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 * Copyright 2006 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 26 #pragma ident "%Z%%M% %I% %E% SMI" 27 28 /* 29 * routines to wait and wake up a client waiting on a list for a 30 * name service request 31 */ 32 #include "cache.h" 33 34 int 35 nscd_wait(waiter_t *wchan, mutex_t *lock, uint8_t *key) 36 { 37 waiter_t mywait; 38 (void) cond_init(&(mywait.w_waitcv), USYNC_THREAD, 0); 39 mywait.w_key = key; 40 mywait.w_next = wchan->w_next; 41 mywait.w_prev = wchan; 42 if (mywait.w_next) 43 mywait.w_next->w_prev = &mywait; 44 wchan->w_next = &mywait; 45 46 while (*key & ST_PENDING) 47 (void) cond_wait(&(mywait.w_waitcv), lock); 48 if (mywait.w_prev) 49 mywait.w_prev->w_next = mywait.w_next; 50 if (mywait.w_next) 51 mywait.w_next->w_prev = mywait.w_prev; 52 return (0); 53 } 54 55 int 56 nscd_signal(waiter_t *wchan, uint8_t *key) 57 { 58 int c = 0; 59 waiter_t *tmp = wchan->w_next; 60 61 while (tmp) { 62 if (tmp->w_key == key) { 63 (void) cond_signal(&(tmp->w_waitcv)); 64 c++; 65 } 66 tmp = tmp->w_next; 67 } 68 69 return (c); 70 } 71