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runtime api

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dcode
2019-04-03 21:47:38 +02:00
parent cc1e4cd004
commit 85f3fc54a7
69 changed files with 1016 additions and 982 deletions
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11
std/assembly/util/runtime.ts
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@ -34,3 +34,14 @@ export const HEADER_MAGIC: u32 = 0xA55E4B17;
// @ts-ignore
@lazy
export const MAX_BYTELENGTH: i32 = MAX_SIZE_32 - HEADER_SIZE;
/** Adjusts an allocation to actual block size. Primarily targets TLSF. */
export function adjust(payloadSize: usize): usize {
// round up to power of 2, e.g. with HEADER_SIZE=8:
// 0 -> 2^3 = 8
// 1..8 -> 2^4 = 16
// 9..24 -> 2^5 = 32
// ...
// MAX_LENGTH -> 2^30 = 0x40000000 (MAX_SIZE_32)
return <usize>1 << <usize>(<u32>32 - clz<u32>(payloadSize + HEADER_SIZE - 1));
}