Initial reorg.

This is largely the same as #305, but updated for the current tree.

crates/api/src/trampoline/memory.rs

@@ -0,0 +1,35 @@
+use alloc::boxed::Box;
+use alloc::string::ToString;
+use anyhow::Result;
+use cranelift_entity::PrimaryMap;
+use wasmtime_environ::Module;
+use wasmtime_runtime::InstanceHandle;
+
+use super::create_handle::create_handle;
+use crate::MemoryType;
+
+#[allow(dead_code)]
+
+pub fn create_handle_with_memory(memory: &MemoryType) -> Result<InstanceHandle> {
+    let mut module = Module::new();
+
+    let memory = cranelift_wasm::Memory {
+        minimum: memory.limits().min(),
+        maximum: if memory.limits().max() == core::u32::MAX {
+            None
+        } else {
+            Some(memory.limits().max())
+        },
+        shared: false, // TODO
+    };
+    let tunable = Default::default();
+
+    let memory_plan = wasmtime_environ::MemoryPlan::for_memory(memory, &tunable);
+    let memory_id = module.memory_plans.push(memory_plan);
+    module.exports.insert(
+        "memory".to_string(),
+        wasmtime_environ::Export::Memory(memory_id),
+    );
+
+    create_handle(module, None, PrimaryMap::new(), Box::new(()))
+}