pthread_sigqueue(3) — Linux manual page

pthread_sigqueue(3)     Library Functions Manual     pthread_sigqueue(3)

NAME         top

       pthread_sigqueue - queue a signal and data to a thread

LIBRARY         top

       POSIX threads library (libpthread, -lpthread)

SYNOPSIS         top

       #include <signal.h>
       #include <pthread.h>

       int pthread_sigqueue(pthread_t thread, int sig,
                            const union sigval value);

   Feature Test Macro Requirements for glibc (see
   feature_test_macros(7)):

       pthread_sigqueue():
           _GNU_SOURCE

DESCRIPTION         top

       The pthread_sigqueue() function performs a similar task to
       sigqueue(3), but, rather than sending a signal to a process, it
       sends a signal to a thread in the same process as the calling
       thread.

       The thread argument is the ID of a thread in the same process as
       the caller.  The sig argument specifies the signal to be sent.
       The value argument specifies data to accompany the signal; see
       sigqueue(3) for details.

RETURN VALUE         top

       On success, pthread_sigqueue() returns 0; on error, it returns an
       error number.

ERRORS         top

       EAGAIN The limit of signals which may be queued has been reached.
              (See signal(7) for further information.)

       EINVAL sig was invalid.

       ENOSYS pthread_sigqueue() is not supported on this system.

       ESRCH  thread is not valid.

ATTRIBUTES         top

       For an explanation of the terms used in this section, see
       attributes(7).

       ┌──────────────────────────────────────┬───────────────┬─────────┐
       │Interface                             │ Attribute     │ Value   │
       ├──────────────────────────────────────┼───────────────┼─────────┤
       │pthread_sigqueue()                    │ Thread safety │ MT-Safe │
       └──────────────────────────────────────┴───────────────┴─────────┘

VERSIONS         top

       The glibc implementation of pthread_sigqueue() gives an error
       (EINVAL) on attempts to send either of the real-time signals used
       internally by the NPTL threading implementation.  See nptl(7) for
       details.

STANDARDS         top

       GNU.

HISTORY         top

       glibc 2.11.

SEE ALSO         top

       rt_tgsigqueueinfo(2), sigaction(2), pthread_sigmask(3),
       sigqueue(3), sigwait(3), pthreads(7), signal(7)

Linux man-pages 6.04           2023-03-30            pthread_sigqueue(3)

Pages that refer to this page: clone(2),  rt_sigqueueinfo(2),  sigqueue(3),  nptl(7),  pthreads(7),  signal(7),  system_data_types(7)

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