Travel3: Simple image and video display site

Reads the images and videos from filesystem and builds a site in
memroy.

1 files changed, 42 insertions, 0 deletions

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