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/*-
* Copyright (c) 2011 The FreeBSD Foundation
* All rights reserved.
*
* This software was developed by David Chisnall under sponsorship from
* the FreeBSD Foundation.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*/
#ifndef _XLOCALE_PRIVATE__H_
#define _XLOCALE_PRIVATE__H_
#include <xlocale.h>
#include <locale.h>
#include <stdlib.h>
#include <stdint.h>
#include <sys/types.h>
#include <machine/atomic.h>
#include "setlocale.h"
enum {
XLC_COLLATE = 0,
XLC_CTYPE,
XLC_MONETARY,
XLC_NUMERIC,
XLC_TIME,
XLC_MESSAGES,
XLC_LAST
};
/**
* Header used for objects that are reference counted. Objects may optionally
* have a destructor associated, which is responsible for destroying the
* structure. Global / static versions of the structure should have no
* destructor set - they can then have their reference counts manipulated as
* normal, but will not do anything with them.
*
* The header stores a retain count - objects are assumed to have a reference
* count of 1 when they are created, but the retain count is 0. When the
* retain count is less than 0, they are freed.
*/
struct xlocale_refcounted {
/** Number of references to this component. */
long retain_count;
/** Function used to destroy this component, if one is required*/
void(*destructor)(void*);
};
/**
* Header for a locale component. All locale components must begin with this
* header.
*/
struct xlocale_component {
struct xlocale_refcounted header;
/** Name of the locale used for this component. */
char locale[ENCODING_LEN+1];
};
/**
* xlocale structure, stores per-thread locale information.
*/
struct _xlocale {
struct xlocale_refcounted header;
/** Components for the locale. */
struct xlocale_component *components[XLC_LAST];
/** Flag indicating if components[XLC_MONETARY] has changed since the
* last call to localeconv_l() with this locale. */
int monetary_locale_changed;
/** Flag indicating whether this locale is actually using a locale for
* LC_MONETARY (1), or if it should use the C default instead (0). */
int using_monetary_locale;
/** Flag indicating if components[XLC_NUMERIC] has changed since the
* last call to localeconv_l() with this locale. */
int numeric_locale_changed;
/** Flag indicating whether this locale is actually using a locale for
* LC_NUMERIC (1), or if it should use the C default instead (0). */
int using_numeric_locale;
/** Flag indicating whether this locale is actually using a locale for
* LC_TIME (1), or if it should use the C default instead (0). */
int using_time_locale;
/** Flag indicating whether this locale is actually using a locale for
* LC_MESSAGES (1), or if it should use the C default instead (0). */
int using_messages_locale;
/** The structure to be returned from localeconv_l() for this locale. */
struct lconv lconv;
/** Persistent state used by mblen() calls. */
__mbstate_t mblen;
/** Persistent state used by mbrlen() calls. */
__mbstate_t mbrlen;
/** Persistent state used by mbrtowc() calls. */
__mbstate_t mbrtowc;
/** Persistent state used by mbsnrtowcs() calls. */
__mbstate_t mbsnrtowcs;
/** Persistent state used by mbsrtowcs() calls. */
__mbstate_t mbsrtowcs;
/** Persistent state used by mbtowc() calls. */
__mbstate_t mbtowc;
/** Persistent state used by wcrtomb() calls. */
__mbstate_t wcrtomb;
/** Persistent state used by wcsnrtombs() calls. */
__mbstate_t wcsnrtombs;
/** Persistent state used by wcsrtombs() calls. */
__mbstate_t wcsrtombs;
/** Persistent state used by wctomb() calls. */
__mbstate_t wctomb;
/** Buffer used by nl_langinfo_l() */
char *csym;
};
/**
* Increments the reference count of a reference-counted structure.
*/
__attribute__((unused)) static void*
xlocale_retain(void *val)
{
struct xlocale_refcounted *obj = val;
atomic_add_long(&(obj->retain_count), 1);
return (val);
}
/**
* Decrements the reference count of a reference-counted structure, freeing it
* if this is the last reference, calling its destructor if it has one.
*/
__attribute__((unused)) static void
xlocale_release(void *val)
{
struct xlocale_refcounted *obj = val;
long count = atomic_fetchadd_long(&(obj->retain_count), -1) - 1;
if (count < 0) {
if (0 != obj->destructor) {
obj->destructor(obj);
}
}
}
/**
* Load functions. Each takes the name of a locale and a pointer to the data
* to be initialised as arguments. Two special values are allowed for the
*/
extern void* __collate_load(const char*, locale_t);
extern void* __ctype_load(const char*, locale_t);
extern void* __messages_load(const char*, locale_t);
extern void* __monetary_load(const char*, locale_t);
extern void* __numeric_load(const char*, locale_t);
extern void* __time_load(const char*, locale_t);
extern struct _xlocale __xlocale_global_locale;
extern struct _xlocale __xlocale_C_locale;
/**
* Caches the rune table in TLS for fast access.
*/
void __set_thread_rune_locale(locale_t loc);
/**
* Flag indicating whether a per-thread locale has been set. If no per-thread
* locale has ever been set, then we always use the global locale.
*/
extern int __has_thread_locale;
#ifndef __NO_TLS
/**
* The per-thread locale. Avoids the need to use pthread lookup functions when
* getting the per-thread locale.
*/
extern _Thread_local locale_t __thread_locale;
/**
* Returns the current locale for this thread, or the global locale if none is
* set. The caller does not have to free the locale. The return value from
* this call is not guaranteed to remain valid after the locale changes. As
* such, this should only be called within libc functions.
*/
inline locale_t __get_locale(void)
{
if (!__has_thread_locale) {
return (&__xlocale_global_locale);
}
return (__thread_locale ? __thread_locale : &__xlocale_global_locale);
}
#else
locale_t __get_locale(void);
#endif
/**
* Two magic values are allowed for locale_t objects. NULL and -1. This
* function maps those to the real locales that they represent.
*/
static inline locale_t get_real_locale(locale_t locale)
{
switch ((intptr_t)locale) {
case 0: return (&__xlocale_C_locale);
case -1: return (&__xlocale_global_locale);
default: return (locale);
}
}
/**
* Replace a placeholder locale with the real global or thread-local locale_t.
*/
#define FIX_LOCALE(l) (l = get_real_locale(l))
#endif
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