937a200089
This is actually a fully functional build except: * All internal shared libraries are static linked to make sure there is no interference with ports (and to reduce build time). * It does not have the python/perl/etc plugin or API support. * By default, it installs as "svnlite" rather than "svn". * If WITH_SVN added in make.conf, you get "svn". * If WITHOUT_SVNLITE is in make.conf, this is completely disabled. To be absolutely clear, this is not intended for any use other than checking out freebsd source and committing, like we once did with cvs. It should be usable for small scale local repositories that don't need the python/perl plugin architecture.
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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