Make behaviour of OMPT backend configurable.

Author: jblueh

include/opdi/backend/ompt/syncRegionCallbacks.hpp

@@ -80,8 +80,12 @@ namespace opdi {
             logic->onSyncRegion(LogicInterface::SyncRegionKind::BarrierExplicit, endpoint);
             break;
           case ompt_sync_region_barrier_implementation:
+          #if OPDI_OMPT_BACKEND_BARRIER_IMPLEMENTATION_BEHAVIOUR == OPDI_PAIR_OF_AD_EVENTS_PER_ENDPOINT
             logic->onSyncRegion(LogicInterface::SyncRegionKind::BarrierImplementation, LogicInterface::ScopeEndpoint::Begin);
             logic->onSyncRegion(LogicInterface::SyncRegionKind::BarrierImplementation, LogicInterface::ScopeEndpoint::End);
+          #else
+            logic->onSyncRegion(LogicInterface::SyncRegionKind::BarrierImplementation, endpoint);
+          #endif
             break;
         #if _OPENMP >= 202011
           case ompt_sync_region_barrier_implicit_parallel:

include/opdi/config.hpp

@@ -27,8 +27,6 @@
 
 /* ------------------ constants ------------------ */
 
-/* backends */
-
 #define OPDI_MACRO_BACKEND 1
 #define OPDI_OMPT_BACKEND 2
 
@@ -42,6 +40,9 @@
 #define OPDI_OMPT_IMPLICIT_TASK_END 1
 #define OPDI_OMPT_SYNC_REGION_END 2
 
+#define OPDI_PAIR_OF_AD_EVENTS_PER_ENDPOINT 1
+#define OPDI_SINGLE_AD_EVENT_PER_ENDPOINT 2
+
 /* ------------------ configuration ------------------ */
 
 /* ----- backend configuration ----- */
@@ -61,6 +62,12 @@
 static_assert(0 < OPDI_OMPT_BACKEND_IMPLICIT_TASK_END_SOURCE);
 static_assert(OPDI_OMPT_BACKEND_IMPLICIT_TASK_END_SOURCE <= 2);
 
+#ifndef OPDI_OMPT_BACKEND_BARRIER_IMPLEMENTATION_BEHAVIOUR
+  #define OPDI_OMPT_BACKEND_BARRIER_IMPLEMENTATION_BEHAVIOUR OPDI_PAIR_OF_AD_EVENTS_PER_ENDPOINT
+#endif
+
+static_assert(0 < OPDI_OMPT_BACKEND_BARRIER_IMPLEMENTATION_BEHAVIOUR);
+static_assert(OPDI_OMPT_BACKEND_BARRIER_IMPLEMENTATION_BEHAVIOUR <= 2);
 
 /* ----- logic configuration ----- */