diff options
Diffstat (limited to 'library/std/src/sys_common/rwlock.rs')
-rw-r--r-- | library/std/src/sys_common/rwlock.rs | 71 |
1 files changed, 0 insertions, 71 deletions
diff --git a/library/std/src/sys_common/rwlock.rs b/library/std/src/sys_common/rwlock.rs deleted file mode 100644 index 042981dac..000000000 --- a/library/std/src/sys_common/rwlock.rs +++ /dev/null @@ -1,71 +0,0 @@ -use crate::sys::locks as imp; - -/// An OS-based reader-writer lock. -/// -/// This rwlock cleans up its resources in its `Drop` implementation and may -/// safely be moved (when not borrowed). -/// -/// This rwlock does not implement poisoning. -/// -/// This is either a wrapper around `LazyBox<imp::RwLock>` or `imp::RwLock`, -/// depending on the platform. It is boxed on platforms where `imp::RwLock` may -/// not be moved. -pub struct MovableRwLock(imp::MovableRwLock); - -impl MovableRwLock { - /// Creates a new reader-writer lock for use. - #[inline] - #[rustc_const_stable(feature = "const_locks", since = "1.63.0")] - pub const fn new() -> Self { - Self(imp::MovableRwLock::new()) - } - - /// Acquires shared access to the underlying lock, blocking the current - /// thread to do so. - #[inline] - pub fn read(&self) { - unsafe { self.0.read() } - } - - /// Attempts to acquire shared access to this lock, returning whether it - /// succeeded or not. - /// - /// This function does not block the current thread. - #[inline] - pub fn try_read(&self) -> bool { - unsafe { self.0.try_read() } - } - - /// Acquires write access to the underlying lock, blocking the current thread - /// to do so. - #[inline] - pub fn write(&self) { - unsafe { self.0.write() } - } - - /// Attempts to acquire exclusive access to this lock, returning whether it - /// succeeded or not. - /// - /// This function does not block the current thread. - #[inline] - pub fn try_write(&self) -> bool { - unsafe { self.0.try_write() } - } - - /// Unlocks previously acquired shared access to this lock. - /// - /// Behavior is undefined if the current thread does not have shared access. - #[inline] - pub unsafe fn read_unlock(&self) { - self.0.read_unlock() - } - - /// Unlocks previously acquired exclusive access to this lock. - /// - /// Behavior is undefined if the current thread does not currently have - /// exclusive access. - #[inline] - pub unsafe fn write_unlock(&self) { - self.0.write_unlock() - } -} |