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Hoist reused calculations out into variables

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Feoramund
2025-01-27 19:11:39 -05:00
parent 17b38c1bca
commit 76a2877d7d
1 changed files with 7 additions and 5 deletions
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12
base/runtime/heap_allocator_implementation.odin
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@@ -704,16 +704,18 @@ heap_slab_setup :: proc "contextless" (superpage: ^Heap_Superpage, rounded_size:
base_alignment := uintptr(min(HEAP_MAX_ALIGNMENT, rounded_size))
pointer_padding := (uintptr(base_alignment) - (uintptr(slab) + size_of(Heap_Slab) + HEAP_SECTOR_TYPES * uintptr(sectors) * size_of(uint))) & uintptr(base_alignment - 1)
slab_bitmap_base := uintptr(slab) + size_of(Heap_Slab)
total_byte_size_of_all_bitmaps := HEAP_SECTOR_TYPES * uintptr(sectors) * size_of(uint)
pointer_padding := (uintptr(base_alignment) - (slab_bitmap_base + total_byte_size_of_all_bitmaps)) & uintptr(base_alignment - 1)
// These bitmaps are placed at the end of the struct, one after the other.
slab.local_free = cast([^]uint)(uintptr(slab) + size_of(Heap_Slab))
slab.remote_free = cast([^]uint)(uintptr(slab) + size_of(Heap_Slab) + uintptr(sectors) * size_of(uint))
slab.local_free = cast([^]uint)(slab_bitmap_base)
slab.remote_free = cast([^]uint)(slab_bitmap_base + uintptr(sectors) * size_of(uint))
// This pointer is specifically aligned.
slab.data = (uintptr(slab) + size_of(Heap_Slab) + HEAP_SECTOR_TYPES * uintptr(sectors) * size_of(uint) + pointer_padding)
slab.data = (slab_bitmap_base + total_byte_size_of_all_bitmaps + pointer_padding)
assert_contextless(slab.data & (base_alignment-1) == 0, "Incorrect calculation for aligning Slab data pointer.")
assert_contextless(size_of(Heap_Slab) + HEAP_SECTOR_TYPES * sectors * size_of(uint) + bins * rounded_size < HEAP_SLAB_SIZE, "Slab internal allocation overlimit.")
assert_contextless(size_of(Heap_Slab) + int(total_byte_size_of_all_bitmaps) + bins * rounded_size < HEAP_SLAB_SIZE, "Slab internal allocation overlimit.")
assert_contextless(find_slab_from_pointer(rawptr(slab.data)) == slab, "Slab data pointer cannot be traced back to its Slab.")
// Set all of the local free bits.