PTHREAD_SIGQUEUE

Section: Linux Programmer's Manual (3)
Updated: 2021-03-22
Index Return to Main Contents
 

NAME

pthread_sigqueue - queue a signal and data to a thread  

SYNOPSIS

#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
 

DESCRIPTION

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

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

ERRORS

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.
 

VERSIONS

The pthread_sigqueue() function first appeared in glibc 2.11.  

ATTRIBUTES

For an explanation of the terms used in this section, see attributes(7).
InterfaceAttributeValue
pthread_sigqueue() Thread safetyMT-Safe

 

CONFORMING TO

This function is a GNU extension.  

NOTES

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.  

SEE ALSO

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

COLOPHON

This page is part of release 5.11 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/.


 

Index

NAME
SYNOPSIS
DESCRIPTION
RETURN VALUE
ERRORS
VERSIONS
ATTRIBUTES
CONFORMING TO
NOTES
SEE ALSO
COLOPHON

This document was created by man2html, using the manual pages.
Time: 06:22:46 GMT, May 09, 2021