pthread_sigqueue - queue a signal and data to a thread
int pthread_sigqueue(pthread_t thread, int sig,
const union sigval value);
Compile and link with -pthread.
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
The pthread_sigqueue() function first appeared in glibc 2.11.
For an explanation of the terms used in this section, see attributes(7).
- The limit of signals which may be queued has been reached. (See
signal(7) for further information.)
- sig was invalid.
- pthread_sigqueue() is not supported on this system.
- thread is not valid.
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
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