Antoine Pitrou <pit...@free.fr> added the comment:
I see that Sun/Oracle Java trusts MoveFileEx to do atomic renames:
290 // atomic case
291 if (atomicMove) {
292 try {
293 MoveFileEx(sourcePath, targetPath,
MOVEFILE_REPLACE_EXISTING);
294 } catch (WindowsException x) {
295 if (x.lastError() == ERROR_NOT_SAME_DEVICE) {
296 throw new AtomicMoveNotSupportedException(
297 source.getPathForExceptionMessage(),
298 target.getPathForExceptionMessage(),
299 x.errorString());
300 }
301 x.rethrowAsIOException(source, target);
302 }
303 return;
304 }
(from http://www.docjar.com/html/api/sun/nio/fs/WindowsFileCopy.java.html )
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<http://bugs.python.org/issue8828>
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