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[libc++] Refactor locale_guard (#113694)

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Rename __libcpp_locale_guard to just __locale_guard, since there's no
reason for it to have __libcpp_ in its name -- it's just an internal
utility.

Also, define __locale_guard unconditionally of
_LIBCPP_LOCALE__L_EXTENSIONS, since that header is only used on Windows
(where it has a custom definition) or from bsd_locale_fallbacks.h, which
is only included when the L extensions are not provided.
This commit is contained in:
Louis Dionne
2024-10-25 12:28:55 -04:00
committed by GitHub
parent 5c20891b2b
commit 1f2b7ae6d7
6 changed files with 56 additions and 58 deletions
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2
libcxx/include/CMakeLists.txt
View File

@@ -496,11 +496,11 @@ set(files
__locale_dir/locale_base_api/bsd_locale_fallbacks.h
__locale_dir/locale_base_api/fuchsia.h
__locale_dir/locale_base_api/ibm.h
__locale_dir/locale_base_api/locale_guard.h
__locale_dir/locale_base_api/musl.h
__locale_dir/locale_base_api/newlib.h
__locale_dir/locale_base_api/openbsd.h
__locale_dir/locale_base_api/win32.h
__locale_dir/locale_guard.h
__math/abs.h
__math/copysign.h
__math/error_functions.h

30
libcxx/include/__locale_dir/locale_base_api/bsd_locale_fallbacks.h
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@@ -13,7 +13,7 @@
#ifndef _LIBCPP___LOCALE_DIR_LOCALE_BASE_API_BSD_LOCALE_FALLBACKS_H
#define _LIBCPP___LOCALE_DIR_LOCALE_BASE_API_BSD_LOCALE_FALLBACKS_H
#include <__locale_dir/locale_base_api/locale_guard.h>
#include <__locale_dir/locale_guard.h>
#include <cstdio>
#include <stdarg.h>
#include <stdlib.h>
@@ -29,64 +29,64 @@
_LIBCPP_BEGIN_NAMESPACE_STD
inline _LIBCPP_HIDE_FROM_ABI decltype(MB_CUR_MAX) __libcpp_mb_cur_max_l(locale_t __l) {
__libcpp_locale_guard __current(__l);
__locale_guard __current(__l);
return MB_CUR_MAX;
}
#ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS
inline _LIBCPP_HIDE_FROM_ABI wint_t __libcpp_btowc_l(int __c, locale_t __l) {
__libcpp_locale_guard __current(__l);
__locale_guard __current(__l);
return btowc(__c);
}
inline _LIBCPP_HIDE_FROM_ABI int __libcpp_wctob_l(wint_t __c, locale_t __l) {
__libcpp_locale_guard __current(__l);
__locale_guard __current(__l);
return wctob(__c);
}
inline _LIBCPP_HIDE_FROM_ABI size_t
__libcpp_wcsnrtombs_l(char* __dest, const wchar_t** __src, size_t __nwc, size_t __len, mbstate_t* __ps, locale_t __l) {
__libcpp_locale_guard __current(__l);
__locale_guard __current(__l);
return wcsnrtombs(__dest, __src, __nwc, __len, __ps);
}
inline _LIBCPP_HIDE_FROM_ABI size_t __libcpp_wcrtomb_l(char* __s, wchar_t __wc, mbstate_t* __ps, locale_t __l) {
