| 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 { |
| 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()) |
| } |
| |
| #[inline] |
| pub unsafe fn destroy(&self) { |
| // ... |
| } |
| } |