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PTHREAD_RWLOCKATTR_SETPSHARED(3)            DragonFly Library Functions Manual

NAME
     pthread_rwlockattr_setpshared - set the process shared attribute

LIBRARY
     POSIX Threads Library (libpthread, -lpthread)

SYNOPSIS
     #include <pthread.h>

     int
     pthread_rwlockattr_setpshared(pthread_rwlockattr_t *attr, int pshared);

DESCRIPTION
     The pthread_rwlockattr_setpshared() function sets the process shared
     attribute of attr to the value referenced by pshared.  The pshared
     argument may be one of two values:

     PTHREAD_PROCESS_SHARED       Any thread of any process that has access to
                                  the memory where the read/write lock resides
                                  can manipulate the lock.

     PTHREAD_PROCESS_PRIVATE      Only threads created within the same process
                                  as the thread that initialized the
                                  read/write lock can manipulate the lock.
                                  This is the default value.

RETURN VALUES
     If successful, the pthread_rwlockattr_setpshared() function will return
     zero.  Otherwise an error number will be returned to indicate the error.

ERRORS
     The pthread_rwlockattr_setpshared() function will fail if:

     [EINVAL]           The value specified by attr or pshared is invalid.

SEE ALSO
     pthread_rwlockattr_getpshared(3), pthread_rwlockattr_init(3),
     pthread_rwlock_init(3)

STANDARDS
     The pthread_rwlockattr_setpshared() function is expected to conform to
     Version 2 of the Single UNIX Specification ("SUSv2").

HISTORY
     The pthread_rwlockattr_setpshared() function first appeared in
     FreeBSD 3.0.

BUGS
     The PTHREAD_PROCESS_SHARED attribute is not supported.

DragonFly 5.9-DEVELOPMENT        July 10, 2009       DragonFly 5.9-DEVELOPMENT