Give replace a return value

propensive · Mar 18, 2024 · 1e53a17 · 1e53a17
1 parent 6edc62d
commit 1e53a17
Showing 1 changed file with 5 additions and 2 deletions.
diff --git a/src/core/feudalism.scala b/src/core/feudalism.scala
@@ -56,16 +56,19 @@ class Mutex[ValueType](initial: ValueType):
       count = 0
       notify()
 
-  def replace(lambda: ValueType => ValueType): Unit =
+  def replace(lambda: ValueType => ValueType): ValueType =
     synchronized:
       while count != 0 do wait()
       count = -1
 
     value = lambda(value)
-
+    val result = value
+
     synchronized:
       count = 0
       notify()
+
+    result
 
 class Semaphore():
   private var count: Int = 0