Section: Linux Programmer's Manual (3)
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difftime - calculate time difference
double difftime(time_t time1, time_t time0);
function returns the number of seconds elapsed
between time time1
and time time0
, represented as a
Each of the times is specified in calendar time, which means its
value is a measurement (in seconds) relative to the
Epoch, 1970-01-01 00:00:00 +0000 (UTC).
Multithreading (see pthreads(7))
function is thread-safe.
SVr4, 4.3BSD, C89, C99.
On a POSIX system,
is an arithmetic type, and one could just
#define difftime(t1,t0) (double)(t1 - t0)
when the possible overflow in the subtraction is not a concern.
This page is part of release 3.74 of the Linux
A description of the project,
information about reporting bugs,
and the latest version of this page,
can be found at
- Multithreading (see pthreads(7))
- CONFORMING TO
- SEE ALSO