4705e3668d
components: apr-1.4.6 -> 1.4.8 and apr-util-1.4.1 -> 1.5.2. This is a post point-zero bug-fix / fix-sharp-edges release, including some workarounds for UTF-8 for people who haven't yet turned on WITH_ICONV.
156 lines
4.4 KiB
C
156 lines
4.4 KiB
C
/* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership.
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* The ASF licenses this file to You under the Apache License, Version 2.0
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* (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "apr_arch_atomic.h"
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#ifdef USE_ATOMICS_S390
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APR_DECLARE(apr_status_t) apr_atomic_init(apr_pool_t *p)
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{
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return APR_SUCCESS;
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}
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APR_DECLARE(apr_uint32_t) apr_atomic_read32(volatile apr_uint32_t *mem)
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{
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return *mem;
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}
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APR_DECLARE(void) apr_atomic_set32(volatile apr_uint32_t *mem, apr_uint32_t val)
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{
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*mem = val;
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}
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static APR_INLINE apr_uint32_t atomic_add(volatile apr_uint32_t *mem, apr_uint32_t val)
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{
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apr_uint32_t prev = *mem, temp;
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asm volatile ("loop_%=:\n"
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" lr %1,%0\n"
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" alr %1,%3\n"
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" cs %0,%1,%2\n"
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" jl loop_%=\n"
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: "+d" (prev), "+d" (temp), "=Q" (*mem)
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: "d" (val), "m" (*mem)
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: "cc", "memory");
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return prev;
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}
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APR_DECLARE(apr_uint32_t) apr_atomic_add32(volatile apr_uint32_t *mem, apr_uint32_t val)
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{
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return atomic_add(mem, val);
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}
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APR_DECLARE(apr_uint32_t) apr_atomic_inc32(volatile apr_uint32_t *mem)
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{
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return atomic_add(mem, 1);
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}
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static APR_INLINE apr_uint32_t atomic_sub(volatile apr_uint32_t *mem, apr_uint32_t val)
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{
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apr_uint32_t prev = *mem, temp;
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asm volatile ("loop_%=:\n"
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" lr %1,%0\n"
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" slr %1,%3\n"
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" cs %0,%1,%2\n"
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" jl loop_%=\n"
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: "+d" (prev), "+d" (temp), "=Q" (*mem)
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: "d" (val), "m" (*mem)
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: "cc", "memory");
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return temp;
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}
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APR_DECLARE(void) apr_atomic_sub32(volatile apr_uint32_t *mem, apr_uint32_t val)
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{
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atomic_sub(mem, val);
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}
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APR_DECLARE(int) apr_atomic_dec32(volatile apr_uint32_t *mem)
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{
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return atomic_sub(mem, 1);
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}
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APR_DECLARE(apr_uint32_t) apr_atomic_cas32(volatile apr_uint32_t *mem, apr_uint32_t with,
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apr_uint32_t cmp)
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{
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asm volatile (" cs %0,%2,%1\n"
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: "+d" (cmp), "=Q" (*mem)
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: "d" (with), "m" (*mem)
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: "cc", "memory");
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return cmp;
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}
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APR_DECLARE(apr_uint32_t) apr_atomic_xchg32(volatile apr_uint32_t *mem, apr_uint32_t val)
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{
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apr_uint32_t prev = *mem;
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asm volatile ("loop_%=:\n"
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" cs %0,%2,%1\n"
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" jl loop_%=\n"
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: "+d" (prev), "=Q" (*mem)
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: "d" (val), "m" (*mem)
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: "cc", "memory");
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return prev;
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}
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APR_DECLARE(void*) apr_atomic_casptr(volatile void **mem, void *with, const void *cmp)
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{
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void *prev = (void *) cmp;
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#if APR_SIZEOF_VOIDP == 4
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asm volatile (" cs %0,%2,%1\n"
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: "+d" (prev), "=Q" (*mem)
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: "d" (with), "m" (*mem)
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: "cc", "memory");
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#elif APR_SIZEOF_VOIDP == 8
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asm volatile (" csg %0,%2,%1\n"
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: "+d" (prev), "=Q" (*mem)
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: "d" (with), "m" (*mem)
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: "cc", "memory");
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#else
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#error APR_SIZEOF_VOIDP value not supported
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#endif
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return prev;
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}
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APR_DECLARE(void*) apr_atomic_xchgptr(volatile void **mem, void *with)
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{
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void *prev = (void *) *mem;
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#if APR_SIZEOF_VOIDP == 4
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asm volatile ("loop_%=:\n"
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" cs %0,%2,%1\n"
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" jl loop_%=\n"
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: "+d" (prev), "=Q" (*mem)
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: "d" (with), "m" (*mem)
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: "cc", "memory");
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#elif APR_SIZEOF_VOIDP == 8
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asm volatile ("loop_%=:\n"
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" csg %0,%2,%1\n"
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" jl loop_%=\n"
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: "+d" (prev), "=Q" (*mem)
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: "d" (with), "m" (*mem)
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: "cc", "memory");
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#else
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#error APR_SIZEOF_VOIDP value not supported
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#endif
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return prev;
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}
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#endif /* USE_ATOMICS_S390 */
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