casa-mp-base
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From 6edfb88a439f007e5b22f06389ff65fb20a8900a Mon Sep 17 00:00:00 2001From: David Fang <fang@csl.cornell.edu>Date: Wed, 15 Jan 2014 21:27:34 -0800Subject: [PATCH 3003/3003] implement atomic<> using mutex/lock_guard for 64b ops on 32b PPC not pretty, not fast, but passes atomic tests--- include/__atomic_locked | 240 ++++++++++++++++++++++++++++++++++++++++++++++++ include/atomic | 46 ++++++++++ 2 files changed, 286 insertions(+) create mode 100644 include/__atomic_lockeddiff --git llvm_master/projects/libcxx/include/__atomic_locked macports_master/projects/libcxx/include/__atomic_lockednew file mode 100644index 000000000..f10dd747e--- /dev/null+++ macports_master/projects/libcxx/include/__atomic_locked+// -*- C++ -*-+//===--------------------------- __atomic_locked --------------------------===//+//+// The LLVM Compiler Infrastructure+//+// This file is distributed under the University of Illinois Open Source+// License. See LICENSE.TXT for details.+//+//===----------------------------------------------------------------------===//++#ifndef _LIBCPP_ATOMIC_LOCKED+#define _LIBCPP_ATOMIC_LOCKED++#include <__mutex_base> // for mutex and lock_guard++/**+ This provides slow-but-usable lock-based atomic access to+ structures for which atomic lock-free functions are missing.+ This is motivated by the desire for 64b atomic operations+ on 32b PowerPC architectures. +**/++#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)+#pragma GCC system_header+#endif++_LIBCPP_BEGIN_NAMESPACE_STD++template <class _Tp, bool = is_integral<_Tp>::value && !is_same<_Tp, bool>::value>+struct __atomic_mutex_locked // false+{+ mutable _Atomic(_Tp) __a_;+ mutable mutex __lock_;+ typedef lock_guard<mutex> lock_type;++ _Tp& na(void) const { return reinterpret_cast<_Tp&>(__a_); }+ volatile _Tp& na(void) const volatile { return reinterpret_cast<volatile _Tp&>(__a_); }++ _LIBCPP_INLINE_VISIBILITY+ bool is_lock_free() const volatile _NOEXCEPT+ {return false;}+ _LIBCPP_INLINE_VISIBILITY+ bool is_lock_free() const _NOEXCEPT+ {return false;}+ _LIBCPP_INLINE_VISIBILITY