rust: sync: introduce `CondVar`
authorWedson Almeida Filho <walmeida@microsoft.com>
Sun, 26 Mar 2023 03:57:38 +0000 (00:57 -0300)
committerMiguel Ojeda <ojeda@kernel.org>
Fri, 21 Apr 2023 23:46:45 +0000 (01:46 +0200)
commit19096bce815716cf93fc1ef3965629c3affa26f1
treebb4d7969a0b433979d3f4a5b64ac2cc50d76078d
parente32cca32c3d452a277884502b9155f3325caf80e
rust: sync: introduce `CondVar`

This is the traditional condition variable or monitor synchronisation
primitive. It is implemented with C's `wait_queue_head_t`.

It allows users to release a lock and go to sleep while guaranteeing
that notifications won't be missed. This is achieved by enqueuing a wait
entry before releasing the lock.

Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Will Deacon <will@kernel.org>
Cc: Waiman Long <longman@redhat.com>
Reviewed-by: Martin Rodriguez Reboredo <yakoyoku@gmail.com>
Signed-off-by: Wedson Almeida Filho <walmeida@microsoft.com>
Reviewed-by: Alice Ryhl <aliceryhl@google.com>
Link: https://lore.kernel.org/r/20230411054543.21278-12-wedsonaf@gmail.com
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
rust/bindings/bindings_helper.h
rust/helpers.c
rust/kernel/sync.rs
rust/kernel/sync/condvar.rs [new file with mode: 0644]
rust/kernel/sync/lock.rs