#include <fstream>
#include <bits/atomicity.h>
#include <ext/stdio_filebuf.h>
+#include <ext/stdio_sync_filebuf.h>
namespace __gnu_cxx
{
// Extern declarations for global objects in src/globals.cc.
+ extern stdio_sync_filebuf<char> buf_cout_sync;
+ extern stdio_sync_filebuf<char> buf_cin_sync;
+ extern stdio_sync_filebuf<char> buf_cerr_sync;
+
extern stdio_filebuf<char> buf_cout;
extern stdio_filebuf<char> buf_cin;
extern stdio_filebuf<char> buf_cerr;
-#ifdef _GLIBCPP_USE_WCHAR_T
+#ifdef _GLIBCXX_USE_WCHAR_T
+ extern stdio_sync_filebuf<wchar_t> buf_wcout_sync;
+ extern stdio_sync_filebuf<wchar_t> buf_wcin_sync;
+ extern stdio_sync_filebuf<wchar_t> buf_wcerr_sync;
+
extern stdio_filebuf<wchar_t> buf_wcout;
extern stdio_filebuf<wchar_t> buf_wcin;
extern stdio_filebuf<wchar_t> buf_wcerr;
extern ostream cerr;
extern ostream clog;
-#ifdef _GLIBCPP_USE_WCHAR_T
+#ifdef _GLIBCXX_USE_WCHAR_T
extern wistream wcin;
extern wostream wcout;
extern wostream wcerr;
ios_base::failure::failure(const string& __str) throw()
{
- strncpy(_M_name, __str.c_str(), _M_bufsize);
- _M_name[_M_bufsize - 1] = '\0';
+ strncpy(_M_name, __str.c_str(), _S_bufsize);
+ _M_name[_S_bufsize - 1] = '\0';
}
ios_base::failure::~failure() throw()
ios_base::failure::what() const throw()
{ return _M_name; }
- void
- ios_base::Init::_S_ios_create(bool __sync)
- {
- size_t __out_size = __sync ? 0 : static_cast<size_t>(BUFSIZ);
- size_t __in_size = __sync ? 1 : static_cast<size_t>(BUFSIZ);
-
- // NB: The file globals.cc creates the four standard files
- // with NULL buffers. At this point, we swap out the dummy NULL
- // [io]stream objects and buffers with the real deal.
- new (&buf_cout) stdio_filebuf<char>(stdout, ios_base::out, __out_size);
- new (&buf_cin) stdio_filebuf<char>(stdin, ios_base::in, __in_size);
- new (&buf_cerr) stdio_filebuf<char>(stderr, ios_base::out, __out_size);
- new (&cout) ostream(&buf_cout);
- new (&cin) istream(&buf_cin);
- new (&cerr) ostream(&buf_cerr);
- new (&clog) ostream(&buf_cerr);
- cin.tie(&cout);
- cerr.flags(ios_base::unitbuf);
-
-#ifdef _GLIBCPP_USE_WCHAR_T
- new (&buf_wcout) stdio_filebuf<wchar_t>(stdout, ios_base::out, __out_size);
- new (&buf_wcin) stdio_filebuf<wchar_t>(stdin, ios_base::in, __in_size);
- new (&buf_wcerr) stdio_filebuf<wchar_t>(stderr, ios_base::out, __out_size);
- new (&wcout) wostream(&buf_wcout);
- new (&wcin) wistream(&buf_wcin);
- new (&wcerr) wostream(&buf_wcerr);
- new (&wclog) wostream(&buf_wcerr);
- wcin.tie(&wcout);
- wcerr.flags(ios_base::unitbuf);
-#endif
- }
-
- void
- ios_base::Init::_S_ios_destroy()
- {
- // Explicitly call dtors to free any memory that is dynamically
- // allocated by filebuf ctor or member functions, but don't
- // deallocate all memory by calling operator delete.
- buf_cout.~stdio_filebuf();
- buf_cin.~stdio_filebuf();
- buf_cerr.~stdio_filebuf();
-
-#ifdef _GLIBCPP_USE_WCHAR_T
- buf_wcout.~stdio_filebuf();
- buf_wcin.~stdio_filebuf();
- buf_wcerr.~stdio_filebuf();
-#endif
- }
-
ios_base::Init::Init()
{
if (_S_ios_base_init == 0)
{
// Standard streams default to synced with "C" operations.
ios_base::Init::_S_synced_with_stdio = true;
- _S_ios_create(ios_base::Init::_S_synced_with_stdio);
+
+ new (&buf_cout_sync) stdio_sync_filebuf<char>(stdout);
+ new (&buf_cin_sync) stdio_sync_filebuf<char>(stdin);
+ new (&buf_cerr_sync) stdio_sync_filebuf<char>(stderr);
+
+ // The standard streams are constructed once only and never
+ // destroyed.
