Add a generic Ref type

1 files changed, 27 insertions, 0 deletions

diff --git a/openssl/src/types.rs b/openssl/src/types.rs
new file mode 100644
index 00000000..16829ea4
--- /dev/null
+++ b/openssl/src/types.rs
@@ -0,0 +1,27 @@
+use std::marker::PhantomData;
+
+use opaque::Opaque;
+
+pub unsafe trait OpenSslType {
+    type CType;
+
+    unsafe fn from_ptr(ptr: *mut Self::CType) -> Self;
+
+    fn as_ptr(&self) -> *mut Self::CType;
+}
+
+pub struct Ref<T>(Opaque, PhantomData<T>);
+
+impl<T: OpenSslType> Ref<T> {
+    pub unsafe fn from_ptr<'a>(ptr: *mut T::CType) -> &'a Ref<T> {
+        &*(ptr as *mut _)
+    }
+
+    pub unsafe fn from_ptr_mut<'a>(ptr: *mut T::CType) -> &'a mut Ref<T> {
+        &mut *(ptr as *mut _)
+    }
+
+    pub fn as_ptr(&self) -> *mut T::CType {
+        self as *const _ as *mut _
+    }
+}