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Greg Bedwell 7f68a71669 Fix rename() sometimes failing if another process uses openFileForRead()

On Windows, fs::rename() could fail is another process was reading the
file at the same time using fs::openFileForRead().  In most cases the user
wouldn't notice as fs::rename() will continue to retry for 2000ms.  Typically
this is enough for the read to complete and a retry to succeed, but if the
disk is being it too hard then the response time might be longer than the
retry time and the rename would fail with a permission error.

Add FILE_SHARE_DELETE to the sharing flags for CreateFileW() in
fs::openFileForRead() and try ReplaceFileW() prior to MoveFileExW()
in fs::rename().

Based on an initial patch by Edd Dawson!

Differential Revision: http://reviews.llvm.org/D13647

llvm-svn: 250046

2015-10-12 15:11:47 +00:00

clang

[Driver] Remove else after return

2015-10-12 14:32:57 +00:00

clang-tools-extra

Added documentation for misc-throw-by-value-catch-by-reference.

2015-10-12 12:57:55 +00:00

compiler-rt

Revert "builtins: enable builtins build for MSVC"

2015-10-11 22:30:10 +00:00

debuginfo-tests

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