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threadsafe cycle collection for Nim, the mm:yrc mode

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araq
2026-02-08 00:32:30 +01:00
parent 513c9aa69a
commit 6aecdaef03
10 changed files with 470 additions and 33 deletions
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10
lib/system.nim
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@@ -125,7 +125,7 @@ proc unsafeAddr*[T](x: T): ptr T {.magic: "Addr", noSideEffect.} =
const ThisIsSystem = true
const arcLikeMem = defined(gcArc) or defined(gcAtomicArc) or defined(gcOrc)
const arcLikeMem = defined(gcArc) or defined(gcAtomicArc) or defined(gcOrc) or defined(gcYrc)
when defined(nimAllowNonVarDestructor) and arcLikeMem:
proc new*[T](a: var ref T, finalizer: proc (x: T) {.nimcall.}) {.
@@ -356,7 +356,7 @@ proc low*(x: string): int {.magic: "Low", noSideEffect.}
## See also:
## * `high(string) <#high,string>`_
when not defined(gcArc) and not defined(gcOrc) and not defined(gcAtomicArc):
when not defined(gcArc) and not defined(gcOrc) and not defined(gcYrc) and not defined(gcAtomicArc):
proc shallowCopy*[T](x: var T, y: T) {.noSideEffect, magic: "ShallowCopy".}
## Use this instead of `=` for a `shallow copy`:idx:.
##
@@ -407,7 +407,7 @@ when defined(nimHasDup):
proc `=sink`*[T](x: var T; y: T) {.inline, nodestroy, magic: "Asgn".} =
## Generic `sink`:idx: implementation that can be overridden.
when defined(gcArc) or defined(gcOrc) or defined(gcAtomicArc):
when defined(gcArc) or defined(gcOrc) or defined(gcYrc) or defined(gcAtomicArc):
x = y
else:
shallowCopy(x, y)
@@ -2561,7 +2561,7 @@ when compileOption("rangechecks"):
else:
template rangeCheck*(cond) = discard
when not defined(gcArc) and not defined(gcOrc) and not defined(gcAtomicArc):
when not defined(gcArc) and not defined(gcOrc) and not defined(gcYrc) and not defined(gcAtomicArc):
proc shallow*[T](s: var seq[T]) {.noSideEffect, inline.} =
## Marks a sequence `s` as `shallow`:idx:. Subsequent assignments will not
## perform deep copies of `s`.
@@ -2630,7 +2630,7 @@ when hasAlloc or defined(nimscript):
setLen(x, xl+item.len)
var j = xl-1
while j >= i:
when defined(gcArc) or defined(gcOrc) or defined(gcAtomicArc):
when defined(gcArc) or defined(gcOrc) or defined(gcYrc) or defined(gcAtomicArc):
x[j+item.len] = move x[j]
else:
shallowCopy(x[j+item.len], x[j])