1 files changed, 45 insertions, 0 deletions
diff --git a/core/ops_builtin.rs b/core/ops_builtin.rs
new file mode 100644
index 000000000..5c74c7330
--- /dev/null
+++ b/core/ops_builtin.rs
@@ -0,0 +1,45 @@
+use crate::error::bad_resource_id;
+use crate::error::type_error;
+use crate::error::AnyError;
+use crate::resources::ResourceId;
+use crate::OpState;
+use crate::ZeroCopyBuf;
+
+// TODO(@AaronO): provide these ops grouped as a runtime extension
+// e.g:
+// pub fn init_builtins() -> Extension { ... }
+
+/// Return map of resources with id as key
+/// and string representation as value.
+///
+/// This op must be wrapped in `op_sync`.
+pub fn op_resources(
+  state: &mut OpState,
+  _args: (),
+  _zero_copy: Option<ZeroCopyBuf>,
+) -> Result<Vec<(ResourceId, String)>, AnyError> {
+  let serialized_resources = state
+    .resource_table
+    .names()
+    .map(|(rid, name)| (rid, name.to_string()))
+    .collect();
+  Ok(serialized_resources)
+}
+
+/// Remove a resource from the resource table.
+///
+/// This op must be wrapped in `op_sync`.
+pub fn op_close(
+  state: &mut OpState,
+  rid: Option<ResourceId>,
+  _zero_copy: Option<ZeroCopyBuf>,
+) -> Result<(), AnyError> {
+  // TODO(@AaronO): drop Option after improving type-strictness balance in serde_v8
+  let rid = rid.ok_or_else(|| type_error("missing or invalid `rid`"))?;
+  state
+    .resource_table
+    .close(rid)
+    .ok_or_else(bad_resource_id)?;
+
+  Ok(())
+}