More memory allocators

std/assembly/allocator/emscripten.ts

@@ -0,0 +1,20 @@
+///////////////////////// Emscripten Memory Allocator //////////////////////////
+
+// Uses Emscripten's exported _malloc and _free implementations, i.e., when
+// linking with Emscripten-compiled programs that already provide these.
+// Differs from 'system' in that their names are prefixed with an underscore.
+
+declare function _malloc(size: usize): usize;
+declare function _free(ptr: usize): void;
+
+export function allocate_memory(size: usize): usize {
+  return _malloc(size);
+}
+
+export function free_memory(ptr: usize): void {
+  _free(ptr);
+}
+
+export function reset_memory(): void {
+  throw new Error("not supported");
+}

std/assembly/allocator/system.ts

@@ -0,0 +1,19 @@
+/////////////////////////// System Memory Allocator ////////////////////////////
+
+// Uses the environment's malloc and free implementations, i.e., when linking
+// with other C-like programs that already provide these.
+
+declare function malloc(size: usize): usize;
+declare function free(ptr: usize): void;
+
+export function allocate_memory(size: usize): usize {
+  return malloc(size);
+}
+
+export function free_memory(ptr: usize): void {
+  free(ptr);
+}
+
+export function reset_memory(): void {
+  throw new Error("not supported");
+}

std/assembly/allocator/tlsf.ts

@@ -1,3 +1,5 @@
+////////////// TLSF (Two-Level Segregate Fit) Memory Allocator ////////////////
+
 // Re-export for now, so there's just one source file being worked on
 
 export {