diff options
Diffstat (limited to 'M4-RCs/qpid/cpp/src/qpid/sys/AtomicValue_gcc.h')
-rw-r--r-- | M4-RCs/qpid/cpp/src/qpid/sys/AtomicValue_gcc.h | 68 |
1 files changed, 0 insertions, 68 deletions
diff --git a/M4-RCs/qpid/cpp/src/qpid/sys/AtomicValue_gcc.h b/M4-RCs/qpid/cpp/src/qpid/sys/AtomicValue_gcc.h deleted file mode 100644 index d022b07c1d..0000000000 --- a/M4-RCs/qpid/cpp/src/qpid/sys/AtomicValue_gcc.h +++ /dev/null @@ -1,68 +0,0 @@ -#ifndef QPID_SYS_ATOMICVALUE_GCC_H -#define QPID_SYS_ATOMICVALUE_GCC_H - -/* - * - * Licensed to the Apache Software Foundation (ASF) under one - * or more contributor license agreements. See the NOTICE file - * distributed with this work for additional information - * regarding copyright ownership. The ASF licenses this file - * to you under the Apache License, Version 2.0 (the - * "License"); you may not use this file except in compliance - * with the License. You may obtain a copy of the License at - * - * http://www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, - * software distributed under the License is distributed on an - * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY - * KIND, either express or implied. See the License for the - * specific language governing permissions and limitations - * under the License. - * - */ - -#if !defined(QPID_SYS_ATOMICVALUE_H) -#error "This file should only be included via AtomicValue.h." -#endif - -namespace qpid { -namespace sys { - -/** - * Atomic value of type T. T must be an integral type of size 1,2,4 or 8 bytes. - * All operations are atomic and preform a full memory barrier unless otherwise noted. - */ -template <class T> -class AtomicValue -{ - public: - AtomicValue(T init=0) : value(init) {} - - // Update and return new value. - inline T operator+=(T n) { return __sync_add_and_fetch(&value, n); } - inline T operator-=(T n) { return __sync_sub_and_fetch(&value, n); } - inline T operator++() { return *this += 1; } - inline T operator--() { return *this -= 1; } - - // Update and return old value. - inline T fetchAndAdd(T n) { return __sync_fetch_and_add(&value, n); } - inline T fetchAndSub(T n) { return __sync_fetch_and_sub(&value, n); } - inline T operator++(int) { return fetchAndAdd(1); } - inline T operator--(int) { return fetchAndSub(1); } - - /** If current value == testval then set to newval. Returns the old value. */ - T valueCompareAndSwap(T testval, T newval) { return __sync_val_compare_and_swap(&value, testval, newval); } - - /** If current value == testval then set to newval. Returns true if the swap was performed. */ - bool boolCompareAndSwap(T testval, T newval) { return __sync_bool_compare_and_swap(&value, testval, newval); } - - T get() const { return const_cast<AtomicValue<T>*>(this)->fetchAndAdd(static_cast<T>(0)); } - - private: - T value; -}; - -}} // namespace qpid::sys - -#endif /*!QPID_SYS_ATOMICVALUE_GCC_H*/ |