existing `poison` tests.

Note that all of the tests here are adapted from the existing `poison`
tests.

Also steals the `test_mutex_arc_condvar` test from `mutex.rs`.

Signed-off-by: Connor Tsui <[email protected]>

Signed-off-by: Connor Tsui <[email protected]>

Since `WaitTimeoutResult` is poison-agnostic, we want to use the same
type for both variants of `Condvar`.

Signed-off-by: Connor Tsui <[email protected]>

Signed-off-by: Connor Tsui <[email protected]>

Tracking issue: RUST-139201

Co-authored-by: omanirudh <[email protected]>

Inform compiler of optimizations when the base is known at compile time
and there's a cheaper method available:

* `{integer}.checked_ilog(2)` -> `{integer}.checked_ilog2()`
* `{integer}.checked_ilog(10)` -> `{integer}.checked_ilog10()`
* `{integer}.ilog(2)` -> `{integer}.ilog2()`
* `{integer}.ilog(10)` -> `{integer}.ilog10()`

…boet

fix(lib-std-fs): handle `usize` overflow in `read*`

I assume this is a non-breaking change, as there would be an OOM `panic` anyways. This patch ensures a fast-fail when there's not enough memory to load the file. This only changes behavior on platforms where `usize` is smaller than 64bits

…joboet

Implementation: `#[feature(nonpoison_condvar)]`

Tracking Issue: rust-lang#134645

This PR continues the effort made in rust-lang#144022 by adding the implementation of `nonpoison::condvar`.

Many of the changes here are similar to the changes made to implement `nonpoison::mutex`.

There are two other changes here. The first is that the `Barrier` implementation is migrated to use the `nonpoison::Condvar` instead of the `poison` variant. The second (which might be subject to some discussion) is that `WaitTimeoutResult` is moved up to `mod.rs`, as both `condvar` variants need that type (and I do not know if there is a better place to put it now).

### Related PRs

- `nonpoison_rwlock` implementation: rust-lang#144648
- `nonpoison_once` implementation: rust-lang#144653

…joboet

Stabilize `array_repeat` feature

This closes [tracking issue](rust-lang#126695) and stabilises `array::repeat`

…boet

Optimize `.ilog({2,10})` to `.ilog{2,10}()`

Optimize `.ilog({2,10})` to `.ilog{2,10}()`

Inform compiler of optimizations when the base is known at compile time and there's a cheaper method available:

* `{integer}.checked_ilog(2)` -> `{integer}.checked_ilog2()`
* `{integer}.checked_ilog(10)` -> `{integer}.checked_ilog10()`
* `{integer}.ilog(2)` -> `{integer}.ilog2()`
* `{integer}.ilog(10)` -> `{integer}.ilog10()`

…28, r=tgross35

Add Duration::from_nanos_u128

Feature Gate: `#![feature(duration_from_nanos_u128)]`
ACP: rust-lang/libs-team#567
Tracking issue: rust-lang#139201
Recreated from rust-lang#139243