diff options
Diffstat (limited to 'library/std/src/sys/windows/locks/rwlock.rs')
-rw-r--r-- | library/std/src/sys/windows/locks/rwlock.rs | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/library/std/src/sys/windows/locks/rwlock.rs b/library/std/src/sys/windows/locks/rwlock.rs new file mode 100644 index 000000000..fa5ffe574 --- /dev/null +++ b/library/std/src/sys/windows/locks/rwlock.rs @@ -0,0 +1,42 @@ +use crate::cell::UnsafeCell; +use crate::sys::c; + +pub struct RwLock { + inner: UnsafeCell<c::SRWLOCK>, +} + +pub type MovableRwLock = RwLock; + +unsafe impl Send for RwLock {} +unsafe impl Sync for RwLock {} + +impl RwLock { + #[inline] + pub const fn new() -> RwLock { + RwLock { inner: UnsafeCell::new(c::SRWLOCK_INIT) } + } + #[inline] + pub unsafe fn read(&self) { + c::AcquireSRWLockShared(self.inner.get()) + } + #[inline] + pub unsafe fn try_read(&self) -> bool { + c::TryAcquireSRWLockShared(self.inner.get()) != 0 + } + #[inline] + pub unsafe fn write(&self) { + c::AcquireSRWLockExclusive(self.inner.get()) + } + #[inline] + pub unsafe fn try_write(&self) -> bool { + c::TryAcquireSRWLockExclusive(self.inner.get()) != 0 + } + #[inline] + pub unsafe fn read_unlock(&self) { + c::ReleaseSRWLockShared(self.inner.get()) + } + #[inline] + pub unsafe fn write_unlock(&self) { + c::ReleaseSRWLockExclusive(self.inner.get()) + } +} |