1 //===------------------------ iostream.cpp --------------------------------===//
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
7 //===----------------------------------------------------------------------===//
9 #include "__std_stream"
15 #define str(s) _str(s)
16 #define _LIBCPP_ABI_NAMESPACE_STR str(_LIBCPP_ABI_NAMESPACE)
18 _LIBCPP_BEGIN_NAMESPACE_STD
20 #ifndef _LIBCPP_HAS_NO_STDIN
21 _ALIGNAS_TYPE (istream) _LIBCPP_FUNC_VIS char cin[sizeof(istream)]
22 #if defined(_LIBCPP_ABI_MICROSOFT) && defined(__clang__)
23 __asm__("?cin@" _LIBCPP_ABI_NAMESPACE_STR "@std@@3V?$basic_istream@DU?$char_traits@D@" _LIBCPP_ABI_NAMESPACE_STR "@std@@@12@A")
26 _ALIGNAS_TYPE (__stdinbuf<char> ) static char __cin[sizeof(__stdinbuf <char>)];
27 static mbstate_t mb_cin;
28 _ALIGNAS_TYPE (wistream) _LIBCPP_FUNC_VIS char wcin[sizeof(wistream)]
29 #if defined(_LIBCPP_ABI_MICROSOFT) && defined(__clang__)
30 __asm__("?wcin@" _LIBCPP_ABI_NAMESPACE_STR "@std@@3V?$basic_istream@_WU?$char_traits@_W@" _LIBCPP_ABI_NAMESPACE_STR "@std@@@12@A")
33 _ALIGNAS_TYPE (__stdinbuf<wchar_t> ) static char __wcin[sizeof(__stdinbuf <wchar_t>)];
34 static mbstate_t mb_wcin;
37 #ifndef _LIBCPP_HAS_NO_STDOUT
38 _ALIGNAS_TYPE (ostream) _LIBCPP_FUNC_VIS char cout[sizeof(ostream)]
39 #if defined(_LIBCPP_ABI_MICROSOFT) && defined(__clang__)
40 __asm__("?cout@" _LIBCPP_ABI_NAMESPACE_STR "@std@@3V?$basic_ostream@DU?$char_traits@D@" _LIBCPP_ABI_NAMESPACE_STR "@std@@@12@A")
43 _ALIGNAS_TYPE (__stdoutbuf<char>) static char __cout[sizeof(__stdoutbuf<char>)];
44 static mbstate_t mb_cout;
45 _ALIGNAS_TYPE (wostream) _LIBCPP_FUNC_VIS char wcout[sizeof(wostream)]
46 #if defined(_LIBCPP_ABI_MICROSOFT) && defined(__clang__)
47 __asm__("?wcout@" _LIBCPP_ABI_NAMESPACE_STR "@std@@3V?$basic_ostream@_WU?$char_traits@_W@" _LIBCPP_ABI_NAMESPACE_STR "@std@@@12@A")
50 _ALIGNAS_TYPE (__stdoutbuf<wchar_t>) static char __wcout[sizeof(__stdoutbuf<wchar_t>)];
51 static mbstate_t mb_wcout;
54 _ALIGNAS_TYPE (ostream) _LIBCPP_FUNC_VIS char cerr[sizeof(ostream)]
55 #if defined(_LIBCPP_ABI_MICROSOFT) && defined(__clang__)
56 __asm__("?cerr@" _LIBCPP_ABI_NAMESPACE_STR "@std@@3V?$basic_ostream@DU?$char_traits@D@" _LIBCPP_ABI_NAMESPACE_STR "@std@@@12@A")
59 _ALIGNAS_TYPE (__stdoutbuf<char>) static char __cerr[sizeof(__stdoutbuf<char>)];
60 static mbstate_t mb_cerr;
61 _ALIGNAS_TYPE (wostream) _LIBCPP_FUNC_VIS char wcerr[sizeof(wostream)]
62 #if defined(_LIBCPP_ABI_MICROSOFT) && defined(__clang__)
63 __asm__("?wcerr@" _LIBCPP_ABI_NAMESPACE_STR "@std@@3V?$basic_ostream@_WU?$char_traits@_W@" _LIBCPP_ABI_NAMESPACE_STR "@std@@@12@A")
66 _ALIGNAS_TYPE (__stdoutbuf<wchar_t>) static char __wcerr[sizeof(__stdoutbuf<wchar_t>)];
