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man:pthread_kill

PTHREAD_KILL(3) Linux Programmer's Manual PTHREAD_KILL(3)

NAME

     pthread_kill - send a signal to a thread

SYNOPSIS

     #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

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 per-
     formed.

RETURN VALUE

     On success, pthread_kill() returns 0; on error,  it  returns  an  error
     number, and no signal is sent.

ERRORS

     EINVAL An invalid signal was specified.

ATTRIBUTES

     For   an   explanation   of   the  terms  used  in  this  section,  see
     attributes(7).
     +---------------+---------------+---------+
     |Interface      | Attribute     | Value   |
     +---------------+---------------+---------+
     |pthread_kill() | Thread safety | MT-Safe |
     +---------------+---------------+---------+

CONFORMING TO

     POSIX.1-2001, POSIX.1-2008.

NOTES

     Signal dispositions are process-wide: if a signal handler is installed,
     the  handler  will be invoked in the thread thread, but if the disposi-
     tion 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_sig-
     mask(3), raise(3), pthreads(7), signal(7)

COLOPHON

     This  page  is  part of release 4.16 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 2017-09-15 PTHREAD_KILL(3)

/data/webs/external/dokuwiki/data/pages/man/pthread_kill.txt · Last modified: 2019/05/17 09:47 by 127.0.0.1

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