1 files changed, 36 insertions, 0 deletions
diff --git a/src/unique_fd.hh b/src/unique_fd.hh
new file mode 100644
index 0000000..2950905
--- /dev/null
+++ b/src/unique_fd.hh
@@ -0,0 +1,36 @@
+#ifndef UNIQUE_FD_HH
+#define UNIQUE_FD_HH
+
+class unique_fd {
+ public:
+  constexpr unique_fd() : fd_(-1) {}
+  explicit constexpr unique_fd(int fd) : fd_(fd) {}
+  unique_fd(unique_fd& fd) = delete;
+  unique_fd& operator=(unique_fd& fd) = delete;
+  unique_fd(unique_fd&& fd) : fd_(fd.release()) {}
+  unique_fd& operator=(unique_fd&& fd) {
+    reset(fd.release());
+    return *this;
+  }
+  ~unique_fd() { reset(); }
+
+  bool operator==(unique_fd const& fd) const { return get() == fd.get(); }
+  bool operator!=(unique_fd const& fd) const { return get() != fd.get(); }
+
+  int get() const { return fd_; }
+  explicit operator bool() const { return fd_ != -1; }
+  int operator*() const { return fd_; }
+
+  int release() {
+    int ret = fd_;
+    fd_ = -1;
+    return ret;
+  }
+
+  void reset(int fd = -1);
+
+ private:
+  int fd_;
+};
+
+#endif  // UNIQUE_FD_HH