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dcode
2019-03-27 14:43:35 +01:00
parent 3146f8f9e0
commit bb1609c9ea
91 changed files with 6426 additions and 11009 deletions
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7
std/assembly/collector/README.md
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@ -7,7 +7,7 @@ Common
------
* **__ref_collect**()<br />
Triggers a full garbage collection cycle.
Triggers a full garbage collection cycle. Also indicates the presence of a GC.
Tracing
-------
@ -24,14 +24,15 @@ Tracing
Reference counting
------------------
* **__ref_register**(ref: `usize`)<br />
Sets up a new reference. Implementation is optional for reference counting GCs.
* **__ref_retain**(ref: `usize`)<br />
Retains a reference, usually incrementing RC.
* **__ref_release**(ref: `usize`)<br />
Releases a reference, usually decrementing RC.
Reference counting may also implement `__ref_register` if necessary.
Typical patterns
----------------

18
std/assembly/collector/dummy.ts
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@ -1,8 +1,8 @@
// A dummy GC for looking at generated GC code without actually implementing it.
// A tracing dummy GC.
// @ts-ignore: decorator
@inline
const TRACE = false;
const TRACE = isDefined(GC_TRACE);
// @ts-ignore: decorator
@global @unsafe
@ -29,17 +29,3 @@ function __ref_link(ref: usize, parentRef: usize): void {
function __ref_unlink(ref: usize, parentRef: usize): void {
if (TRACE) trace("dummy.unlink", 2, ref, parentRef);
}
// Reference counting
// // @ts-ignore: decorator
// @global @unsafe
// function __ref_retain(ref: usize): void {
// if (TRACE) trace("dummy.retain", 1, ref);
// }
// // @ts-ignore: decorator
// @global @unsafe
// function __ref_release(ref: usize): void {
// if (TRACE) trace("dummy.release", 1, ref);
// }

29
std/assembly/collector/dummyrc.ts Normal file
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@ -0,0 +1,29 @@
// A reference counting dummy GC.
// @ts-ignore: decorator
@inline
const TRACE = isDefined(GC_TRACE);
// @ts-ignore: decorator
@global @unsafe
function __ref_register(ref: usize): void {
if (TRACE) trace("dummyrc.register", 1, ref);
}
// @ts-ignore: decorator
@global @unsafe
function __ref_collect(): void {
if (TRACE) trace("dummyrc.collect");
}
// @ts-ignore: decorator
@global @unsafe
function __ref_retain(ref: usize): void {
if (TRACE) trace("dummyrc.retain", 1, ref);
}
// @ts-ignore: decorator
@global @unsafe
function __ref_release(ref: usize): void {
if (TRACE) trace("dummyrc.release", 1, ref);
}

6
std/assembly/collector/itcm.ts
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@ -4,7 +4,7 @@
@inline
const TRACE = false;
import { ITERATEROOTS, HEADER_SIZE } from "../runtime";
import { iterateRoots, HEADER_SIZE } from "../runtime";
/** Collector states. */
const enum State {
@ -141,7 +141,7 @@ function step(): void {
}
case State.IDLE: {
if (TRACE) trace("gc~step/IDLE");
ITERATEROOTS((ref: usize): void => {
iterateRoots((ref: usize): void => {
var obj = refToObj(ref);
if (obj.color == white) obj.makeGray();
});
@ -165,7 +165,7 @@ function step(): void {
obj.hookFn(objToRef(obj));
} else {
if (TRACE) trace("gc~step/MARK finish");
ITERATEROOTS((ref: usize): void => {
iterateRoots((ref: usize): void => {
var obj = refToObj(ref);
if (obj.color == white) obj.makeGray();
});