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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2008 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#ifndef _THREAD_POOL_IMPL_H
#define _THREAD_POOL_IMPL_H
#include <thread_pool.h>
#ifdef __cplusplus
extern "C" {
#endif
/*
* Thread pool implementation definitions.
* See <thread_pool.h> for interface declarations.
*/
/*
* FIFO queued job
*/
typedef struct tpool_job tpool_job_t;
struct tpool_job {
tpool_job_t *tpj_next; /* list of jobs */
void (*tpj_func)(void *); /* function to call */
void *tpj_arg; /* its argument */
};
/*
* List of active threads, linked through their stacks.
*/
typedef struct tpool_active tpool_active_t;
struct tpool_active {
tpool_active_t *tpa_next; /* list of active threads */
pthread_t tpa_tid; /* active thread id */
};
/*
* The thread pool.
*/
struct tpool {
tpool_t *tp_forw; /* circular list of all thread pools */
tpool_t *tp_back;
pthread_mutex_t tp_mutex; /* protects the pool data */
pthread_cond_t tp_busycv; /* synchronization in tpool_dispatch */
pthread_cond_t tp_workcv; /* synchronization with workers */
pthread_cond_t tp_waitcv; /* synchronization in tpool_wait() */
tpool_active_t *tp_active; /* threads performing work */
tpool_job_t *tp_head; /* FIFO job queue */
tpool_job_t *tp_tail;
pthread_attr_t tp_attr; /* attributes of the workers */
int tp_flags; /* see below */
uint_t tp_linger; /* seconds before idle workers exit */
int tp_njobs; /* number of jobs in job queue */
int tp_minimum; /* minimum number of worker threads */
int tp_maximum; /* maximum number of worker threads */
int tp_current; /* current number of worker threads */
int tp_idle; /* number of idle workers */
};
/* tp_flags */
#define TP_WAIT 0x01 /* waiting in tpool_wait() */
#define TP_SUSPEND 0x02 /* pool is being suspended */
#define TP_DESTROY 0x04 /* pool is being destroyed */
#define TP_ABANDON 0x08 /* pool is abandoned (auto-destroy) */
#ifdef __cplusplus
}
#endif
#endif /* _THREAD_POOL_IMPL_H */
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