chore: sync project files

server/concurrency/simplemutex.go

@@ -0,0 +1,30 @@
+package concurrency
+
+// SimpleMutex is a channel used for locking.
+type SimpleMutex chan struct{}
+
+// NewSimpleMutex creates and returns a new SimpleMutex object.
+func NewSimpleMutex() SimpleMutex {
+	return make(SimpleMutex, 1)
+}
+
+// Lock acquires a lock on the mutex.
+func (s SimpleMutex) Lock() {
+	s <- struct{}{}
+}
+
+// TryLock attempts to acquire a lock on the mutex.
+// Returns true if the lock has been acquired, false otherwise.
+func (s SimpleMutex) TryLock() bool {
+	select {
+	case s <- struct{}{}:
+		return true
+	default:
+		return false
+	}
+}
+
+// Unlock releases the mutex.
+func (s SimpleMutex) Unlock() {
+	<-s
+}