Create README.md

Author: kolinfluence

README.md

@@ -0,0 +1,26 @@
+usage
+```
+package main
+
+import (
+	"fmt"
+	cxlockrw "github.com/cloudxaas/golock/rw"
+	"runtime"
+)
+
+func main() {
+	numShards := runtime.NumCPU() * 64
+	lock := cxlockrw.NewShardedRWLock(numShards)
+	defer lock.Close()
+
+	// Example usage of the sharded read-write lock
+	key := "exampleKey"
+	lock.RLock(key)
+	fmt.Println("Read operation under RLock")
+	lock.RUnlock(key)
+
+	lock.Lock(key)
+	fmt.Println("Write operation under Lock")
+	lock.Unlock(key)
+}
+```