diff options
Diffstat (limited to 'include/block/graph-lock.h')
| -rw-r--r-- | include/block/graph-lock.h | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/include/block/graph-lock.h b/include/block/graph-lock.h index b27d8a5fb1..85e8a53b73 100644 --- a/include/block/graph-lock.h +++ b/include/block/graph-lock.h @@ -135,6 +135,21 @@ void coroutine_fn bdrv_graph_co_rdunlock(void); void bdrv_graph_rdlock_main_loop(void); void bdrv_graph_rdunlock_main_loop(void); +/* + * assert_bdrv_graph_readable: + * Make sure that the reader is either the main loop, + * or there is at least a reader helding the rdlock. + * In this way an incoming writer is aware of the read and waits. + */ +void assert_bdrv_graph_readable(void); + +/* + * assert_bdrv_graph_writable: + * Make sure that the writer is the main loop and has set @has_writer, + * so that incoming readers will pause. + */ +void assert_bdrv_graph_writable(void); + typedef struct GraphLockable { } GraphLockable; /* |