Commit Graph

11 Commits

Author SHA1 Message Date
Matt Joyce ea99f21ce6 Add --enable-newlib-reent-thread-local option
By default, Newlib uses a huge object of type struct _reent to store
thread-specific data.  This object is returned by __getreent() if the
__DYNAMIC_REENT__ Newlib configuration option is defined.

The reentrancy structure contains for example errno and the standard input,
output, and error file streams.  This means that if an application only uses
errno it has a dependency on the file stream support even if it does not use
it.  This is an issue for lower end targets and applications which need to
qualify the software according to safety standards (for example ECSS-E-ST-40C,
ECSS-Q-ST-80C, IEC 61508, ISO 26262, DO-178, DO-330, DO-333).

If the new _REENT_THREAD_LOCAL configuration option is enabled, then struct
_reent is replaced by dedicated thread-local objects for each struct _reent
member.  The thread-local objects are defined in translation units which use
the corresponding object.
2022-07-13 06:55:46 +02:00
Yaakov Selkowitz 9087163804 ansification: remove _DEFUN
Signed-off-by: Yaakov Selkowitz <yselkowi@redhat.com>
2018-01-17 11:47:26 -06:00
Yaakov Selkowitz fff27f8429 ansification: remove _DEFUN_VOID
Signed-off-by: Yaakov Selkowitz <yselkowi@redhat.com>
2018-01-17 11:47:19 -06:00
Yaakov Selkowitz a38fc79ee9 stdlib: remove TRAD_SYNOPSIS
Signed-off-by: Yaakov Selkowitz <yselkowi@redhat.com>
2017-12-01 03:41:52 -06:00
Jeff Johnston b334e6660a 2013-04-29 Sebastian Huber <sebastian.huber@embedded-brains.de>
* libc/stdio/local.h (CHECK_INIT): Evaluate argument only once.
	(CHECK_STD_INIT): Likewise.
	* libc/stdio/fgetc.c (fgetc): Use local variable for _REENT.
	* libc/stdio/fgetwc.c (fwgetc): Likewise.
	* libc/stdio/fgetws.c (fgetws): Likewise.
	* libc/stdio/fputc.c (fputc): Likewise.
	* libc/stdio/fputwc.c (fputwc): Likewise.
	* libc/stdio/fputws.c (fputws): Likewise.
	* libc/stdio/getc.c (getc): Likewise.
	* libc/stdio/getchar.c (_getchar_r): Likewise.
	* libc/stdio/putc.c (putc): Likewise.
	* libc/stdio/putchar.c (putchar): Likewise.
	* libc/stdio/scanf.c (scanf): Likewise.
	* libc/stdio/setvbuf.c (setvbuf): Likewise.
	* libc/stdio/ungetwc.c (ungetwc): Likewise.
	* libc/stdio/vfscanf.c (VFSCANF): Likewise.
	* libc/stdio/vfwscanf.c (VFWSCANF): Likewise.
	* libc/stdio/viprintf.c (viprintf): Likewise.
	* libc/stdio/viscanf.c (viscanf): Likewise.
	* libc/stdio/vprintf.c (vprintf): Likewise.
	* libc/stdio/vscanf.c (vscanf): Likewise.
	* libc/stdio/vwprintf.c (vwprintf): Likewise.
	* libc/stdio/vwscanf.c (vwscanf): Likewise.
	* libc/stdio/wscanf.c (wscanf): Likewise.
	* libc/stdlib/ecvtbuf.c (fcvtbuf): Likewise.
	(fcvtbuf): Likewise.
	(ecvtbuf): Likewise.
	(ecvtbuf): Likewise.
	* libc/stdlib/mblen.c (mblen): Likewise.
	* libc/stdlib/mbrlen.c (mbrlen): Likewise.
	* libc/stdlib/mbrtowc.c (mbrtowc): Likewise.
	* libc/stdlib/mbtowc.c (mbtowc): Likewise.
	* libc/stdlib/rand.c (srand): Likewise.
	(rand): Likewise.
	* libc/stdlib/wcrtomb.c (wcrtomb): Likewise.
	* libc/stdlib/wctob.c (wctob): Likewise.
	* libc/stdlib/wctomb.c (wctomb): Likewise.
	* libc/string/strtok.c (strtok): Likewise.
	* libc/time/asctime.c (asctime): Likewise.
	* libc/time/gmtime.c (gmtime): Likewise.
	* libc/time/lcltime.c (lcltime): Likewise.
2013-04-29 21:06:23 +00:00
Jeff Johnston 8f9f25dad8 2006-09-12 Paul Brook <paul@codesourcery.com>
* libc/stdlib/rand.c (srand): Add _REENT_CHECK_RAND48.
2006-09-12 17:31:40 +00:00
Jeff Johnston 239c2bf93e 2005-10-28 Bob Wilson <bob.wilson@acm.org>
* libc/misc/unctrl.c: Replace FUNCTION description.
        * libc/signal/signal.c: Remove documentation for raise and  _raise_r.
        * libc/stdio/getdelim.c: Fix spelling errors.
        * libc/stdio/getw.c: Put RETURNS on a separate line.  Fix  punctuation.
