+2006-05-24 Paolo Carlini <pcarlini@suse.de>
+
+ PR libstdc++/24704
+ * include/bits/atomicity.h (__exchange_and_add_single,
+ __atomic_add_single): New, single thread versions of the atomic
+ functions.
+ (__exchange_and_add_dispatch, __atomic_add_dispatch): New,
+ depending on __GTHREADS and __gthread_active_p() dispatch either
+ to the above or to the existing atomic functions.
+ * include/ext/pool_allocator.h: Update callers.
+ * include/ext/rc_string_base.h: Likewise.
+ * include/bits/locale_classes.h: Likewise.
+ * include/bits/basic_string.h: Likewise.
+ * include/bits/ios_base.h: Likewise.
+ * include/tr1/boost_shared_ptr.h: Likewise.
+ * src/ios.cc: Likewise.
+ * src/locale.cc: Likewise.
+ * src/ios_init.cc: Likewise.
+
2006-05-23 Paolo Carlini <pcarlini@suse.de>
* testsuite/testsuite_shared.cc: Fix --enable-threads=single build.
// Low-level functions for atomic operations -*- C++ -*-
-// Copyright (C) 2004, 2005 Free Software Foundation, Inc.
+// Copyright (C) 2004, 2005, 2006 Free Software Foundation, Inc.
//
// This file is part of the GNU ISO C++ Library. This library is free
// software; you can redistribute it and/or modify it under the
#define _GLIBCXX_ATOMICITY_H 1
#include <bits/c++config.h>
+#include <bits/gthr.h>
#include <bits/atomic_word.h>
_GLIBCXX_BEGIN_NAMESPACE(__gnu_cxx)
- _Atomic_word
+ _Atomic_word
__attribute__ ((__unused__))
__exchange_and_add(volatile _Atomic_word* __mem, int __val);
__attribute__ ((__unused__))
__atomic_add(volatile _Atomic_word* __mem, int __val);
+ static inline _Atomic_word
+ __exchange_and_add_single(volatile _Atomic_word* __mem, int __val)
+ {
+ _Atomic_word __result = *__mem;
+ *__mem += __val;
+ return __result;
+ }
+
+ static inline void
+ __atomic_add_single(volatile _Atomic_word* __mem, int __val)
+ { *__mem += __val; }
+
+ static inline _Atomic_word
+ __attribute__ ((__unused__))
+ __exchange_and_add_dispatch(volatile _Atomic_word* __mem, int __val)
+ {
+#ifdef __GTHREADS
+
+ if (__gthread_active_p())
+ return __exchange_and_add(__mem, __val);
+ else
+ return __exchange_and_add_single(__mem, __val);
+
+#else
+
+ return __exchange_and_add_single(__mem, __val);
+
+#endif
+ }
+
+ static inline void
+ __attribute__ ((__unused__))
+ __atomic_add_dispatch(volatile _Atomic_word* __mem, int __val)
+ {
+#ifdef __GTHREADS
+
+ if (__gthread_active_p())
+ __atomic_add(__mem, __val);
+ else
+ __atomic_add_single(__mem, __val);
+
+#else
+
+ __atomic_add_single(__mem, __val);
+
+#endif
+ }
+
_GLIBCXX_END_NAMESPACE
/* Even if the CPU doesn't need a memory barrier, we need to ensure that
// Components for manipulating sequences of characters -*- C++ -*-
-// Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005
+// Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006
// Free Software Foundation, Inc.
//
// This file is part of the GNU ISO C++ Library. This library is free
#ifndef _GLIBCXX_FULLY_DYNAMIC_STRING
if (__builtin_expect(this != &_S_empty_rep(), false))
#endif
- if (__gnu_cxx::__exchange_and_add(&this->_M_refcount, -1) <= 0)
+ if (__gnu_cxx::__exchange_and_add_dispatch(&this->_M_refcount,
+ -1) <= 0)
_M_destroy(__a);
} // XXX MT
#ifndef _GLIBCXX_FULLY_DYNAMIC_STRING
if (__builtin_expect(this != &_S_empty_rep(), false))
#endif
- __gnu_cxx::__atomic_add(&this->_M_refcount, 1);
+ __gnu_cxx::__atomic_add_dispatch(&this->_M_refcount, 1);
return _M_refdata();
} // XXX MT
: _M_next(__cb), _M_fn(__fn), _M_index(__index), _M_refcount(0) { }
void
- _M_add_reference() { __gnu_cxx::__atomic_add(&_M_refcount, 1); }
+ _M_add_reference() { __gnu_cxx::__atomic_add_dispatch(&_M_refcount, 1); }
// 0 => OK to delete.
