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Name

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

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 timeout 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

Errors

EBUSY

thread had not yet terminated at the time of the call.

pthread_timedjoin_np() can in addition fail with the following errors:

ETIMEDOUT

The call timed out before thread terminated.

EINVAL

abstime value is invalid (tv_sec is less than 0 or tv_nsec is greater than 1e9).

pthread_timedjoin_np() never returns the error EINTR.

Versions

Conforming to

Example

    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

Colophon

Table of Contents

• Name
• Synopsis
• Description
• Return Value
• Errors
• Versions
• Conforming to
• Example
• See Also
• Colophon