pthread_sigqueue - queue a signal and data to a thread

NAME LIBRARY SYNOPSIS DESCRIPTION RETURN VALUE ERRORS ATTRIBUTES VERSIONS STANDARDS HISTORY SEE ALSO

NAME

pthread_sigqueue − queue a signal and data to a thread

LIBRARY

POSIX threads library (libpthread, −lpthread)

SYNOPSIS

#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

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.

ATTRIBUTES

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

VERSIONS

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

GNU.

HISTORY

glibc 2.11.