调用 FSDeleteObject 时的竞争条件
我已经实现了一个“安全保存”操作，如下所示：
- 将一些数据保存到临时文件
A - 将
A的内容复制到最终目标B - 删除
A
我在第 3 步遇到了竞争条件，当尝试使用 删除文件时，Mac OS X 偶尔会返回错误 -47 (。我完全有信心我是唯一修改此文件的人，并怀疑操作系统在我尝试删除该文件时正在执行某些操作（例如后台缓存任务），从而导致错误。fBsyErr) FSDeleteObject
这是一个间歇性问题：通常 FSDeleteObject 调用工作得很好。在我收到错误代码的情况下，当操作系统完成使用该文件时，我希望“在稍后的时间点”安全地删除该文件。
尝试删除这个麻烦的临时文件时最好采取什么措施？
I have implemented a "safe save" operation that goes something like this:
- Save some data to temporary file
A - Copy contents of
Ato final destinationB - Delete
A
I have a race condition at step 3 where Mac OS X will occasionally come back with error -47 (fBsyErr) when trying to delete the file using FSDeleteObject. I am completely confident I am the only one modifying this file and suspect the OS is doing something (e.g., background caching tasks) at the time I try to delete the file, resulting in the error.
This is an intermittent issue: normally the FSDeleteObject call works just fine. In those cases where I get the error code back I'd like to safely delete the file "at a later point in time" when the OS is finished playing with it.
What would be the best course of action to take in trying to delete this troublesome temporary file?
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每个问题都有一系列的解决方法，对两者来说最好的方法是使用
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Each problem has a series of workarounds, the best for both is to use
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