| /* 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. |
| */ |
| |
| #include "apr_arch_atomic.h" |
| |
| #ifdef USE_ATOMICS_BUILTINS |
| |
| APR_DECLARE(apr_status_t) apr_atomic_init(apr_pool_t *p) |
| { |
| return APR_SUCCESS; |
| } |
| |
| APR_DECLARE(apr_uint32_t) apr_atomic_read32(volatile apr_uint32_t *mem) |
| { |
| return *mem; |
| } |
| |
| APR_DECLARE(void) apr_atomic_set32(volatile apr_uint32_t *mem, apr_uint32_t val) |
| { |
| *mem = val; |
| } |
| |
| APR_DECLARE(apr_uint32_t) apr_atomic_add32(volatile apr_uint32_t *mem, apr_uint32_t val) |
| { |
| return __sync_fetch_and_add(mem, val); |
| } |
| |
| APR_DECLARE(void) apr_atomic_sub32(volatile apr_uint32_t *mem, apr_uint32_t val) |
| { |
| __sync_fetch_and_sub(mem, val); |
| } |
| |
| APR_DECLARE(apr_uint32_t) apr_atomic_inc32(volatile apr_uint32_t *mem) |
| { |
| return __sync_fetch_and_add(mem, 1); |
| } |
| |
| APR_DECLARE(int) apr_atomic_dec32(volatile apr_uint32_t *mem) |
| { |
| return __sync_sub_and_fetch(mem, 1); |
| } |
| |
| APR_DECLARE(apr_uint32_t) apr_atomic_cas32(volatile apr_uint32_t *mem, apr_uint32_t with, |
| apr_uint32_t cmp) |
| { |
| return __sync_val_compare_and_swap(mem, cmp, with); |
| } |
| |
| APR_DECLARE(apr_uint32_t) apr_atomic_xchg32(volatile apr_uint32_t *mem, apr_uint32_t val) |
| { |
| __sync_synchronize(); |
| |
| return __sync_lock_test_and_set(mem, val); |
| } |
| |
| APR_DECLARE(void*) apr_atomic_casptr(void *volatile *mem, void *with, const void *cmp) |
| { |
| return (void*) __sync_val_compare_and_swap(mem, cmp, with); |
| } |
| |
| APR_DECLARE(void*) apr_atomic_xchgptr(void *volatile *mem, void *with) |
| { |
| __sync_synchronize(); |
| |
| return (void*) __sync_lock_test_and_set(mem, with); |
| } |
| |
| #endif /* USE_ATOMICS_BUILTINS */ |