set the process shared attribute
pthread_rwlockattr_setpshared() function sets the
process shared attribute of attr to the value referenced
by pshared. pshared may be one of
If successful, the
- Any thread of any process that has access to the memory where the
read/write lock resides can manipulate the lock.
- Only threads created within the same process as the thread that
initialized the read/write lock can manipulate the lock. This is the
function will return zero. Otherwise an error number will be returned to
indicate the error.
pthread_rwlockattr_setpshared() will fail if:
- The value specified by attr or
pshared is invalid.
pthread_rwlockattr_setpshared() function is expected
to conform to Version 2 of the Single UNIX
pthread_rwlockattr_setpshared() function first
appeared in FreeBSD 3.0 and OpenBSD
The PTHREAD_PROCESS_SHARED attribute is not supported.