1/* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 22/* 23 * Copyright 2008 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27#ifndef _THREAD_POOL_IMPL_H 28#define _THREAD_POOL_IMPL_H 29 30#include <thread_pool.h> 31 32#ifdef __cplusplus 33extern "C" { 34#endif 35 36/* 37 * Thread pool implementation definitions. 38 * See <thread_pool.h> for interface declarations. 39 */ 40 41/* 42 * FIFO queued job 43 */ 44typedef struct tpool_job tpool_job_t; 45struct tpool_job { 46 tpool_job_t *tpj_next; /* list of jobs */ 47 void (*tpj_func)(void *); /* function to call */ 48 void *tpj_arg; /* its argument */ 49}; 50 51/* 52 * List of active threads, linked through their stacks. 53 */ 54typedef struct tpool_active tpool_active_t; 55struct tpool_active { 56 tpool_active_t *tpa_next; /* list of active threads */ 57 pthread_t tpa_tid; /* active thread id */ 58}; 59 60/* 61 * The thread pool. 62 */ 63struct tpool { 64 tpool_t *tp_forw; /* circular list of all thread pools */ 65 tpool_t *tp_back; 66 pthread_mutex_t tp_mutex; /* protects the pool data */ 67 pthread_cond_t tp_busycv; /* synchronization in tpool_dispatch */ 68 pthread_cond_t tp_workcv; /* synchronization with workers */ 69 pthread_cond_t tp_waitcv; /* synchronization in tpool_wait() */ 70 tpool_active_t *tp_active; /* threads performing work */ 71 tpool_job_t *tp_head; /* FIFO job queue */ 72 tpool_job_t *tp_tail; 73 pthread_attr_t tp_attr; /* attributes of the workers */ 74 int tp_flags; /* see below */ 75 uint_t tp_linger; /* seconds before idle workers exit */ 76 int tp_njobs; /* number of jobs in job queue */ 77 int tp_minimum; /* minimum number of worker threads */ 78 int tp_maximum; /* maximum number of worker threads */ 79 int tp_current; /* current number of worker threads */ 80 int tp_idle; /* number of idle workers */ 81}; 82 83/* tp_flags */ 84#define TP_WAIT 0x01 /* waiting in tpool_wait() */ 85#define TP_SUSPEND 0x02 /* pool is being suspended */ 86#define TP_DESTROY 0x04 /* pool is being destroyed */ 87#define TP_ABANDON 0x08 /* pool is abandoned (auto-destroy) */ 88 89#ifdef __cplusplus 90} 91#endif 92 93#endif /* _THREAD_POOL_IMPL_H */ 94