feat: add pcap

__network/pcap/src/unique.rs

@@ -0,0 +1,43 @@
+#![allow(dead_code)]
+
+use std::fmt;
+use std::marker::PhantomData;
+use std::ops::Deref;
+
+pub struct Unique<T: ?Sized> {
+    pointer: *const T,
+    _marker: PhantomData<T>,
+}
+
+unsafe impl<T: Send + ?Sized> Send for Unique<T> {}
+unsafe impl<T: Sync + ?Sized> Sync for Unique<T> {}
+
+impl<T: ?Sized> Unique<T> {
+    pub unsafe fn new(ptr: *mut T) -> Unique<T> {
+        Unique {
+            pointer: ptr,
+            _marker: PhantomData,
+        }
+    }
+    pub unsafe fn get(&self) -> &T {
+        &*self.pointer
+    }
+    pub unsafe fn get_mut(&mut self) -> &mut T {
+        &mut ***self
+    }
+}
+
+impl<T: ?Sized> Deref for Unique<T> {
+    type Target = *mut T;
+
+    #[inline]
+    fn deref(&self) -> &*mut T {
+        unsafe { &*(&self.pointer as *const *const T as *const *mut T) }
+    }
+}
+
+impl<T> fmt::Pointer for Unique<T> {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        fmt::Pointer::fmt(&self.pointer, f)
+    }
+}