__libcpp_locale_guard __current(__l);
__locale_guard __current(__l);
return wcrtomb(__s, __wc, __ps);
}
inline _LIBCPP_HIDE_FROM_ABI size_t
__libcpp_mbsnrtowcs_l(wchar_t* __dest, const char** __src, size_t __nms, size_t __len, mbstate_t* __ps, locale_t __l) {
__libcpp_locale_guard __current(__l);
__locale_guard __current(__l);
return mbsnrtowcs(__dest, __src, __nms, __len, __ps);
}
inline _LIBCPP_HIDE_FROM_ABI size_t
__libcpp_mbrtowc_l(wchar_t* __pwc, const char* __s, size_t __n, mbstate_t* __ps, locale_t __l) {
__libcpp_locale_guard __current(__l);
__locale_guard __current(__l);
return mbrtowc(__pwc, __s, __n, __ps);
}
inline _LIBCPP_HIDE_FROM_ABI int __libcpp_mbtowc_l(wchar_t* __pwc, const char* __pmb, size_t __max, locale_t __l) {
__libcpp_locale_guard __current(__l);
__locale_guard __current(__l);
return mbtowc(__pwc, __pmb, __max);
}
inline _LIBCPP_HIDE_FROM_ABI size_t __libcpp_mbrlen_l(const char* __s, size_t __n, mbstate_t* __ps, locale_t __l) {
__libcpp_locale_guard __current(__l);
__locale_guard __current(__l);
return mbrlen(__s, __n, __ps);
}
#endif // _LIBCPP_HAS_NO_WIDE_CHARACTERS
inline _LIBCPP_HIDE_FROM_ABI lconv* __libcpp_localeconv_l(locale_t __l) {
__libcpp_locale_guard __current(__l);
__locale_guard __current(__l);
return localeconv();
}
#ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS
inline _LIBCPP_HIDE_FROM_ABI size_t
__libcpp_mbsrtowcs_l(wchar_t* __dest, const char** __src, size_t __len, mbstate_t* __ps, locale_t __l) {
__libcpp_locale_guard __current(__l);
__locale_guard __current(__l);
return mbsrtowcs(__dest, __src, __len, __ps);
}
#endif
@@ -95,7 +95,7 @@ inline _LIBCPP_ATTRIBUTE_FORMAT(__printf__, 4, 5) int __libcpp_snprintf_l(
char* __s, size_t __n, locale_t __l, const char* __format, ...) {
va_list __va;
va_start(__va, __format);
__libcpp_locale_guard __current(__l);
__locale_guard __current(__l);
int __res = vsnprintf(__s, __n, __format, __va);
va_end(__va);
return __res;
@@ -105,7 +105,7 @@ inline _LIBCPP_ATTRIBUTE_FORMAT(__printf__, 3, 4) int __libcpp_asprintf_l(
char** __s, locale_t __l, const char* __format, ...) {
va_list __va;
va_start(__va, __format);
__libcpp_locale_guard __current(__l);
__locale_guard __current(__l);
int __res = vasprintf(__s, __format, __va);
va_end(__va);
return __res;
@@ -115,7 +115,7 @@ inline _LIBCPP_ATTRIBUTE_FORMAT(__scanf__, 3, 4) int __libcpp_sscanf_l(
const char* __s, locale_t __l, const char* __format, ...) {
va_list __va;
va_start(__va, __format);
__libcpp_locale_guard __current(__l);
__locale_guard __current(__l);
int __res = vsscanf(__s, __format, __va);
va_end(__va);
return __res;

