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Name	Size	Permission
apr-x86_64.h	17.89 KB	-rw-r--r--
apr.h	636 B	-rw-r--r--
apr_allocator.h	6.07 KB	-rw-r--r--
apr_anylock.h	4.93 KB	-rw-r--r--
apr_atomic.h	6.04 KB	-rw-r--r--
apr_base64.h	3.75 KB	-rw-r--r--
apr_buckets.h	63.15 KB	-rw-r--r--
apr_crypto.h	19.68 KB	-rw-r--r--
apr_cstr.h	11.13 KB	-rw-r--r--
apr_date.h	3.47 KB	-rw-r--r--
apr_dbd.h	23.35 KB	-rw-r--r--
apr_dbm.h	8.4 KB	-rw-r--r--
apr_dso.h	2.64 KB	-rw-r--r--
apr_encode.h	30.35 KB	-rw-r--r--
apr_env.h	2.06 KB	-rw-r--r--
apr_errno.h	53.77 KB	-rw-r--r--
apr_escape.h	17.23 KB	-rw-r--r--
apr_file_info.h	17.17 KB	-rw-r--r--
apr_file_io.h	42.88 KB	-rw-r--r--
apr_fnmatch.h	6.08 KB	-rw-r--r--
apr_general.h	7.34 KB	-rw-r--r--
apr_getopt.h	5.84 KB	-rw-r--r--
apr_global_mutex.h	7.19 KB	-rw-r--r--
apr_hash.h	10.08 KB	-rw-r--r--
apr_hooks.h	12.36 KB	-rw-r--r--
apr_inherit.h	2.09 KB	-rw-r--r--
apr_ldap.h	5.57 KB	-rw-r--r--
apr_ldap_init.h	5.64 KB	-rw-r--r--
apr_ldap_option.h	8.4 KB	-rw-r--r--
apr_ldap_rebind.h	3.09 KB	-rw-r--r--
apr_ldap_url.h	3.71 KB	-rw-r--r--
apr_lib.h	8.23 KB	-rw-r--r--
apr_md4.h	4.42 KB	-rw-r--r--
apr_md5.h	6.2 KB	-rw-r--r--
apr_memcache.h	16.82 KB	-rw-r--r--
apr_mmap.h	5.01 KB	-rw-r--r--
apr_network_io.h	36.02 KB	-rw-r--r--
apr_optional.h	2.71 KB	-rw-r--r--
apr_optional_hooks.h	3.78 KB	-rw-r--r--
apr_perms_set.h	1.86 KB	-rw-r--r--
apr_poll.h	20.6 KB	-rw-r--r--
apr_pools.h	30.94 KB	-rw-r--r--
apr_portable.h	20.02 KB	-rw-r--r--
apr_proc_mutex.h	6.85 KB	-rw-r--r--
apr_queue.h	3.98 KB	-rw-r--r--
apr_random.h	4.92 KB	-rw-r--r--
apr_redis.h	15.62 KB	-rw-r--r--
apr_reslist.h	7.01 KB	-rw-r--r--
apr_ring.h	18.78 KB	-rw-r--r--
apr_rmm.h	4.67 KB	-rw-r--r--
apr_sdbm.h	5.97 KB	-rw-r--r--
apr_sha1.h	3.79 KB	-rw-r--r--
apr_shm.h	9.26 KB	-rw-r--r--
apr_signal.h	2.7 KB	-rw-r--r--
apr_siphash.h	6.01 KB	-rw-r--r--
apr_skiplist.h	14.19 KB	-rw-r--r--
apr_strings.h	14.55 KB	-rw-r--r--
apr_strmatch.h	2.61 KB	-rw-r--r--
apr_support.h	1.6 KB	-rw-r--r--
apr_tables.h	18.9 KB	-rw-r--r--
apr_thread_cond.h	5.4 KB	-rw-r--r--
apr_thread_mutex.h	4.39 KB	-rw-r--r--
apr_thread_pool.h	10.84 KB	-rw-r--r--
apr_thread_proc.h	36.8 KB	-rw-r--r--
apr_thread_rwlock.h	4.65 KB	-rw-r--r--
apr_time.h	7.39 KB	-rw-r--r--
apr_uri.h	6.43 KB	-rw-r--r--
apr_user.h	5.19 KB	-rw-r--r--
apr_uuid.h	2.05 KB	-rw-r--r--
apr_version.h	5.22 KB	-rw-r--r--
apr_want.h	2.89 KB	-rw-r--r--
apr_xlate.h	6.26 KB	-rw-r--r--
apr_xml.h	12.19 KB	-rw-r--r--
apu.h	4.22 KB	-rw-r--r--
apu_errno.h	5.32 KB	-rw-r--r--
apu_version.h	4.2 KB	-rw-r--r--
apu_want.h	1.45 KB	-rw-r--r--

Code Editor : apr_atomic.h

/* 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.
 */

#ifndef APR_ATOMIC_H
#define APR_ATOMIC_H

/**
 * @file apr_atomic.h
 * @brief APR Atomic Operations
 */

#include "apr.h"
#include "apr_pools.h"

#ifdef __cplusplus
extern "C" {
#endif

/**
 * @defgroup apr_atomic Atomic Operations
 * @ingroup APR 
 * @{
 */

/**
 * this function is required on some platforms to initialize the
 * atomic operation's internal structures
 * @param p pool
 * @return APR_SUCCESS on successful completion
 * @remark Programs do NOT need to call this directly. APR will call this
 *         automatically from apr_initialize().
 * @internal
 */
APR_DECLARE(apr_status_t) apr_atomic_init(apr_pool_t *p);

