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/*
* Copyright (c) 2013-2015 CohortFS, LLC.
* Copyright (c) 2013-2018 Red Hat, Inc. and/or its affiliates.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR `AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/**
* @file work_pool.h
* @author William Allen Simpson <bill@cohortfs.com>
* @brief Pthreads-based work queue package
*
* @section DESCRIPTION
*
* This provides simple work queues using pthreads and TAILQ primitives.
*
* @note Loosely based upon previous thrdpool by
* Matt Benjamin <matt@cohortfs.com>
*/
#ifndef WORK_POOL_H
#define WORK_POOL_H
#include <rpc/pool_queue.h>
struct work_pool_params {
int32_t thrd_max;
int32_t thrd_min;
};
struct work_pool_thread;
struct work_pool {
struct poolq_head pqh;
TAILQ_HEAD(work_pool_s, work_pool_thread) wptqh;
char *name;
pthread_attr_t attr;
struct work_pool_params params;
long timeout_ms;
uint32_t n_threads;
uint32_t worker_index;
};
struct work_pool_entry;
struct work_pool_thread {
struct poolq_entry pqe; /*** 1st ***/
TAILQ_ENTRY(work_pool_thread) wptq;
pthread_cond_t pqcond;
struct work_pool *pool;
struct work_pool_entry *work;
char worker_name[16];
pthread_t pt;
uint32_t worker_index;
bool wakeup;
};
typedef void (*work_pool_fun_t) (struct work_pool_entry *);
struct work_pool_entry {
struct poolq_entry pqe; /*** 1st ***/
struct work_pool_thread *wpt;
work_pool_fun_t fun;
void *arg;
};
int work_pool_init(struct work_pool *, const char *, struct work_pool_params *);
int work_pool_submit(struct work_pool *, struct work_pool_entry *);
int work_pool_shutdown(struct work_pool *);
#endif /* WORK_POOL_H */
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