From 6232d13f5321b87ddf12a1aa36b4545da45f173d Mon Sep 17 00:00:00 2001
From: Joel Klinghed <the_jk@spawned.biz>
Date: Wed, 17 Nov 2021 22:34:57 +0100
Subject: Travel3: Simple image and video display site

Reads the images and videos from filesystem and builds a site in
memroy.
---
 src/weak_ptr.hh | 42 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 42 insertions(+)
 create mode 100644 src/weak_ptr.hh

(limited to 'src/weak_ptr.hh')

diff --git a/src/weak_ptr.hh b/src/weak_ptr.hh
new file mode 100644
index 0000000..5859d0c
--- /dev/null
+++ b/src/weak_ptr.hh
@@ -0,0 +1,42 @@
+#ifndef WEAK_PTR_HH
+#define WEAK_PTR_HH
+
+#include <memory>
+
+template <typename T>
+class WeakPtr {
+public:
+  explicit WeakPtr(T* ptr)
+    : ptr_(ptr) {}
+
+  void unlink() {
+    ptr_ = nullptr;
+  }
+
+  T* get() {
+    return ptr_;
+  }
+
+private:
+  T* ptr_;
+};
+
+template<typename T>
+class WeakPtrOwner {
+public:
+  explicit WeakPtrOwner(T* ptr)
+    : ptr_(std::make_shared<WeakPtr<T>>(ptr)) {}
+
+  ~WeakPtrOwner() {
+    ptr_->unlink();
+  }
+
+  std::shared_ptr<WeakPtr<T>> get() {
+    return ptr_;
+  }
+
+private:
+  std::shared_ptr<WeakPtr<T>> ptr_;
+};
+
+#endif  // WEAK_PTR_HH
-- 
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