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Merge pull request #1817 from IanLilleyT/arena_allocation

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Improved arena allocation with alignment
This commit is contained in:
gingerBill
2022-06-02 10:53:23 +01:00
committed by GitHub
parent ba5f7c4e2a 66de1856e3
commit 174fa9b490
1 changed files with 5 additions and 4 deletions
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core/mem/allocators.odin
+5 -4
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@@ -52,15 +52,16 @@ arena_allocator_proc :: proc(allocator_data: rawptr, mode: Allocator_Mode,
switch mode { switch mode {
case .Alloc: case .Alloc:
total_size := size + alignment #no_bounds_check end := &arena.data[arena.offset]
ptr := align_forward(end, uintptr(alignment))
total_size := size + ptr_sub((^byte)(ptr), (^byte)(end))
if arena.offset + total_size > len(arena.data) { if arena.offset + total_size > len(arena.data) {
return nil, .Out_Of_Memory return nil, .Out_Of_Memory
} }
#no_bounds_check end := &arena.data[arena.offset]
ptr := align_forward(end, uintptr(alignment))
arena.offset += total_size arena.offset += total_size
arena.peak_used = max(arena.peak_used, arena.offset) arena.peak_used = max(arena.peak_used, arena.offset)
zero(ptr, size) zero(ptr, size)