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#
#
# Nim's Runtime Library
# (c) Copyright 2017 Nim contributors
#
# See the file "copying.txt", included in this
# distribution, for details about the copyright.
#
type
AllocatorFlag* {.pure.} = enum ## flags describing the properties of the allocator
ThreadLocal ## the allocator is thread local only.
ZerosMem ## the allocator always zeros the memory on an allocation
Allocator* = ptr object {.inheritable.}
alloc*: proc (a: Allocator; size: int; alignment: int = 8): pointer {.nimcall.}
dealloc*: proc (a: Allocator; p: pointer; size: int) {.nimcall.}
realloc*: proc (a: Allocator; p: pointer; oldSize, newSize: int): pointer {.nimcall.}
flags*: set[AllocatorFlag]
var
localAllocator {.threadvar.}: Allocator
sharedAllocator: Allocator
proc getLocalAllocator*(): Allocator =
result = localAllocator
proc setLocalAllocator*(a: Allocator) =
localAllocator = a
proc getSharedAllocator*(): Allocator =
result = sharedAllocator
proc setSharedAllocator*(a: Allocator) =
sharedAllocator = a
when false:
proc alloc*(size: int; alignment: int = 8): pointer =
let a = getCurrentAllocator()
result = a.alloc(a, size, alignment)
proc dealloc*(p: pointer; size: int) =
let a = getCurrentAllocator()
a.dealloc(a, p, size)
proc realloc*(p: pointer; oldSize, newSize: int): pointer =
let a = getCurrentAllocator()
result = a.realloc(a, p, oldSize, newSize)
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