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718fe473dd
Our version of this function currently returns an integer indicating failure or success, whereas POSIX specifies that this function has no return value. It returns void. Patch up the header, sources and man page to use the right type. While there, use the opportunity to simplify the body of this function. Theoretically speaking, this change breaks the ABI of this function. That said, I have yet to find any code that makes use of freelocale()'s return value. I couldn't find any of it in the base system, nor did an exp-run reveal any breakage caused by this change. PR: 211394 (exp-run)
368 lines
8.4 KiB
C
368 lines
8.4 KiB
C
/*-
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* Copyright (c) 2011 The FreeBSD Foundation
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* All rights reserved.
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*
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* This software was developed by David Chisnall under sponsorship from
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* the FreeBSD Foundation.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#include <pthread.h>
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#include <stdio.h>
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#include <string.h>
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#include <runetype.h>
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#include "libc_private.h"
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#include "xlocale_private.h"
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/**
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* Each locale loader declares a global component. This is used by setlocale()
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* and also by xlocale with LC_GLOBAL_LOCALE..
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*/
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extern struct xlocale_component __xlocale_global_collate;
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extern struct xlocale_component __xlocale_global_ctype;
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extern struct xlocale_component __xlocale_global_monetary;
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extern struct xlocale_component __xlocale_global_numeric;
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extern struct xlocale_component __xlocale_global_time;
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extern struct xlocale_component __xlocale_global_messages;
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/*
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* And another version for the statically-allocated C locale. We only have
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* components for the parts that are expected to be sensible.
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*/
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extern struct xlocale_component __xlocale_C_collate;
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extern struct xlocale_component __xlocale_C_ctype;
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#ifndef __NO_TLS
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/*
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* The locale for this thread.
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*/
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_Thread_local locale_t __thread_locale;
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#endif
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/*
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* Flag indicating that one or more per-thread locales exist.
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*/
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int __has_thread_locale;
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/*
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* Private functions in setlocale.c.
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*/
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const char *
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__get_locale_env(int category);
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int
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__detect_path_locale(void);
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struct _xlocale __xlocale_global_locale = {
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{0},
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{
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&__xlocale_global_collate,
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&__xlocale_global_ctype,
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&__xlocale_global_monetary,
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&__xlocale_global_numeric,
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&__xlocale_global_time,
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&__xlocale_global_messages
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},
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1,
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0,
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1,
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0
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};
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struct _xlocale __xlocale_C_locale = {
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{0},
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{
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&__xlocale_C_collate,
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&__xlocale_C_ctype,
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0, 0, 0, 0
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},
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1,
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0,
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1,
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0
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};
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static void*(*constructors[])(const char*, locale_t) =
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{
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__collate_load,
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__ctype_load,
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__monetary_load,
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__numeric_load,
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__time_load,
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__messages_load
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};
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static pthread_key_t locale_info_key;
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static int fake_tls;
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static locale_t thread_local_locale;
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static void init_key(void)
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{
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pthread_key_create(&locale_info_key, xlocale_release);
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pthread_setspecific(locale_info_key, (void*)42);
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if (pthread_getspecific(locale_info_key) == (void*)42) {
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pthread_setspecific(locale_info_key, 0);
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} else {
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fake_tls = 1;
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}
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/* At least one per-thread locale has now been set. */
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__has_thread_locale = 1;
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__detect_path_locale();
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}
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static pthread_once_t once_control = PTHREAD_ONCE_INIT;
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static locale_t
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get_thread_locale(void)
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{
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_once(&once_control, init_key);
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return (fake_tls ? thread_local_locale :
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pthread_getspecific(locale_info_key));
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}
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#ifdef __NO_TLS
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locale_t
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__get_locale(void)
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{
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locale_t l = get_thread_locale();
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return (l ? l : &__xlocale_global_locale);
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}
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#endif
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static void
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set_thread_locale(locale_t loc)
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{
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locale_t l = (loc == LC_GLOBAL_LOCALE) ? 0 : loc;
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_once(&once_control, init_key);
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if (NULL != l) {
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xlocale_retain((struct xlocale_refcounted*)l);
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}
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locale_t old = pthread_getspecific(locale_info_key);
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if ((NULL != old) && (l != old)) {
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xlocale_release((struct xlocale_refcounted*)old);
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}
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if (fake_tls) {
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thread_local_locale = l;
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} else {
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pthread_setspecific(locale_info_key, l);
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}
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#ifndef __NO_TLS
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__thread_locale = l;
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__set_thread_rune_locale(loc);
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#endif
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}
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/**
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* Clean up a locale, once its reference count reaches zero. This function is
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* called by xlocale_release(), it should not be called directly.
