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--- old/usr/src/lib/libc/port/locale/setlocale.c
+++ new/usr/src/lib/libc/port/locale/setlocale.c
1 1 /*
2 2 * Copyright 2014 Garrett D'Amore <garrett@damore.org>
3 3 * Copyright 2010 Nexenta Systems, Inc. All rights reserved.
4 4 * Copyright (c) 1996 - 2002 FreeBSD Project
5 5 * Copyright (c) 1991, 1993
6 6 * The Regents of the University of California. All rights reserved.
7 7 *
8 8 * This code is derived from software contributed to Berkeley by
9 9 * Paul Borman at Krystal Technologies.
10 10 *
11 11 * Redistribution and use in source and binary forms, with or without
12 12 * modification, are permitted provided that the following conditions
13 13 * are met:
14 14 * 1. Redistributions of source code must retain the above copyright
15 15 * notice, this list of conditions and the following disclaimer.
16 16 * 2. Redistributions in binary form must reproduce the above copyright
17 17 * notice, this list of conditions and the following disclaimer in the
18 18 * documentation and/or other materials provided with the distribution.
19 19 * 4. Neither the name of the University nor the names of its contributors
20 20 * may be used to endorse or promote products derived from this software
21 21 * without specific prior written permission.
22 22 *
23 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 33 * SUCH DAMAGE.
34 34 */
35 35
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36 36 #include "lint.h"
37 37 #include <sys/types.h>
38 38 #include <sys/stat.h>
39 39 #include <errno.h>
40 40 #include <limits.h>
41 41 #include <locale.h>
42 42 #include <stdlib.h>
43 43 #include <string.h>
44 44 #include <unistd.h>
45 45 #include <stdio.h>
46 +#include "mtlib.h"
46 47 #include "collate.h"
47 48 #include "lnumeric.h" /* for struct lc_numeric */
48 49 #include "lctype.h" /* for struct lc_ctype */
49 50 #include "setlocale.h"
50 51 #include "../i18n/_loc_path.h"
51 52 #include "localeimpl.h"
52 53 #include "../i18n/_locale.h"
53 54
54 55 /*
55 56 * Path to locale storage directory. See ../i18n/_loc_path.h
56 57 */
57 58 char *_PathLocale = _DFLT_LOC_PATH;
58 59
59 60 static char *current_locale(locale_t, int);
60 61 static void install_legacy(locale_t, int);
61 62
63 +static mutex_t setlocale_lock = DEFAULTMUTEX;
64 +static locale_t setlocale_list = NULL;
65 +
62 66 char *
63 67 setlocale(int category, const char *locname)
64 68 {
65 - locale_t oldloc;
66 - locale_t newloc;
69 + locale_t loc;
70 + locale_t srch;
67 71 int mask;
68 72
69 73 if (category < 0 || category > LC_ALL) {
70 74 errno = EINVAL;
71 75 return (NULL);
72 76 }
73 77
74 78 if (locname == NULL)
75 79 return (current_locale(___global_locale, category));
76 80
77 - if ((oldloc = duplocale(___global_locale)) == NULL)
78 - return (NULL);
79 -
80 81 mask = (category == LC_ALL ? LC_ALL_MASK : (1 << category));
81 82
82 - newloc = newlocale(mask, locname, oldloc);
83 - if (newloc == NULL) {
84 - freelocale(oldloc);
83 + loc = newlocale(mask, locname, NULL);
84 + if (loc == NULL) {
85 85 return (NULL);
86 86 }
87 87
88 - oldloc = ___global_locale;
89 - ___global_locale = newloc;
88 + /*
89 + * This next logic looks to see if we have ever used the same locale
90 + * settings before. If so, we reuse it. We avoid ever calling
91 + * freelocale() on a locale setting built up by setlocale, this
92 + * ensures that consumers (uselocale) will always be thread safe;
93 + * the actual locale data objects are never freed, and unique
94 + * locale objects are also never freed. We reuse to avoid leaking
95 + * memory in applications that call setlocale repeatedly.