int
_M_remove_reference()
- { return __gnu_cxx::__exchange_and_add(&_M_refcount, -1); }
+ { return __gnu_cxx::__exchange_and_add_dispatch(&_M_refcount, -1); }
};
_Callback_list* _M_callbacks;
private:
inline void
_M_add_reference() const throw()
- { __gnu_cxx::__atomic_add(&_M_refcount, 1); }
+ { __gnu_cxx::__atomic_add_dispatch(&_M_refcount, 1); }
inline void
_M_remove_reference() const throw()
{
- if (__gnu_cxx::__exchange_and_add(&_M_refcount, -1) == 1)
+ if (__gnu_cxx::__exchange_and_add_dispatch(&_M_refcount, -1) == 1)
{
try
{ delete this; }
inline void
_M_add_reference() throw()
- { __gnu_cxx::__atomic_add(&_M_refcount, 1); }
+ { __gnu_cxx::__atomic_add_dispatch(&_M_refcount, 1); }
inline void
_M_remove_reference() throw()
{
- if (__gnu_cxx::__exchange_and_add(&_M_refcount, -1) == 1)
+ if (__gnu_cxx::__exchange_and_add_dispatch(&_M_refcount, -1) == 1)
{
try
{ delete this; }
if (_S_force_new == 0)
{
if (std::getenv("GLIBCXX_FORCE_NEW"))
- __atomic_add(&_S_force_new, 1);
+ __atomic_add_dispatch(&_S_force_new, 1);
else
- __atomic_add(&_S_force_new, -1);
+ __atomic_add_dispatch(&_S_force_new, -1);
}
const size_t __bytes = __n * sizeof(_Tp);
// Reference-counted versatile string base -*- C++ -*-
-// Copyright (C) 2005 Free Software Foundation, Inc.
+// Copyright (C) 2005, 2006 Free Software Foundation, Inc.
//
// This file is part of the GNU ISO C++ Library. This library is free
// software; you can redistribute it and/or modify it under the
_CharT*
_M_refcopy() throw()
{
- __atomic_add(&_M_info._M_refcount, 1);
+ __atomic_add_dispatch(&_M_info._M_refcount, 1);
return _M_refdata();
} // XXX MT
void
_M_dispose()
{
- if (__exchange_and_add(&_M_rep()->_M_info._M_refcount, -1) <= 0)
+ if (__exchange_and_add_dispatch(&_M_rep()->_M_info._M_refcount,
+ -1) <= 0)
_M_rep()->_M_destroy(_M_get_allocator());
} // XXX MT
void
add_ref_copy()
{
- __gnu_cxx::__atomic_add(&_M_use_count, 1);
+ __gnu_cxx::__atomic_add_dispatch(&_M_use_count, 1);
}
void
add_ref_lock()
{
__gnu_cxx::lock lock(_M_mutex);
- if (__gnu_cxx::__exchange_and_add(&_M_use_count, 1) == 0)
+ if (__gnu_cxx::__exchange_and_add_dispatch(&_M_use_count, 1) == 0)
{
_M_use_count = 0;
__throw_bad_weak_ptr();
void
release() // nothrow
{
- if (__gnu_cxx::__exchange_and_add(&_M_use_count, -1) == 1)
+ if (__gnu_cxx::__exchange_and_add_dispatch(&_M_use_count, -1) == 1)
{
dispose();
#ifdef __GTHREADS
_GLIBCXX_READ_MEM_BARRIER;
_GLIBCXX_WRITE_MEM_BARRIER;
#endif
- if (__gnu_cxx::__exchange_and_add(&_M_weak_count, -1) == 1)
+ if (__gnu_cxx::__exchange_and_add_dispatch(&_M_weak_count, -1) == 1)
destroy();
}
}
void
weak_add_ref() // nothrow
{
- __gnu_cxx::__atomic_add(&_M_weak_count, 1);
+ __gnu_cxx::__atomic_add_dispatch(&_M_weak_count, 1);
}
void
weak_release() // nothrow
{
- if (__gnu_cxx::__exchange_and_add(&_M_weak_count, -1) == 1)
+ if (__gnu_cxx::__exchange_and_add_dispatch(&_M_weak_count, -1) == 1)
{
#ifdef __GTHREADS
_GLIBCXX_READ_MEM_BARRIER;
// Implementation note: Initialize top to zero to ensure that
// initialization occurs before main() is started.
static _Atomic_word _S_top = 0;
- return __gnu_cxx::__exchange_and_add(&_S_top, 1) + 4;
+ return __gnu_cxx::__exchange_and_add_dispatch(&_S_top, 1) + 4;
}
void
ios_base::Init::Init()
{
- if (__gnu_cxx::__exchange_and_add(&_S_refcount, 1) == 0)
+ if (__gnu_cxx::__exchange_and_add_dispatch(&_S_refcount, 1) == 0)
{
// Standard streams default to synced with "C" operations.
_S_synced_with_stdio = true;
// streams are not re-initialized with uses of ios_base::Init
// besides <iostream> static object, ie just using <ios> with
// ios_base::Init objects.
- __gnu_cxx::__atomic_add(&_S_refcount, 1);
+ __gnu_cxx::__atomic_add_dispatch(&_S_refcount, 1);
}
}
ios_base::Init::~Init()
{
- if (__gnu_cxx::__exchange_and_add(&_S_refcount, -1) == 2)
+ if (__gnu_cxx::__exchange_and_add_dispatch(&_S_refcount, -1) == 2)
{
// Catch any exceptions thrown by basic_ostream::flush()
try
_M_index = 1 + f->_M_id();
else
#endif
- _M_index = 1 + __gnu_cxx::__exchange_and_add(&_S_refcount, 1);
+ _M_index = 1 + __gnu_cxx::__exchange_and_add_dispatch(&_S_refcount,
+ 1);
}
return _M_index - 1;
}
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