Name
pthread_kill — send a signal to a thread
Synopsis
#include <signal.h>
int
pthread_kill( |
pthread_t thread, |
int sig); |
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DESCRIPTION
The pthread_kill() function
sends the signal sig
to thread, a thread
in the same process as the caller. The signal is
asynchronously directed to thread.
If sig is 0, then
no signal is sent, but error checking is still performed.
RETURN VALUE
On success, pthread_kill()
returns 0; on error, it returns an error number, and no
signal is sent.
ATTRIBUTES
For an explanation of the terms used in this section, see attributes(7).
| Interface | Attribute | Value |
pthread_kill() |
Thread safety | MT-Safe |
NOTES
Signal dispositions are process-wide: if a signal handler
is installed, the handler will be invoked in the thread
thread, but if the
disposition of the signal is "stop", "continue", or
"terminate", this action will affect the whole process.
The glibc implementation of pthread_kill() 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.
POSIX.1-2008 recommends that if an implementation detects
the use of a thread ID after the end of its lifetime,
pthread_kill() should return
the error ESRCH. The glibc
implementation returns this error in the cases where an
invalid thread ID can be detected. But note also that POSIX
says that an attempt to use a thread ID whose lifetime has
ended produces undefined behavior, and an attempt to use an
invalid thread ID in a call to pthread_kill() can, for example, cause a
segmentation fault.
SEE ALSO
kill(2), sigaction(2), sigpending(2), pthread_self(3), pthread_sigmask(3), raise(3), pthreads(7), signal(7)
COLOPHON
This page is part of release 4.07 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/.
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