PTHREAD_KILL(3P)                                    POSIX Programmer's Manual                                   PTHREAD_KILL(3P)



PROLOG
       This  manual  page is part of the POSIX Programmer's Manual.  The Linux implementation of this interface may differ (con-
       sult the corresponding Linux manual page for details of Linux behavior), or the  interface  may  not  be  implemented  on
       Linux.

NAME
       pthread_kill - send a signal to a thread

SYNOPSIS
       #include <signal.h>

       int pthread_kill(pthread_t thread, int sig);


DESCRIPTION
       The pthread_kill() function shall request that a signal be delivered to the specified thread.

       As in kill(), if sig is zero, error checking shall be performed but no signal shall actually be sent.

RETURN VALUE
       Upon  successful  completion,  the  function shall return a value of zero.  Otherwise, the function shall return an error
       number. If the pthread_kill() function fails, no signal shall be sent.

ERRORS
       The pthread_kill() function shall fail if:

       ESRCH  No thread could be found corresponding to that specified by the given thread ID.

       EINVAL The value of the sig argument is an invalid or unsupported signal number.


       The pthread_kill() function shall not return an error code of [EINTR].

       The following sections are informative.

EXAMPLES
       None.

APPLICATION USAGE
       The pthread_kill() function provides a mechanism for asynchronously directing  a  signal  at  a  thread  in  the  calling
       process. This could be used, for example, by one thread to affect broadcast delivery of a signal to a set of threads.

       Note that pthread_kill() only causes the signal to be handled in the context of the given thread; the signal action (ter-
       mination or stopping) affects the process as a whole.

RATIONALE
       None.

FUTURE DIRECTIONS
       None.

SEE ALSO
       kill(), pthread_self(), raise(), the Base Definitions volume of IEEE Std 1003.1-2001, <signal.h>

COPYRIGHT
       Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1, 2003  Edition,  Standard  for
       Information  Technology -- Portable Operating System Interface (POSIX), The Open Group Base Specifications Issue 6, Copy-
       right (C) 2001-2003 by the Institute of Electrical and Electronics Engineers, Inc and The Open Group. In the event of any
       discrepancy  between this version and the original IEEE and The Open Group Standard, the original IEEE and The Open Group
       Standard  is  the  referee   document.   The   original   Standard   can   be   obtained   online   at   http://www.open-
       group.org/unix/online.html .



IEEE/The Open Group                                           2003                                              PTHREAD_KILL(3P)