pthread_mutexattr_getpshared man page on OSF1

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pthread_mutexattr_getpshared(3)		       pthread_mutexattr_getpshared(3)

NAME
       pthread_mutexattr_getpshared  - Obtains the process-shared attribute of
       a mutex attributes object

SYNOPSIS
       #include <pthread.h>

       int pthread_mutexattr_getpshared(
	       const pthread_mutexattr_t *attr,
	       int *pshared );

LIBRARY
       DECthreads POSIX 1003.1c Library (libpthread.so)

PARAMETERS
       Address of the mutex attributes object whose  process-shared  attribute
       is  to  be obtained.  Location to store the value of the process-shared
       attribute of attr.

DESCRIPTION
       This routine obtains the value of the process-shared attribute  in  the
       mutex  attributes  object referenced by attr and stores it at the loca‐
       tion pshared. The object referenced by attr must be initialized	before
       this routine is called.

       Setting the process-shared attribute to PTHREAD_PROCESS_PRIVATE permits
       a mutex to be operated upon by threads created within the same  process
       as  the thread that initialized the mutex. If threads of differing pro‐
       cesses attempt to operate on such a mutex, the behavior is undefined.

       The default value of the process-shared attribute of a mutex attributes
       object is PTHREAD_PROCESS_PRIVATE.

       Setting	the process-shared attribute to PTHREAD_PROCESS_SHARED permits
       a mutex to be operated upon by any thread that has access to the memory
       where  the mutex is allocated, even if the mutex is allocated in memory
       that is shared by multiple programs.

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.

ERRORS
       None

SEE ALSO
       Functions: pthread_mutexattr_setpshared(3), pthread_mutexattr_init(3)

       Manuals: Guide to DECthreads and Programmer's Guide

					       pthread_mutexattr_getpshared(3)
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