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eliminate costly tricks to avoid TLS access for current locale state

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the code being removed used atomics to track whether any threads might
be using a locale other than the current global locale, and whether
any threads might have abstract 8-bit (non-UTF-8) LC_CTYPE active, a
feature which was never committed (still pending). the motivations
were to support early execution prior to setup of the thread pointer,
to partially support systems (ancient kernels) where thread pointer
setup is not possible, and to avoid high performance cost on archs
where accessing the thread pointer may be very slow.

since commit 19a1fe670a, the thread
pointer is always available, so these hacks are no longer needed.
removing them greatly simplifies the affected code.
This commit is contained in:
Rich Felker
2015-05-16 01:53:54 -04:00
parent 707d7c30f3
commit 68630b55c0
5 changed files with 4 additions and 27 deletions
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6
src/internal/locale_impl.h
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@ -20,11 +20,9 @@ const char *__lctrans_cur(const char *);
#define LCTRANS(msg, lc, loc) __lctrans(msg, (loc)->cat[(lc)-2])
#define LCTRANS_CUR(msg) __lctrans_cur(msg)
#define CURRENT_LOCALE \
(libc.uselocale_cnt ? __pthread_self()->locale : &libc.global_locale)
#define CURRENT_LOCALE (__pthread_self()->locale)
#define CURRENT_UTF8 \
(libc.bytelocale_cnt_minus_1<0 || __pthread_self()->locale->ctype_utf8)
#define CURRENT_UTF8 (__pthread_self()->locale->ctype_utf8)
#undef MB_CUR_MAX
#define MB_CUR_MAX (CURRENT_UTF8 ? 4 : 1)