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ea99f21ce6
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.
64 lines
1.2 KiB
C
64 lines
1.2 KiB
C
/*
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* asctime.c
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* Original Author: G. Haley
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*
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* Converts the broken down time in the structure pointed to by tim_p into a
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* string of the form
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*
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* Wed Jun 15 11:38:07 1988\n\0
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*
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* Returns a pointer to the string.
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*/
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/*
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FUNCTION
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<<asctime>>---format time as string
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INDEX
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asctime
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INDEX
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_asctime_r
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SYNOPSIS
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#include <time.h>
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char *asctime(const struct tm *<[clock]>);
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char *_asctime_r(const struct tm *<[clock]>, char *<[buf]>);
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DESCRIPTION
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Format the time value at <[clock]> into a string of the form
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. Wed Jun 15 11:38:07 1988\n\0
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The string is generated in a static buffer; each call to <<asctime>>
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overwrites the string generated by previous calls.
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RETURNS
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A pointer to the string containing a formatted timestamp.
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PORTABILITY
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ANSI C requires <<asctime>>.
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<<asctime>> requires no supporting OS subroutines.
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*/
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#include <stdlib.h>
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#include <string.h>
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#include <time.h>
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#include <_ansi.h>
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#include <reent.h>
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#ifdef _REENT_THREAD_LOCAL
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_Thread_local char _tls_asctime_buf[_REENT_ASCTIME_SIZE];
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#endif
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#ifndef _REENT_ONLY
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char *
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asctime (const struct tm *tim_p)
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{
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struct _reent *reent = _REENT;
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_REENT_CHECK_ASCTIME_BUF(reent);
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return asctime_r (tim_p, _REENT_ASCTIME_BUF(reent));
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}
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#endif
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