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910.5.2
by Monty Taylor
Applied atomic patch to current tree. |
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/* -*- mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; -*-
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* vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
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*
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* Copyright (C) 2009 Sun Microsystems
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef DRIZZLED_ATOMIC_GCC_TRAITS_H
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#define DRIZZLED_ATOMIC_GCC_TRAITS_H
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namespace tbb { |
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namespace internal { |
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template<typename T, typename D> |
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class gcc_traits |
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{
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public: |
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typedef T value_type; |
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gcc_traits() {} |
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/* YES. I know these are semantically backwards...
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* so... TODO: Ensure we're doing the "right" thing here
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*/
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inline value_type fetch_and_add(volatile value_type *value, D addend ) |
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{
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return __sync_add_and_fetch(value, addend); |
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}
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inline value_type fetch_and_increment(volatile value_type *value) |
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{
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return __sync_add_and_fetch(value, 1); |
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}
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inline value_type fetch_and_decrement(volatile value_type *value) |
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{
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return __sync_sub_and_fetch(value, 1); |
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}
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inline value_type fetch_and_store(volatile value_type *value, |
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value_type new_value) |
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{
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/* TODO: Is this the right one? */
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return __sync_lock_test_and_set(value, new_value); |
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}
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inline value_type compare_and_swap(volatile value_type *value, |
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value_type new_value, |
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value_type comparand ) |
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{
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return __sync_val_compare_and_swap(value, comparand, new_value); |
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}
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inline value_type fetch(const volatile value_type *value) const volatile |
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{
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return __sync_add_and_fetch(const_cast<value_type *>(value), 0); |
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}
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inline value_type store_with_release(volatile value_type *value, |
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value_type new_value) |
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{
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*value= new_value; |
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return *value; |
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}
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}; /* gcc_traits */ |
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} /* namespace internal */ |
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} /* namespace tbb */ |
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#endif /* DRIZZLED_ATOMIC_GCC_TRAITS_H */ |