Add basic locking support to rtspin

This is useful for testing locking protocol implementations (not
intended for benchmarking!), and also serves to document how to use
the LITMUS^RT locking API.

1 files changed, 7 insertions, 0 deletions

diff --git a/include/litmus.h b/include/litmus.h
index 2b6a1dd..58af6b7 100644
--- a/include/litmus.h
+++ b/include/litmus.h
@@ -80,6 +80,13 @@ static inline int od_open(int fd, obj_type_t type, int obj_id)
         return od_openx(fd, type, obj_id, 0);
 }
 
+int litmus_open_lock(
+        obj_type_t protocol,    /* which locking protocol to use, e.g., FMLP_SEM */
+        int lock_id,            /* numerical id of the lock, user-specified */
+        const char* namespace,  /* path to a shared file */
+        void *config_param);    /* any extra info needed by the protocol (such
+                                 * as CPU under SRP and PCP), may be NULL */
+
 /* real-time locking protocol support */
 int litmus_lock(int od);
 int litmus_unlock(int od);