Belt and suspenders when calling sysconf
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@174642 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/src/thread.cpp b/src/thread.cpp
index 184d81e..447eca7 100644
--- a/src/thread.cpp
+++ b/src/thread.cpp
@@ -69,7 +69,9 @@
long result = sysconf(_SC_NPROCESSORS_ONLN);
// sysconf returns -1 if the name is invalid, the option does not exist or
// does not have a definite limit.
- if (result == -1)
+ // if sysconf returns some other negative number, we have no idea
+ // what is going on. Default to something safe.
+ if (result < 0)
return 0;
return static_cast<unsigned>(result);
#else // defined(CTL_HW) && defined(HW_NCPU)