003 File Manager
Current Path:
/usr/src/contrib/apr/atomic/unix
usr
/
src
/
contrib
/
apr
/
atomic
/
unix
/
📁
..
📄
builtins.c
(2.3 KB)
📄
builtins64.c
(1.91 KB)
📄
ia32.c
(3.69 KB)
📄
mutex.c
(4.78 KB)
📄
mutex64.c
(4.3 KB)
📄
ppc.c
(8.53 KB)
📄
s390.c
(4.52 KB)
📄
solaris.c
(2.29 KB)
Editing: ia32.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_IA32 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; } APR_DECLARE(apr_uint32_t) apr_atomic_add32(volatile apr_uint32_t *mem, apr_uint32_t val) { asm volatile ("lock; xaddl %0,%1" : "=r" (val), "=m" (*mem) : "0" (val), "m" (*mem) : "memory", "cc"); return val; } APR_DECLARE(void) apr_atomic_sub32(volatile apr_uint32_t *mem, apr_uint32_t val) { asm volatile ("lock; subl %1, %0" : /* no output */ : "m" (*(mem)), "r" (val) : "memory", "cc"); } APR_DECLARE(apr_uint32_t) apr_atomic_inc32(volatile apr_uint32_t *mem) { return apr_atomic_add32(mem, 1); } APR_DECLARE(int) apr_atomic_dec32(volatile apr_uint32_t *mem) { unsigned char prev; asm volatile ("lock; decl %0; setnz %1" : "=m" (*mem), "=qm" (prev) : "m" (*mem) : "memory"); return prev; } APR_DECLARE(apr_uint32_t) apr_atomic_cas32(volatile apr_uint32_t *mem, apr_uint32_t with, apr_uint32_t cmp) { apr_uint32_t prev; asm volatile ("lock; cmpxchgl %1, %2" : "=a" (prev) : "r" (with), "m" (*(mem)), "0"(cmp) : "memory", "cc"); return prev; } APR_DECLARE(apr_uint32_t) apr_atomic_xchg32(volatile apr_uint32_t *mem, apr_uint32_t val) { apr_uint32_t prev = val; asm volatile ("xchgl %0, %1" : "=r" (prev), "+m" (*mem) : "0" (prev)); return prev; } APR_DECLARE(void*) apr_atomic_casptr(volatile void **mem, void *with, const void *cmp) { void *prev; #if APR_SIZEOF_VOIDP == 4 asm volatile ("lock; cmpxchgl %2, %1" : "=a" (prev), "=m" (*mem) : "r" (with), "m" (*mem), "0" (cmp)); #elif APR_SIZEOF_VOIDP == 8 asm volatile ("lock; cmpxchgq %q2, %1" : "=a" (prev), "=m" (*mem) : "r" ((unsigned long)with), "m" (*mem), "0" ((unsigned long)cmp)); #else #error APR_SIZEOF_VOIDP value not supported #endif return prev; } APR_DECLARE(void*) apr_atomic_xchgptr(volatile void **mem, void *with) { void *prev; #if APR_SIZEOF_VOIDP == 4 asm volatile ("xchgl %2, %1" : "=a" (prev), "+m" (*mem) : "0" (with)); #elif APR_SIZEOF_VOIDP == 8 asm volatile ("xchgq %q2, %1" : "=a" (prev), "+m" (*mem) : "0" (with)); #else #error APR_SIZEOF_VOIDP value not supported #endif return prev; } #endif /* USE_ATOMICS_IA32 */
Upload File
Create Folder