kolibrios-fun/contrib/sdk/sources/newlib/libc/time/time.c
Sergey Semyonov (Serge) 7315bb05c0 newlib-2.1.0
git-svn-id: svn://kolibrios.org@4921 a494cfbc-eb01-0410-851d-a64ba20cac60
2014-05-10 22:12:19 +00:00

54 lines
1.0 KiB
C

/*
FUNCTION
<<time>>---get current calendar time (as single number)
INDEX
time
ANSI_SYNOPSIS
#include <time.h>
time_t time(time_t *<[t]>);
TRAD_SYNOPSIS
#include <time.h>
time_t time(<[t]>)
time_t *<[t]>;
DESCRIPTION
<<time>> looks up the best available representation of the current
time and returns it, encoded as a <<time_t>>. It stores the same
value at <[t]> unless the argument is <<NULL>>.
RETURNS
A <<-1>> result means the current time is not available; otherwise the
result represents the current time.
PORTABILITY
ANSI C requires <<time>>.
Supporting OS subroutine required: Some implementations require
<<gettimeofday>>.
*/
/* Most times we have a system call in newlib/libc/sys/.. to do this job */
#include <_ansi.h>
#include <reent.h>
#include <sys/types.h>
#include <sys/time.h>
time_t
_DEFUN (time, (t),
time_t * t)
{
struct timeval now;
if (_gettimeofday_r (_REENT, &now, NULL) >= 0)
{
if (t)
*t = now.tv_sec;
return now.tv_sec;
}
return -1;
}