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document atomicInc and atomicDec (#22789)

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ringabout
2023-10-04 22:00:41 +08:00
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parent 1a6ca0c604
commit f4a623dadf
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lib/std/sysatomics.nim
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@@ -265,6 +265,7 @@ else:
proc atomicInc*(memLoc: var int, x: int = 1): int {.inline, discardable, raises: [], tags: [].} =
## Atomically increments the integer by some `x`. It returns the new value.
when someGcc and hasThreadSupport:
result = atomicAddFetch(memLoc.addr, x, ATOMIC_SEQ_CST)
elif someVcc and hasThreadSupport:
@@ -275,6 +276,7 @@ proc atomicInc*(memLoc: var int, x: int = 1): int {.inline, discardable, raises:
result = memLoc
proc atomicDec*(memLoc: var int, x: int = 1): int {.inline, discardable, raises: [], tags: [].} =
## Atomically decrements the integer by some `x`. It returns the new value.
when someGcc and hasThreadSupport:
when declared(atomicSubFetch):
result = atomicSubFetch(memLoc.addr, x, ATOMIC_SEQ_CST)