1 // Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006
2 // Free Software Foundation, Inc.
4 // This file is part of the GNU ISO C++ Library. This library is free
5 // software; you can redistribute it and/or modify it under the
6 // terms of the GNU General Public License as published by the
7 // Free Software Foundation; either version 2, or (at your option)
10 // This library is distributed in the hope that it will be useful,
11 // but WITHOUT ANY WARRANTY; without even the implied warranty of
12 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 // GNU General Public License for more details.
15 // You should have received a copy of the GNU General Public License along
16 // with this library; see the file COPYING. If not, write to the Free
17 // Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
20 // As a special exception, you may use this file as part of a free software
21 // library without restriction. Specifically, if other files instantiate
22 // templates or use macros or inline functions from this file, or you compile
23 // this file and link it with other files to produce an executable, this
24 // file does not by itself cause the resulting executable to be covered by
25 // the GNU General Public License. This exception does not however
26 // invalidate any other reasons why the executable file might be covered by
27 // the GNU General Public License.
29 #include "bits/c++config.h"
30 #include "bits/gthr.h"
34 #include <ext/stdio_filebuf.h>
35 #include <ext/stdio_sync_filebuf.h>
37 // On AIX, and perhaps other systems, library initialization order is
38 // not guaranteed. For example, the static initializers for the main
39 // program might run before the static initializers for this library.
40 // That means that we cannot rely on static initialization in the
41 // library; there is no guarantee that things will get initialized in
42 // time. This file contains definitions of all global variables that
43 // require initialization as arrays of characters.
45 // NB: asm directives can rename these non-exported, namespace
46 // __gnu_cxx symbols into exported, namespace std symbols with the
47 // appropriate symbol version name.
48 // The rename syntax is
49 // asm (".symver currentname,oldname@@GLIBCXX_3.2")
51 // _GLIBCXX_ASM_SYMVER(currentname, oldname, GLIBCXX_3.2)
53 _GLIBCXX_BEGIN_NAMESPACE(std)
55 // Standard stream objects.
56 // NB: Iff <iostream> is included, these definitions become wonky.
57 typedef char fake_istream[sizeof(istream)]
58 __attribute__ ((aligned(__alignof__(istream))));
59 typedef char fake_ostream[sizeof(ostream)]
60 __attribute__ ((aligned(__alignof__(ostream))));
66 #ifdef _GLIBCXX_USE_WCHAR_T
67 typedef char fake_wistream[sizeof(wistream)]
68 __attribute__ ((aligned(__alignof__(wistream))));
69 typedef char fake_wostream[sizeof(wostream)]
70 __attribute__ ((aligned(__alignof__(wostream))));
77 _GLIBCXX_END_NAMESPACE
79 namespace __gnu_internal _GLIBCXX_VISIBILITY(hidden)
82 using namespace __gnu_cxx;
84 // We use different stream buffer types depending on whether
85 // ios_base::sync_with_stdio(false) has been called.
86 typedef char fake_stdiobuf[sizeof(stdio_sync_filebuf<char>)]
87 __attribute__ ((aligned(__alignof__(stdio_sync_filebuf<char>))));
88 fake_stdiobuf buf_cout_sync;
89 fake_stdiobuf buf_cin_sync;
90 fake_stdiobuf buf_cerr_sync;
92 typedef char fake_filebuf[sizeof(stdio_filebuf<char>)]
93 __attribute__ ((aligned(__alignof__(stdio_filebuf<char>))));
94 fake_filebuf buf_cout;
96 fake_filebuf buf_cerr;
98 #ifdef _GLIBCXX_USE_WCHAR_T
99 typedef char fake_wstdiobuf[sizeof(stdio_sync_filebuf<wchar_t>)]
100 __attribute__ ((aligned(__alignof__(stdio_sync_filebuf<wchar_t>))));
101 fake_wstdiobuf buf_wcout_sync;
102 fake_wstdiobuf buf_wcin_sync;
103 fake_wstdiobuf buf_wcerr_sync;
105 typedef char fake_wfilebuf[sizeof(stdio_filebuf<wchar_t>)]
106 __attribute__ ((aligned(__alignof__(stdio_filebuf<wchar_t>))));
107 fake_wfilebuf buf_wcout;
108 fake_wfilebuf buf_wcin;
109 fake_wfilebuf buf_wcerr;
112 // Globals for once-only runtime initialization of mutex objects. This
113 // allows static initialization of these objects on systems that need a
114 // function call to initialize a mutex. For example, see stl_threads.h.
115 #ifdef __GTHREAD_MUTEX_INIT
116 #elif defined(__GTHREAD_MUTEX_INIT_FUNCTION)
117 __gthread_once_t _GLIBCXX_once = __GTHREAD_ONCE_INIT;
118 __gthread_mutex_t _GLIBCXX_mutex;
119 __gthread_mutex_t *_GLIBCXX_mutex_address;
121 // Once-only initializer function for _GLIBCXX_mutex.
123 _GLIBCXX_mutex_init ()
124 { __GTHREAD_MUTEX_INIT_FUNCTION (&_GLIBCXX_mutex); }
126 // Once-only initializer function for _GLIBCXX_mutex_address.
128 _GLIBCXX_mutex_address_init ()
129 { __GTHREAD_MUTEX_INIT_FUNCTION (_GLIBCXX_mutex_address); }
131 } // namespace __gnu_internal