X-Git-Url: http://git.bitcoin.ninja/index.cgi?a=blobdiff_plain;f=lightning%2Fsrc%2Fsync.rs;fp=lightning%2Fsrc%2Fsync.rs;h=bde547036536b479bcf181740e0ea31a7cf42ebb;hb=a0a3a6b204395a63647a7914f35077b117315b1d;hp=0000000000000000000000000000000000000000;hpb=002a5db5b07fd317545d3aa4f1a217cd40b608e2;p=rust-lightning

diff --git a/lightning/src/sync.rs b/lightning/src/sync.rs
new file mode 100644
index 00000000..bde54703
--- /dev/null
+++ b/lightning/src/sync.rs
@@ -0,0 +1,115 @@
+pub use ::alloc::sync::Arc;
+use core::ops::{Deref, DerefMut};
+use core::time::Duration;
+use core::cell::{RefCell, Ref, RefMut};
+
+pub type LockResult<Guard> = Result<Guard, ()>;
+
+pub struct Condvar {}
+
+impl Condvar {
+	pub fn new() -> Condvar {
+		Condvar { }
+	}
+
+	pub fn wait<'a, T>(&'a self, guard: MutexGuard<'a, T>) -> LockResult<MutexGuard<'a, T>> {
+		Ok(guard)
+	}
+
+	#[allow(unused)]
+	pub fn wait_timeout<'a, T>(&'a self, guard: MutexGuard<'a, T>, _dur: Duration) -> LockResult<(MutexGuard<'a, T>, ())> {
+		Ok((guard, ()))
+	}
+
+	pub fn notify_all(&self) {}
+}
+
+pub struct Mutex<T: ?Sized> {
+	inner: RefCell<T>
+}
+
+#[must_use = "if unused the Mutex will immediately unlock"]
+pub struct MutexGuard<'a, T: ?Sized + 'a> {
+	lock: RefMut<'a, T>,
+}
+
+impl<T: ?Sized> Deref for MutexGuard<'_, T> {
+	type Target = T;
+
+	fn deref(&self) -> &T {
+		&self.lock.deref()
+	}
+}
+
+impl<T: ?Sized> DerefMut for MutexGuard<'_, T> {
+	fn deref_mut(&mut self) -> &mut T {
+		self.lock.deref_mut()
+	}
+}
+
+impl<T> Mutex<T> {
+	pub fn new(inner: T) -> Mutex<T> {
+		Mutex { inner: RefCell::new(inner) }
+	}
+
+	pub fn lock<'a>(&'a self) -> LockResult<MutexGuard<'a, T>> {
+		Ok(MutexGuard { lock: self.inner.borrow_mut() })
+	}
+
+	pub fn try_lock<'a>(&'a self) -> LockResult<MutexGuard<'a, T>> {
+		Ok(MutexGuard { lock: self.inner.borrow_mut() })
+	}
+}
+
+pub struct RwLock<T: ?Sized> {
+	inner: RefCell<T>
+}
+
+pub struct RwLockReadGuard<'a, T: ?Sized + 'a> {
+	lock: Ref<'a, T>,
+}
+
+pub struct RwLockWriteGuard<'a, T: ?Sized + 'a> {
+	lock: RefMut<'a, T>,
+}
+
+impl<T: ?Sized> Deref for RwLockReadGuard<'_, T> {
+	type Target = T;
+
+	fn deref(&self) -> &T {
+		&self.lock.deref()
+	}
+}
+
+impl<T: ?Sized> Deref for RwLockWriteGuard<'_, T> {
+	type Target = T;
+
+	fn deref(&self) -> &T {
+		&self.lock.deref()
+	}
+}
+
+impl<T: ?Sized> DerefMut for RwLockWriteGuard<'_, T> {
+	fn deref_mut(&mut self) -> &mut T {
+		self.lock.deref_mut()
+	}
+}
+
+impl<T> RwLock<T> {
+	pub fn new(inner: T) -> RwLock<T> {
+		RwLock { inner: RefCell::new(inner) }
+	}
+
+	pub fn read<'a>(&'a self) -> LockResult<RwLockReadGuard<'a, T>> {
+		Ok(RwLockReadGuard { lock: self.inner.borrow() })
+	}
+
+	pub fn write<'a>(&'a self) -> LockResult<RwLockWriteGuard<'a, T>> {
+		Ok(RwLockWriteGuard { lock: self.inner.borrow_mut() })
+	}
+
+	pub fn try_write<'a>(&'a self) -> LockResult<RwLockWriteGuard<'a, T>> {
+		// There is no try, grasshopper - only used for tests and expected to fail
+		Err(())
+	}
+}