67 static mbstate_t mb_wcerr;
69 _ALIGNAS_TYPE (ostream) _LIBCPP_FUNC_VIS char clog[sizeof(ostream)]
70 #if defined(_LIBCPP_ABI_MICROSOFT) && defined(__clang__)
71 __asm__("?clog@" _LIBCPP_ABI_NAMESPACE_STR "@std@@3V?$basic_ostream@DU?$char_traits@D@" _LIBCPP_ABI_NAMESPACE_STR "@std@@@12@A")
74 _ALIGNAS_TYPE (wostream) _LIBCPP_FUNC_VIS char wclog[sizeof(wostream)]
75 #if defined(_LIBCPP_ABI_MICROSOFT) && defined(__clang__)
76 __asm__("?wclog@" _LIBCPP_ABI_NAMESPACE_STR "@std@@3V?$basic_ostream@_WU?$char_traits@_W@" _LIBCPP_ABI_NAMESPACE_STR "@std@@@12@A")
80 _LIBCPP_HIDDEN ios_base::Init __start_std_streams;
82 // On Windows the TLS storage for locales needs to be initialized before we create
83 // the standard streams, otherwise it may not be alive during program termination
84 // when we flush the streams.
85 static void force_locale_initialization() {
86 #if defined(_LIBCPP_MSVCRT_LIKE)
87 static bool once = []() {
88 auto loc = newlocale(LC_ALL_MASK, "C", 0);
90 __libcpp_locale_guard g(loc); // forces initialization of locale TLS
106 DoIOSInit::DoIOSInit()
108 force_locale_initialization();
110 #ifndef _LIBCPP_HAS_NO_STDIN
111 istream* cin_ptr = ::new(cin) istream(::new(__cin) __stdinbuf <char>(stdin, &mb_cin));
112 wistream* wcin_ptr = ::new(wcin) wistream(::new(__wcin) __stdinbuf <wchar_t>(stdin, &mb_wcin));
114 #ifndef _LIBCPP_HAS_NO_STDOUT
115 ostream* cout_ptr = ::new(cout) ostream(::new(__cout) __stdoutbuf<char>(stdout, &mb_cout));
116 wostream* wcout_ptr = ::new(wcout) wostream(::new(__wcout) __stdoutbuf<wchar_t>(stdout, &mb_wcout));
118 ostream* cerr_ptr = ::new(cerr) ostream(::new(__cerr) __stdoutbuf<char>(stderr, &mb_cerr));
119 ::new(clog) ostream(cerr_ptr->rdbuf());
120 wostream* wcerr_ptr = ::new(wcerr) wostream(::new(__wcerr) __stdoutbuf<wchar_t>(stderr, &mb_wcerr));
121 ::new(wclog) wostream(wcerr_ptr->rdbuf());
123 #if !defined(_LIBCPP_HAS_NO_STDIN) && !defined(_LIBCPP_HAS_NO_STDOUT)
124 cin_ptr->tie(cout_ptr);
125 wcin_ptr->tie(wcout_ptr);
127 _VSTD::unitbuf(*cerr_ptr);
128 _VSTD::unitbuf(*wcerr_ptr);
129 #ifndef _LIBCPP_HAS_NO_STDOUT
130 cerr_ptr->tie(cout_ptr);
131 wcerr_ptr->tie(wcout_ptr);
135 DoIOSInit::~DoIOSInit()
137 #ifndef _LIBCPP_HAS_NO_STDOUT
138 ostream* cout_ptr = reinterpret_cast<ostream*>(cout);
139 wostream* wcout_ptr = reinterpret_cast<wostream*>(wcout);
144 ostream* clog_ptr = reinterpret_cast<ostream*>(clog);
145 wostream* wclog_ptr = reinterpret_cast<wostream*>(wclog);
150 ios_base::Init::Init()
152 static DoIOSInit init_the_streams; // gets initialized once
155 ios_base::Init::~Init()
159 _LIBCPP_END_NAMESPACE_STD