Make sref::init use tryinc

f9f7aaef · Silas Boyd-Wickizer · ca568c2a · f9f7aaef
--- a/include/ref.hh
+++ b/include/ref.hh
@@ -11,13 +11,11 @@ public:
      ptr_->dec();
  }

-  void init(T* p) {
-    const T* save = ptr_;
+  bool init(T* p) {
+    if (ptr_ || !p->tryinc())
+      return false;
    ptr_ = p;
-    if (ptr_)
-      ptr_->inc();
-    if (save)
-      save->dec();
+    return true;
  }

  bool operator==(const sref<T>& pr) const { return ptr_ == pr.ptr_; }