0aadc82afb
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
|
|
* 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_S390
|
|
|
|
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;
|
|
}
|
|
|
|
static APR_INLINE apr_uint32_t atomic_add(volatile apr_uint32_t *mem, apr_uint32_t val)
|
|
{
|
|
apr_uint32_t prev = *mem, temp;
|
|
|
|
asm volatile ("loop_%=:\n"
|
|
" lr %1,%0\n"
|
|
" alr %1,%3\n"
|
|
" cs %0,%1,%2\n"
|
|
" jl loop_%=\n"
|
|
: "+d" (prev), "+d" (temp), "=Q" (*mem)
|
|
: "d" (val), "m" (*mem)
|
|
: "cc", "memory");
|
|
|
|
return prev;
|
|
}
|
|
|
|
APR_DECLARE(apr_uint32_t) apr_atomic_add32(volatile apr_uint32_t *mem, apr_uint32_t val)
|
|
{
|
|
return atomic_add(mem, val);
|
|
}
|
|
|
|
APR_DECLARE(apr_uint32_t) apr_atomic_inc32(volatile apr_uint32_t *mem)
|
|
{
|
|
return atomic_add(mem, 1);
|
|
}
|
|
|
|
static APR_INLINE apr_uint32_t atomic_sub(volatile apr_uint32_t *mem, apr_uint32_t val)
|
|
{
|
|
apr_uint32_t prev = *mem, temp;
|
|
|
|
asm volatile ("loop_%=:\n"
|
|
" lr %1,%0\n"
|
|
" slr %1,%3\n"
|
|
" cs %0,%1,%2\n"
|
|
" jl loop_%=\n"
|
|
: "+d" (prev), "+d" (temp), "=Q" (*mem)
|
|
: "d" (val), "m" (*mem)
|
|
: "cc", "memory");
|
|
|
|
return temp;
|
|
}
|
|
|
|
APR_DECLARE(void) apr_atomic_sub32(volatile apr_uint32_t *mem, apr_uint32_t val)
|
|
{
|
|
atomic_sub(mem, val);
|
|
}
|
|
|
|
APR_DECLARE(int) apr_atomic_dec32(volatile apr_uint32_t *mem)
|
|
{
|
|
return atomic_sub(mem, 1);
|
|
}
|
|
|
|
APR_DECLARE(apr_uint32_t) apr_atomic_cas32(volatile apr_uint32_t *mem, apr_uint32_t with,
|
|
apr_uint32_t cmp)
|
|
{
|
|
asm volatile (" cs %0,%2,%1\n"
|
|
: "+d" (cmp), "=Q" (*mem)
|
|
: "d" (with), "m" (*mem)
|
|
: "cc", "memory");
|
|
|
|
return cmp;
|
|
}
|
|
|
|
APR_DECLARE(apr_uint32_t) apr_atomic_xchg32(volatile apr_uint32_t *mem, apr_uint32_t val)
|
|
{
|
|
apr_uint32_t prev = *mem;
|
|
|
|
asm volatile ("loop_%=:\n"
|
|
" cs %0,%2,%1\n"
|
|
" jl loop_%=\n"
|
|
: "+d" (prev), "=Q" (*mem)
|
|
: "d" (val), "m" (*mem)
|
|
: "cc", "memory");
|
|
|
|
return prev;
|
|
}
|
|
|
|
APR_DECLARE(void*) apr_atomic_casptr(volatile void **mem, void *with, const void *cmp)
|
|
{
|
|
void *prev = (void *) cmp;
|
|
#if APR_SIZEOF_VOIDP == 4
|
|
asm volatile (" cs %0,%2,%1\n"
|
|
: "+d" (prev), "=Q" (*mem)
|
|
: "d" (with), "m" (*mem)
|
|
: "cc", "memory");
|
|
#elif APR_SIZEOF_VOIDP == 8
|
|
asm volatile (" csg %0,%2,%1\n"
|
|
: "+d" (prev), "=Q" (*mem)
|
|
: "d" (with), "m" (*mem)
|
|
: "cc", "memory");
|
|
#else
|
|
#error APR_SIZEOF_VOIDP value not supported
|
|
#endif
|
|
return prev;
|
|
}
|
|
|
|
APR_DECLARE(void*) apr_atomic_xchgptr(volatile void **mem, void *with)
|
|
{
|
|
void *prev = (void *) *mem;
|
|
#if APR_SIZEOF_VOIDP == 4
|
|
asm volatile ("loop_%=:\n"
|
|
" cs %0,%2,%1\n"
|
|
" jl loop_%=\n"
|
|
: "+d" (prev), "=Q" (*mem)
|
|
: "d" (with), "m" (*mem)
|
|
: "cc", "memory");
|
|
#elif APR_SIZEOF_VOIDP == 8
|
|
asm volatile ("loop_%=:\n"
|
|
" csg %0,%2,%1\n"
|
|
" jl loop_%=\n"
|
|
: "+d" (prev), "=Q" (*mem)
|
|
: "d" (with), "m" (*mem)
|
|
: "cc", "memory");
|
|
#else
|
|
#error APR_SIZEOF_VOIDP value not supported
|
|
#endif
|
|
return prev;
|
|
}
|
|
|
|
#endif /* USE_ATOMICS_S390 */
|