From 61377c582e0f2675baa5f5e6e30a35d1a4164b33 Mon Sep 17 00:00:00 2001
From: Karen Arutyunov <karen@codesynthesis.com>
Date: Mon, 1 May 2017 16:08:43 +0300
Subject: Add hxx extension for headers and lib prefix for library dir

---
 libbutl/ft/shared_mutex.hxx | 58 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 58 insertions(+)
 create mode 100644 libbutl/ft/shared_mutex.hxx

(limited to 'libbutl/ft/shared_mutex.hxx')

diff --git a/libbutl/ft/shared_mutex.hxx b/libbutl/ft/shared_mutex.hxx
new file mode 100644
index 0000000..6c6d415
--- /dev/null
+++ b/libbutl/ft/shared_mutex.hxx
@@ -0,0 +1,58 @@
+// file      : libbutl/ft/shared_mutex.hxx -*- C++ -*-
+// copyright : Copyright (c) 2014-2017 Code Synthesis Ltd
+// license   : MIT; see accompanying LICENSE file
+
+#ifndef LIBBUTL_FT_SHARED_MUTEX_HXX
+#define LIBBUTL_FT_SHARED_MUTEX_HXX
+
+#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. It's also only enabled after C++14. But not
+   // for MacOS, where it is explicitly marked as unavailable until MacOS
+   // 10.12.
+   //
+#  elif defined(_LIBCPP_VERSION) && defined(_LIBCPP_STD_VER)
+#    if _LIBCPP_VERSION >= 1200 &&                              \
+  _LIBCPP_STD_VER > 14 &&                                       \
+  (!defined(__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__) ||   \
+   __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ >= 101200)
+#      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_timed_mutex
+//
+#ifndef __cpp_lib_shared_timed_mutex
+   //
+   // On MacOS shared_timed_mutex is marked as unavailable until MacOS
+   // 10.12.
+   //
+#  if defined(_LIBCPP_VERSION)
+#    if !defined(__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__) ||      \
+  __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ >= 101200
+#      define __cpp_lib_shared_timed_mutex 201402
+#    endif
+#  else
+#    define __cpp_lib_shared_timed_mutex 201402
+#  endif
+#endif
+
+#endif // LIBBUTL_FT_SHARED_MUTEX_HXX
-- 
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