diff options
Diffstat (limited to 'libcxx/src/thread.cpp')
| -rw-r--r-- | libcxx/src/thread.cpp | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/libcxx/src/thread.cpp b/libcxx/src/thread.cpp index 184d81e6b2f..447eca7b019 100644 --- a/libcxx/src/thread.cpp +++ b/libcxx/src/thread.cpp @@ -69,7 +69,9 @@ thread::hardware_concurrency() _NOEXCEPT 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) |
