リキ萌
01d4514a65
the goal is to rewrite haku completely, starting with the VM---because it was the most obvious point of improvement the reason is because Rust is kinda too verbose for low level stuff like this. compare the line numbers between haku1 and haku2's VM and how verbose those lines are, and it's kind of an insane difference it also feels like Zig's compilation model can work better for small wasm binary sizes and of course, I also just wanted an excuse to try out Zig :3
37 lines
1.3 KiB
Zig
37 lines
1.3 KiB
Zig
const std = @import("std");
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const mem = std.mem;
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extern fn __haku2_alloc(size: usize, alignment: usize) ?[*]u8;
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extern fn __haku2_realloc(ptr: [*]u8, size: usize, alignment: usize, new_size: usize) ?[*]u8;
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extern fn __haku2_dealloc(ptr: [*]u8, size: usize, alignment: usize) void;
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fn hostAlloc(_: *anyopaque, len: usize, alignment: mem.Alignment, _: usize) ?[*]u8 {
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return __haku2_alloc(len, alignment.toByteUnits());
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}
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fn hostResize(_: *anyopaque, memory: []u8, alignment: mem.Alignment, new_len: usize, _: usize) bool {
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// Rust doesn't have an API for resizing memory in place.
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// Callers will have to call remap instead.
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_ = memory;
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_ = alignment;
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_ = new_len;
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return false;
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}
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fn hostRemap(_: *anyopaque, memory: []u8, alignment: mem.Alignment, new_len: usize, _: usize) ?[*]u8 {
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return __haku2_realloc(memory.ptr, memory.len, alignment.toByteUnits(), new_len);
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}
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fn hostFree(_: *anyopaque, memory: []u8, alignment: mem.Alignment, _: usize) void {
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__haku2_dealloc(memory.ptr, memory.len, alignment.toByteUnits());
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}
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pub const hostAllocator = mem.Allocator{
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.ptr = undefined,
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.vtable = &mem.Allocator.VTable{
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.alloc = hostAlloc,
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.resize = hostResize,
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.remap = hostRemap,
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.free = hostFree,
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},
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};
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