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Implement reference counting (#592)

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This commit is contained in:
Daniel Wirtz
2019-06-05 23:15:39 +02:00
committed by GitHub
parent 3ed76a97f0
commit 0484a6b740
601 changed files with 261645 additions and 146131 deletions
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43
std/assembly/rt/common.ts Normal file
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// Alignment guarantees
// @ts-ignore: decorator
@inline export const AL_BITS: u32 = 4; // 16 bytes to fit up to v128
// @ts-ignore: decorator
@inline export const AL_SIZE: usize = 1 << <usize>AL_BITS;
// @ts-ignore: decorator
@inline export const AL_MASK: usize = AL_SIZE - 1;
// Extra debugging
// @ts-ignore: decorator
@inline export const DEBUG = true;
// ╒════════════════ Common block layout (32-bit) ═════════════════╕
// 3 2 1
// 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 bits
// ├─┴─┴─┴─┴─┴─┴─┴─┴─┴─┴─┴─┴─┴─┴─┴─┴─┴─┴─┴─┴─┴─┴─┴─┴─┴─┴─┴─┴─┴─┴─┴─┤
// │ MM info │ -16
// ├───────────────────────────────────────────────────────────────┤
// │ GC info │ -12
// ├───────────────────────────────────────────────────────────────┤
// │ runtime id │ -8
// ├───────────────────────────────────────────────────────────────┤
// │ runtime size │ -4
// ╞═══════════════════════════════════════════════════════════════╡
// │ ... │ ref
@unmanaged export class BLOCK {
/** Memory manager info. */
mmInfo: usize; // WASM64 needs adaption
/** Garbage collector info. */
gcInfo: u32;
/** Runtime class id. */
rtId: u32;
/** Runtime object size. */
rtSize: u32;
}
// @ts-ignore: decorator
@inline export const BLOCK_OVERHEAD = (offsetof<BLOCK>() + AL_MASK) & ~AL_MASK;
// @ts-ignore: decorator
@inline export const BLOCK_MAXSIZE: usize = (1 << 30) - BLOCK_OVERHEAD;