set the process shared
function sets the process shared attribute of attr to
the value referenced by pshared.
pshared may be one of two values:
- 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 default value.
If successful, the
pthread_rwlockattr_setpshared() function will return
zero. Otherwise an error number will be returned to indicate the error.
pthread_rwlockattr_setpshared() will fail
- The value specified by attr or pshared is invalid.
function is expected to conform to Version 2 of the
Single UNIX Specification (“SUSv2”).
function first appeared in FreeBSD 3.0 and
The PTHREAD_PROCESS_SHARED attribute is not supported.