Manpages - pthread_sigqueue.3
Table of Contents
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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).
Interface | Attribute | Value |
*pthread_sigqueue*() | Thread safety | MT-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
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