diff options
| author | Matt Joyce <matthew.joyce@embedded-brains.de> | 2022-05-16 12:51:54 +0300 |
|---|---|---|
| committer | Sebastian Huber <sebastian.huber@embedded-brains.de> | 2022-07-13 07:55:46 +0300 |
| commit | ea99f21ce6c8a332845439ea87f792dbaf679d42 (patch) | |
| tree | 94cfcaf461882955f7461b09d6c4c0e2f321e66e /newlib/libc/time | |
| parent | 1a0908203606527b6ac0ed438669b5bcd247a5f9 (diff) | |
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.
Diffstat (limited to 'newlib/libc/time')
| -rw-r--r-- | newlib/libc/time/asctime.c | 4 | ||||
| -rw-r--r-- | newlib/libc/time/gmtime.c | 4 |
2 files changed, 8 insertions, 0 deletions
diff --git a/newlib/libc/time/asctime.c b/newlib/libc/time/asctime.c index 9aa26c3dc..a81506181 100644 --- a/newlib/libc/time/asctime.c +++ b/newlib/libc/time/asctime.c @@ -45,6 +45,10 @@ ANSI C requires <<asctime>>. #include <_ansi.h> #include <reent.h> +#ifdef _REENT_THREAD_LOCAL +_Thread_local char _tls_asctime_buf[_REENT_ASCTIME_SIZE]; +#endif + #ifndef _REENT_ONLY char * diff --git a/newlib/libc/time/gmtime.c b/newlib/libc/time/gmtime.c index 08e011129..a78d55433 100644 --- a/newlib/libc/time/gmtime.c +++ b/newlib/libc/time/gmtime.c @@ -47,6 +47,10 @@ ANSI C requires <<gmtime>>. #define _GMT_OFFSET 0 +#ifdef _REENT_THREAD_LOCAL +_Thread_local struct __tm _tls_localtime_buf; +#endif + #ifndef _REENT_ONLY struct tm * |