pthread_sigqueue(3) - Linux manual page (original) (raw)

pthreadsigqueue(3) Library Functions Manual pthreadsigqueue(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)](../man3/sigqueue.3.html), 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)](../man3/sigqueue.3.html) 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)](../man7/signal.7.html) 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)](../man7/attributes.7.html).
   ┌──────────────────────────────────────┬───────────────┬─────────┐
   │ **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)](../man7/nptl.7.html) for
   details.

STANDARDS top

   GNU.

HISTORY top

   glibc 2.11.

SEE ALSO top

   [rt_tgsigqueueinfo(2)](../man2/rt%5Ftgsigqueueinfo.2.html), [sigaction(2)](../man2/sigaction.2.html), [pthread_sigmask(3)](../man3/pthread%5Fsigmask.3.html),
   [sigqueue(3)](../man3/sigqueue.3.html), [sigwait(3)](../man3/sigwait.3.html), [pthreads(7)](../man7/pthreads.7.html), [signal(7)](../man7/signal.7.html)

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Linux man-pages 6.10 2024-07-23 pthreadsigqueue(3)

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