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external gc interface

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dcode
2019-03-28 11:07:47 +01:00
parent 41abc0166c
commit 0dcfcc7935
8 changed files with 2573 additions and 17 deletions
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36
std/assembly/gc.ts
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@ -1,16 +1,48 @@
/// <reference path="./collector/index.d.ts" />
import { E_NOTIMPLEMENTED } from "./util/error";
// @ts-ignore
@lazy
var GC_ROOT = new Set<usize>();
/** Garbage collector interface. */
export namespace gc {
/** Whether the garbage collector interface is implemented. */
// @ts-ignore: decorator
@lazy
export const IMPLEMENTED: bool = isDefined(__ref_collect);
export const implemented: bool = isDefined(__ref_collect);
/** Performs a full garbage collection cycle. */
export function collect(): void {
if (isDefined(__ref_collect)) __ref_collect();
else WARNING("missing implementation: gc.collect");
else throw new Error(E_NOTIMPLEMENTED);
}
/** Retains a reference, making sure that it doesn't become collected. */
export function retain(ref: usize): void {
var root = GC_ROOT;
if (!root.has(ref)) {
root.add(ref);
if (implemented) {
if (isDefined(__ref_link)) __ref_link(ref, changetype<usize>(root));
else if (isDefined(__ref_retain)) __ref_retain(ref);
else assert(false);
}
}
}
/** Releases a reference, allowing it to become collected. */
export function release(ref: usize): void {
var root = GC_ROOT;
if (root.has(ref)) {
root.delete(ref);
if (implemented) {
if (isDefined(__ref_link)) __ref_unlink(ref, changetype<usize>(root));
else if (isDefined(__ref_retain)) __ref_release(ref);
else assert(false);
}
}
}
}