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, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* 23 * Copyright 2004 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 #pragma ident "%Z%%M% %I% %E% SMI" 28 29 #include "synonyms.h" 30 #include <stdlib.h> 31 #include <errno.h> 32 #include "mtlib.h" 33 #include "libc.h" 34 #include "tsd.h" 35 36 typedef void (*pfrv_t)(void *); 37 38 typedef struct { 39 void *buf; 40 size_t size; 41 pfrv_t destructor; 42 } tsdent_t; 43 44 static void 45 _free_tsdbuf(void *ptr) 46 { 47 tsdent_t *loc = ptr; 48 pfrv_t destructor; 49 void *p; 50 int i; 51 52 if (loc != NULL) { 53 for (i = 0; i < _T_NUM_ENTRIES; i++) { 54 if ((p = loc[i].buf) != NULL) { 55 destructor = loc[i].destructor; 56 if (destructor != NULL) 57 destructor(p); 58 lfree(p, loc[i].size); 59 } 60 } 61 lfree(loc, _T_NUM_ENTRIES * sizeof (tsdent_t)); 62 } 63 } 64 65 void * 66 tsdalloc(__tsd_item_t n, size_t size, pfrv_t destructor) 67 { 68 static int once_key = 0; 69 static mutex_t key_lock = DEFAULTMUTEX; 70 static thread_key_t key; 71 tsdent_t *loc; 72 void *p; 73 int error; 74 75 if ((uint_t)n >= _T_NUM_ENTRIES) { 76 errno = ENOTSUP; 77 return (NULL); 78 } 79 80 if (once_key == 0) { 81 lmutex_lock(&key_lock); 82 if (once_key == 0) { 83 if ((error = _thr_keycreate(&key, _free_tsdbuf)) != 0) { 84 lmutex_unlock(&key_lock); 85 errno = error; 86 return (NULL); 87 } 88 once_key = 1; 89 } 90 lmutex_unlock(&key_lock); 91 } 92 93 if ((loc = _pthread_getspecific(key)) != NULL) { 94 if ((p = loc[n].buf) != NULL) 95 return (p); 96 } else { 97 /* allocate our array of pointers */ 98 loc = lmalloc(_T_NUM_ENTRIES * sizeof (tsdent_t)); 99 if (loc == NULL) 100 return (NULL); 101 if ((error = _thr_setspecific(key, loc)) != 0) { 102 lfree(loc, _T_NUM_ENTRIES * sizeof (tsdent_t)); 103 errno = error; 104 return (NULL); 105 } 106 } 107 108 /* allocate item n */ 109 loc[n].buf = p = lmalloc(size); 110 loc[n].size = size; 111 loc[n].destructor = destructor; 112 return (p); 113 } 114