42
libcxx/include/__locale_dir/locale_base_api/locale_guard.h → libcxx/include/__locale_dir/locale_guard.h
View File

@@ -6,8 +6,8 @@
//
//===----------------------------------------------------------------------===//
#ifndef _LIBCPP___LOCALE_DIR_LOCALE_BASE_API_LOCALE_GUARD_H
#define _LIBCPP___LOCALE_DIR_LOCALE_BASE_API_LOCALE_GUARD_H
#ifndef _LIBCPP___LOCALE_DIR_LOCALE_GUARD_H
#define _LIBCPP___LOCALE_DIR_LOCALE_GUARD_H
#include <__config>
#include <__locale> // for locale_t
@@ -19,23 +19,9 @@
_LIBCPP_BEGIN_NAMESPACE_STD
#if !defined(_LIBCPP_LOCALE__L_EXTENSIONS)
struct __libcpp_locale_guard {
_LIBCPP_HIDE_FROM_ABI __libcpp_locale_guard(locale_t& __loc) : __old_loc_(uselocale(__loc)) {}
_LIBCPP_HIDE_FROM_ABI ~__libcpp_locale_guard() {
if (__old_loc_)
uselocale(__old_loc_);
}
locale_t __old_loc_;
__libcpp_locale_guard(__libcpp_locale_guard const&) = delete;
__libcpp_locale_guard& operator=(__libcpp_locale_guard const&) = delete;
};
#elif defined(_LIBCPP_MSVCRT_LIKE)
struct __libcpp_locale_guard {
__libcpp_locale_guard(locale_t __l) : __status(_configthreadlocale(_ENABLE_PER_THREAD_LOCALE)) {
#if defined(_LIBCPP_MSVCRT_LIKE)
struct __locale_guard {
__locale_guard(locale_t __l) : __status(_configthreadlocale(_ENABLE_PER_THREAD_LOCALE)) {
// Setting the locale can be expensive even when the locale given is
// already the current locale, so do an explicit check to see if the
// current locale is already the one we want.
@@ -51,7 +37,7 @@ struct __libcpp_locale_guard {
__setlocale(__l.__get_locale());
}
}
~__libcpp_locale_guard() {
~__locale_guard() {
// The CRT documentation doesn't explicitly say, but setlocale() does the
// right thing when given a semicolon-separated list of locale settings
// for the different categories in the same format as returned by
@@ -71,8 +57,22 @@ struct __libcpp_locale_guard {
int __status;
char* __locale_all = nullptr;
};
#else
struct __locale_guard {
_LIBCPP_HIDE_FROM_ABI __locale_guard(locale_t& __loc) : __old_loc_(uselocale(__loc)) {}
_LIBCPP_HIDE_FROM_ABI ~__locale_guard() {
if (__old_loc_)
uselocale(__old_loc_);
}
locale_t __old_loc_;
__locale_guard(__locale_guard const&) = delete;
__locale_guard& operator=(__locale_guard const&) = delete;
};
#endif
_LIBCPP_END_NAMESPACE_STD
#endif // _LIBCPP___LOCALE_DIR_LOCALE_BASE_API_LOCALE_GUARD_H
#endif // _LIBCPP___LOCALE_DIR_LOCALE_GUARD_H

2
libcxx/include/module.modulemap
View File

@@ -1443,7 +1443,7 @@ module std [system] {
module locale {
header "locale"
header "__locale_dir/locale_base_api.h"
header "__locale_dir/locale_base_api/locale_guard.h"
header "__locale_dir/locale_guard.h"
module locale_base_api {
textual header "__locale_dir/locale_base_api/android.h"
textual header "__locale_dir/locale_base_api/bsd_locale_defaults.h"

4
libcxx/src/iostream.cpp
View File

@@ -12,7 +12,7 @@
#include <string>
#ifdef _LIBCPP_MSVCRT_LIKE
# include <__locale_dir/locale_base_api/locale_guard.h>
# include <__locale_dir/locale_guard.h>
#endif
#define _str(s) #s
@@ -109,7 +109,7 @@ static void force_locale_initialization() {
static bool once = []() {
auto loc = newlocale(LC_ALL_MASK, "C", 0);
{
__libcpp_locale_guard g(loc); // forces initialization of locale TLS
__locale_guard g(loc); // forces initialization of locale TLS
((void)g);
}
freelocale(loc);

