localefwd.h: Format.

2001-07-03  Benjamin Kosnik  <bkoz@redhat.com>

	* include/bits/localefwd.h: Format.
	* include/bits/locale_facts.tcc (locale::combine): Adjust.
	* src/locale.cc (locale::locale::(_Impl)): Don't call
	_M_add_reference.
	(locale::facet::_M_remove_reference): Simplify.
	* src/globals.cc (locale_impl_c): New. Format.
	(locale_c): New.
	* src/ios.cc (ios_base::Init::Init): Increment _S_ios_base_init last.

From-SVN: r43747

libstdc++-v3/ChangeLog

+2001-07-03  Benjamin Kosnik  <bkoz@redhat.com>
+
+	* include/bits/localefwd.h: Format.	
+	* include/bits/locale_facts.tcc (locale::combine): Adjust.
+	* src/locale.cc (locale::locale::(_Impl)): Don't call
+	_M_add_reference.
+	(locale::facet::_M_remove_reference): Simplify.
+	* src/globals.cc (locale_impl_c): New. Format.
+	(locale_c): New.
+	* src/ios.cc (ios_base::Init::Init): Increment _S_ios_base_init last.
+
 2001-07-02  Loren J. Rittle  <ljrittle@acm.org>
 
 	* acinclude.m4 (GLIBCPP_ENABLE_THREADS): Protect variable from shell

libstdc++-v3/include/bits/locale_facets.tcc

@@ -48,7 +48,7 @@ namespace std
     locale
     locale::combine(const locale& __other)
     {
-      _Impl* __tmp = new _Impl(*_M_impl, 0);
+      _Impl* __tmp = new _Impl(*_M_impl, 1);
       __tmp->_M_replace_facet(__other._M_impl, &_Facet::id);
       return locale(__tmp);
     }

libstdc++-v3/include/bits/localefwd.h

@@ -451,9 +451,4 @@ namespace std
     has_facet(const locale& __loc) throw();
 } // namespace std
 
-#endif	/* _CPP_BITS_LOCCORE_H */
-
-// Local Variables:
-// mode:c++
-// End:
-
+#endif

libstdc++-v3/src/globals.cc

@@ -44,6 +44,17 @@
 // allocate the actual file buffers in this file.
 namespace std 
 {
+  // Standard "C" locale.
+  typedef char fake_locale_Impl[sizeof(locale::_Impl)]
+  __attribute__ ((aligned(__alignof__(locale::_Impl))));
+  fake_locale_Impl locale_impl_c;
+
+  typedef char fake_locale[sizeof(locale)]
+  __attribute__ ((aligned(__alignof__(locale))));
+  fake_locale locale_c;
+  
+
+  // Standard stream objects.
   typedef char fake_istream[sizeof(istream)]
   __attribute__ ((aligned(__alignof__(istream))));
   typedef char fake_ostream[sizeof(ostream)] 
@@ -76,30 +87,28 @@ namespace std
   fake_wfilebuf buf_wcerr;
 #endif
 
-// Globals for once-only runtime initialization of mutex objects.  This
-// allows static initialization of these objects on systems that need a
-// function call to initialize a mutex.  For example, see stl_threads.h.
+
+  // Globals for once-only runtime initialization of mutex objects.  This
+  // allows static initialization of these objects on systems that need a
+  // function call to initialize a mutex.  For example, see stl_threads.h.
 #if __GTHREADS
 #ifdef __GTHREAD_MUTEX_INIT
-// This path is not needed since static initialization of mutexs works
-// on this platform.
+  // This path is not needed since static initialization of mutexs works
+  // on this platform.
 #elif defined(__GTHREAD_MUTEX_INIT_FUNCTION)
-__gthread_once_t _GLIBCPP_once = __GTHREAD_ONCE_INIT;
-__gthread_mutex_t _GLIBCPP_mutex;
-__gthread_mutex_t *_GLIBCPP_mutex_address;
+  __gthread_once_t _GLIBCPP_once = __GTHREAD_ONCE_INIT;
+  __gthread_mutex_t _GLIBCPP_mutex;
+  __gthread_mutex_t *_GLIBCPP_mutex_address;
+  
+  // Once-only initializer function for _GLIBCPP_mutex.  
+  void
+  _GLIBCPP_mutex_init ()
+  { __GTHREAD_MUTEX_INIT_FUNCTION (&_GLIBCPP_mutex); }
 
