Commit 135a17e5 authored by Bill Wendling's avatar Bill Wendling
Browse files

--- Merging r127723 into '.': 

U    lib/Support/Windows/Path.inc

llvm-svn: 128202
parent 89d31400

llvm/lib/Support/Windows/Path.inc

+11 −1
Original line number Diff line number Diff line
@@ -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)