From 770e5d4b00581f408fa9cd9bb62859b8158f2954 Mon Sep 17 00:00:00 2001 From: davi Date: Sat, 7 Jul 2007 00:11:50 +0000 Subject: New apr_atomic implementation for S/390 native atomic operations. Tested on: RHEL AS 4 (Nahant Update 4), IBM/S390, running under VM (64 bit mode), gcc 3.4.6 git-svn-id: http://svn.apache.org/repos/asf/apr/apr/trunk@554095 13f79535-47bb-0310-9956-ffa450edef68 --- atomic/unix/s390.c | 132 ++++++++++++++++++++++++++++++++++++ include/arch/unix/apr_arch_atomic.h | 2 + 2 files changed, 134 insertions(+) create mode 100644 atomic/unix/s390.c diff --git a/atomic/unix/s390.c b/atomic/unix/s390.c new file mode 100644 index 000000000..a81ffdd16 --- /dev/null +++ b/atomic/unix/s390.c @@ -0,0 +1,132 @@ +/* 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; +} + +#endif /* USE_ATOMICS_S390 */ diff --git a/include/arch/unix/apr_arch_atomic.h b/include/arch/unix/apr_arch_atomic.h index 6b020c898..0f533fac4 100644 --- a/include/arch/unix/apr_arch_atomic.h +++ b/include/arch/unix/apr_arch_atomic.h @@ -36,6 +36,8 @@ # define USE_ATOMICS_SOLARIS #elif defined(__GNUC__) && (defined(__PPC__) || defined(__ppc__)) # define USE_ATOMICS_PPC +#elif defined(__GNUC__) && (defined(__s390__) || defined(__s390x__)) +# define USE_ATOMICS_S390 #else # define USE_ATOMICS_GENERIC #endif -- cgit v1.2.1