diff options
| author | NAKAMURA Takumi <geek4civic@gmail.com> | 2011-03-16 02:53:24 +0000 |
|---|---|---|
| committer | NAKAMURA Takumi <geek4civic@gmail.com> | 2011-03-16 02:53:24 +0000 |
| commit | bfb25cd97ce21f511f8bcbcff57c11aade502d5b (patch) | |
| tree | 68cbdae442845c217809581201aa3476e20182af | |
| parent | 124d0332dbf79ae44a61968c7c2d379552cc715d (diff) | |
Windows/Path.inc: [PR6270] PathV1::makeUnique(): Give arbitrary initial seed for workaround.
FIXME: We should use sys::fs::unique_file() in future.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@127723 91177308-0d34-0410-b5e6-96231b3b80d8
| -rw-r--r-- | lib/Support/Windows/Path.inc | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/lib/Support/Windows/Path.inc b/lib/Support/Windows/Path.inc index f4b7cec2a1..42a92f9c6d 100644 --- a/lib/Support/Windows/Path.inc +++ b/lib/Support/Windows/Path.inc @@ -882,7 +882,17 @@ Path::makeUnique(bool reuse_current, std::string* ErrMsg) { // Find a numeric suffix that isn't used by an existing file. Assume there // won't be more than 1 million files with the same prefix. Probably a safe // bet. - static unsigned FCounter = 0; + static int FCounter = -1; + if (FCounter < 0) { + // Give arbitrary initial seed. + // FIXME: We should use sys::fs::unique_file() in future. + LARGE_INTEGER cnt64; + DWORD x = GetCurrentProcessId(); + x = (x << 16) | (x >> 16); + if (QueryPerformanceCounter(&cnt64)) // RDTSC + x ^= cnt64.HighPart ^ cnt64.LowPart; + FCounter = x % 1000000; + } do { sprintf(FNBuffer+offset, "-%06u", FCounter); if (++FCounter > 999999) |