--- /dev/null
+use rustc_span::symbol::{sym, Symbol};
+
+#[derive(Clone, Copy)]
+pub enum AllocatorKind {
+ Global,
+ Default,
+}
+
+impl AllocatorKind {
+ pub fn fn_name(&self, base: Symbol) -> String {
+ match *self {
+ AllocatorKind::Global => format!("__rg_{}", base),
+ AllocatorKind::Default => format!("__rdl_{}", base),
+ }
+ }
+}
+
+pub enum AllocatorTy {
+ Layout,
+ Ptr,
+ ResultPtr,
+ Unit,
+ Usize,
+}
+
+pub struct AllocatorMethod {
+ pub name: Symbol,
+ pub inputs: &'static [AllocatorTy],
+ pub output: AllocatorTy,
+}
+
+pub static ALLOCATOR_METHODS: &[AllocatorMethod] = &[
+ AllocatorMethod {
+ name: sym::alloc,
+ inputs: &[AllocatorTy::Layout],
+ output: AllocatorTy::ResultPtr,
+ },
+ AllocatorMethod {
+ name: sym::dealloc,
+ inputs: &[AllocatorTy::Ptr, AllocatorTy::Layout],
+ output: AllocatorTy::Unit,
+ },
+ AllocatorMethod {
+ name: sym::realloc,
+ inputs: &[AllocatorTy::Ptr, AllocatorTy::Layout, AllocatorTy::Usize],
+ output: AllocatorTy::ResultPtr,
+ },
+ AllocatorMethod {
+ name: sym::alloc_zeroed,
+ inputs: &[AllocatorTy::Layout],
+ output: AllocatorTy::ResultPtr,
+ },
+];