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add non-zeroing append and resize

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This commit is contained in:
Colin Davidson
2023-12-04 00:08:13 -08:00
parent c5c46c5073
commit 58e4a011c7
8 changed files with 147 additions and 42 deletions
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core/os/os.odin
+7 -7
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@@ -210,15 +210,15 @@ heap_allocator_proc :: proc(allocator_data: rawptr, mode: mem.Allocator_Mode,
}
}
aligned_resize :: proc(p: rawptr, old_size: int, new_size: int, new_alignment: int) -> (new_memory: []byte, err: mem.Allocator_Error) {
aligned_resize :: proc(p: rawptr, old_size: int, new_size: int, new_alignment: int, zero_memory := true) -> (new_memory: []byte, err: mem.Allocator_Error) {
if p == nil {
return nil, nil
}
new_memory = aligned_alloc(new_size, new_alignment, p) or_return
new_memory = aligned_alloc(new_size, new_alignment, p, zero_memory) or_return
// NOTE: heap_resize does not zero the new memory, so we do it
if new_size > old_size {
if zero_memory && new_size > old_size {
new_region := mem.raw_data(new_memory[old_size:])
mem.zero(new_region, new_size - old_size)
}
@@ -235,16 +235,16 @@ heap_allocator_proc :: proc(allocator_data: rawptr, mode: mem.Allocator_Mode,
case .Free_All:
return nil, .Mode_Not_Implemented
case .Resize:
case .Resize, .Resize_Non_Zeroed:
if old_memory == nil {
return aligned_alloc(size, alignment)
return aligned_alloc(size, alignment, nil, mode == .Resize)
}
return aligned_resize(old_memory, old_size, size, alignment)
return aligned_resize(old_memory, old_size, size, alignment, mode == .Resize)
case .Query_Features:
set := (^mem.Allocator_Mode_Set)(old_memory)
if set != nil {
set^ = {.Alloc, .Alloc_Non_Zeroed, .Free, .Resize, .Query_Features}
set^ = {.Alloc, .Alloc_Non_Zeroed, .Free, .Resize, .Resize_Non_Zeroed, .Query_Features}
}
return nil, nil