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📁 ..
📄 apr-x86_64.h(17.91 KB)
📄 apr.h(636 B)
📄 apr_allocator.h(6.07 KB)
📄 apr_anylock.h(4.93 KB)
📄 apr_atomic.h(6.04 KB)
📄 apr_base64.h(3.75 KB)
📄 apr_buckets.h(63.15 KB)
📄 apr_crypto.h(19.68 KB)
📄 apr_cstr.h(11.13 KB)
📄 apr_date.h(3.47 KB)
📄 apr_dbd.h(23.35 KB)
📄 apr_dbm.h(8.4 KB)
📄 apr_dso.h(2.64 KB)
📄 apr_encode.h(30.35 KB)
📄 apr_env.h(2.06 KB)
📄 apr_errno.h(53.77 KB)
📄 apr_escape.h(17.23 KB)
📄 apr_file_info.h(17.17 KB)
📄 apr_file_io.h(42.88 KB)
📄 apr_fnmatch.h(6.08 KB)
📄 apr_general.h(7.34 KB)
📄 apr_getopt.h(5.84 KB)
📄 apr_global_mutex.h(7.19 KB)
📄 apr_hash.h(10.08 KB)
📄 apr_hooks.h(12.36 KB)
📄 apr_inherit.h(2.09 KB)
📄 apr_ldap.h(5.57 KB)
📄 apr_ldap_init.h(5.64 KB)
📄 apr_ldap_option.h(8.4 KB)
📄 apr_ldap_rebind.h(3.09 KB)
📄 apr_ldap_url.h(3.71 KB)
📄 apr_lib.h(8.23 KB)
📄 apr_md4.h(4.42 KB)
📄 apr_md5.h(6.2 KB)
📄 apr_memcache.h(16.82 KB)
📄 apr_mmap.h(5.01 KB)
📄 apr_network_io.h(36.02 KB)
📄 apr_optional.h(2.71 KB)
📄 apr_optional_hooks.h(3.78 KB)
📄 apr_perms_set.h(1.86 KB)
📄 apr_poll.h(20.6 KB)
📄 apr_pools.h(30.94 KB)
📄 apr_portable.h(20.02 KB)
📄 apr_proc_mutex.h(6.85 KB)
📄 apr_queue.h(3.98 KB)
📄 apr_random.h(4.92 KB)
📄 apr_redis.h(15.62 KB)
📄 apr_reslist.h(7.01 KB)
📄 apr_ring.h(18.78 KB)
📄 apr_rmm.h(4.67 KB)
📄 apr_sdbm.h(5.97 KB)
📄 apr_sha1.h(3.79 KB)
📄 apr_shm.h(9.26 KB)
📄 apr_signal.h(2.7 KB)
📄 apr_siphash.h(6.01 KB)
📄 apr_skiplist.h(14.19 KB)
📄 apr_strings.h(14.55 KB)
📄 apr_strmatch.h(2.61 KB)
📄 apr_support.h(1.6 KB)
📄 apr_tables.h(18.9 KB)
📄 apr_thread_cond.h(5.4 KB)
📄 apr_thread_mutex.h(4.39 KB)
📄 apr_thread_pool.h(10.84 KB)
📄 apr_thread_proc.h(36.8 KB)
📄 apr_thread_rwlock.h(4.65 KB)
📄 apr_time.h(7.39 KB)
📄 apr_uri.h(6.43 KB)
📄 apr_user.h(5.19 KB)
📄 apr_uuid.h(2.05 KB)
📄 apr_version.h(5.22 KB)
📄 apr_want.h(2.89 KB)
📄 apr_xlate.h(6.26 KB)
📄 apr_xml.h(12.19 KB)
📄 apu.h(4.22 KB)
📄 apu_errno.h(5.32 KB)
📄 apu_version.h(4.2 KB)
📄 apu_want.h(1.45 KB)

Editing: apr_thread_cond.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_THREAD_COND_H
#define APR_THREAD_COND_H

/**
 * @file apr_thread_cond.h
 * @brief APR Condition Variable Routines
 */

#include "apr.h"
#include "apr_pools.h"
#include "apr_errno.h"
#include "apr_time.h"
#include "apr_thread_mutex.h"

