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50 lines
1.6 KiB
Nim
50 lines
1.6 KiB
Nim
#
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#
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# Nim's Runtime Library
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# (c) Copyright 2017 Nim contributors
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#
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# See the file "copying.txt", included in this
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# distribution, for details about the copyright.
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#
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type
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TypeLayout* = object
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size*, alignment*: int
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destructor*: proc (self: pointer; a: Allocator) {.nimcall.}
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trace*: proc (self: pointer; a: Allocator) {.nimcall.}
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when false:
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construct*: proc (self: pointer; a: Allocator) {.nimcall.}
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copy*, deepcopy*, sink*: proc (self, other: pointer; a: Allocator) {.nimcall.}
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Allocator* {.inheritable.} = ptr object
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alloc*: proc (a: Allocator; size: int; alignment = 8): pointer {.nimcall.}
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dealloc*: proc (a: Allocator; p: pointer; size: int) {.nimcall.}
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realloc*: proc (a: Allocator; p: pointer; oldSize, newSize: int): pointer {.nimcall.}
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visit*: proc (fieldAddr: ptr pointer; a: Allocator) {.nimcall.}
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#proc allocArray(a: Allocator; L, elem: TypeLayout; n: int): pointer
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#proc deallocArray(a: Allocator; p: pointer; L, elem: TypeLayout; n: int)
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proc getTypeLayout*(t: typedesc): ptr TypeLayout {.magic: "getTypeLayout".}
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var
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currentAllocator {.threadvar.}: Allocator
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proc getCurrentAllocator*(): Allocator =
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result = currentAllocator
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proc setCurrentAllocator*(a: Allocator) =
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currentAllocator = a
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proc alloc*(size: int): pointer =
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let a = getCurrentAllocator()
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result = a.alloc(a, size)
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proc dealloc*(p: pointer; size: int) =
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let a = getCurrentAllocator()
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a.dealloc(a, size)
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proc realloc*(p: pointer; oldSize, newSize: int): pointer =
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let a = getCurrentAllocator()
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result = a.realloc(a, oldSize, newSize)
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