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 #pragma ident "%Z%%M% %I% %E% SMI" 31 32 #include <thread_pool.h> 33 34 #ifdef __cplusplus 35 extern "C" { 36 #endif 37 38 /* 39 * Thread pool implementation definitions. 40 * See <thread_pool.h> for interface declarations. 41 */ 42 43 /* 44 * FIFO queued job 45 */ 46 typedef struct tpool_job tpool_job_t; 47 struct tpool_job { 48 tpool_job_t *tpj_next; /* list of jobs */ 49 void (*tpj_func)(void *); /* function to call */ 50 void *tpj_arg; /* its argument */ 51 }; 52 53 /* 54 * List of active threads, linked through their stacks. 55 */ 56 typedef struct tpool_active tpool_active_t; 57 struct tpool_active { 58 tpool_active_t *tpa_next; /* list of active threads */ 59 pthread_t tpa_tid; /* active thread id */ 60 }; 61 62 /* 63 * The thread pool. 64 */ 65 struct tpool { 66 tpool_t *tp_forw; /* circular list of all thread pools */ 67 tpool_t *tp_back; 68 mutex_t tp_mutex; /* protects the pool data */ 69 cond_t tp_busycv; /* synchronization in tpool_dispatch */ 70 cond_t tp_workcv; /* synchronization with workers */ 71 cond_t tp_waitcv; /* synchronization in tpool_wait() */ 72 tpool_active_t *tp_active; /* threads performing work */ 73 tpool_job_t *tp_head; /* FIFO job queue */ 74 tpool_job_t *tp_tail; 75 pthread_attr_t tp_attr; /* attributes of the workers */ 76 int tp_flags; /* see below */ 77 uint_t tp_linger; /* seconds before idle workers exit */ 78 int tp_njobs; /* number of jobs in job queue */ 79 int tp_minimum; /* minimum number of worker threads */ 80 int tp_maximum; /* maximum number of worker threads */ 81 int tp_current; /* current number of worker threads */ 82 int tp_idle; /* number of idle workers */ 83 }; 84 85 /* tp_flags */ 86 #define TP_WAIT 0x01 /* waiting in tpool_wait() */ 87 #define TP_SUSPEND 0x02 /* pool is being suspended */ 88 #define TP_DESTROY 0x04 /* pool is being destroyed */ 89 #define TP_ABANDON 0x08 /* pool is abandoned (auto-destroy) */ 90 91 extern int pthread_attr_clone(pthread_attr_t *, const pthread_attr_t *); 92 93 extern const sigset_t maskset; /* set of all maskable signals */ 94 95 #ifdef __cplusplus 96 } 97 #endif 98 99 #endif /* _THREAD_POOL_IMPL_H */ 100