pthread_condattr_setpshared(3)			pthread_condattr_setpshared(3)

NAME
       pthread_condattr_setpshared  - Change the process-shared attribute of a
       condition variable attributes object

SYNOPSIS
       #include <pthread.h>

       int pthread_condattr_setpshared(
	       pthread_condattr_t attr,
	       int pshared );

LIBRARY
       DECthreads POSIX 1003.1c Library (libpthread.so)

PARAMETERS
       Address of the condition variable  attributes  objects  whose  process-
       shared  attribute  is  to  be  set.   New  value for the process-shared
       attribute of the condition  variable  attributes	 object	 specified  by
       attr.

DESCRIPTION
       This  routine  uses  the value specified in the pshared argument to set
       the process-shared  attribute  of  the  condition  variable  attributes
       object specified in the attr argument.

       Creating	 a condition variable whose process-shared attribute is set to
       PTHREAD_PROCESS_PRIVATE permits it to be operated upon by threads  cre‐
       ated  within the same process as the thread that initialized the condi‐
       tion variable.  If threads of differing processes attempt to operate on
       such a condition variable, the behavior is undefined.

       The  default  value  of	the process-shared attribute of an initialized
       condition variable attributes object is PTHREAD_PROCESS_PRIVATE.

       Creating a condition variable whose process-shared attribute is set  to
       PTHREAD_PROCESS_SHARED  permits	it  to	be operated upon by any thread
       that has access to the memory where that condition  variable  is	 allo‐
       cated,  even  if	 it  is allocated in memory that is shared by multiple
       processes.

RETURN VALUES
       If an error condition occurs, this routine  returns  an	integer	 value
       indicating  the	type  of error. Possible return values are as follows:
       Successful completion.  The value specified by  attr  is	 not  a	 valid
       attributes  object,  or	the  value specified by pshared is outside the
       range of legal values for that attribute.

ERRORS
       None

SEE ALSO
       Functions: pthread_condattr_getpshared(3), pthread_condattr_init(3)

       Manuals: Guide to DECthreads and Programmer's Guide

						pthread_condattr_setpshared(3)

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