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refactor

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This commit is contained in:
dcode
2019-03-09 02:37:05 +01:00
parent 0c537c3363
commit 661e239fcb
4 changed files with 258 additions and 282 deletions
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29
std/assembly/internal/runtime.ts → std/assembly/runtime/index.ts
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@ -1,9 +1,8 @@
import { AL_MASK } from "./allocator";
import { AL_MASK } from "../internal/allocator";
import { __rt_classid } from "../builtins";
/** Common runtime header of all objects. */
@unmanaged
export class HEADER {
@unmanaged export class HEADER {
/** Unique id of the respective class or a magic value if not yet registered.*/
classId: u32;
/** Size of the allocated payload. */
@ -67,7 +66,10 @@ export function REALLOC(ref: usize, newPayloadSize: u32): usize {
let newRef = changetype<usize>(newHeader) + HEADER_SIZE;
memory.copy(newRef, ref, payloadSize);
memory.fill(newRef + payloadSize, 0, newPayloadSize - payloadSize);
memory.free(changetype<usize>(header));
if (header.classId == HEADER_MAGIC) {
// free right away if not registered yet
memory.free(changetype<usize>(header));
}
header = newHeader;
ref = newRef;
} else {
@ -83,20 +85,21 @@ export function REALLOC(ref: usize, newPayloadSize: u32): usize {
return ref;
}
/** Frees an object. Must not have been registered with GC yet. */
export function FREE(ref: usize): void {
function ensureUnregistered(ref: usize): HEADER {
assert(ref >= HEAP_BASE + HEADER_SIZE); // must be a heap object
var header = changetype<HEADER>(ref - HEADER_SIZE);
assert(header.classId == HEADER_MAGIC); // must be unregistered
memory.free(changetype<usize>(header));
return header;
}
/** Registers a managed object with GC. Cannot be changed anymore afterwards. */
export function REGISTER<T>(ref: usize, parentRef: usize): void {
assert(ref >= HEAP_BASE + HEADER_SIZE); // must be a heap object
var header = changetype<HEADER>(ref - HEADER_SIZE);
assert(header.classId == HEADER_MAGIC); // must be unregistered
header.classId = __rt_classid<T>();
/** Frees an object. Must not have been registered with GC yet. */
export function FREE(ref: usize): void {
memory.free(changetype<usize>(ensureUnregistered(ref)));
}
/** Registers a managed object with GC. Cannot be free'd anymore afterwards. */
@inline export function REGISTER<T>(ref: usize, parentRef: usize): void {
ensureUnregistered(ref).classId = __rt_classid<T>();
if (GC) __REGISTER_IMPL(ref, parentRef); // tslint:disable-line
}