Converge the library APIs for different transports more closely.

1 files changed, 26 insertions, 0 deletions

diff --git a/libgps_shm.c b/libgps_shm.c
index c14ef4ea..61690d1c 100644
--- a/libgps_shm.c
+++ b/libgps_shm.c
@@ -51,6 +51,14 @@ int gps_shm_open(/*@out@*/struct gps_data_t *gpsdata)
     return 0;
 }
 
+bool gps_shm_waiting(const struct gps_data_t *gpsdata UNUSED, 
+		     int timeout UNUSED)
+/* is there input waiting from the GPS? */
+{
+    /* someday, actually check a timestamp */
+    return true;
+}
+
 int gps_shm_read(struct gps_data_t *gpsdata)
 /* read an update from the shared-memory segment */
 {
@@ -109,6 +117,24 @@ void gps_shm_close(struct gps_data_t *gpsdata)
 	(void)shmdt((const void *)gpsdata->privdata);
 }
 
+
+int gps_shm_mainloop(struct gps_data_t *gpsdata, int timeout, 
+		     int (*hook)(struct gps_data_t *gpsdata, bool fix))
+/* run a shm main loop with a specified handler */
+{
+    for (;;) {
+	if (!gps_shm_waiting(gpsdata, timeout)) {
+	    if ((*hook)(gpsdata, false) != 0)
+		break;
+	} else {
+	    (void)gps_shm_read(gpsdata);
+	    if ((*hook)(gpsdata, true) != 0)
+		break;
+	}
+    }
+    return 0;
+}
+
 #endif /* SHM_EXPORT_ENABLE */
 
 /* end */