diff options
Diffstat (limited to 'absl/synchronization/internal/futex.h')
| -rw-r--r-- | absl/synchronization/internal/futex.h | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/absl/synchronization/internal/futex.h b/absl/synchronization/internal/futex.h index 3539f491..06fbd6d0 100644 --- a/absl/synchronization/internal/futex.h +++ b/absl/synchronization/internal/futex.h @@ -38,6 +38,19 @@ #include "absl/base/optimization.h" #include "absl/synchronization/internal/kernel_timeout.h" +#ifdef ABSL_INTERNAL_HAVE_FUTEX +#error ABSL_INTERNAL_HAVE_FUTEX may not be set on the command line +#elif defined(__BIONIC__) +// Bionic supports all the futex operations we need even when some of the futex +// definitions are missing. +#define ABSL_INTERNAL_HAVE_FUTEX +#elif defined(__linux__) && defined(FUTEX_CLOCK_REALTIME) +// FUTEX_CLOCK_REALTIME requires Linux >= 2.6.28. +#define ABSL_INTERNAL_HAVE_FUTEX +#endif + +#ifdef ABSL_INTERNAL_HAVE_FUTEX + namespace absl { ABSL_NAMESPACE_BEGIN namespace synchronization_internal { @@ -136,4 +149,6 @@ class Futex : public FutexImpl {}; ABSL_NAMESPACE_END } // namespace absl +#endif // ABSL_INTERNAL_HAVE_FUTEX + #endif // ABSL_SYNCHRONIZATION_INTERNAL_FUTEX_H_ |