/*
 * Atomic operations on 32-bit values
 * Note: Each of these functions internally implements a memory barrier
 * on platforms that require it
 */

/**
 * atomically read an apr_uint32_t from memory
 * @param mem the pointer
 */
APR_DECLARE(apr_uint32_t) apr_atomic_read32(volatile apr_uint32_t *mem);

/**
 * atomically set an apr_uint32_t in memory
 * @param mem pointer to the object
 * @param val value that the object will assume
 */
APR_DECLARE(void) apr_atomic_set32(volatile apr_uint32_t *mem, apr_uint32_t val);

/**
 * atomically add 'val' to an apr_uint32_t
 * @param mem pointer to the object
 * @param val amount to add
 * @return old value pointed to by mem
 */
APR_DECLARE(apr_uint32_t) apr_atomic_add32(volatile apr_uint32_t *mem, apr_uint32_t val);

/**
 * atomically subtract 'val' from an apr_uint32_t
 * @param mem pointer to the object
 * @param val amount to subtract
 */
APR_DECLARE(void) apr_atomic_sub32(volatile apr_uint32_t *mem, apr_uint32_t val);

/**
 * atomically increment an apr_uint32_t by 1
 * @param mem pointer to the object
 * @return old value pointed to by mem
 */
APR_DECLARE(apr_uint32_t) apr_atomic_inc32(volatile apr_uint32_t *mem);

/**
 * atomically decrement an apr_uint32_t by 1
 * @param mem pointer to the atomic value
 * @return zero if the value becomes zero on decrement, otherwise non-zero
 */
APR_DECLARE(int) apr_atomic_dec32(volatile apr_uint32_t *mem);

/**
 * compare an apr_uint32_t's value with 'cmp'.
 * If they are the same swap the value with 'with'
 * @param mem pointer to the value
 * @param with what to swap it with
 * @param cmp the value to compare it to
 * @return the old value of *mem
 */
APR_DECLARE(apr_uint32_t) apr_atomic_cas32(volatile apr_uint32_t *mem, apr_uint32_t with,
                              apr_uint32_t cmp);

/**
 * exchange an apr_uint32_t's value with 'val'.
 * @param mem pointer to the value
 * @param val what to swap it with
 * @return the old value of *mem
 */
APR_DECLARE(apr_uint32_t) apr_atomic_xchg32(volatile apr_uint32_t *mem, apr_uint32_t val);

/*
 * Atomic operations on 64-bit values
 * Note: Each of these functions internally implements a memory barrier
 * on platforms that require it
 */

/**
 * atomically read an apr_uint64_t from memory
 * @param mem the pointer
 */
APR_DECLARE(apr_uint64_t) apr_atomic_read64(volatile apr_uint64_t *mem);

/**
 * atomically set an apr_uint64_t in memory
 * @param mem pointer to the object
 * @param val value that the object will assume
 */
APR_DECLARE(void) apr_atomic_set64(volatile apr_uint64_t *mem, apr_uint64_t val);

/**
 * atomically add 'val' to an apr_uint64_t
 * @param mem pointer to the object
 * @param val amount to add
 * @return old value pointed to by mem
 */
APR_DECLARE(apr_uint64_t) apr_atomic_add64(volatile apr_uint64_t *mem, apr_uint64_t val);

/**
 * atomically subtract 'val' from an apr_uint64_t
 * @param mem pointer to the object
 * @param val amount to subtract
 */
APR_DECLARE(void) apr_atomic_sub64(volatile apr_uint64_t *mem, apr_uint64_t val);

/**
 * atomically increment an apr_uint64_t by 1
 * @param mem pointer to the object
 * @return old value pointed to by mem
 */
APR_DECLARE(apr_uint64_t) apr_atomic_inc64(volatile apr_uint64_t *mem);

/**
 * atomically decrement an apr_uint64_t by 1
 * @param mem pointer to the atomic value
 * @return zero if the value becomes zero on decrement, otherwise non-zero
 */
APR_DECLARE(int) apr_atomic_dec64(volatile apr_uint64_t *mem);

/**
 * compare an apr_uint64_t's value with 'cmp'.
 * If they are the same swap the value with 'with'
 * @param mem pointer to the value
 * @param with what to swap it with
 * @param cmp the value to compare it to
 * @return the old value of *mem
 */
APR_DECLARE(apr_uint64_t) apr_atomic_cas64(volatile apr_uint64_t *mem, apr_uint64_t with,
                              apr_uint64_t cmp);

/**
 * exchange an apr_uint64_t's value with 'val'.
 * @param mem pointer to the value
 * @param val what to swap it with
 * @return the old value of *mem
 */
APR_DECLARE(apr_uint64_t) apr_atomic_xchg64(volatile apr_uint64_t *mem, apr_uint64_t val);

/**
 * compare the pointer's value with cmp.
 * If they are the same swap the value with 'with'
 * @param mem pointer to the pointer
 * @param with what to swap it with
 * @param cmp the value to compare it to
 * @return the old value of the pointer
 */
APR_DECLARE(void*) apr_atomic_casptr(volatile void **mem, void *with, const void *cmp);

/**
 * exchange a pair of pointer values
 * @param mem pointer to the pointer
 * @param with what to swap it with
 * @return the old value of the pointer
 */
APR_DECLARE(void*) apr_atomic_xchgptr(volatile void **mem, void *with);

/** @} */

#ifdef __cplusplus
}
#endif

#endif	/* !APR_ATOMIC_H */

${this.title}

Code Editor : apr_atomic.h