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authorBoris Kolpackov <boris@codesynthesis.com>2017-01-24 08:10:58 +0200
committerBoris Kolpackov <boris@codesynthesis.com>2017-01-24 08:10:58 +0200
commit2fcb8f32f339f3a3cb550f10f565d6072f565012 (patch)
tree1124a256ba5fe1f66272b781a99374c4c688e3d7 /butl/ft
parentf29c9a5a0cdca0205f98d55ad20d1145295db126 (diff)
Redo config as feature test macros
Diffstat (limited to 'butl/ft')
-rw-r--r--butl/ft/exception39
-rw-r--r--butl/ft/lang29
-rw-r--r--butl/ft/shared_mutex42
3 files changed, 110 insertions, 0 deletions
diff --git a/butl/ft/exception b/butl/ft/exception
new file mode 100644
index 0000000..2dd3a38
--- /dev/null
+++ b/butl/ft/exception
@@ -0,0 +1,39 @@
+// file : butl/ft/exception -*- C++ -*-
+// copyright : Copyright (c) 2014-2017 Code Synthesis Ltd
+// license : MIT; see accompanying LICENSE file
+
+#ifndef BUTL_FT_EXCEPTION
+#define BUTL_FT_EXCEPTION
+
+#include <cstddef> // _LIBCPP_VERSION
+#include <exception>
+
+// __cpp_lib_uncaught_exceptions
+//
+#ifndef __cpp_lib_uncaught_exceptions
+ //
+ // VC has it since 1900.
+ //
+# if defined(_MSC_VER)
+# if _MSC_VER >= 1900
+# define __cpp_lib_uncaught_exceptions 201411
+# endif
+ //
+ // Clang's libc++ seems to have it for a while (but not before 1200) so we
+ // assume it's there from 1200. But not for MacOS, where it is explicitly
+ // marked as unavailable until MacOS 10.12.
+ //
+# elif defined(_LIBCPP_VERSION)
+# if _LIBCPP_VERSION >= 1200 && \
+ (!defined(__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__) || \
+ __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ >= 101200)
+# define __cpp_lib_uncaught_exceptions 201411
+# 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
+
+#endif // BUTL_FT_EXCEPTION
diff --git a/butl/ft/lang b/butl/ft/lang
new file mode 100644
index 0000000..8cfc441
--- /dev/null
+++ b/butl/ft/lang
@@ -0,0 +1,29 @@
+// file : butl/ft/lang -*- C++ -*-
+// copyright : Copyright (c) 2014-2017 Code Synthesis Ltd
+// license : MIT; see accompanying LICENSE file
+
+#ifndef BUTL_FT_LANG
+#define BUTL_FT_LANG
+
+// __cpp_thread_local (extension)
+//
+// If this macro is undefined then one may choose to fallback to __thread.
+// Note, however, that it only for values that do not require dynamic
+// (runtime) initialization.
+//
+#ifndef __cpp_thread_local
+ //
+ // Apparently Apple's Clang "temporarily disabled" C++11 thread_local until
+ // they can implement a "fast" version, which reportedly happened in XCode
+ // 8.
+ //
+# if defined(__apple_build_version__)
+# if __apple_build_version__ >= 8000000
+# define __cpp_thread_local 201103
+# endif
+# else
+# define __cpp_thread_local 201103
+# endif
+#endif
+
+#endif // BUTL_FT_LANG
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