96 + */
97 + lmutex_lock(&setlocale_lock);
98 + for (srch = setlocale_list; srch != NULL; srch = srch->next) {
99 + if (memcmp(srch->locdata, loc->locdata,
100 + sizeof (loc->locdata[0]) * LC_ALL) != 0) {
101 + continue;
102 + }
103 + break;
104 + }
90 105
91 - install_legacy(newloc, mask);
106 + if (srch == NULL) {
107 + /* this is a new locale, save it for reuse later */
108 + loc->next = setlocale_list;
109 + setlocale_list = loc;
110 + } else {
111 + /* we already had it, toss the new, and use what we found */
112 + freelocale(loc);
113 + loc = srch;
114 + }
115 + ___global_locale = loc;
92 116
93 - freelocale(oldloc);
94 - return (current_locale(newloc, category));
117 + install_legacy(loc, mask);
118 + lmutex_unlock(&setlocale_lock);
119 +
120 + return (current_locale(loc, category));
95 121 }
96 122
97 123 static char *
98 124 current_locale(locale_t loc, int cat)
99 125 {
100 126 int composite = 0;
101 127 static char buf[LC_ALL * (ENCODING_LEN + 1 + 1)];
102 128
103 129 if (cat != LC_ALL) {
104 130 return (loc->locdata[cat]->l_lname);
105 131 }
106 132
107 133 /* Look to see if any category is different */
108 134 for (int i = 1; i < LC_ALL; ++i) {
109 135 if (strcmp(loc->locdata[0]->l_lname,
110 136 loc->locdata[i]->l_lname) != 0) {
111 137 composite = 1;
112 138 break;
113 139 }
114 140 }
115 141
116 142 if (composite) {
117 143 /*
118 144 * Note ordering of these follows the numeric order,
119 145 * if the order is changed, then setlocale() will need
120 146 * to be changed as well.
121 147 */
122 148 (void) snprintf(buf, sizeof (buf),
123 149 "%s/%s/%s/%s/%s/%s",
124 150 loc->locdata[LC_CTYPE]->l_lname,
125 151 loc->locdata[LC_NUMERIC]->l_lname,
126 152 loc->locdata[LC_TIME]->l_lname,
127 153 loc->locdata[LC_COLLATE]->l_lname,
128 154 loc->locdata[LC_MONETARY]->l_lname,
129 155 loc->locdata[LC_MESSAGES]->l_lname);
130 156 return (buf);
131 157 }
132 158
133 159 return (loc->locdata[0]->l_lname);
134 160 }
135 161
136 162 static void
137 163 install_legacy(locale_t loc, int mask)
138 164 {
139 165 /*
140 166 * Update the legacy fixed variables that may be baked into
141 167 * legacy programs. This is really unfortunate, but we can't
142 168 * solve for them otherwise. Note that such legacy programs
143 169 * are only going to see the global locale settings, and cannot
144 170 * benefit from uselocale().
145 171 */
146 172 if (mask & LC_NUMERIC_MASK) {
147 173 struct lc_numeric *lnum;
148 174 lnum = loc->locdata[LC_NUMERIC]->l_data[0];
149 175 _numeric[0] = *lnum->decimal_point;
150 176 _numeric[1] = *lnum->thousands_sep;
151 177 }
152 178
153 179 if (mask & LC_CTYPE_MASK) {
154 180 struct lc_ctype *lct;
155 181 lct = loc->locdata[LC_CTYPE]->l_data[0];
156 182 for (int i = 0; i < _CACHED_RUNES; i++) {
157 183 /* ctype can only encode the lower 8 bits. */
158 184 __ctype[i+1] = lct->lc_ctype_mask[i] & 0xff;
159 185 __ctype_mask[i] = lct->lc_ctype_mask[i];
160 186 }
161 187
162 188 /* The bottom half is the toupper/lower array */
163 189 for (int i = 0; i < _CACHED_RUNES; i++) {
164 190 int u, l;
165 191 __ctype[258 + i] = i;
166 192 u = lct->lc_trans_upper[i];
167 193 l = lct->lc_trans_lower[i];
168 194 if (u && u != i)
169 195 __ctype[258+i] = u;
170 196 if (l && l != i)
171 197 __ctype[258+i] = l;
172 198
173 199 /* Don't forget these annoyances either! */
174 200 __trans_upper[i] = u;
175 201 __trans_lower[i] = l;
176 202 }
177 203
178 204 /* Maximum mblen, cswidth, weird legacy */
179 205 __ctype[520] = lct->lc_max_mblen;
180 206 }
181 207 }
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