| pthread_timedjoin_np(3) - phpMan
PTHREAD_TRYJOIN_NP(3) Linux Programmer's Manual PTHREAD_TRYJOIN_NP(3)
NAME
pthread_tryjoin_np, pthread_timedjoin_np - try to join with a terminated thread
SYNOPSIS
#define _GNU_SOURCE /* See feature_test_macros(7) */
#include <pthread.h>
int pthread_tryjoin_np(pthread_t thread, void **retval);
int pthread_timedjoin_np(pthread_t thread, void **retval,
const struct timespec *abstime);
Compile and link with -pthread.
DESCRIPTION
These functions operate in the same way as pthread_join(3), except for the differences
described on this page.
The pthread_tryjoin_np() function performs a nonblocking join with the thread thread,
returning the exit status of the thread in *retval. If thread has not yet terminated,
then instead of blocking, as is done by pthread_join(3), the call returns an error.
The pthread_timedjoin_np() function performs a join-with-timeout. If thread has not yet
terminated, then the call blocks until a maximum time, specified in abstime. If the time‐
out expires before thread terminates, the call returns an error. The abstime argument is
a structure of the following form, specifying an absolute time measured since the Epoch
(see time(2)):
struct timespec {
time_t tv_sec; /* seconds */
long tv_nsec; /* nanoseconds */
};
RETURN VALUE
On success, these functions return 0; on error, they return an error number.
ERRORS
These functions can fail with the same errors as pthread_join(3). pthread_tryjoin_np()
can in addition fail with the following error:
EBUSY thread had not yet terminated at the time of the call.
pthread_timedjoin_np() can in addition fail with the following error:
ETIMEDOUT
The call timed out before thread terminated.
pthread_timedjoin_np() never returns the error EINTR.
VERSIONS
These functions first appeared in glibc in version 2.3.3.
CONFORMING TO
These functions are nonstandard GNU extensions; hence the suffix "_np" (nonportable) in
the names.
EXAMPLE
The following code waits to join for up to 5 seconds:
struct timespec ts;
int s;
...
if (clock_gettime(CLOCK_REALTIME, &ts) == -1) {
/* Handle error */
}
ts.tv_sec += 5;
s = pthread_timedjoin_np(thread, NULL, &ts);
if (s != 0) {
/* Handle error */
}
SEE ALSO
clock_gettime(2), pthread_exit(3), pthread_join(3), pthreads(7)
COLOPHON
This page is part of release 3.74 of the Linux man-pages project. A description of the
project, information about reporting bugs, and the latest version of this page, can be
found at http://www.kernel.org/doc/man-pages/.
Linux 2010-09-10 PTHREAD_TRYJOIN_NP(3)
|