default

Author: molpopgen

src/lib.rs

@@ -429,7 +429,7 @@ pub use individual_table::{IndividualTable, IndividualTableRow};
 pub use migration_table::{MigrationTable, MigrationTableRow};
 pub use mutation_table::{MutationTable, MutationTableRow};
 pub use node_table::{NodeTable, NodeTableRow};
-pub use population_table::{PopulationTable, PopulationTableRow};
+pub use population_table::{OwnedPopulationTable, PopulationTable, PopulationTableRow};
 pub use site_table::{SiteTable, SiteTableRow};
 pub use table_collection::TableCollection;
 pub use traits::IndividualLocation;

src/population_table.rs

@@ -116,10 +116,34 @@ impl<'a> PopulationTable<'a> {
     }
 }
 
+/// A standalone population table that owns its data.
+///
+/// # Examples
+///
+/// ```
+/// use tskit::OwnedPopulationTable;
+///
+/// let mut populations = OwnedPopulationTable::default();
+/// ```
 pub struct OwnedPopulationTable {
     table: mbox::MBox<ll_bindings::tsk_population_table_t>,
 }
 
+impl OwnedPopulationTable {
+    fn new() -> Self {
+        let temp = unsafe {
+            libc::malloc(std::mem::size_of::<ll_bindings::tsk_population_table_t>())
+                as *mut ll_bindings::tsk_population_table_t
+        };
+        let nonnull = match std::ptr::NonNull::<ll_bindings::tsk_population_table_t>::new(temp) {
+            Some(x) => x,
+            None => panic!("out of memory"),
+        };
+        let table = unsafe { mbox::MBox::from_non_null_raw(nonnull) };
+        Self { table }
+    }
+}
+
 impl std::ops::Deref for OwnedPopulationTable {
     type Target = PopulationTable<'static>;
 
@@ -128,3 +152,9 @@ impl std::ops::Deref for OwnedPopulationTable {
         unsafe { std::mem::transmute(&self.table) }
     }
 }
+
+impl Default for OwnedPopulationTable {
+    fn default() -> Self {
+        Self::new()
+    }
+}