first bits of a dynamc lib

lib/src/lib.rs

@@ -0,0 +1 @@
+pub mod storage;

lib/src/storage.rs

@@ -0,0 +1,16 @@
+use taskchampion::{storage::Storage, StorageConfig};
+
+pub struct StoragePtr(Box<dyn Storage>);
+
+#[no_mangle]
+pub extern "C" fn storage_new_in_memory() -> *mut StoragePtr {
+    // TODO: this is a box containing a fat pointer
+    Box::into_raw(Box::new(StoragePtr(
+        StorageConfig::InMemory.into_storage().unwrap(),
+    )))
+}
+
+#[no_mangle]
+pub extern "C" fn storage_free(storage: *mut StoragePtr) {
+    drop(unsafe { Box::from_raw(storage) });
+}