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



PROLOG
       This  manual  page is part of the POSIX Programmer's Manual.  The Linux
       implementation of this interface may differ (consult 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 sig-
	      nal 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 sig-
       nal 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 (termination or stop-
       ping) 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, Copyright (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.opengroup.org/unix/online.html .



IEEE/The Open Group		     2003		       PTHREAD_KILL(P)
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