From 554fd8c5195424bdbcabf5de30fdc183aba391bd Mon Sep 17 00:00:00 2001 From: upstream source tree Date: Sun, 15 Mar 2015 20:14:05 -0400 Subject: obtained gcc-4.6.4.tar.bz2 from upstream website; 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 should provide you with a source tree that is binary identical to the one extracted from the above tarball. if you have obtained the source via the command 'git clone', however, do note that line-endings of files in your working directory might differ from line-endings of the respective files in the upstream repository. --- libstdc++-v3/include/bits/atomic_base.h | 295 ++++++++++++++++++++++++++++++++ 1 file changed, 295 insertions(+) create mode 100644 libstdc++-v3/include/bits/atomic_base.h (limited to 'libstdc++-v3/include/bits/atomic_base.h') diff --git a/libstdc++-v3/include/bits/atomic_base.h b/libstdc++-v3/include/bits/atomic_base.h new file mode 100644 index 000000000..272a4cd4c --- /dev/null +++ b/libstdc++-v3/include/bits/atomic_base.h @@ -0,0 +1,295 @@ +// -*- C++ -*- header. + +// Copyright (C) 2008, 2009, 2010, 2011 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 +// . + +/** @file bits/atomic_base.h + * This is an internal header file, included by other library headers. + * Do not attempt to use it directly. @headername{atomic} + */ + +#ifndef _GLIBCXX_ATOMIC_BASE_H +#define _GLIBCXX_ATOMIC_BASE_H 1 + +#pragma GCC system_header + +#include +#include +#include + +namespace std _GLIBCXX_VISIBILITY(default) +{ +_GLIBCXX_BEGIN_NAMESPACE_VERSION + + /** + * @defgroup atomics Atomics + * + * Components for performing atomic operations. + * @{ + */ + + /// Enumeration for memory_order + typedef enum memory_order + { + memory_order_relaxed, + memory_order_consume, + memory_order_acquire, + memory_order_release, + memory_order_acq_rel, + memory_order_seq_cst + } memory_order; + + inline memory_order + __calculate_memory_order(memory_order __m) + { + const bool __cond1 = __m == memory_order_release; + const bool __cond2 = __m == memory_order_acq_rel; + memory_order __mo1(__cond1 ? memory_order_relaxed : __m); + memory_order __mo2(__cond2 ? memory_order_acquire : __mo1); + return __mo2; + } + + void + atomic_thread_fence(memory_order); + + void + atomic_signal_fence(memory_order); + + /// kill_dependency + template + inline _Tp + kill_dependency(_Tp __y) + { + _Tp __ret(__y); + return __ret; + } + + /** + * @brief Base type for atomic_flag. + * + * Base type is POD with data, allowing atomic_flag to derive from + * it and meet the standard layout type requirement. In addition to + * compatibilty with a C interface, this allows different + * implementations of atomic_flag to use the same atomic operation + * functions, via a standard conversion to the __atomic_flag_base + * argument. + */ + _GLIBCXX_BEGIN_EXTERN_C + + struct __atomic_flag_base + { + bool _M_i; + }; + + _GLIBCXX_END_EXTERN_C + +#define ATOMIC_FLAG_INIT { false } + + + // Base types for atomics. + // + // Three nested namespaces for atomic implementation details. + // + // The nested namespace inlined into std:: is determined by the value + // of the _GLIBCXX_ATOMIC_PROPERTY macro and the resulting + // ATOMIC_*_LOCK_FREE macros. + // + // 0 == __atomic0 == Never lock-free + // 1 == __atomic1 == Best available, sometimes lock-free + // 2 == __atomic2 == Always lock-free + + namespace __atomic0 + { + struct atomic_flag; + + template + struct __atomic_base; + } + + namespace __atomic2 + { + struct atomic_flag; + + template + struct __atomic_base; + } + + namespace __atomic1 + { + using __atomic2::atomic_flag; + using __atomic0::__atomic_base; + } + + /// Lock-free Property +#if