WHAT: New OMPI_RTE_EVENT_BASE define
WHY: The usnic BTL needs to run some events asynchronously; the ORTE event base
already exists and is running asynchronously in MPI processes
WHERE: in ompi/mca/rte/rte.h and rte_orte.h
TIMEOUT: COB Friday, 21 Feb 2014
MORE DETAIL:
The WHY line described it pretty well: we want to run some things
asynchronously in the usnic BTL and we don't really want to re-invent the wheel
(or add yet another thread in each MPI process). The ORTE event base is
already there, there's already a thread servicing it, and Ralph tells me that
it is safe to add our own events on to it.
The patch below adds the new OMPI_RTE_EVENT_BASE #define.
diff --git a/ompi/mca/rte/orte/rte_orte.h b/ompi/mca/rte/orte/rte_orte.h
index 3c88c6d..3ceadb8 100644
--- a/ompi/mca/rte/orte/rte_orte.h
+++ b/ompi/mca/rte/orte/rte_orte.h
@@ -142,6 +142,9 @@ typedef struct {
} ompi_orte_tracker_t;
OBJ_CLASS_DECLARATION(ompi_orte_tracker_t);
+/* define the event base that the RTE exports */
+#define OMPI_RTE_EVENT_BASE orte_event_base
+
END_C_DECLS
#endif /* MCA_OMPI_RTE_ORTE_H */
diff --git a/ompi/mca/rte/rte.h b/ompi/mca/rte/rte.h
index 69ad488..de10dff 100644
--- a/ompi/mca/rte/rte.h
+++ b/ompi/mca/rte/rte.h
@@ -150,7 +150,9 @@
* a. OMPI_DB_HOSTNAME
* b. OMPI_DB_LOCALITY
*
- * (g) Communication support
+ * (g) Asynchronous / event support
+ * 1. OMPI_RTE_EVENT_BASE - the libevent base that executes in a
+ * separate thread
*
*/
@@ -162,6 +164,7 @@
#include "opal/dss/dss_types.h"
#include "opal/mca/mca.h"
#include "opal/mca/base/base.h"
+#include "opal/mca/event/event.h"
BEGIN_C_DECLS