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*/
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static void
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destruct_locale(void *l)
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{
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locale_t loc = l;
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for (int type=0 ; type<XLC_LAST ; type++) {
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if (loc->components[type]) {
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xlocale_release(loc->components[type]);
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}
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}
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if (loc->csym) {
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free(loc->csym);
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}
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free(l);
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}
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/**
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* Allocates a new, uninitialised, locale.
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*/
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static locale_t
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alloc_locale(void)
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{
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locale_t new = calloc(sizeof(struct _xlocale), 1);
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new->header.destructor = destruct_locale;
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new->monetary_locale_changed = 1;
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new->numeric_locale_changed = 1;
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return (new);
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}
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static void
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copyflags(locale_t new, locale_t old)
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{
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new->using_monetary_locale = old->using_monetary_locale;
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new->using_numeric_locale = old->using_numeric_locale;
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new->using_time_locale = old->using_time_locale;
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new->using_messages_locale = old->using_messages_locale;
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}
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static int dupcomponent(int type, locale_t base, locale_t new)
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{
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/* Always copy from the global locale, since it has mutable components.
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*/
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struct xlocale_component *src = base->components[type];
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if (&__xlocale_global_locale == base) {
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new->components[type] = constructors[type](src->locale, new);
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if (new->components[type]) {
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strncpy(new->components[type]->locale, src->locale,
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ENCODING_LEN);
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}
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} else if (base->components[type]) {
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new->components[type] = xlocale_retain(base->components[type]);
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} else {
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/* If the component was NULL, return success - if base is a
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* valid locale then the flag indicating that this isn't
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* present should be set. If it isn't a valid locale, then
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* we're stuck anyway. */
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return 1;
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}
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return (0 != new->components[type]);
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}
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/*
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* Public interfaces. These are the five public functions described by the
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* xlocale interface.
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*/
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locale_t newlocale(int mask, const char *locale, locale_t base)
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{
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int type;
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const char *realLocale = locale;
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int useenv = 0;
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int success = 1;
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_once(&once_control, init_key);
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locale_t new = alloc_locale();
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if (NULL == new) {
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return (NULL);
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}
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FIX_LOCALE(base);
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copyflags(new, base);
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if (NULL == locale) {
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realLocale = "C";
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} else if ('\0' == locale[0]) {
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useenv = 1;
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}
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for (type=0 ; type<XLC_LAST ; type++) {
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if (mask & 1) {
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if (useenv) {
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realLocale = __get_locale_env(type);
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}
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new->components[type] =
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constructors[type](realLocale, new);
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if (new->components[type]) {
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strncpy(new->components[type]->locale,
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realLocale, ENCODING_LEN);
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} else {
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success = 0;
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break;
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}
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} else {
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if (!dupcomponent(type, base, new)) {
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success = 0;
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break;
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}
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}
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mask >>= 1;
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}
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if (0 == success) {
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xlocale_release(new);
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new = NULL;
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}
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return (new);
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}
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locale_t duplocale(locale_t base)
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{
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locale_t new = alloc_locale();
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int type;
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_once(&once_control, init_key);
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if (NULL == new) {
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return (NULL);
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}
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FIX_LOCALE(base);
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copyflags(new, base);
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for (type=0 ; type<XLC_LAST ; type++) {
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dupcomponent(type, base, new);
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}
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return (new);
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}
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/*
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* Free a locale_t. This is quite a poorly named function. It actually
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* disclaims a reference to a locale_t, rather than freeing it.
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*/
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void
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freelocale(locale_t loc)
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{
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/*
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* Fail if we're passed something that isn't a locale. If we're
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* passed the global locale, pretend that we freed it but don't
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* actually do anything.
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*/
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if (loc != NULL && loc != LC_GLOBAL_LOCALE &&
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loc != &__xlocale_global_locale)
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xlocale_release(loc);
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}
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/*
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* Returns the name of the locale for a particular component of a locale_t.
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*/
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const char *querylocale(int mask, locale_t loc)
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{
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int type = ffs(mask) - 1;
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FIX_LOCALE(loc);
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if (type >= XLC_LAST)
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return (NULL);
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if (loc->components[type])
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return (loc->components[type]->locale);
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return ("C");
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}
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/*
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* Installs the specified locale_t as this thread's locale.
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*/
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locale_t uselocale(locale_t loc)
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{
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locale_t old = get_thread_locale();
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if (NULL != loc) {
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set_thread_locale(loc);
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}
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return (old ? old : LC_GLOBAL_LOCALE);
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}
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