-#include <kern/lock.h>
-
-typedef struct ulock {
- queue_chain_t thread_link; /* ulocks owned by a thread */
- queue_chain_t held_link; /* ulocks held in the lock set */
- queue_chain_t handoff_link; /* ulocks w/ active handoffs */
-
- decl_mutex_data(,lock) /* ulock lock */
-
- struct lock_set *lock_set; /* the retaining lock set */
- thread_t holder; /* thread that holds the lock */
- unsigned int /* flags */
- /* boolean_t */ blocked:1, /* did threads block waiting? */
- /* boolean_t */ unstable:1, /* unstable? (holder died) */
- /* boolean_t */ ho_wait:1, /* handoff thread waiting? */
- /* boolean_t */ accept_wait:1, /* accepting thread waiting? */
- :0; /* force to long boundary */
-
- struct wait_queue wait_queue; /* queue of blocked threads */
-} Ulock;
-
-typedef struct ulock *ulock_t;
-
-typedef struct lock_set {
- queue_chain_t task_link; /* chain of lock sets owned by a task */
- decl_mutex_data(,lock) /* lock set lock */
- task_t owner; /* task that owns the lock set */
- ipc_port_t port; /* lock set port */
- int ref_count; /* reference count */
-
- boolean_t active; /* active status */
- int n_ulocks; /* number of ulocks in the lock set */
-
- struct ulock ulock_list[1]; /* ulock group list place holder */
-} Lock_Set;
-
-#define ULOCK_NULL ((ulock_t) 0)
-
-#define ULOCK_FREE 0
-#define ULOCK_HELD 1
-
-/*
- * Data structure internal lock macros
- */
-
-#define lock_set_lock_init(ls) mutex_init(&(ls)->lock, 0)
-#define lock_set_lock(ls) mutex_lock(&(ls)->lock)
-#define lock_set_unlock(ls) mutex_unlock(&(ls)->lock)
-
-#define ulock_lock_init(ul) mutex_init(&(ul)->lock, 0)
-#define ulock_lock(ul) mutex_lock(&(ul)->lock)
-#define ulock_unlock(ul) mutex_unlock(&(ul)->lock)
-
-extern void lock_set_init(void);
-
-extern kern_return_t ulock_release_internal(
- ulock_t ulock,
- thread_t thread);
-
-extern kern_return_t lock_make_unstable(
- ulock_t ulock,
- thread_t thread);
-
-extern void ulock_release_all(
- thread_t thread);