src/libstd/sys/windows/rwlock.rs

   1 use cell::UnsafeCell;
   2 use sys::c;
   3
   4 pub struct RWLock { inner: UnsafeCell<c::SRWLOCK> }
   5
   6 unsafe impl Send for RWLock {}
   7 unsafe impl Sync for RWLock {}
   8
   9 impl RWLock {
  10     pub const fn new() -> RWLock {
  11         RWLock { inner: UnsafeCell::new(c::SRWLOCK_INIT) }
  12     }
  13     #[inline]
  14     pub unsafe fn read(&self) {
  15         c::AcquireSRWLockShared(self.inner.get())
  16     }
  17     #[inline]
  18     pub unsafe fn try_read(&self) -> bool {
  19         c::TryAcquireSRWLockShared(self.inner.get()) != 0
  20     }
  21     #[inline]
  22     pub unsafe fn write(&self) {
  23         c::AcquireSRWLockExclusive(self.inner.get())
  24     }
  25     #[inline]
  26     pub unsafe fn try_write(&self) -> bool {
  27         c::TryAcquireSRWLockExclusive(self.inner.get()) != 0
  28     }
  29     #[inline]
  30     pub unsafe fn read_unlock(&self) {
  31         c::ReleaseSRWLockShared(self.inner.get())
  32     }
  33     #[inline]
  34     pub unsafe fn write_unlock(&self) {
  35         c::ReleaseSRWLockExclusive(self.inner.get())
  36     }
  37
  38     #[inline]
  39     pub unsafe fn destroy(&self) {
  40         // ...
  41     }
  42 }