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forward type alignment information to seqs (#12430)

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Arne Döring 2020-04-19 07:52:01 +02:00 • committed by GitHub
commit 4005f0d0e4
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25 changed files with 152 additions and 114 deletions
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17
lib/system/alloc.nim
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@ -45,7 +45,6 @@ type
data: TrunkBuckets
type
AlignType = BiggestFloat
FreeCell {.final, pure.} = object
next: ptr FreeCell # next free cell in chunk (overlaid with refcount)
when not defined(gcDestructors):
@ -68,16 +67,20 @@ type
freeList: ptr FreeCell
free: int # how many bytes remain
acc: int # accumulator for small object allocation
when defined(cpu32):
align: int
data: AlignType # start of usable memory
when defined(nimAlignPragma):
data {.align: MemAlign.}: UncheckedArray[byte] # start of usable memory
else:
data: UncheckedArray[byte]
BigChunk = object of BaseChunk # not necessarily > PageSize!
next, prev: PBigChunk # chunks of the same (or bigger) size
data: AlignType # start of usable memory
when defined(nimAlignPragma):
data {.align: MemAlign.}: UncheckedArray[byte] # start of usable memory
else:
data: UncheckedArray[byte]
template smallChunkOverhead(): untyped = sizeof(SmallChunk)-sizeof(AlignType)
template bigChunkOverhead(): untyped = sizeof(BigChunk)-sizeof(AlignType)
template smallChunkOverhead(): untyped = sizeof(SmallChunk)
template bigChunkOverhead(): untyped = sizeof(BigChunk)
# ------------- chunk table ---------------------------------------------------
# We use a PtrSet of chunk starts and a table[Page, chunksize] for chunk