28 Text processing library [text]

28.3 Localization library [localization]

28.3.5 C library locales [c.locales]

28.3.5.1 Header <clocale> synopsis [clocale.syn]

28.3.5.2 Data races [clocale.data.races]

28.3.5.1 Header <clocale> synopsis [clocale.syn]

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namespace std { struct lconv; char* setlocale(int category, const char* locale); lconv* localeconv(); } #define NULL see [support.types.nullptr] #define LC_ALL see below #define LC_COLLATE see below #define LC_CTYPE see below #define LC_MONETARY see below #define LC_NUMERIC see below #define LC_TIME see below
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The contents and meaning of the header <clocale> are the same as the C standard library header <locale.h>.

28.3.5.2 Data races [clocale.data.races]

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Calls to the function setlocale may introduce a data race ([res.on.data.races]) with other calls to setlocale or with calls to the functions listed in Table 103.
See also: ISO/IEC 9899:2024, 7.11
Table 103 — Potential setlocale data races [tab:setlocale.data.races]
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fprintf
isprint
iswdigit
localeconv
tolower
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fscanf
ispunct
iswgraph
mblen
toupper
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isalnum
isspace
iswlower
mbstowcs
towlower
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isalpha
isupper
iswprint
mbtowc
towupper
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isblank
iswalnum
iswpunct
setlocale
wcscoll
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iscntrl
iswalpha
iswspace
strcoll
wcstod
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isdigit
iswblank
iswupper
strerror
wcstombs
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isgraph
iswcntrl
iswxdigit
strtod
wcsxfrm
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islower
iswctype
isxdigit
strxfrm
wctomb