diff options
Diffstat (limited to 'absl/flags/flag.cc')
| -rw-r--r-- | absl/flags/flag.cc | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/absl/flags/flag.cc b/absl/flags/flag.cc index f16cc75e3843..a02d069e9b00 100644 --- a/absl/flags/flag.cc +++ b/absl/flags/flag.cc @@ -41,4 +41,20 @@ ABSL_FLAGS_INTERNAL_FOR_EACH_LOCK_FREE(ABSL_FLAGS_ATOMIC_GET) #undef ABSL_FLAGS_ATOMIC_GET +// This global nutex protects on-demand construction of flag objects in MSVC +// builds. +#if defined(_MSC_VER) + +namespace flags_internal { + +ABSL_CONST_INIT static absl::Mutex construction_guard(absl::kConstInit); + +void LockGlobalConstructionGuard() { construction_guard.Lock(); } + +void UnlockGlobalConstructionGuard() { construction_guard.Unlock(); } + +} // namespace flags_internal + +#endif + } // namespace absl |