USELOCALE(3) BSD Library Functions Manual USELOCALE(3)NAME
uselocale -- Set the per-thread locale
SYNOPSIS
#include <xlocale.h>
locale_t
uselocale(locale_t loc);
DESCRIPTION
Sets the per-thread locale to loc. Specify LC_GLOBAL_LOCALE to turn off any per-thread locale. Pass NULL to return the current value of the
per-thread locale (or LC_GLOBAL_LOCALE) without changing the locale.
RETURN VALUES
Returns the previous locale, or LC_GLOBAL_LOCALE if no per-thread locale was in effect.
SEE ALSO duplocale(3), freelocale(3), newlocale(3), querylocale(3), xlocale(3)BSD March 11, 2005 BSD
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DUPLOCALE(3) BSD Library Functions Manual DUPLOCALE(3)NAME
duplocale -- duplicate an locale
LIBRARY
Standard C Library (libc, -lc)
SYNOPSIS
#include <xlocale.h>
locale_t
duplocale(locale_t locale);
DESCRIPTION
Duplicates an existing locale_t returning a new locale_t that refers to the same locale values but has an independent internal state. Vari-
ous functions, such as mblen(3) require a persistent state. These functions formerly used static variables and calls to them from multiple
threads had undefined behavior. They now use fields in the locale_t associated with the current thread by uselocale(3). These calls are
therefore only thread safe on threads with a unique per-thread locale. The locale returned by this call must be freed with freelocale(3).
SEE ALSO freelocale(3), localeconv(3), newlocale(3), querylocale(3), uselocale(3), xlocale(3)STANDARDS
This function conforms to IEEE Std 1003.1-2008 (``POSIX.1'').
BUGS
Ideally, uselocale(3) should make a copy of the locale_t implicitly to ensure thread safety, and a copy of the global locale should be
installed lazily on each thread. The FreeBSD implementation does not do this, for compatibility with Darwin.
BSD September 17, 2011 BSD
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