28 Localization library [localization]

28.5 C library locales [c.locales]

28.5.2 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 114.
See also: ISO C 7.11
Table 114: Potential setlocale data races [tab:setlocale.data.races]
fprintf
isprint
iswdigit
localeconv
tolower
fscanf
ispunct
iswgraph
mblen
toupper
isalnum
isspace
iswlower
mbstowcs
towlower
isalpha
isupper
iswprint
mbtowc
towupper
isblank
iswalnum
iswpunct
setlocale
wcscoll
iscntrl
iswalpha
iswspace
strcoll
wcstod
isdigit
iswblank
iswupper
strerror
wcstombs
isgraph
iswcntrl
iswxdigit
strtod
wcsxfrm
islower
iswctype
isxdigit
strxfrm
wctomb