#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */

#if APR_HAS_THREADS || defined(DOXYGEN)

/**
 * @defgroup apr_thread_cond Condition Variable Routines
 * @ingroup APR 
 * @{
 */

/** Opaque structure for thread condition variables */
typedef struct apr_thread_cond_t apr_thread_cond_t;

/**
 * Note: destroying a condition variable (or likewise, destroying or
 * clearing the pool from which a condition variable was allocated) if
 * any threads are blocked waiting on it gives undefined results.
 */

/**
 * Create and initialize a condition variable that can be used to signal
 * and schedule threads in a single process.
 * @param cond the memory address where the newly created condition variable
 *        will be stored.
 * @param pool the pool from which to allocate the condition.
 */
APR_DECLARE(apr_status_t) apr_thread_cond_create(apr_thread_cond_t **cond,
                                                 apr_pool_t *pool);

/**
 * Put the active calling thread to sleep until signaled to wake up. Each
 * condition variable must be associated with a mutex, and that mutex must
 * be locked before  calling this function, or the behavior will be
 * undefined. As the calling thread is put to sleep, the given mutex
 * will be simultaneously released; and as this thread wakes up the lock
 * is again simultaneously acquired.
 * @param cond the condition variable on which to block.
 * @param mutex the mutex that must be locked upon entering this function,
 *        is released while the thread is asleep, and is again acquired before
 *        returning from this function.
 * @remark Spurious wakeups may occur. Before and after every call to wait on
 * a condition variable, the caller should test whether the condition is already
 * met.
 */
APR_DECLARE(apr_status_t) apr_thread_cond_wait(apr_thread_cond_t *cond,
                                               apr_thread_mutex_t *mutex);

/**
 * Put the active calling thread to sleep until signaled to wake up or
 * the timeout is reached. Each condition variable must be associated
 * with a mutex, and that mutex must be locked before calling this
 * function, or the behavior will be undefined. As the calling thread
 * is put to sleep, the given mutex will be simultaneously released;
 * and as this thread wakes up the lock is again simultaneously acquired.
 * @param cond the condition variable on which to block.
 * @param mutex the mutex that must be locked upon entering this function,
 *        is released while the thread is asleep, and is again acquired before
 *        returning from this function.
 * @param timeout The amount of time in microseconds to wait. This is 
 *        a maximum, not a minimum. If the condition is signaled, we 
 *        will wake up before this time, otherwise the error APR_TIMEUP
 *        is returned.
 */
APR_DECLARE(apr_status_t) apr_thread_cond_timedwait(apr_thread_cond_t *cond,
                                                    apr_thread_mutex_t *mutex,
                                                    apr_interval_time_t timeout);

/**
 * Signals a single thread, if one exists, that is blocking on the given
 * condition variable. That thread is then scheduled to wake up and acquire
 * the associated mutex. Although it is not required, if predictable scheduling
 * is desired, that mutex must be locked while calling this function.
 * @param cond the condition variable on which to produce the signal.
 * @remark If no threads are waiting on the condition variable, nothing happens.
 */
APR_DECLARE(apr_status_t) apr_thread_cond_signal(apr_thread_cond_t *cond);

/**
 * Signals all threads blocking on the given condition variable.
 * Each thread that was signaled is then scheduled to wake up and acquire
 * the associated mutex. This will happen in a serialized manner.
 * @param cond the condition variable on which to produce the broadcast.
 * @remark If no threads are waiting on the condition variable, nothing happens.
 */
APR_DECLARE(apr_status_t) apr_thread_cond_broadcast(apr_thread_cond_t *cond);

/**
 * Destroy the condition variable and free the associated memory.
 * @param cond the condition variable to destroy.
 */
APR_DECLARE(apr_status_t) apr_thread_cond_destroy(apr_thread_cond_t *cond);

/**
 * Get the pool used by this thread_cond.
 * @return apr_pool_t the pool
 */
APR_POOL_DECLARE_ACCESSOR(thread_cond);

#endif /* APR_HAS_THREADS */

/** @} */

#ifdef __cplusplus
}
#endif

#endif  /* ! APR_THREAD_COND_H */

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