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dcode
2019-03-15 09:26:31 +01:00
parent 139cec0846
commit 968b0321a0
20 changed files with 619 additions and 557 deletions
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25
std/assembly/gc.ts
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@ -1,45 +1,30 @@
import { runtime } from "./runtime";
/** Garbage collector interface. */
export namespace gc {
/** Whether the garbage collector interface is implemented. */
// @ts-ignore: decorator
@lazy
export const implemented: bool = isDefined(
export const IMPLEMENTED: bool = isDefined(
// @ts-ignore: stub
__gc_register
);
/** Gets the computed unique class id of a class type. */
// @ts-ignore: decorator
@unsafe @builtin
export declare function classId<T>(): u32;
/** Iterates reference root objects. */
// @ts-ignore: decorator
@unsafe @builtin
export declare function iterateRoots(fn: (ref: usize) => void): void;
/** Registers a managed object to be tracked by the garbage collector. */
// @ts-ignore: decorator
@unsafe @inline
export function register<T>(ref: usize): T {
runtime.unrefUnregistered(ref).classId = classId<T>();
export function register(ref: usize): void {
// @ts-ignore: stub
if (isDefined(__gc_register)) __gc_register(ref);
return changetype<T>(ref);
else ERROR("missing implementation: gc.register");
}
/** Links a registered object with the registered object now referencing it. */
// @ts-ignore: decorator
@unsafe @inline
export function link<T, TParent>(ref: T, parentRef: TParent): void {
assert(changetype<usize>(ref) >= HEAP_BASE + runtime.Header.SIZE); // must be a heap object
var header = changetype<runtime.Header>(changetype<usize>(ref) - runtime.Header.SIZE);
assert(header.classId != runtime.Header.MAGIC && header.gc1 != 0 && header.gc2 != 0); // must be registered
export function link(ref: usize, parentRef: usize): void {
// @ts-ignore: stub
if (isDefined(__gc_link)) __gc_link(ref, parentRef);
else ERROR("missing implementation: gc.link");
}
/** Marks an object as being reachable. */