feat(versionable): impl Versionize for Arc

tfhe/Cargo.toml

@@ -17,7 +17,7 @@ exclude = [
     "/js_on_wasm_tests/",
     "/web_wasm_parallel_tests/",
 ]
-rust-version = "1.75"
+rust-version = "1.76"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 

tfhe/src/high_level_api/backward_compatibility/keys.rs

@@ -1,4 +1,6 @@
-use serde::{Deserialize, Serialize};
+use std::convert::Infallible;
+use std::sync::Arc;
+
 use tfhe_versionable::{Upgrade, Version, VersionsDispatch};
 
 use crate::high_level_api::keys::*;
@@ -8,16 +10,27 @@ pub enum ClientKeyVersions {
     V0(ClientKey),
 }
 
-#[derive(Serialize)]
-#[cfg_attr(tfhe_lints, allow(tfhe_lints::serialize_without_versionize))]
-pub enum ServerKeyVersioned<'vers> {
-    V0(ServerKeyVersion<'vers>),
+// This type was previously versioned using a manual implementation with a conversion
+// to a type where the inner key was name `integer_key`
+#[derive(Version)]
+pub struct ServerKeyV0 {
+    pub(crate) integer_key: Arc<IntegerServerKey>,
 }
 
-#[derive(Serialize, Deserialize)]
-#[cfg_attr(tfhe_lints, allow(tfhe_lints::serialize_without_versionize))]
-pub enum ServerKeyVersionedOwned {
-    V0(ServerKeyVersionOwned),
+impl Upgrade<ServerKey> for ServerKeyV0 {
+    type Error = Infallible;
+
+    fn upgrade(self) -> Result<ServerKey, Self::Error> {
+        Ok(ServerKey {
+            key: self.integer_key,
+        })
+    }
+}
+
+#[derive(VersionsDispatch)]
+pub enum ServerKeyVersions {
+    V0(ServerKeyV0),
+    V1(ServerKey),
 }
 
 #[derive(VersionsDispatch)]

tfhe/src/high_level_api/keys/mod.rs

@@ -13,7 +13,7 @@ pub use public::{CompactPublicKey, CompressedCompactPublicKey, CompressedPublicK
 #[cfg(feature = "gpu")]
 pub use server::CudaServerKey;
 pub use server::{CompressedServerKey, ServerKey};
-pub(crate) use server::{InternalServerKey, ServerKeyVersion, ServerKeyVersionOwned};
+pub(crate) use server::InternalServerKey;
 
 pub(in crate::high_level_api) use inner::{
     IntegerClientKey, IntegerCompactPublicKey, IntegerCompressedCompactPublicKey,

tfhe/src/high_level_api/keys/server.rs

@@ -1,7 +1,7 @@
-use tfhe_versionable::{Unversionize, Versionize, VersionizeOwned};
+use tfhe_versionable::Versionize;
 
 use crate::backward_compatibility::keys::{
-    CompressedServerKeyVersions, ServerKeyVersioned, ServerKeyVersionedOwned,
+    CompressedServerKeyVersions, ServerKeyVersions,
 };
 #[cfg(feature = "gpu")]
 use crate::core_crypto::gpu::{synchronize_devices, CudaStreams};
@@ -23,7 +23,8 @@ use super::ClientKey;
 // Keys are stored in an Arc, so that cloning them is cheap
 // (compared to an actual clone hundreds of MB / GB), and cheap cloning is needed for
 // multithreading with less overhead)
-#[derive(Clone)]
+#[derive(Clone, Versionize)]
+#[versionize(ServerKeyVersions)]
 pub struct ServerKey {
     pub(crate) key: Arc<IntegerServerKey>,
 }
@@ -136,52 +137,6 @@ impl<'de> serde::Deserialize<'de> for ServerKey {
     }
 }
 
-#[derive(serde::Serialize)]
-#[cfg_attr(tfhe_lints, allow(tfhe_lints::serialize_without_versionize))]
-pub struct ServerKeyVersion<'vers> {
-    pub(crate) integer_key: <IntegerServerKey as Versionize>::Versioned<'vers>,
-}
-
-#[derive(serde::Serialize, serde::Deserialize)]
-#[cfg_attr(tfhe_lints, allow(tfhe_lints::serialize_without_versionize))]
-pub struct ServerKeyVersionOwned {
-    pub(crate) integer_key: <IntegerServerKey as VersionizeOwned>::VersionedOwned,
-}
-
-impl Versionize for ServerKey {
-    type Versioned<'vers> = ServerKeyVersioned<'vers>;
-
-    fn versionize(&self) -> Self::Versioned<'_> {
-        ServerKeyVersioned::V0(ServerKeyVersion {
-            integer_key: self.key.versionize(),
-        })
-    }
-}
-
-impl VersionizeOwned for ServerKey {
-    type VersionedOwned = ServerKeyVersionedOwned;
-
-    fn versionize_owned(self) -> Self::VersionedOwned {
-        ServerKeyVersionedOwned::V0(ServerKeyVersionOwned {
-            integer_key: (*self.key).clone().versionize_owned(),
-        })
-    }
-}
-
-impl Unversionize for ServerKey {
-    fn unversionize(
-        versioned: Self::VersionedOwned,
-    ) -> Result<Self, tfhe_versionable::UnversionizeError> {
-        match versioned {
-            ServerKeyVersionedOwned::V0(v0) => {
-                IntegerServerKey::unversionize(v0.integer_key).map(|unversioned| Self {
-                    key: Arc::new(unversioned),
-                })
-            }
-        }
-    }
-}
-
 /// Compressed ServerKey
 ///
 /// A CompressedServerKey takes much less disk space / memory space than a

utils/tfhe-versionable/Cargo.toml

@@ -8,6 +8,7 @@ documentation = "https://docs.rs/tfhe_versionable"
 repository = "https://github.com/zama-ai/tfhe-rs"
 license = "BSD-3-Clause-Clear"
 description = "tfhe-versionable: Add versioning informations/backward compatibility on rust types used for serialization"
+rust-version = "1.76"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 

utils/tfhe-versionable/src/lib.rs

@@ -14,6 +14,7 @@ use num_complex::Complex;
 use std::convert::Infallible;
 use std::fmt::Display;
 use std::marker::PhantomData;
+use std::sync::Arc;
 
 pub use derived_traits::{Version, VersionsDispatch};
 pub use upgrade::Upgrade;
@@ -361,6 +362,32 @@ impl<T> Unversionize for PhantomData<T> {
 
 impl<T> NotVersioned for PhantomData<T> {}
 
+impl<T: Versionize> Versionize for Arc<T> {
+    type Versioned<'vers> = T::Versioned<'vers>
+    where
+        T: 'vers;
+
+    fn versionize(&self) -> Self::Versioned<'_> {
+        self.as_ref().versionize()
+    }
+}
+
+impl<T: VersionizeOwned + Clone> VersionizeOwned for Arc<T> {
+    type VersionedOwned = T::VersionedOwned;
+
+    fn versionize_owned(self) -> Self::VersionedOwned {
+        Arc::unwrap_or_clone(self).versionize_owned()
+    }
+}
+
+impl<T: Unversionize + Clone> Unversionize for Arc<T> {
+    fn unversionize(versioned: Self::VersionedOwned) -> Result<Self, UnversionizeError> {
+        Ok(Arc::new(T::unversionize(versioned)?))
+    }
+}
+
+impl<T: NotVersioned> NotVersioned for Arc<T> {}
+
 impl<T: Versionize> Versionize for Complex<T> {
     type Versioned<'vers> = Complex<T::Versioned<'vers>> where T: 'vers;