34
libcxx/src/support/win32/locale_win32.cpp
View File

@@ -11,12 +11,10 @@
#include <memory>
#include <type_traits>
#include <__locale_dir/locale_base_api/locale_guard.h>
#include <__locale_dir/locale_guard.h>
int __libcpp_vasprintf(char** sptr, const char* __restrict fmt, va_list ap);
using std::__libcpp_locale_guard;
// FIXME: base and mask currently unused. Needs manual work to construct the new locale
locale_t newlocale(int /*mask*/, const char* locale, locale_t /*base*/) {
return {_create_locale(LC_ALL, locale), locale};
@@ -26,33 +24,33 @@ decltype(MB_CUR_MAX) MB_CUR_MAX_L(locale_t __l) {
#if defined(_LIBCPP_MSVCRT)
return ___mb_cur_max_l_func(__l);
#else
__libcpp_locale_guard __current(__l);
std::__locale_guard __current(__l);
return MB_CUR_MAX;
#endif
}
lconv* localeconv_l(locale_t& loc) {
__libcpp_locale_guard __current(loc);
std::__locale_guard __current(loc);
lconv* lc = localeconv();
if (!lc)
return lc;
return loc.__store_lconv(lc);
}
size_t mbrlen_l(const char* __restrict s, size_t n, mbstate_t* __restrict ps, locale_t loc) {
__libcpp_locale_guard __current(loc);
std::__locale_guard __current(loc);
return mbrlen(s, n, ps);
}
size_t
mbsrtowcs_l(wchar_t* __restrict dst, const char** __restrict src, size_t len, mbstate_t* __restrict ps, locale_t loc) {
__libcpp_locale_guard __current(loc);
std::__locale_guard __current(loc);
return mbsrtowcs(dst, src, len, ps);
}
size_t wcrtomb_l(char* __restrict s, wchar_t wc, mbstate_t* __restrict ps, locale_t loc) {
__libcpp_locale_guard __current(loc);
std::__locale_guard __current(loc);
return wcrtomb(s, wc, ps);
}
size_t mbrtowc_l(wchar_t* __restrict pwc, const char* __restrict s, size_t n, mbstate_t* __restrict ps, locale_t loc) {
__libcpp_locale_guard __current(loc);
std::__locale_guard __current(loc);
return mbrtowc(pwc, s, n, ps);
}
size_t mbsnrtowcs_l(wchar_t* __restrict dst,
@@ -61,7 +59,7 @@ size_t mbsnrtowcs_l(wchar_t* __restrict dst,
size_t len,
mbstate_t* __restrict ps,
locale_t loc) {
__libcpp_locale_guard __current(loc);
std::__locale_guard __current(loc);
return mbsnrtowcs(dst, src, nms, len, ps);
}
size_t wcsnrtombs_l(char* __restrict dst,
@@ -70,15 +68,15 @@ size_t wcsnrtombs_l(char* __restrict dst,
size_t len,
mbstate_t* __restrict ps,
locale_t loc) {
__libcpp_locale_guard __current(loc);
std::__locale_guard __current(loc);
return wcsnrtombs(dst, src, nwc, len, ps);
}
wint_t btowc_l(int c, locale_t loc) {
__libcpp_locale_guard __current(loc);
std::__locale_guard __current(loc);
return btowc(c);
}
int wctob_l(wint_t c, locale_t loc) {
__libcpp_locale_guard __current(loc);
std::__locale_guard __current(loc);
return wctob(c);
}
@@ -90,7 +88,7 @@ int snprintf_l(char* ret, size_t n, locale_t loc, const char* format, ...) {
int result = __stdio_common_vsprintf(
_CRT_INTERNAL_LOCAL_PRINTF_OPTIONS | _CRT_INTERNAL_PRINTF_STANDARD_SNPRINTF_BEHAVIOR, ret, n, format, loc, ap);
#else
__libcpp_locale_guard __current(loc);
std::__locale_guard __current(loc);
_LIBCPP_DIAGNOSTIC_PUSH
_LIBCPP_CLANG_DIAGNOSTIC_IGNORED("-Wformat-nonliteral")
int result = vsnprintf(ret, n, format, ap);
@@ -108,25 +106,25 @@ int asprintf_l(char** ret, locale_t loc, const char* format, ...) {
return result;
}
int vasprintf_l(char** ret, locale_t loc, const char* format, va_list ap) {
__libcpp_locale_guard __current(loc);
std::__locale_guard __current(loc);
return __libcpp_vasprintf(ret, format, ap);
}
#if !defined(_LIBCPP_MSVCRT)
float strtof_l(const char* nptr, char** endptr, locale_t loc) {
__libcpp_locale_guard __current(loc);
std::__locale_guard __current(loc);
return strtof(nptr, endptr);
}
long double strtold_l(const char* nptr, char** endptr, locale_t loc) {
__libcpp_locale_guard __current(loc);
std::__locale_guard __current(loc);
return strtold(nptr, endptr);
}
#endif
#if defined(__MINGW32__) && __MSVCRT_VERSION__ < 0x0800
size_t strftime_l(char* ret, size_t n, const char* format, const struct tm* tm, locale_t loc) {
__libcpp_locale_guard __current(loc);
std::__locale_guard __current(loc);
return strftime(ret, n, format, tm);
}
#endif