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Diffstat (limited to 'gcc-4.4.3/libstdc++-v3/include/bits/atomic_2.h')
| -rw-r--r-- | gcc-4.4.3/libstdc++-v3/include/bits/atomic_2.h | 454 |
1 files changed, 0 insertions, 454 deletions
diff --git a/gcc-4.4.3/libstdc++-v3/include/bits/atomic_2.h b/gcc-4.4.3/libstdc++-v3/include/bits/atomic_2.h deleted file mode 100644 index 2815d599b..000000000 --- a/gcc-4.4.3/libstdc++-v3/include/bits/atomic_2.h +++ /dev/null @@ -1,454 +0,0 @@ -// -*- C++ -*- header. - -// Copyright (C) 2008, 2009 -// 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/>. - -/** @file bits/atomic_2.h - * This is an internal header file, included by other library headers. - * You should not attempt to use it directly. - */ - -#ifndef _GLIBCXX_ATOMIC_2_H -#define _GLIBCXX_ATOMIC_2_H 1 - -#pragma GCC system_header - -// _GLIBCXX_BEGIN_NAMESPACE(std) - -// 2 == __atomic2 == Always lock-free -// Assumed: -// _GLIBCXX_ATOMIC_BUILTINS_1 -// _GLIBCXX_ATOMIC_BUILTINS_2 -// _GLIBCXX_ATOMIC_BUILTINS_4 -// _GLIBCXX_ATOMIC_BUILTINS_8 -namespace __atomic2 -{ - /// atomic_flag - struct atomic_flag : public __atomic_flag_base - { - atomic_flag() = default; - ~atomic_flag() = default; - atomic_flag(const atomic_flag&) = delete; - atomic_flag& operator=(const atomic_flag&) = delete; - - // Conversion to ATOMIC_FLAG_INIT. - atomic_flag(bool __i): __atomic_flag_base({ __i }) { } - - bool - test_and_set(memory_order __m = memory_order_seq_cst) volatile - { - // Redundant synchronize if built-in for lock is a full barrier. - if (__m != memory_order_acquire && __m != memory_order_acq_rel) - __sync_synchronize(); - return __sync_lock_test_and_set(&_M_i, 1); - } - - void - clear(memory_order __m = memory_order_seq_cst) volatile - { - __glibcxx_assert(__m != memory_order_consume); - __glibcxx_assert(__m != memory_order_acquire); - __glibcxx_assert(__m != memory_order_acq_rel); - - __sync_lock_release(&_M_i); - if (__m != memory_order_acquire && __m != memory_order_acq_rel) - __sync_synchronize(); - } - }; - - - /// 29.4.2, address types - struct atomic_address - { - private: - void* _M_i; - - public: - atomic_address() = default; - ~atomic_address() = default; - atomic_address(const atomic_address&) = delete; - atomic_address& operator=(const atomic_address&) = delete; - - atomic_address(void* __v) { _M_i = __v; } - - bool - is_lock_free() const volatile - { return true; } - - void - store(void* __v, memory_order __m = memory_order_seq_cst) volatile - { - __glibcxx_assert(__m != memory_order_acquire); - __glibcxx_assert(__m != memory_order_acq_rel); - __glibcxx_assert(__m != memory_order_consume); - - if (__m == memory_order_relaxed) - _M_i = __v; - else - { - // write_mem_barrier(); - _M_i = __v; - if (__m == memory_order_seq_cst) - __sync_synchronize(); - } - } - - void* - load(memory_order __m = memory_order_seq_cst) const volatile - { - __glibcxx_assert(__m != memory_order_release); - __glibcxx_assert(__m != memory_order_acq_rel); - - __sync_synchronize(); - void* __ret = _M_i; - __sync_synchronize(); - return __ret; - } - - void* - exchange(void* __v, memory_order __m = memory_order_seq_cst) volatile - { - // XXX built-in assumes memory_order_acquire. - return __sync_lock_test_and_set(&_M_i, __v); - } - - bool - compare_exchange_weak(void*& __v1, void* __v2, memory_order __m1, - memory_order __m2) volatile - { return compare_exchange_strong(__v1, __v2, __m1, __m2); } - - bool - compare_exchange_weak(void*& __v1, void* __v2, - memory_order __m = memory_order_seq_cst) volatile - { - return compare_exchange_weak(__v1, __v2, __m, - __calculate_memory_order(__m)); - } - - bool - compare_exchange_strong(void*& __v1, void* __v2, memory_order __m1, - memory_order __m2) volatile - { - __glibcxx_assert(__m2 != memory_order_release); - __glibcxx_assert(__m2 != memory_order_acq_rel); - __glibcxx_assert(__m2 <= __m1); - - void* __v1o = __v1; - void* __v1n = __sync_val_compare_and_swap(&_M_i, __v1o, __v2); - - // Assume extra stores (of same value) allowed in true case. - __v1 = __v1n; - return __v1o == __v1n; - } - - bool - compare_exchange_strong(void*& __v1, void* __v2, - memory_order __m = memory_order_seq_cst) volatile - { - return compare_exchange_strong(__v1, __v2, __m, - __calculate_memory_order(__m)); - } - - void* - fetch_add(ptrdiff_t __d, memory_order __m = memory_order_seq_cst) volatile - { return __sync_fetch_and_add(&_M_i, __d); } - - void* - fetch_sub(ptrdiff_t __d, memory_order __m = memory_order_seq_cst) volatile - { return __sync_fetch_and_sub(&_M_i, __d); } - - operator void*() const volatile - { return load(); } - - void* - operator=(void* __v) // XXX volatile - { - store(__v); - return __v; - } - - void* - operator+=(ptrdiff_t __d) volatile - { return __sync_add_and_fetch(&_M_i, __d); } - - void* - operator-=(ptrdiff_t __d) volatile - { return __sync_sub_and_fetch(&_M_i, __d); } - }; - - // 29.3.1 atomic integral types - // For each of the integral types, define atomic_[integral type] struct - // - // atomic_bool bool - // atomic_char char - // atomic_schar signed char - // atomic_uchar unsigned char - // atomic_short short - // atomic_ushort unsigned short - // atomic_int int - // atomic_uint unsigned int - // atomic_long long - // atomic_ulong unsigned long - // atomic_llong long long - // atomic_ullong unsigned long long - // atomic_char16_t char16_t - // atomic_char32_t char32_t - // atomic_wchar_t wchar_t - - // Base type. - // NB: Assuming _ITp is an integral scalar type that is 1, 2, 4, or 8 bytes, - // since that is what GCC built-in functions for atomic memory access work on. - template<typename _ITp> - struct __atomic_base - { - private: - typedef _ITp __integral_type; - - __integral_type _M_i; - - public: - __atomic_base() = default; - ~__atomic_base() = default; - __atomic_base(const __atomic_base&) = delete; - __atomic_base& operator=(const __atomic_base&) = delete; - - // Requires __integral_type convertible to _M_base._M_i. - __atomic_base(__integral_type __i) { _M_i = __i; } - - operator __integral_type() const volatile - { return load(); } - - __integral_type - operator=(__integral_type __i) // XXX volatile - { - store(__i); - return __i; - } - - __integral_type - operator++(int) volatile - { return fetch_add(1); } - - __integral_type - operator--(int) volatile - { return fetch_sub(1); } - - __integral_type - operator++() volatile - { return __sync_add_and_fetch(&_M_i, 1); } - - __integral_type - operator--() volatile - { return __sync_sub_and_fetch(&_M_i, 1); } - - __integral_type - operator+=(__integral_type __i) volatile - { return __sync_add_and_fetch(&_M_i, __i); } - - __integral_type - operator-=(__integral_type __i) volatile - { return __sync_sub_and_fetch(&_M_i, __i); } - - __integral_type - operator&=(__integral_type __i) volatile - { return __sync_and_and_fetch(&_M_i, __i); } - - __integral_type - operator|=(__integral_type __i) volatile - { return __sync_or_and_fetch(&_M_i, __i); } - - __integral_type - operator^=(__integral_type __i) volatile - { return __sync_xor_and_fetch(&_M_i, __i); } - - bool - is_lock_free() const volatile - { return true; } - - void - store(__integral_type __i, - memory_order __m = memory_order_seq_cst) volatile - { - __glibcxx_assert(__m != memory_order_acquire); - __glibcxx_assert(__m != memory_order_acq_rel); - __glibcxx_assert(__m != memory_order_consume); - - if (__m == memory_order_relaxed) - _M_i = __i; - else - { - // write_mem_barrier(); - _M_i = __i; - if (__m == memory_order_seq_cst) - __sync_synchronize(); - } - } - - __integral_type - load(memory_order __m = memory_order_seq_cst) const volatile - { - __glibcxx_assert(__m != memory_order_release); - __glibcxx_assert(__m != memory_order_acq_rel); - - __sync_synchronize(); - __integral_type __ret = _M_i; - __sync_synchronize(); - return __ret; - } - - __integral_type - exchange(__integral_type __i, - memory_order __m = memory_order_seq_cst) volatile - { - // XXX built-in assumes memory_order_acquire. - return __sync_lock_test_and_set(&_M_i, __i); - } - - bool - compare_exchange_weak(__integral_type& __i1, __integral_type __i2, - memory_order __m1, memory_order __m2) volatile - { return compare_exchange_strong(__i1, __i2, __m1, __m2); } - - bool - compare_exchange_weak(__integral_type& __i1, __integral_type __i2, - memory_order __m = memory_order_seq_cst) volatile - { - return compare_exchange_weak(__i1, __i2, __m, - __calculate_memory_order(__m)); - } - - bool - compare_exchange_strong(__integral_type& __i1, __integral_type __i2, - memory_order __m1, memory_order __m2) volatile - { - __glibcxx_assert(__m2 != memory_order_release); - __glibcxx_assert(__m2 != memory_order_acq_rel); - __glibcxx_assert(__m2 <= __m1); - - __integral_type __i1o = __i1; - __integral_type __i1n = __sync_val_compare_and_swap(&_M_i, __i1o, __i2); - - // Assume extra stores (of same value) allowed in true case. - __i1 = __i1n; - return __i1o == __i1n; - } - - bool - compare_exchange_strong(__integral_type& __i1, __integral_type __i2, - memory_order __m = memory_order_seq_cst) volatile - { - return compare_exchange_strong(__i1, __i2, __m, - __calculate_memory_order(__m)); - } - - __integral_type - fetch_add(__integral_type __i, - memory_order __m = memory_order_seq_cst) volatile - { return __sync_fetch_and_add(&_M_i, __i); } - - __integral_type - fetch_sub(__integral_type __i, - memory_order __m = memory_order_seq_cst) volatile - { return __sync_fetch_and_sub(&_M_i, __i); } - - __integral_type - fetch_and(__integral_type __i, - memory_order __m = memory_order_seq_cst) volatile - { return __sync_fetch_and_and(&_M_i, __i); } - - __integral_type - fetch_or(__integral_type __i, - memory_order __m = memory_order_seq_cst) volatile - { return __sync_fetch_and_or(&_M_i, __i); } - - __integral_type - fetch_xor(__integral_type __i, - memory_order __m = memory_order_seq_cst) volatile - { return __sync_fetch_and_xor(&_M_i, __i); } - }; - - - /// atomic_bool - // NB: No operators or fetch-operations for this type. - struct atomic_bool - { - private: - __atomic_base<bool> _M_base; - - public: - atomic_bool() = default; - ~atomic_bool() = default; - atomic_bool(const atomic_bool&) = delete; - atomic_bool& operator=(const atomic_bool&) = delete; - - atomic_bool(bool __i) : _M_base(__i) { } - - bool - operator=(bool __i) // XXX volatile - { return _M_base.operator=(__i); } - - operator bool() const volatile - { return _M_base.load(); } - - bool - is_lock_free() const volatile - { return _M_base.is_lock_free(); } - - void - store(bool __i, memory_order __m = memory_order_seq_cst) volatile - { _M_base.store(__i, __m); } - - bool - load(memory_order __m = memory_order_seq_cst) const volatile - { return _M_base.load(__m); } - - bool - exchange(bool __i, memory_order __m = memory_order_seq_cst) volatile - { return _M_base.exchange(__i, __m); } - - bool - compare_exchange_weak(bool& __i1, bool __i2, memory_order __m1, - memory_order __m2) volatile - { return _M_base.compare_exchange_weak(__i1, __i2, __m1, __m2); } - - bool - compare_exchange_weak(bool& __i1, bool __i2, - memory_order __m = memory_order_seq_cst) volatile - { return _M_base.compare_exchange_weak(__i1, __i2, __m); } - - bool - compare_exchange_strong(bool& __i1, bool __i2, memory_order __m1, - memory_order __m2) volatile - { return _M_base.compare_exchange_strong(__i1, __i2, __m1, __m2); } - - - bool - compare_exchange_strong(bool& __i1, bool __i2, - memory_order __m = memory_order_seq_cst) volatile - { return _M_base.compare_exchange_strong(__i1, __i2, __m); } - }; -} // namespace __atomic2 - -// _GLIBCXX_END_NAMESPACE - -#endif |