windows - 检查 ReadDirectoryChangesw 是否适用于给定路径

Question

有什么方法可以测试 ReadDirectoryChanges 是否适用于给定路径？ (例如，我假设它不适用于 Linux 网络共享)。我想在这样的路径上调用 ReadDirectoryChanges 会返回一个错误代码，但我目前无法测试它。任何人都知道这是否有效？还有其他测试方法吗？

Answer 1

来自 MSDN :

Return Value

If the function succeeds, the return value is nonzero. For synchronous calls, this means that the operation succeeded. For asynchronous calls, this indicates that the operation was successfully queued.

If the function fails, the return value is zero. To get extended error information, call GetLastError.

If the network redirector or the target file system does not support this operation, the function fails with ERROR_INVALID_FUNCTION.

因此只需检查“ERROR_INVALID_FUNCTION”。