time_t, suseconds_t, useconds_t - integer time
Standard C library (
libc)
#include <time.h>
typedef /* ... */ time_t;
#include <sys/types.h>
typedef /* ... */ suseconds_t;
typedef /* ... */ useconds_t;
- time_t
- Used for time in seconds. According to POSIX, it is an
integer type.
- suseconds_t
- Used for time in microseconds. It is a signed integer type
capable of storing values al least in the range [-1,
1000000].
- useconds_t
- Used for time in microseconds. It is an unsigned integer
type capable of storing values al least in the range [0,
1000000].
- time_t
-
<sched.h> defines time_t since
POSIX.1-2008.
- suseconds_t
- POSIX.1-2001 defined useconds_t in
<unistd.h> too.
time_t: C99 and later; POSIX.1-2001 and later.
suseconds_t,
useconds_t: POSIX.1-2001 and later.
On some architectures, the width of
time_t can be controlled with the
feature test macro
_TIME_BITS.
- time_t
- The following headers also provide time_t:
<sched.h>, <sys/msg.h>,
<sys/select.h>, <sys/sem.h>,
<sys/shm.h>, <sys/stat.h>,
<sys/time.h>, <sys/types.h>, and
<utime.h>.
- suseconds_t
- The following headers also provide suseconds_t:
<sys/select.h> and <sys/time.h>.
stime(2),
time(2),
ctime(3),
difftime(3),
usleep(3),
timeval(3type)