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NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | ERRORS | ATTRIBUTES | CONFORMING TO | NOTES | SEE ALSO | COLOPHON |
PTHREAD_KILL(3) Linux Programmer's Manual PTHREAD_KILL(3)
pthread_kill - send a signal to a thread
#include <signal.h>
int pthread_kill(pthread_t thread, int sig);
Compile and link with -pthread.
Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
pthread_kill():
_POSIX_C_SOURCE >= 199506L || _XOPEN_SOURCE >= 500
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.
On success, pthread_kill() returns 0; on error, it returns an error
number, and no signal is sent.
EINVAL An invalid signal was specified.
For an explanation of the terms used in this section, see
attributes(7).
┌───────────────┬───────────────┬─────────┐
│Interface │ Attribute │ Value │
├───────────────┼───────────────┼─────────┤
│pthread_kill() │ Thread safety │ MT-Safe │
└───────────────┴───────────────┴─────────┘
POSIX.1-2001, POSIX.1-2008.
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.
kill(2), sigaction(2), sigpending(2), pthread_self(3),
pthread_sigmask(3), raise(3), pthreads(7), signal(7)
This page is part of release 4.12 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/.
Linux 2015-08-08 PTHREAD_KILL(3)
Pages that refer to this page: pthread_sigmask(3), raise(3), nptl(7), pthreads(7), signal(7), signal-safety(7)