| use crate::cell::UnsafeCell; |
| use crate::sys::c; |
| |
| pub struct RwLock { |
| inner: UnsafeCell<c::SRWLOCK>, |
| } |
| |
| 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 fn read(&self) { |
| unsafe { c::AcquireSRWLockShared(self.inner.get()) } |
| } |
| #[inline] |
| pub fn try_read(&self) -> bool { |
| unsafe { c::TryAcquireSRWLockShared(self.inner.get()) != 0 } |
| } |
| #[inline] |
| pub fn write(&self) { |
| unsafe { c::AcquireSRWLockExclusive(self.inner.get()) } |
| } |
| #[inline] |
| pub fn try_write(&self) -> bool { |
| unsafe { 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()) |
| } |
| } |