as_raw/into_raw for structs

Adds methods to get the raw pointer to the libyang structures held by many structures. into_raw has been implemented where the struct manages the pointer (has a Drop impl to free/release the internal struture), and as_raw has been implemented where the struct is just a wrapper.
holo-routing · Dec 8, 2024 · 5cc7948 · 5cc7948
1 parent 4e5b2bd
commit 5cc7948
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Showing 3 changed files with 61 additions and 5 deletions.
diff --git a/src/context.rs b/src/context.rs
@@ -9,6 +9,7 @@
 use bitflags::bitflags;
 use std::collections::HashMap;
 use std::ffi::CString;
+use std::mem::ManuallyDrop;
 use std::os::raw::{c_char, c_void};
 use std::os::unix::ffi::OsStrExt;
 use std::path::Path;
@@ -112,6 +113,12 @@ impl Context {
         Ok(Context { raw: context })
     }
 
+    /// Returns a mutable raw pointer to the underlying C library representation
+    /// of the libyang context.
+    pub fn into_raw(self) -> *mut ffi::ly_ctx {
+        ManuallyDrop::new(self).raw
+    }
+
     /// Add the search path into libyang context.
     pub fn set_searchdir<P: AsRef<Path>>(
         &mut self,

diff --git a/src/data.rs b/src/data.rs
@@ -9,6 +9,7 @@
 use bitflags::bitflags;
 use std::ffi::CStr;
 use std::ffi::CString;
+use std::mem::ManuallyDrop;
 use std::os::raw::{c_char, c_void};
 use std::os::unix::io::AsRawFd;
 use std::slice;
@@ -384,6 +385,12 @@ impl<'a> DataTree<'a> {
         }
     }
 
+    /// Returns a mutable raw pointer to the underlying C library representation
+    /// of the root node of the YANG data tree.
+    pub fn into_raw(self) -> *mut ffi::lyd_node {
+        ManuallyDrop::new(self).raw
+    }
+
     /// Parse (and validate) input data as a YANG data tree.
     pub fn parse_file<F: AsRawFd>(
         context: &'a Context,
@@ -739,6 +746,12 @@ impl Drop for DataTree<'_> {
 // ===== impl DataNodeRef =====
 
 impl<'a, 'b> DataNodeRef<'a, 'b> {
+    /// Returns a mutable raw pointer to the underlying C library representation
+    /// of the data node reference.
+    pub fn into_raw(self) -> *mut ffi::lyd_node {
+        ManuallyDrop::new(self).raw
+    }
+
     /// Schema definition of this node.
     pub fn schema(&self) -> SchemaNode<'_> {
         let raw = unsafe { (*self.raw).schema };
@@ -936,7 +949,7 @@ impl<'a, 'b> DataNodeRef<'a, 'b> {
             ffi::lyd_new_inner(
                 self.raw(),
                 module
-                    .map(|module| module.raw())
+                    .map(|module| module.as_raw())
                     .unwrap_or(std::ptr::null_mut()),
                 name_cstr.as_ptr(),
                 0,
@@ -973,7 +986,7 @@ impl<'a, 'b> DataNodeRef<'a, 'b> {
             ffi::lyd_new_list2(
                 self.raw(),
                 module
-                    .map(|module| module.raw())
+                    .map(|module| module.as_raw())
                     .unwrap_or(std::ptr::null_mut()),
                 name_cstr.as_ptr(),
                 keys_cstr.as_ptr(),
@@ -1018,7 +1031,7 @@ impl<'a, 'b> DataNodeRef<'a, 'b> {
             ffi::lyd_new_list3(
                 self.raw(),
                 module
-                    .map(|module| module.raw())
+                    .map(|module| module.as_raw())
                     .unwrap_or(std::ptr::null_mut()),
                 name_cstr.as_ptr(),
                 keys.as_mut_ptr(),
@@ -1057,7 +1070,7 @@ impl<'a, 'b> DataNodeRef<'a, 'b> {
             ffi::lyd_new_term(
                 self.raw(),
                 module
-                    .map(|module| module.raw())
+                    .map(|module| module.as_raw())
                     .unwrap_or(std::ptr::null_mut()),
                 name_cstr.as_ptr(),
                 value_ptr,
@@ -1151,6 +1164,12 @@ unsafe impl Sync for DataNodeRef<'_, '_> {}
 // ===== impl Metadata =====
 
