don't let every process do the initialization, only rank 0

[simgrid.git] / examples / smpi / replay / replay.c

diff --git a/examples/smpi/replay/replay.c b/examples/smpi/replay/replay.c
index 8ac5990..fb0e9f9 100644 (file)
--- a/examples/smpi/replay/replay.c
+++ b/examples/smpi/replay/replay.c
@@ -3,7 +3,7 @@
 /* This program is free software; you can redistribute it and/or modify it
  * under the terms of the license (GNU LGPL) which comes with this package. */
 
-#include "xbt/replay.h"
+#include "xbt/replay.hpp"
 #include "smpi/smpi.h"
 
 /* This shows how to extend the trace format by adding a new kind of events.
@@ -14,11 +14,27 @@ static void action_blah(const char* const* args)
      args is a strings array containing the blank-separated parameters found in the trace for this event instance. */
 }
 
+action_fun previous_send;
+static void overriding_send(const char* const* args)
+{
+  (*previous_send)(args); // Just call the overriden symbol. That's a toy example.
+}
+
 int main(int argc, char *argv[]) {
+  /* Setup things and register default actions */
+  smpi_replay_init(&argc, &argv);
+
   /* Connect your callback function to the "blah" event in the trace files */
   xbt_replay_action_register("blah", action_blah);
 
+  /* The send action is an override, so we have to first save its previous value in a global */
+  int rank;
+  MPI_Comm_rank(MPI_COMM_WORLD, &rank);
+  if (rank == 0) {
+    previous_send = xbt_replay_action_get("send");
+    xbt_replay_action_register("send", overriding_send);
+  }
   /* The regular run of the replayer */
-  smpi_replay_run(&argc, &argv);
+  smpi_replay_main(&argc, &argv);
   return 0;
 }