diff options
Diffstat (limited to 'ctr-std/src/sys/wasm/rwlock.rs')
| -rw-r--r-- | ctr-std/src/sys/wasm/rwlock.rs | 82 |
1 files changed, 0 insertions, 82 deletions
diff --git a/ctr-std/src/sys/wasm/rwlock.rs b/ctr-std/src/sys/wasm/rwlock.rs deleted file mode 100644 index 6516010..0000000 --- a/ctr-std/src/sys/wasm/rwlock.rs +++ /dev/null @@ -1,82 +0,0 @@ -// Copyright 2017 The Rust Project Developers. See the COPYRIGHT -// file at the top-level directory of this distribution and at -// http://rust-lang.org/COPYRIGHT. -// -// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or -// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license -// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your -// option. This file may not be copied, modified, or distributed -// except according to those terms. - -use cell::UnsafeCell; - -pub struct RWLock { - mode: UnsafeCell<isize>, -} - -unsafe impl Send for RWLock {} -unsafe impl Sync for RWLock {} // no threads on wasm - -impl RWLock { - pub const fn new() -> RWLock { - RWLock { - mode: UnsafeCell::new(0), - } - } - - #[inline] - pub unsafe fn read(&self) { - let mode = self.mode.get(); - if *mode >= 0 { - *mode += 1; - } else { - rtabort!("rwlock locked for writing"); - } - } - - #[inline] - pub unsafe fn try_read(&self) -> bool { - let mode = self.mode.get(); - if *mode >= 0 { - *mode += 1; - true - } else { - false - } - } - - #[inline] - pub unsafe fn write(&self) { - let mode = self.mode.get(); - if *mode == 0 { - *mode = -1; - } else { - rtabort!("rwlock locked for reading") - } - } - - #[inline] - pub unsafe fn try_write(&self) -> bool { - let mode = self.mode.get(); - if *mode == 0 { - *mode = -1; - true - } else { - false - } - } - - #[inline] - pub unsafe fn read_unlock(&self) { - *self.mode.get() -= 1; - } - - #[inline] - pub unsafe fn write_unlock(&self) { - *self.mode.get() += 1; - } - - #[inline] - pub unsafe fn destroy(&self) { - } -} |