1251875Speter/* Licensed to the Apache Software Foundation (ASF) under one or more 2251875Speter * contributor license agreements. See the NOTICE file distributed with 3251875Speter * this work for additional information regarding copyright ownership. 4251875Speter * The ASF licenses this file to You under the Apache License, Version 2.0 5251875Speter * (the "License"); you may not use this file except in compliance with 6251875Speter * the License. You may obtain a copy of the License at 7251875Speter * 8251875Speter * http://www.apache.org/licenses/LICENSE-2.0 9251875Speter * 10251875Speter * Unless required by applicable law or agreed to in writing, software 11251875Speter * distributed under the License is distributed on an "AS IS" BASIS, 12251875Speter * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13251875Speter * See the License for the specific language governing permissions and 14251875Speter * limitations under the License. 15251875Speter */ 16251875Speter 17251875Speter#include "apr_arch_atomic.h" 18251875Speter 19251875Speter#ifdef USE_ATOMICS_BUILTINS 20251875Speter 21251875SpeterAPR_DECLARE(apr_status_t) apr_atomic_init(apr_pool_t *p) 22251875Speter{ 23251875Speter return APR_SUCCESS; 24251875Speter} 25251875Speter 26251875SpeterAPR_DECLARE(apr_uint32_t) apr_atomic_read32(volatile apr_uint32_t *mem) 27251875Speter{ 28251875Speter return *mem; 29251875Speter} 30251875Speter 31251875SpeterAPR_DECLARE(void) apr_atomic_set32(volatile apr_uint32_t *mem, apr_uint32_t val) 32251875Speter{ 33251875Speter *mem = val; 34251875Speter} 35251875Speter 36251875SpeterAPR_DECLARE(apr_uint32_t) apr_atomic_add32(volatile apr_uint32_t *mem, apr_uint32_t val) 37251875Speter{ 38251875Speter return __sync_fetch_and_add(mem, val); 39251875Speter} 40251875Speter 41251875SpeterAPR_DECLARE(void) apr_atomic_sub32(volatile apr_uint32_t *mem, apr_uint32_t val) 42251875Speter{ 43251875Speter __sync_fetch_and_sub(mem, val); 44251875Speter} 45251875Speter 46251875SpeterAPR_DECLARE(apr_uint32_t) apr_atomic_inc32(volatile apr_uint32_t *mem) 47251875Speter{ 48251875Speter return __sync_fetch_and_add(mem, 1); 49251875Speter} 50251875Speter 51251875SpeterAPR_DECLARE(int) apr_atomic_dec32(volatile apr_uint32_t *mem) 52251875Speter{ 53251875Speter return __sync_sub_and_fetch(mem, 1); 54251875Speter} 55251875Speter 56251875SpeterAPR_DECLARE(apr_uint32_t) apr_atomic_cas32(volatile apr_uint32_t *mem, apr_uint32_t with, 57251875Speter apr_uint32_t cmp) 58251875Speter{ 59251875Speter return __sync_val_compare_and_swap(mem, cmp, with); 60251875Speter} 61251875Speter 62251875SpeterAPR_DECLARE(apr_uint32_t) apr_atomic_xchg32(volatile apr_uint32_t *mem, apr_uint32_t val) 63251875Speter{ 64251875Speter __sync_synchronize(); 65251875Speter 66251875Speter return __sync_lock_test_and_set(mem, val); 67251875Speter} 68251875Speter 69251875SpeterAPR_DECLARE(void*) apr_atomic_casptr(volatile void **mem, void *with, const void *cmp) 70251875Speter{ 71251875Speter return (void*) __sync_val_compare_and_swap(mem, cmp, with); 72251875Speter} 73251875Speter 74251875SpeterAPR_DECLARE(void*) apr_atomic_xchgptr(volatile void **mem, void *with) 75251875Speter{ 76251875Speter __sync_synchronize(); 77251875Speter 78251875Speter return (void*) __sync_lock_test_and_set(mem, with); 79251875Speter} 80251875Speter 81251875Speter#endif /* USE_ATOMICS_BUILTINS */ 82