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Diffstat (limited to '')
| -rw-r--r-- | atomic/unix/s390.c | 159 |
1 files changed, 159 insertions, 0 deletions
diff --git a/atomic/unix/s390.c b/atomic/unix/s390.c new file mode 100644 index 0000000..ae5d040 --- /dev/null +++ b/atomic/unix/s390.c @@ -0,0 +1,159 @@ +/* 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) +{ +#if defined (NEED_ATOMICS_GENERIC64) + return apr__atomic_generic64_init(p); +#else + return APR_SUCCESS; +#endif +} + +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 */ |