diff options
| author | Bill Wendling <isanbard@gmail.com> | 2011-03-24 06:17:12 +0000 |
|---|---|---|
| committer | Bill Wendling <isanbard@gmail.com> | 2011-03-24 06:17:12 +0000 |
| commit | 135a17e564bdb0ec98e9fda3da720f22d870b649 (patch) | |
| tree | 9fa8bea66184099197846efc8fd64614d6989b47 | |
| parent | 89d31400e264a352824a547bd453ad38f1e7d1b8 (diff) | |
| download | llvm-135a17e564bdb0ec98e9fda3da720f22d870b649.zip llvm-135a17e564bdb0ec98e9fda3da720f22d870b649.tar.gz llvm-135a17e564bdb0ec98e9fda3da720f22d870b649.tar.bz2 | |
--- Merging r127723 into '.':
U lib/Support/Windows/Path.inc
llvm-svn: 128202
| -rw-r--r-- | llvm/lib/Support/Windows/Path.inc | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/llvm/lib/Support/Windows/Path.inc b/llvm/lib/Support/Windows/Path.inc index 625f67a..d6b5823 100644 --- a/llvm/lib/Support/Windows/Path.inc +++ b/llvm/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) |