2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 2011 The FreeBSD Foundation
7 * This software was developed by David Chisnall under sponsorship from
8 * the FreeBSD Foundation.
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 #ifndef _XLOCALE_PRIVATE__H_
35 #define _XLOCALE_PRIVATE__H_
41 #include <sys/types.h>
42 #include <machine/atomic.h>
43 #include "setlocale.h"
46 * The XLC_ values are indexes into the components array. They are defined in
47 * the same order as the LC_ values in locale.h, but without the LC_ALL zero
48 * value. Translating from LC_X to XLC_X is done by subtracting one.
50 * Any reordering of this enum should ensure that these invariants are not
63 _Static_assert(XLC_LAST - XLC_COLLATE == 6, "XLC values should be contiguous");
64 _Static_assert(XLC_COLLATE == LC_COLLATE - 1,
65 "XLC_COLLATE doesn't match the LC_COLLATE value.");
66 _Static_assert(XLC_CTYPE == LC_CTYPE - 1,
67 "XLC_CTYPE doesn't match the LC_CTYPE value.");
68 _Static_assert(XLC_MONETARY == LC_MONETARY - 1,
69 "XLC_MONETARY doesn't match the LC_MONETARY value.");
70 _Static_assert(XLC_NUMERIC == LC_NUMERIC - 1,
71 "XLC_NUMERIC doesn't match the LC_NUMERIC value.");
72 _Static_assert(XLC_TIME == LC_TIME - 1,
73 "XLC_TIME doesn't match the LC_TIME value.");
74 _Static_assert(XLC_MESSAGES == LC_MESSAGES - 1,
75 "XLC_MESSAGES doesn't match the LC_MESSAGES value.");
78 * Header used for objects that are reference counted. Objects may optionally
79 * have a destructor associated, which is responsible for destroying the
80 * structure. Global / static versions of the structure should have no
81 * destructor set - they can then have their reference counts manipulated as
82 * normal, but will not do anything with them.
84 * The header stores a retain count - objects are assumed to have a reference
85 * count of 1 when they are created, but the retain count is 0. When the
86 * retain count is less than 0, they are freed.
88 struct xlocale_refcounted {
89 /** Number of references to this component. */
91 /** Function used to destroy this component, if one is required*/
92 void(*destructor)(void*);
95 #define XLOCALE_DEF_VERSION_LEN 12
98 * Header for a locale component. All locale components must begin with this
101 struct xlocale_component {
102 struct xlocale_refcounted header;
103 /** Name of the locale used for this component. */
104 char locale[ENCODING_LEN+1];
105 /** Version of the definition for this component. */
106 char version[XLOCALE_DEF_VERSION_LEN];
110 * xlocale structure, stores per-thread locale information.
113 struct xlocale_refcounted header;
114 /** Components for the locale. */
115 struct xlocale_component *components[XLC_LAST];
116 /** Flag indicating if components[XLC_MONETARY] has changed since the
117 * last call to localeconv_l() with this locale. */
118 int monetary_locale_changed;
119 /** Flag indicating whether this locale is actually using a locale for
120 * LC_MONETARY (1), or if it should use the C default instead (0). */
121 int using_monetary_locale;
122 /** Flag indicating if components[XLC_NUMERIC] has changed since the
123 * last call to localeconv_l() with this locale. */
124 int numeric_locale_changed;
125 /** Flag indicating whether this locale is actually using a locale for
126 * LC_NUMERIC (1), or if it should use the C default instead (0). */
127 int using_numeric_locale;
128 /** Flag indicating whether this locale is actually using a locale for
129 * LC_TIME (1), or if it should use the C default instead (0). */
130 int using_time_locale;
131 /** Flag indicating whether this locale is actually using a locale for
132 * LC_MESSAGES (1), or if it should use the C default instead (0). */
133 int using_messages_locale;
134 /** The structure to be returned from localeconv_l() for this locale. */
136 /** Buffer used by nl_langinfo_l() */
141 * Increments the reference count of a reference-counted structure.
143 __attribute__((unused)) static void*
144 xlocale_retain(void *val)
146 struct xlocale_refcounted *obj = val;
147 atomic_add_long(&(obj->retain_count), 1);
151 * Decrements the reference count of a reference-counted structure, freeing it
152 * if this is the last reference, calling its destructor if it has one.
154 __attribute__((unused)) static void
155 xlocale_release(void *val)
157 struct xlocale_refcounted *obj = val;
160 count = atomic_fetchadd_long(&(obj->retain_count), -1) - 1;
161 if (count < 0 && obj->destructor != NULL)
162 obj->destructor(obj);
166 * Load functions. Each takes the name of a locale and a pointer to the data
167 * to be initialised as arguments. Two special values are allowed for the
169 extern void* __collate_load(const char*, locale_t);
170 extern void* __ctype_load(const char*, locale_t);
171 extern void* __messages_load(const char*, locale_t);
172 extern void* __monetary_load(const char*, locale_t);
173 extern void* __numeric_load(const char*, locale_t);
174 extern void* __time_load(const char*, locale_t);
176 extern struct _xlocale __xlocale_global_locale;
177 extern struct _xlocale __xlocale_C_locale;
180 * Caches the rune table in TLS for fast access.
182 void __set_thread_rune_locale(locale_t loc);
184 * Flag indicating whether a per-thread locale has been set. If no per-thread
185 * locale has ever been set, then we always use the global locale.
187 extern int __has_thread_locale;
190 * The per-thread locale. Avoids the need to use pthread lookup functions when
191 * getting the per-thread locale.
193 extern _Thread_local locale_t __thread_locale;
196 * Returns the current locale for this thread, or the global locale if none is
197 * set. The caller does not have to free the locale. The return value from
198 * this call is not guaranteed to remain valid after the locale changes. As
199 * such, this should only be called within libc functions.
201 static inline locale_t __get_locale(void)
204 if (!__has_thread_locale) {
205 return (&__xlocale_global_locale);
207 return (__thread_locale ? __thread_locale : &__xlocale_global_locale);
210 locale_t __get_locale(void);
214 * Two magic values are allowed for locale_t objects. NULL and -1. This
215 * function maps those to the real locales that they represent.
217 static inline locale_t get_real_locale(locale_t locale)
219 switch ((intptr_t)locale) {
220 case 0: return (&__xlocale_C_locale);
221 case -1: return (&__xlocale_global_locale);
222 default: return (locale);
227 * Replace a placeholder locale with the real global or thread-local locale_t.
229 #define FIX_LOCALE(l) (l = get_real_locale(l))