feat(maitake): add maitake::sync::RwLock
#307
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This branch adds an async read-write lock implementation in `maitake::sync`. This lock is implemented using the `Semaphore` type added in #301. The rwlock is modeled using a `Semaphore` with `Semaphore::MAX_PERMITS` permits in it; a reader must acquire a single permit to gain read access, while a writer must acquire all the permits.
hawkw
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Sep 2, 2022
This branch builds on the `maitake::sync::RwLock` type added in #307 by adding `OwnedRwLockReadGuard` and `OwnedRwLockWriteGuard` types and `read_owned`/`write_owned`/`try_read_owned`/`try_write_owned` methods to `RwLock`, similar to the `lock_owned`/`OwnedMutexGuard` API for `maitake::sync::Mutex`. Unlike the `RwLock{Read, Write}Guard` types, which borrow a reference to the lock, the `Owned{Read, Write}Guard` types hold an `Arc` clone of the `RwLock` and are therefore valid for the `'static` lifetime. These methods are available when the `RwLock` is wrapped in an `Arc`, and therefore require `maitake`'s "alloc" feature flag to be enabled.
hawkw
added a commit
that referenced
this pull request
Sep 3, 2022
This branch builds on the `maitake::sync::RwLock` type added in #307 by adding `OwnedRwLockReadGuard` and `OwnedRwLockWriteGuard` types and `read_owned`/`write_owned`/`try_read_owned`/`try_write_owned` methods to `RwLock`, similar to the `lock_owned`/`OwnedMutexGuard` API for `maitake::sync::Mutex`. Unlike the `RwLock{Read, Write}Guard` types, which borrow a reference to the lock, the `Owned{Read, Write}Guard` types hold an `Arc` clone of the `RwLock` and are therefore valid for the `'static` lifetime. These methods are available when the `RwLock` is wrapped in an `Arc`, and therefore require `maitake`'s "alloc" feature flag to be enabled.
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This branch adds an async read-write lock implementation in
maitake::sync. This lock is implemented using theSemaphoretypeadded in #301. The rwlock is modeled using a
SemaphorewithSemaphore::MAX_PERMITSpermits in it; a reader must acquire a singlepermit to gain read access, while a writer must acquire all the permits.