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Windows/PathV2.inc: Retry rename() for (maximum) 2 seconds.

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Files might be opend by system scanners (eg. file indexer, virus scanner, &c).

llvm-svn: 156380
This commit is contained in:
NAKAMURA Takumi 2012-05-08 14:31:46 +00:00
parent c9f011a85b
commit 334c0709db
1 changed files with 14 additions and 4 deletions
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18
lib/Support/Windows/PathV2.inc
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@ -301,11 +301,21 @@ error_code rename(const Twine &from, const Twine &to) {
if (error_code ec = UTF8ToUTF16(f, wide_from)) return ec;
if (error_code ec = UTF8ToUTF16(t, wide_to)) return ec;
if (!::MoveFileExW(wide_from.begin(), wide_to.begin(),
MOVEFILE_COPY_ALLOWED | MOVEFILE_REPLACE_EXISTING))
return windows_error(::GetLastError());
error_code ec = error_code::success();
for (int i = 0; i < 2000; i++) {
if (::MoveFileExW(wide_from.begin(), wide_to.begin(),
MOVEFILE_COPY_ALLOWED | MOVEFILE_REPLACE_EXISTING))
return error_code::success();
ec = windows_error(::GetLastError());
if (ec != windows_error::access_denied)
break;
// Retry MoveFile() at ACCESS_DENIED.
// System scanners (eg. indexer) might open the source file when
// It is written and closed.
::Sleep(1);
}
return error_code::success();
return ec;
}
error_code resize_file(const Twine &path, uint64_t size) {