Manpages - pthread_sigqueue.3

pthread_sigqueue - queue a signal and data to a thread

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

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

Compile and link with -pthread.

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

*pthread_sigqueue*():

      _GNU_SOURCE

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.

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

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.

The *pthread_sigqueue*() function first appeared in glibc 2.11.

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

This function is a GNU extension.

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.

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

This page is part of release 5.13 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 https://www.kernel.org/doc/man-pages/.