pthread_get_expiration_np - Obtains a value representing a desired expiration time.
DECthreads POSIX 1003.1c Library (libpthread.so)
const struct timespec *delta,
struct timespec *abstime);
Number of seconds and nanoseconds to add to the current system time. (The result is the time in the future.) This result will be placed in abstime. Value representing the absolute expiration time. The absolute expiration time is obtained by adding delta to the current system time. The resulting abstime is in Universal Coordinated Time (UTC). This value should be passed to the pthread_cond_timedwait(3) routine.
This routine adds a specified interval to the current absolute system time and returns a new absolute time. This new absolute time is used as the expiration time in a call to pthread_cond_timedwait(3).
The timespec structure contains the following two fields: tv_sec is an integral number of seconds. tv.nsec is an integral number of nanoseconds.
If an error condition occurs, this routine returns an integer value indicating the type of error. Possible return values are as follows: Successful completion. The value specified by delta is invalid.
Manuals: Guide to DECthreads and Programmer's Guide