        * libc/stdio/putw.c: Likewise.
        * libc/stdlib/a64l.c: Fix formatting, spelling and  punctuation in
        documentation.
        * libc/stdlib/assert.c: Do not capitalize FUNCTION description.
        * libc/stdlib/efgcvt.c: Add spaces to FUNCTION description.
        * libc/stdlib/envlock.c: Use em-dash in FUNCTION description.
        * libc/stdlib/mlock.c: Likewise.
        * libc/stdlib/mstats.c: Likewise.
        * libc/time/tzlock.c: Likewise.
        * libc/stdlib/rand.c: Use "multi-threaded" and "thread-safe"  in NOTES.
        * libc/stdlib/rand48.c: Remove extra space in FUNCTION  description
        and hyphenate "pseudo-random".
        * libc/string/bcmp.c: Remove extra blank lines in  documentation.
        * libc/string/strncat.c: Likewise.
        * libc/string/memchr.c: Remove extra ">" character in  documentation.
        * libc/string/strcspn.c: Use "characters" instead of "chars".
        * libc/string/strpbrk.c: Likewise.
        * libc/string/strerror_r.c: Capitalize "GNU".
        * libc/string/strnlen.c: Likewise.
        * libc/string/strtok.c: Fix formatting, spelling and  punctuation in
        documentation.  Use "multi-threaded" and "thread-safe" in  NOTES.
        * libc/string/wcscat.c: Split PORTABILITY into two paragraphs.
        * libc/string/wcschr.c: Likewise.
        * libc/string/wcscmp.c: Likewise.
        * libc/string/wcscpy.c: Likewise.
        * libc/string/wcscspn.c: Likewise.
        * libc/string/wcslen.c: Likewise.
        * libc/string/wcsncat.c: Likewise.
        * libc/string/wcsncmp.c: Likewise.
        * libc/string/wcsncpy.c: Likewise.
        * libc/string/wcsnlen.c: Likewise.
        * libc/string/wcspbrk.c: Likewise.
        * libc/string/wcsrchr.c: Likewise.
        * libc/string/wcsspn.c: Likewise.
        * libc/string/wmemchr.c: Likewise.
        * libc/string/wmemcmp.c: Likewise.
        * libc/string/wmemcpy.c: Likewise.
        * libc/string/wmemset.c: Likewise.
        * libc/string/wmemmove.c: Likewise.  Also fix FUNCTION  description.
        * libc/string/wcswidth.c: Formatting and punctuation in  documentation.
        * libc/string/wcwidth.c: Likewise.
        * libm/common/s_modf.c: Remove extra period from documentation.
        * libm/math/s_isnan.c: Fix formatting, grammar and  punctuation in
        documentation.
        * libm/mathfp/s_isnan.c: Likewise.
        * libm/math/s_ldexp.c: Fix punctuation.
        * libm/mathfp/s_ldexp.c: Likewise.
        * libm/math/w_log.c: Likewise.
        * libm/mathfp/s_logarithm.c: Likewise.
        * libm/math/w_j0.c: Add spaces to FUNCTION description.
        * libm/mathfp/w_jn.c: Likewise.
2005-10-28 21:21:08 +00:00
Matthew Green 8195aff714 * implement a new `struct _reent' that is significantly smaller. use this
if _REENT_SMALL is defined in config.h.  define this for xstormy16.
2002-02-03 09:24:18 +00:00
Jeff Johnston a704d94a86 Tue Jun 20 14:30:00 2000 Jeff Johnston <jjohnstn@cygnus.com>
* libc/include/sys/reent.h (_rand_next): Added __extension__
        qualifier as long long type is not strict ANSI.
        * libc/stdlib/rand.c (rand): Added __extension__ qualifier
        to long long constant.
2000-06-20 18:34:57 +00:00
Jeff Johnston 46a43a99c6 Fri Jun 9 14:28:00 2000 Jeff Johnston <jjohnstn@cygnus.com>
* libc/include/sys/reent.h (_rand_next): Changed to
        unsigned long long and moved to end of _reent struct in _new union.
        (_REENT_INIT): Changed to move _rand_next initialization.
        * libc/stdlib/rand.c (rand): Changed to use unsigned long long
        linear congruential algorithm that is used by DJGPP.
2000-06-09 18:50:05 +00:00
Christopher Faylor 8a0efa53e4 import newlib-2000-02-17 snapshot 2000-02-17 19:39:52 +00:00