 impl<'a, 'b> Metadata<'a, 'b> {
+    /// Returns a mutable raw pointer to the underlying C library representation
+    /// of the data element metadata.
+    pub fn as_raw(&self) -> *mut ffi::lyd_meta {
+        self.raw
+    }
+
     /// Metadata name.
     pub fn name(&self) -> &str {
         char_ptr_to_str(unsafe { (*self.raw).name })

diff --git a/src/schema.rs b/src/schema.rs
@@ -173,7 +173,7 @@ pub enum DataValue {
 impl<'a> SchemaModule<'a> {
     /// Returns a mutable raw pointer to the underlying C library representation
     /// of the module.
-    pub(crate) fn raw(&self) -> *mut ffi::lys_module {
+    pub fn as_raw(&self) -> *mut ffi::lys_module {
         self.raw
     }
 
@@ -389,6 +389,12 @@ unsafe impl Sync for SchemaModule<'_> {}
 // ===== impl SchemaNode =====
 
 impl<'a> SchemaNode<'a> {
+    /// Returns a mutable raw pointer to the underlying C library representation
+    /// of the node.
+    pub fn as_raw(&self) -> *mut ffi::lysc_node {
+        self.raw
+    }
+
     #[doc(hidden)]
     fn check_flag(&self, flag: u32) -> bool {
         let flags = unsafe { (*self.raw).flags } as u32;
@@ -1000,6 +1006,12 @@ unsafe impl Sync for SchemaNode<'_> {}
 impl SchemaStmtMust<'_> {
     // TODO: XPath condition
 
+    /// Returns a mutable raw pointer to the underlying C library representation
+    /// of the must statement.
+    pub fn as_raw(&self) -> *mut ffi::lysc_must {
+        self.raw
+    }
+
     /// description substatement.
     pub fn description(&self) -> Option<&str> {
         char_ptr_to_opt_str(unsafe { (*self.raw).dsc })
@@ -1044,6 +1056,12 @@ unsafe impl Sync for SchemaStmtMust<'_> {}
 impl SchemaStmtWhen<'_> {
     // TODO: XPath condition
 
+    /// Returns a mutable raw pointer to the underlying C library representation
+    /// of the when statement.
+    pub fn as_raw(&self) -> *mut ffi::lysc_when {
+        self.raw
+    }
+
     /// description substatement.
     pub fn description(&self) -> Option<&str> {
         char_ptr_to_opt_str(unsafe { (*self.raw).dsc })
@@ -1077,6 +1095,12 @@ unsafe impl Sync for SchemaStmtWhen<'_> {}
 // ===== impl SchemaLeafType =====
 
 impl SchemaLeafType<'_> {
+    /// Returns a mutable raw pointer to the underlying C library representation
+    /// of the leaf type.
+    pub fn as_raw(&self) -> *mut ffi::lysc_type {
+        self.raw
+    }
+
     /// Returns the resolved base type.
     pub fn base_type(&self) -> DataValueType {
         let base_type = unsafe { (*self.raw).basetype };
@@ -1122,6 +1146,12 @@ unsafe impl Sync for SchemaLeafType<'_> {}
 // ===== impl SchemaExtInstance =====
 
 impl<'a> SchemaExtInstance<'a> {
+    /// Returns a mutable raw pointer to the underlying C library representation
+    /// of the extension instance.
+    pub fn as_raw(&self) -> *mut ffi::lysc_ext_instance {
+        self.raw
+    }
+
     /// Returns the optional extension's argument.
     pub fn argument(&self) -> Option<String> {
         let argument = unsafe { (*self.raw).argument };