pthread_sigqueue - queue a signal and data to a thread
POSIX threads library (
libpthread,
-lpthread)
#include <signal.h>
#include <pthread.h>
int pthread_sigqueue(pthread_t thread, int sig,
const union sigval value);
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).
Interface |
Attribute |
Value |
pthread_sigqueue () |
Thread safety |
MT-Safe |
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)