1 files changed, 0 insertions, 139 deletions
diff --git a/lib/libcxx/include/__refstring b/lib/libcxx/include/__refstring
deleted file mode 100644
index 61ccc75122a..00000000000
--- a/lib/libcxx/include/__refstring
+++ /dev/null
@@ -1,139 +0,0 @@
-//===------------------------ __refstring ---------------------------------===//
-//
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-
-#ifndef _LIBCPP___REFSTRING
-#define _LIBCPP___REFSTRING
-
-#include <__config>
-#include <cstddef>
-#include <cstring>
-#ifdef __APPLE__
-#include <dlfcn.h>
-#include <mach-o/dyld.h>
-#endif
-
-_LIBCPP_BEGIN_NAMESPACE_STD
-
-class _LIBCPP_HIDDEN __libcpp_refstring
-{
-private:
-    const char* str_;
-
-    typedef int count_t;
-
-    struct _Rep_base
-    {
-        std::size_t len;
-        std::size_t cap;
-        count_t     count;
-    };
-
-    static
-    _Rep_base*
-    rep_from_data(const char *data_) _NOEXCEPT
-    {
-        char *data = const_cast<char *>(data_);
-        return reinterpret_cast<_Rep_base *>(data - sizeof(_Rep_base));
-    }
-    static
-    char *
-    data_from_rep(_Rep_base *rep) _NOEXCEPT
-    {
-        char *data = reinterpret_cast<char *>(rep);
-        return data + sizeof(*rep);
-    }
-
-#ifdef __APPLE__
-    static
-    const char*
-    compute_gcc_empty_string_storage() _NOEXCEPT
-    {
-        void* handle = dlopen("/usr/lib/libstdc++.6.dylib", RTLD_NOLOAD);
-        if (handle == nullptr)
-            return nullptr;
-        void* sym = dlsym(handle, "_ZNSs4_Rep20_S_empty_rep_storageE");
-        if (sym == nullptr)
-            return nullptr;
-        return data_from_rep(reinterpret_cast<_Rep_base *>(sym));
-    }
-
-    static
-    const char*
-    get_gcc_empty_string_storage() _NOEXCEPT
-    {
-        static const char* p = compute_gcc_empty_string_storage();
-        return p;
-    }
-
-    bool
-    uses_refcount() const
-    {
-        return str_ != get_gcc_empty_string_storage();
-    }
-#else
-    bool
-    uses_refcount() const
-    {
-        return true;
-    }
-#endif
-
-public:
-    explicit __libcpp_refstring(const char* msg) {
-        std::size_t len = strlen(msg);
-        _Rep_base* rep = static_cast<_Rep_base *>(::operator new(sizeof(*rep) + len + 1));
-        rep->len = len;
-        rep->cap = len;
-        rep->count = 0;
-        char *data = data_from_rep(rep);
-        std::memcpy(data, msg, len + 1);
-        str_ = data;
-    }
-
-    __libcpp_refstring(const __libcpp_refstring& s) _NOEXCEPT : str_(s.str_)
-    {
-        if (uses_refcount())
-            __sync_add_and_fetch(&rep_from_data(str_)->count, 1);
-    }
-
-    __libcpp_refstring& operator=(const __libcpp_refstring& s) _NOEXCEPT
-    {
-        bool adjust_old_count = uses_refcount();
-        struct _Rep_base *old_rep = rep_from_data(str_);
-        str_ = s.str_;
-        if (uses_refcount())
-            __sync_add_and_fetch(&rep_from_data(str_)->count, 1);
-        if (adjust_old_count)
-        {
-            if (__sync_add_and_fetch(&old_rep->count, count_t(-1)) < 0)
-            {
-                ::operator delete(old_rep);
-            }
-        }
-        return *this;
-    }
-
-    ~__libcpp_refstring()
-    {
-        if (uses_refcount())
-        {
-            _Rep_base* rep = rep_from_data(str_);
-            if (__sync_add_and_fetch(&rep->count, count_t(-1)) < 0)
-            {
-                ::operator delete(rep);
-            }
-        }
-    }
-
-    const char* c_str() const _NOEXCEPT {return str_;}
-};
-
-_LIBCPP_END_NAMESPACE_STD
-
-#endif //_LIBCPP___REFSTRING