defined(_GLIBCXX_ATOMIC_BUILTINS_1) && defined(_GLIBCXX_ATOMIC_BUILTINS_2) \ + && defined(_GLIBCXX_ATOMIC_BUILTINS_4) && defined(_GLIBCXX_ATOMIC_BUILTINS_8) +# define _GLIBCXX_ATOMIC_PROPERTY 2 +# define _GLIBCXX_ATOMIC_NAMESPACE __atomic2 +#elif defined(_GLIBCXX_ATOMIC_BUILTINS_1) +# define _GLIBCXX_ATOMIC_PROPERTY 1 +# define _GLIBCXX_ATOMIC_NAMESPACE __atomic1 +#else +# define _GLIBCXX_ATOMIC_PROPERTY 0 +# define _GLIBCXX_ATOMIC_NAMESPACE __atomic0 +#endif + +#define ATOMIC_CHAR_LOCK_FREE _GLIBCXX_ATOMIC_PROPERTY +#define ATOMIC_CHAR16_T_LOCK_FREE _GLIBCXX_ATOMIC_PROPERTY +#define ATOMIC_CHAR32_T_LOCK_FREE _GLIBCXX_ATOMIC_PROPERTY +#define ATOMIC_WCHAR_T_LOCK_FREE _GLIBCXX_ATOMIC_PROPERTY +#define ATOMIC_SHORT_LOCK_FREE _GLIBCXX_ATOMIC_PROPERTY +#define ATOMIC_INT_LOCK_FREE _GLIBCXX_ATOMIC_PROPERTY +#define ATOMIC_LONG_LOCK_FREE _GLIBCXX_ATOMIC_PROPERTY +#define ATOMIC_LLONG_LOCK_FREE _GLIBCXX_ATOMIC_PROPERTY + + inline namespace _GLIBCXX_ATOMIC_NAMESPACE { } + + + /// atomic_char + typedef __atomic_base atomic_char; + + /// atomic_schar + typedef __atomic_base atomic_schar; + + /// atomic_uchar + typedef __atomic_base atomic_uchar; + + /// atomic_short + typedef __atomic_base atomic_short; + + /// atomic_ushort + typedef __atomic_base atomic_ushort; + + /// atomic_int + typedef __atomic_base atomic_int; + + /// atomic_uint + typedef __atomic_base atomic_uint; + + /// atomic_long + typedef __atomic_base atomic_long; + + /// atomic_ulong + typedef __atomic_base atomic_ulong; + + /// atomic_llong + typedef __atomic_base atomic_llong; + + /// atomic_ullong + typedef __atomic_base atomic_ullong; + + /// atomic_wchar_t + typedef __atomic_base atomic_wchar_t; + + /// atomic_char16_t + typedef __atomic_base atomic_char16_t; + + /// atomic_char32_t + typedef __atomic_base atomic_char32_t; + + /// atomic_char32_t + typedef __atomic_base atomic_char32_t; + + + /// atomic_int_least8_t + typedef __atomic_base atomic_int_least8_t; + + /// atomic_uint_least8_t + typedef __atomic_base atomic_uint_least8_t; + + /// atomic_int_least16_t + typedef __atomic_base atomic_int_least16_t; + + /// atomic_uint_least16_t + typedef __atomic_base atomic_uint_least16_t; + + /// atomic_int_least32_t + typedef __atomic_base atomic_int_least32_t; + + /// atomic_uint_least32_t + typedef __atomic_base atomic_uint_least32_t; + + /// atomic_int_least64_t + typedef __atomic_base atomic_int_least64_t; + + /// atomic_uint_least64_t + typedef __atomic_base atomic_uint_least64_t; + + + /// atomic_int_fast8_t + typedef __atomic_base atomic_int_fast8_t; + + /// atomic_uint_fast8_t + typedef __atomic_base atomic_uint_fast8_t; + + /// atomic_int_fast16_t + typedef __atomic_base atomic_int_fast16_t; + + /// atomic_uint_fast16_t + typedef __atomic_base atomic_uint_fast16_t; + + /// atomic_int_fast32_t + typedef __atomic_base atomic_int_fast32_t; + + /// atomic_uint_fast32_t + typedef __atomic_base atomic_uint_fast32_t; + + /// atomic_int_fast64_t + typedef __atomic_base atomic_int_fast64_t; + + /// atomic_uint_fast64_t + typedef __atomic_base atomic_uint_fast64_t; + + + /// atomic_intptr_t + typedef __atomic_base atomic_intptr_t; + + /// atomic_uintptr_t + typedef __atomic_base atomic_uintptr_t; + + /// atomic_size_t + typedef __atomic_base atomic_size_t; + + /// atomic_intmax_t + typedef __atomic_base atomic_intmax_t; + + /// atomic_uintmax_t + typedef __atomic_base atomic_uintmax_t; + + /// atomic_ptrdiff_t + typedef __atomic_base atomic_ptrdiff_t; + + +#define ATOMIC_VAR_INIT(_VI) { _VI } + + template + struct atomic; + + template + struct atomic<_Tp*>; + + // @} group atomics + +_GLIBCXX_END_NAMESPACE_VERSION +} // namespace std + +#endif -- cgit v1.2.3