9.2 State

The processor architecture-independent portion of a mutex object consists of:

struct fluke_mutex_state  {

	integer_t	hash;	/* object hash value */
	integer_t	flags;	/* attributes of the mutex */
	integer_t	locked;	/* TRUE if mutex is currently locked */
 

}

fluke_ref_t *owner_ref;

hash is the immutable hash value for the object.

flags describes the attributes of the mutex object:

MUTEX_INHERIT_PRI

Specifies that the thread currently holding the mutex should inherit the CPU priority from any thread blocking on the mutex.

MUTEX_PRI_CEILING

Use the POSIX priority ceiling protocol.

MUTEX_MULTITASK

Mutex is accessible to any thread that can access the object's memory.

locked is non-zero if the mutex object is currently locked.

owner_ref is a reference to the thread object currently holding the mutex. If null, the mutex must be unlocked (locked is FALSE).