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修复Unsafe CAS的代码仍存在的问题 #2855

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Merged
Snailclimb merged 1 commit into from
May 21, 2026
+6 −4
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修复Unsafe CAS的代码仍存在的问题 #2855

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10 changes: 6 additions & 4 deletions docs/java/basis/unsafe.md
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Original file line number Diff line number Diff line change
Expand Up @@ -568,10 +568,12 @@ private void incrementAndPrint(int targetValue) {
return;
}
// 尝试 CAS 操作：如果当前值等于 targetValue - 1，则原子地设置为 targetValue
if (unsafe.compareAndSwapInt(this, fieldOffset, currentValue, targetValue)) {
// CAS 成功后立即打印，确保打印的就是本次设置的值
System.out.print(targetValue + " ");
return;
if (currentValue == targetValue - 1) {
if (unsafe.compareAndSwapInt(this, fieldOffset, currentValue, targetValue)) {
// CAS 成功后立即打印，确保打印的就是本次设置的值
System.out.print(targetValue + " ");
return;
}
}
// CAS 失败，重新读取并重试
}
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