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layout rtti with fixed ids for buffers and strings

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This commit is contained in:
dcode
2019-05-22 00:14:44 +02:00
parent c92ca0d8cb
commit d94b4fca50
27 changed files with 7579 additions and 9975 deletions
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13
std/assembly/rt.ts
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@ -1,5 +1,4 @@
import { idof } from "./builtins";
import { RTTIData, RTTIFlags } from "./common/rtti";
import { Typeinfo, TypeinfoFlags } from "./shared/typeinfo";
import { E_INDEXOUTOFRANGE } from "./util/error";
import { BLOCK, BLOCK_OVERHEAD } from "./rt/common";
import { ArrayBufferView } from "./arraybuffer";
@ -18,10 +17,10 @@ export declare function __visit_members(ref: usize, cookie: u32): void;
// @ts-ignore: decorator
@unsafe
export function __typeinfo(id: u32): RTTIFlags {
export function __typeinfo(id: u32): TypeinfoFlags {
var ptr = RTTI_BASE;
if (!id || id > load<u32>(ptr)) throw new Error(E_INDEXOUTOFRANGE);
return changetype<RTTIData>(ptr + id * offsetof<RTTIData>()).flags;
if (id > load<u32>(ptr)) throw new Error(E_INDEXOUTOFRANGE);
return changetype<Typeinfo>(ptr + sizeof<u32>() + id * offsetof<Typeinfo>()).flags;
}
// @ts-ignore: decorator
@ -29,9 +28,9 @@ export function __typeinfo(id: u32): RTTIFlags {
export function __instanceof(ref: usize, superId: u32): bool { // keyword
var id = changetype<BLOCK>(ref - BLOCK_OVERHEAD).rtId;
var ptr = RTTI_BASE;
if (id && id <= load<u32>(ptr)) {
if (id <= load<u32>(ptr)) {
do if (id == superId) return true;
while (id = changetype<RTTIData>(ptr + id * offsetof<RTTIData>()).base);
while (id = changetype<Typeinfo>(ptr + sizeof<u32>() + id * offsetof<Typeinfo>()).base);
}
return false;
}