Yuki Okushi 578eb6d65f Rollup merge of #84687 - a1phyr:improve_rwlock, r=m-ou-se ...

Multiple improvements to RwLocks

This PR replicates #77147, #77380 and #84650 on RWLocks :
- Split `sys_common::RWLock` in `StaticRWLock` and `MovableRWLock`
- Unbox rwlocks on some platforms (Windows, Wasm and unsupported)
- Simplify `RwLock::into_inner`

Notes to reviewers :
- For each target, I copied `MovableMutex` to guess if `MovableRWLock` should be boxed.
- ~A comment says that `StaticMutex` is not re-entrant, I don't understand why and I don't know whether it applies to `StaticRWLock`.~

r? `@m-ou-se`

2021-06-10 11:02:10 +09:00

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alloc

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backtrace @ 221483ebaf

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core

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panic_abort

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panic_unwind

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proc_macro

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profiler_builtins

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rtstartup

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rustc-std-workspace-alloc

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rustc-std-workspace-core

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rustc-std-workspace-std

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std

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stdarch @ 37d6e18863

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term

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test

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unwind

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