| /* $Id$ |
| * |
| * 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. |
| */ |
| |
| #ifdef ATOMIC_OPERATION_INC_HEADER |
| #endif |
| |
| #ifdef ATOMIC_OPERATION_INC_MEMBER |
| #endif |
| |
| #ifdef ATOMIC_OPERATION_INC_IMPL |
| inline uint32_t AtomicOperation::AtomicAdd32(volatile uint32_t &mem, uint32_t summand) { |
| //This code comes from the Apache APR project (apache-apr/1.4.2/atomic/unix/ia32.c) |
| asm volatile ("lock; xadd %0,%1" |
| : "=r" (summand), "=m" (mem) |
| : "0" (summand), "m" (mem) |
| : "memory", "cc"); |
| |
| return summand; |
| } |
| |
| inline uint32_t AtomicOperation::AtomicSub32(volatile uint32_t &mem, uint32_t subtrahend) { |
| //This code comes from the Apache APR project (apache-apr/1.4.2/atomic/unix/ia32.c) |
| |
| int32_t summand = subtrahend * -1; |
| asm volatile ("lock; xadd %0,%1" |
| : "=r" (summand), "=m" (mem) |
| : "0" (summand), "m" (mem) |
| : "memory", "cc"); |
| |
| return summand; |
| } |
| |
| inline uint32_t AtomicOperation::AtomicInc32(volatile uint32_t &mem) { |
| return AtomicAdd32(mem, 1); |
| } |
| |
| inline uint32_t AtomicOperation::AtomicDec32(volatile uint32_t &mem) { |
| return AtomicSub32(mem, 1); |
| } |
| #endif |