-// Once-only initializer function for _GLIBCPP_mutex.  
-void
-_GLIBCPP_mutex_init ()
-{
-  __GTHREAD_MUTEX_INIT_FUNCTION (&_GLIBCPP_mutex);
-}
-// Once-only initializer function for _GLIBCPP_mutex_address.  
-void
-_GLIBCPP_mutex_address_init ()
-{
-  __GTHREAD_MUTEX_INIT_FUNCTION (_GLIBCPP_mutex_address);
-}
-#endif
+  // Once-only initializer function for _GLIBCPP_mutex_address.  
+  void
+  _GLIBCPP_mutex_address_init ()
+  { __GTHREAD_MUTEX_INIT_FUNCTION (_GLIBCPP_mutex_address); }
 #endif
+#endif // __GTHREADS
 }

libstdc++-v3/src/ios.cc

@@ -205,12 +205,13 @@ namespace std
 
   ios_base::Init::Init()
   {
-    if (++_S_ios_base_init == 1)
+    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);
       }
+    ++_S_ios_base_init;
   }
 
   ios_base::Init::~Init()

libstdc++-v3/src/locale.cc

@@ -43,6 +43,10 @@
 
 namespace std 
 {
+  // Defined in globals.cc.
+  extern locale::_Impl locale_impl_c;
+  extern locale locale_c;
+
   // Definitions for static const data members of locale.
   const locale::category 	locale::none;
   const locale::category 	locale::ctype;
@@ -362,10 +366,10 @@ namespace std
   locale::locale(const locale& __other) throw()
   { (_M_impl = __other._M_impl)->_M_add_reference(); }
 
-  // This is used to initialize global and classic locales.
-  locale::locale(_Impl* __ip) throw()
-  : _M_impl(__ip)
-  { __ip->_M_add_reference(); }
+  // This is used to initialize global and classic locales, and
+  // assumes that the _Impl objects are constructed correctly.
+  locale::locale(_Impl* __ip) throw() : _M_impl(__ip)
+  { }
 
   locale::locale(const char* __s)
   {
@@ -415,13 +419,18 @@ namespace std
   {
     // XXX MT
     _S_initialize();
-    locale __old(_S_global);
+    _Impl* __old = _S_global;
     __other._M_impl->_M_add_reference();
-    _S_global->_M_remove_reference();
     _S_global = __other._M_impl; 
     if (_S_global->_M_check_same_name() && _S_global->_M_names[0] != "*")
       setlocale(LC_ALL, __other.name().c_str());
-    return __old;
+
+    // Reference count sanity check: one reference removed for the
+    // subsition of __other locale, one added by return-by-value. Net
+    // difference: zero. When the returned locale object's destrutor
+    // is called, then the reference count is decremented and possibly
+    // destroyed.
+    return locale(__old);
   }
 
   string
@@ -446,7 +455,6 @@ namespace std
   locale const&
   locale::classic()
   {
-    static locale* __classic_locale;
     // XXX MT
     if (!_S_classic)
       {
@@ -454,26 +462,21 @@ namespace std
 	  {
 	    // 26 Standard facets, 2 references.
 	    // One reference for _M_classic, one for _M_global
-	    _S_classic = new _Impl("C", 2);
+	    _S_classic = new (&locale_impl_c) _Impl("C", 2);
 	    _S_global = _S_classic; 	    
-
-	    // Finesse static init order hassles
-	    __classic_locale = new locale(_S_classic);
+	    new (&locale_c) locale(_S_classic);
 	  }
 	catch(...) 
 	  {
-	    delete __classic_locale;
+	    // Just call destructor, so that locale_impl_c's memory is
+	    // not deallocated via a call to delete.
 	    if (_S_classic)
-	      {
-		_S_classic->_M_remove_reference();
-		_S_global->_M_remove_reference();
-	      }
+	      _S_classic->~_Impl();
 	    _S_classic = _S_global = 0;
-	    // XXX MT
 	    __throw_exception_again;
 	  }
       }
-    return *__classic_locale;
+    return locale_c;
   }
 
   locale::category
@@ -518,8 +521,7 @@ namespace std
   }
 
   locale::facet::
-  facet(size_t __refs) throw()
-  : _M_references(__refs) 
+  facet(size_t __refs) throw() : _M_references(__refs) 
   { }
 
   void  
@@ -531,12 +533,10 @@ namespace std
   locale::facet::
   _M_remove_reference() throw()
   {
-    if (_M_references)
-      --_M_references;
-    else
+    if (_M_references-- == 0)
       {
         try 
-	  { delete this; }  // XXX MT
+	  { delete this; }  
 	catch (...) 
 	  { }
       }