Correct potenital locking issue in msg allocation

[ric-plt/lib/rmr.git] / src / rmr / common / include / rmr_agnostic.h

diff --git a/src/rmr/common/include/rmr_agnostic.h b/src/rmr/common/include/rmr_agnostic.h
index ab718d3..31e2c4d 100644 (file)
--- a/src/rmr/common/include/rmr_agnostic.h
+++ b/src/rmr/common/include/rmr_agnostic.h
@@ -258,6 +258,10 @@ typedef struct {
 #define RING_NONE      0                       // no options
 #define RING_RLOCK     0x01            // create/destroy the read lock on the ring
 #define RING_WLOCK     0x02            // create/destroy the write lockk on the ring
+#define RING_FRLOCK    0x04            // read locking with no wait if locked option
+
+                                                               // flag values
+#define RING_FL_FLOCK  0x01    // fast read lock (don't wait if locked when reading)
 
 typedef struct ring {
        uint16_t head;                          // index of the head of the ring (insert point)
@@ -265,6 +269,7 @@ typedef struct ring {
        uint16_t nelements;                     // number of elements in the ring
        void**  data;                           // the ring data (pointers to blobs of stuff)
        int             pfd;                            // event fd for the ring for epoll
+       int             flags;                          // RING_FL_* constants
        pthread_mutex_t*        rgate;  // read lock if used
        pthread_mutex_t*        wgate;  // write lock if used
 } ring_t;