Module swc_common::sync

This module defines types which are thread safe if cfg!(feature = "concurrent") is true.

Lrc is an alias of either Rc or Arc.

Lock is a mutex. It internally uses parking_lot::Mutex if cfg!(parallel_queries) is true, RefCell otherwise.

RwLock is a read-write lock. It internally uses parking_lot::RwLock if cfg!(parallel_queries) is true, RefCell otherwise.

LockCell is a thread safe version of Cell, with set and get operations. It can never deadlock. It uses Cell when cfg!(parallel_queries) is false, otherwise it is a Lock.

MTLock is a mutex which disappears if cfg!(parallel_queries) is false.

MTRef is a immutable reference if cfg!(parallel_queries), and an mutable reference otherwise.

rustc_erase_owner! erases a OwningRef owner into Erased or Erased + Send + Sync depending on the value of cfg!(parallel_queries).

Structs

Lazy	A value which is initialized on the first access.
Lock
LockCell
LockGuard	A wrapper type for a mutably borrowed value from a RefCell<T>.
Lrc	A single-threaded reference-counting pointer. ‘Rc’ stands for ‘Reference Counted’.
MappedLockGuard	A wrapper type for a mutably borrowed value from a RefCell<T>.
MappedReadGuard	Wraps a borrowed reference to a value in a RefCell box. A wrapper type for an immutably borrowed value from a RefCell<T>.
MappedWriteGuard	A wrapper type for a mutably borrowed value from a RefCell<T>.
OnceCell	A cell which can be written to only once. It is not thread safe.
ReadGuard	Wraps a borrowed reference to a value in a RefCell box. A wrapper type for an immutably borrowed value from a RefCell<T>.
RwLock
Weak	Weak is a version of Rc that holds a non-owning reference to the managed allocation. The allocation is accessed by calling upgrade on the Weak pointer, which returns an Option<Rc<T>>.
WriteGuard	A wrapper type for a mutably borrowed value from a RefCell<T>.

Traits

HashMapExt
Send	Dummy trait because swc_common is in single thread mode.
Sync	Dummy trait because swc_common is in single thread mode.