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Diffstat (limited to 'butl/ft/shared_mutex')
| -rw-r--r-- | butl/ft/shared_mutex | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/butl/ft/shared_mutex b/butl/ft/shared_mutex new file mode 100644 index 0000000..b4bab94 --- /dev/null +++ b/butl/ft/shared_mutex @@ -0,0 +1,42 @@ +// file : butl/ft/shared_mutex -*- C++ -*- +// copyright : Copyright (c) 2014-2017 Code Synthesis Ltd +// license : MIT; see accompanying LICENSE file + +#ifndef BUTL_FT_SHARED_MUTEX +#define BUTL_FT_SHARED_MUTEX + +#include <cstddef> // _LIBCPP_VERSION +#include <shared_mutex> + +// __cpp_lib_shared_mutex +// +#ifndef __cpp_lib_shared_mutex + // + // VC has it since 1900. + // +# if defined(_MSC_VER) +# if _MSC_VER >= 1900 +# define __cpp_lib_shared_mutex 201505 +# endif + // + // Clang's libc++ seems to have it for a while (but not before 1200) so we + // assume it's there from 1200. + // +# elif defined(_LIBCPP_VERSION) +# if _LIBCPP_VERSION >= 1200 +# define __cpp_lib_shared_mutex 201505 +# endif + // + // GCC libstdc++ has it since GCC 6 and it defines the feature test macro. + // We will also use this for any other runtime. + // +# endif +#endif + +// __cpp_lib_shared_mutex +// +#ifndef __cpp_lib_shared_timed_mutex +# define __cpp_lib_shared_timed_mutex 201402 +#endif + +#endif // BUTL_FT_SHARED_MUTEX |