38 lines
1.3 KiB
Zig
38 lines
1.3 KiB
Zig
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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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