diff options
Diffstat (limited to 'tmpfs/tmpfs.h')
| -rw-r--r-- | tmpfs/tmpfs.h | 20 |
1 files changed, 14 insertions, 6 deletions
diff --git a/tmpfs/tmpfs.h b/tmpfs/tmpfs.h index b3c636d0..ad472009 100644 --- a/tmpfs/tmpfs.h +++ b/tmpfs/tmpfs.h @@ -69,17 +69,25 @@ struct tmpfs_dirent char name[0]; }; -extern unsigned int num_files; -extern off_t tmpfs_page_limit, tmpfs_space_used; - +extern off_t tmpfs_page_limit; extern mach_port_t default_pager; +/* These two must be accessed using atomic operations. */ +extern unsigned int num_files; +extern off_t tmpfs_space_used; + +/* Convenience function to adjust tmpfs_space_used. */ static inline void adjust_used (off_t change) { - pthread_spin_lock (&diskfs_node_refcnt_lock); - tmpfs_space_used += change; - pthread_spin_unlock (&diskfs_node_refcnt_lock); + __atomic_add_fetch (&num_files, change, __ATOMIC_RELAXED); +} + +/* Convenience function to get tmpfs_space_used. */ +static inline off_t +get_used (void) +{ + return __atomic_load_n (&num_files, __ATOMIC_RELAXED); } #endif |