diff options
Diffstat (limited to 'kern/lock.h')
| -rw-r--r-- | kern/lock.h | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/kern/lock.h b/kern/lock.h index e88e1824..2781a48a 100644 --- a/kern/lock.h +++ b/kern/lock.h @@ -174,6 +174,9 @@ struct lock { /* boolean_t */ can_sleep:1, /* Can attempts to lock go to sleep? */ recursion_depth:12, /* Depth of recursion */ :0; +#if MACH_LDEBUG + struct thread *writer; +#endif /* MACH_LDEBUG */ decl_simple_lock_data(,interlock) /* Hardware interlock field. Last in the structure so that @@ -203,6 +206,17 @@ extern boolean_t lock_try_read_to_write(lock_t); extern void lock_set_recursive(lock_t); extern void lock_clear_recursive(lock_t); +/* Lock debugging support. */ +#if ! MACH_LDEBUG +#define have_read_lock(l) 1 +#define have_write_lock(l) 1 +#else /* MACH_LDEBUG */ +/* XXX: We don't keep track of readers, so this is an approximation. */ +#define have_read_lock(l) ((l)->read_count > 0) +#define have_write_lock(l) ((l)->writer == current_thread()) +#endif /* MACH_LDEBUG */ +#define have_lock(l) (have_read_lock(l) || have_write_lock(l)) + void db_show_all_slocks(void); #endif /* _KERN_LOCK_H_ */ |