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verified gcc-4.6.4.tar.bz2.sig;
imported gcc-4.6.4 source tree from verified upstream tarball.

downloading a git-generated archive based on the 'upstream' tag
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if you have obtained the source via the command 'git clone',
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1 files changed, 146 insertions, 0 deletions

diff --git a/libstdc++-v3/src/atomic.cc b/libstdc++-v3/src/atomic.cc
new file mode 100644
index 000000000..e655dd3e8
--- /dev/null
+++ b/libstdc++-v3/src/atomic.cc
@@ -0,0 +1,146 @@
+// Support for atomic operations -*- C++ -*-
+
+// Copyright (C) 2008, 2009, 2010
+// 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
+// terms of the GNU General Public License as published by the
+// Free Software Foundation; either version 3, or (at your option)
+// any later version.
+
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// Under Section 7 of GPL version 3, you are granted additional
+// permissions described in the GCC Runtime Library Exception, version
+// 3.1, as published by the Free Software Foundation.
+
+// You should have received a copy of the GNU General Public License and
+// a copy of the GCC Runtime Library Exception along with this program;
+// see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
+// <http://www.gnu.org/licenses/>.
+
+#include "gstdint.h"
+#include <atomic>
+#include <mutex>
+
+#define LOGSIZE 4
+
+namespace
+{
+#if defined(_GLIBCXX_HAS_GTHREADS) && defined(_GLIBCXX_USE_C99_STDINT_TR1)
+  std::mutex&
+  get_atomic_mutex()
+  {
+    static std::mutex atomic_mutex;
+    return atomic_mutex;
+  }
+#endif
+
+  std::__atomic_flag_base flag_table[ 1 << LOGSIZE ] =
+    {
+      ATOMIC_FLAG_INIT, ATOMIC_FLAG_INIT, ATOMIC_FLAG_INIT, ATOMIC_FLAG_INIT,
+      ATOMIC_FLAG_INIT, ATOMIC_FLAG_INIT, ATOMIC_FLAG_INIT, ATOMIC_FLAG_INIT,
+      ATOMIC_FLAG_INIT, ATOMIC_FLAG_INIT, ATOMIC_FLAG_INIT, ATOMIC_FLAG_INIT,
+      ATOMIC_FLAG_INIT, ATOMIC_FLAG_INIT, ATOMIC_FLAG_INIT, ATOMIC_FLAG_INIT,
+    };
+} // anonymous namespace
+
+namespace std _GLIBCXX_VISIBILITY(default)
+{
+_GLIBCXX_BEGIN_NAMESPACE_VERSION
+
+  namespace __atomic0
+  {
+    bool
+    atomic_flag::test_and_set(memory_order)
+    {
+#if defined(_GLIBCXX_HAS_GTHREADS) && defined(_GLIBCXX_USE_C99_STDINT_TR1)
+      lock_guard<mutex> __lock(get_atomic_mutex());
+#endif
+      bool result = _M_i;
+      _M_i = true;
+      return result;
+    }
+
+    void
+    atomic_flag::clear(memory_order)
+    {
+#if defined(_GLIBCXX_HAS_GTHREADS) && defined(_GLIBCXX_USE_C99_STDINT_TR1)
+      lock_guard<mutex> __lock(get_atomic_mutex());
+#endif
+      _M_i = false;
+    }
+
+  _GLIBCXX_BEGIN_EXTERN_C
+
+  bool
+  atomic_flag_test_and_set_explicit(__atomic_flag_base* __a,
+				    memory_order __m) _GLIBCXX_NOTHROW
+  {
+    atomic_flag* d = static_cast<atomic_flag*>(__a);
+    return d->test_and_set(__m);
+  }
+
+  void
+  atomic_flag_clear_explicit(__atomic_flag_base* __a,
+			     memory_order __m) _GLIBCXX_NOTHROW
+  {
+    atomic_flag* d = static_cast<atomic_flag*>(__a);
+    return d->clear(__m);
+  }
+
+  void
+  __atomic_flag_wait_explicit(__atomic_flag_base* __a,
+			      memory_order __x) _GLIBCXX_NOTHROW
+  {
+    while (atomic_flag_test_and_set_explicit(__a, __x))
+      { };
+  }
+
+  _GLIBCXX_CONST __atomic_flag_base*
+  __atomic_flag_for_address(const volatile void* __z) _GLIBCXX_NOTHROW
+  {
+    uintptr_t __u = reinterpret_cast<uintptr_t>(__z);
+    __u += (__u >> 2) + (__u << 4);
+    __u += (__u >> 7) + (__u << 5);
+    __u += (__u >> 17) + (__u << 13);
+    if (sizeof(uintptr_t) > 4)
+      __u += (__u >> 31);
+    __u &= ~((~uintptr_t(0)) << LOGSIZE);
+    return flag_table + __u;
+  }
+
+  _GLIBCXX_END_EXTERN_C
+
+  } // namespace __atomic0
+
+_GLIBCXX_END_NAMESPACE_VERSION
+} // namespace
+
+
+// XXX GLIBCXX_ABI Deprecated
+// gcc-4.5.0
+// <atomic> signature changes
+
+// The rename syntax for default exported names is
+//   asm (".symver name1,exportedname@GLIBCXX_3.4")
+//   asm (".symver name2,exportedname@@GLIBCXX_3.4.5")
+// In the future, GLIBCXX_ABI > 6 should remove all uses of
+// _GLIBCXX_*_SYMVER macros in this file.
+
+#if defined(_GLIBCXX_SYMVER_GNU) && defined(PIC) \
+    && defined(_GLIBCXX_HAVE_AS_SYMVER_DIRECTIVE) \
+    && defined(_GLIBCXX_HAVE_SYMVER_SYMBOL_RENAMING_RUNTIME_SUPPORT)
+
+#define _GLIBCXX_ASM_SYMVER(cur, old, version) \
+   asm (".symver " #cur "," #old "@@" #version);
+
+_GLIBCXX_ASM_SYMVER(_ZNSt9__atomic011atomic_flag5clearESt12memory_order, _ZNVSt9__atomic011atomic_flag5clearESt12memory_order, GLIBCXX_3.4.11)
+
+_GLIBCXX_ASM_SYMVER(_ZNSt9__atomic011atomic_flag12test_and_setESt12memory_order, _ZNVSt9__atomic011atomic_flag12test_and_setESt12memory_order, GLIBCXX_3.4.11)
+
+#endif