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Redefine locale info in struct _reent for per-thread locales 

The _reent members _current_category and _current_locale are not
used at all.  _current_locale is set to "C" in various points of
the code but its value is just as unused as _current_category.

This patch redefines these members without changing the size of the
structure to allow for an implementation of per-thread locales per
POSIX-1.2008 (i.e. uselocale and usage of the per-thread locale in
subsequent function calls).

Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
This commit is contained in:
Corinna Vinschen 2016-07-06 15:41:35 +02:00
parent b9ac3c2c8b
commit a68ca43b90
2 changed files with 11 additions and 7 deletions
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17
newlib/libc/include/sys/reent.h
View File

@ -37,6 +37,11 @@ typedef __uint32_t __ULong;
struct _reent;
/* TODO: This structure type isn't defined yet. It's supposed to be used
by locale-specific functions in case a pre-thread locale per SUSv4 has
been specified. */
struct _thr_locale_t;
/*
* If _REENT_SMALL is defined, we make struct _reent as small as possible,
* by having nearly everything possible allocated at first use.
@ -384,8 +389,9 @@ struct _reent
int __sdidinit; /* 1 means stdio has been init'd */
int _current_category; /* unused */
_CONST char *_current_locale; /* unused */
/* TODO */
int _unspecified_locale_info; /* unused, reserved for locale stuff */
struct _thr_locale_t *_locale;/* per-thread locale */
struct _mprec *_mp;
@ -450,7 +456,6 @@ extern const struct __sFILE_fake __sf_fake_stderr;
{ (var)->_stdin = (__FILE *)&__sf_fake_stdin; \
(var)->_stdout = (__FILE *)&__sf_fake_stdout; \
(var)->_stderr = (__FILE *)&__sf_fake_stderr; \
(var)->_current_locale = "C"; \
}
/* Only built the assert() calls if we are built with debugging. */
@ -577,8 +582,9 @@ struct _reent
int _inc; /* used by tmpnam */
char _emergency[_REENT_EMERGENCY_SIZE];
int _current_category; /* used by setlocale */
_CONST char *_current_locale;
/* TODO */
int _unspecified_locale_info; /* unused, reserved for locale stuff */
struct _thr_locale_t *_locale;/* per-thread locale */
int __sdidinit; /* 1 means stdio has been init'd */
@ -697,7 +703,6 @@ struct _reent
{ (var)->_stdin = &(var)->__sf[0]; \
(var)->_stdout = &(var)->__sf[1]; \
(var)->_stderr = &(var)->__sf[2]; \
(var)->_current_locale = "C"; \
(var)->_new._reent._rand_next = 1; \
(var)->_new._reent._r48._seed[0] = _RAND48_SEED_0; \
(var)->_new._reent._r48._seed[1] = _RAND48_SEED_1; \

1
winsup/cygwin/dcrt0.cc
View File

@ -740,7 +740,6 @@ dll_crt0_0 ()
_impure_ptr->_stdin = &_impure_ptr->__sf[0];
_impure_ptr->_stdout = &_impure_ptr->__sf[1];
_impure_ptr->_stderr = &_impure_ptr->__sf[2];
_impure_ptr->_current_locale = "C";
user_data->impure_ptr = _impure_ptr;
user_data->impure_ptr_ptr = &_impure_ptr;