+ new (&cout) ostream(&buf_cout_sync);
+ new (&cin) istream(&buf_cin_sync);
+ new (&cerr) ostream(&buf_cerr_sync);
+ new (&clog) ostream(&buf_cerr_sync);
+ cin.tie(&cout);
+ cerr.flags(ios_base::unitbuf);
+
+#ifdef _GLIBCXX_USE_WCHAR_T
+ new (&buf_wcout_sync) stdio_sync_filebuf<wchar_t>(stdout);
+ new (&buf_wcin_sync) stdio_sync_filebuf<wchar_t>(stdin);
+ new (&buf_wcerr_sync) stdio_sync_filebuf<wchar_t>(stderr);
+
+ new (&wcout) wostream(&buf_wcout_sync);
+ new (&wcin) wistream(&buf_wcin_sync);
+ new (&wcerr) wostream(&buf_wcerr_sync);
+ new (&wclog) wostream(&buf_wcerr_sync);
+ wcin.tie(&wcout);
+ wcerr.flags(ios_base::unitbuf);
+#endif
+
+ _S_ios_base_init = 1;
}
++_S_ios_base_init;
}
ios_base::Init::~Init()
{
- if (--_S_ios_base_init == 0)
- _S_ios_destroy();
+ if (--_S_ios_base_init == 1)
+ {
+ // Catch any exceptions thrown by basic_ostream::flush()
+ try
+ {
+ // Flush standard output streams as required by 27.4.2.1.6
+ cout.flush();
+ cerr.flush();
+ clog.flush();
+
+#ifdef _GLIBCXX_USE_WCHAR_T
+ wcout.flush();
+ wcerr.flush();
+ wclog.flush();
+#endif
+ }
+ catch (...)
+ { }
+ }
}
// 27.4.2.5 ios_base storage functions
{
_M_streambuf_state |= badbit;
if (_M_streambuf_state & _M_exception)
- __throw_ios_failure("ios_base::_M_grow_words failure");
+ __throw_ios_failure("ios_base::_M_grow_words "
+ "allocation failed");
return _M_word_zero;
}
for (int i = 0; i < _M_word_size; i++)
{
_M_streambuf_state |= badbit;
if (_M_streambuf_state & _M_exception)
- __throw_ios_failure("ios_base::_M_grow_words failure");
+ __throw_ios_failure("ios_base::_M_grow_words is not valid");
return _M_word_zero;
}
}
_M_precision = 6;
_M_width = 0;
_M_flags = skipws | dec;
- _M_callbacks = 0;
_M_ios_locale = locale();
}
return __old;
}
- ios_base::ios_base() : _M_callbacks(0), _M_word_size(_S_local_word_size),
- _M_word(_M_local_word), _M_locale_cache(0)
+ ios_base::ios_base()
+ : _M_callbacks(0), _M_word_size(_S_local_word_size), _M_word(_M_local_word)
{
// Do nothing: basic_ios::init() does it.
// NB: _M_callbacks and _M_word must be zero for non-initialized
bool
ios_base::sync_with_stdio(bool __sync)
{
-#ifdef _GLIBCPP_RESOLVE_LIB_DEFECTS
+#ifdef _GLIBCXX_RESOLVE_LIB_DEFECTS
// 49. Underspecification of ios_base::sync_with_stdio
bool __ret = ios_base::Init::_S_synced_with_stdio;
#endif
// currently synchronized.
if (!__sync && __ret)
{
- ios_base::Init::_S_synced_with_stdio = false;
- ios_base::Init::_S_ios_destroy();
- ios_base::Init::_S_ios_create(ios_base::Init::_S_synced_with_stdio);
+ ios_base::Init::_S_synced_with_stdio = __sync;
+
+ // Explicitly call dtors to free any memory that is
+ // dynamically allocated by filebuf ctor or member functions,
+ // but don't deallocate all memory by calling operator delete.
+ buf_cout_sync.~stdio_sync_filebuf<char>();
+ buf_cin_sync.~stdio_sync_filebuf<char>();
+ buf_cerr_sync.~stdio_sync_filebuf<char>();
+
+#ifdef _GLIBCXX_USE_WCHAR_T
+ buf_wcout_sync.~stdio_sync_filebuf<wchar_t>();
+ buf_wcin_sync.~stdio_sync_filebuf<wchar_t>();
+ buf_wcerr_sync.~stdio_sync_filebuf<wchar_t>();
+#endif
+
+ // Create stream buffers for the standard streams and use
+ // those buffers without destroying and recreating the
+ // streams.
+ new (&buf_cout) stdio_filebuf<char>(stdout, ios_base::out);
+ new (&buf_cin) stdio_filebuf<char>(stdin, ios_base::in);
+ new (&buf_cerr) stdio_filebuf<char>(stderr, ios_base::out);
+ cout.rdbuf(&buf_cout);
+ cin.rdbuf(&buf_cin);
+ cerr.rdbuf(&buf_cerr);
+ clog.rdbuf(&buf_cerr);
+
+#ifdef _GLIBCXX_USE_WCHAR_T
+ new (&buf_wcout) stdio_filebuf<wchar_t>(stdout, ios_base::out);
+ new (&buf_wcin) stdio_filebuf<wchar_t>(stdin, ios_base::in);
+ new (&buf_wcerr) stdio_filebuf<wchar_t>(stderr, ios_base::out);
+ wcout.rdbuf(&buf_wcout);
+ wcin.rdbuf(&buf_wcin);
+ wcerr.rdbuf(&buf_wcerr);
+ wclog.rdbuf(&buf_wcerr);
+#endif
}
return __ret;
}
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