X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/d65d1121602ae06e7c9854a07099aaaa60f40bbd..bdee40d2bc54baf9489148cbfbd6bd1fcd6469df:/examples/smpi/pingpong.c

diff --git a/examples/smpi/pingpong.c b/examples/smpi/pingpong.c
index 636c985221..871c229b9d 100644
--- a/examples/smpi/pingpong.c
+++ b/examples/smpi/pingpong.c
@@ -1,60 +1,69 @@
 /* A simple example pingpong pogram to test MPI_Send and MPI_Recv */
 
+/* Copyright (c) 2009, 2010. The SimGrid Team.
+ * All rights reserved.                                                     */
 
+/* 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 <stdio.h>
 #include <mpi.h>
 
 int main(int argc, char *argv[])
 {
-	  const int tag1 = 42, tag2= 43;           /* Message tag */
-	  int rank; 
-	  int size; 
-	  int msg=99;
-	  int err;
-	  int pivot;
-	  MPI_Status status;
-
-	  err = MPI_Init(&argc, &argv); /* Initialize MPI */
-	  if (err != MPI_SUCCESS) {
-		    printf("MPI initialization failed!\n");
-		    exit(1);
-	  }
-	  err = MPI_Comm_size(MPI_COMM_WORLD, &size); /* Get nr of tasks */
-	  err = MPI_Comm_rank(MPI_COMM_WORLD, &rank);     /* Get id of this process */
-	  if ( size < 2 ) {
-		    printf("run this program with exactly 2 processes (-np 2)\n");
-		    MPI_Finalize();         
-		    exit(0);
-	  }
-        if (0 == rank) {
-				printf("\n    *** Ping-pong test (MPI_Send/MPI_Recv) ***\n\n");
-	  }
-
-        /* start pingpong tests between several pairs */
-	  for (pivot=0; pivot<size-1; pivot++) {
-
-		    if (pivot == rank) {           
-		    		printf("\n== pivot=%d : pingpong [%d] <--> [%d]\n",pivot,pivot,pivot+1);
-
-				int dst= rank + 1;
-				printf("[%d] About to send 1st message '%d' to process [%d] \n", rank,msg, dst);
-				err = MPI_Send(&msg, 1, MPI_INT, dst, tag1, MPI_COMM_WORLD);
-
-				err = MPI_Recv(&msg, 1, MPI_INT, dst, tag2, MPI_COMM_WORLD, &status);    /* Receive a message */
-				printf("[%d] Received relpy message '%d' from process [%d] \n", rank,msg, dst);
-
-		    }
-		    if ((pivot+1) == rank) {
-				int src= rank - 1;
-				err = MPI_Recv(&msg, 1, MPI_INT, src, tag1, MPI_COMM_WORLD, &status);    /* Receive a message */
-				printf("[%d] Received 1st message '%d' from process [%d] \n", rank,msg, src);
-				msg++;
-				printf("[%d] increment message's value to  '%d'\n", rank,msg);
-				printf("[%d] About to send back message '%d' to process [%d] \n", rank,msg, src);
-				err = MPI_Send(&msg, 1, MPI_INT, src, tag2, MPI_COMM_WORLD);
-		    }
-	  }
-	  err = MPI_Finalize();         /* Terminate MPI */
-	  return 0;
+  const int tag1 = 42, tag2 = 43;       /* Message tag */
+  int rank;
+  int size;
+  int msg = 99;
+  int err;
+  int pivot;
+  MPI_Status status;
+
+  err = MPI_Init(&argc, &argv); /* Initialize MPI */
+  if (err != MPI_SUCCESS) {
+    printf("MPI initialization failed!\n");
+    exit(1);
+  }
+  err = MPI_Comm_size(MPI_COMM_WORLD, &size);   /* Get nr of tasks */
+  err = MPI_Comm_rank(MPI_COMM_WORLD, &rank);   /* Get id of this process */
+  if (size < 2) {
+    printf("run this program with exactly 2 processes (-np 2)\n");
+    MPI_Finalize();
+    exit(0);
+  }
+  if (0 == rank) {
+    printf("\n    *** Ping-pong test (MPI_Send/MPI_Recv) ***\n\n");
+  }
+
+  /* start pingpong tests between several pairs */
+  for (pivot = 0; pivot < size - 1; pivot++) {
+
+    if (pivot == rank) {
+      printf("\n== pivot=%d : pingpong [%d] <--> [%d]\n", pivot, pivot,
+             pivot + 1);
+
+      int dst = rank + 1;
+      printf("[%d] About to send 1st message '%d' to process [%d] \n",
+             rank, msg, dst);
+      err = MPI_Send(&msg, 1, MPI_INT, dst, tag1, MPI_COMM_WORLD);
+
+      err = MPI_Recv(&msg, 1, MPI_INT, dst, tag2, MPI_COMM_WORLD, &status);     /* Receive a message */
+      printf("[%d] Received relpy message '%d' from process [%d] \n", rank,
+             msg, dst);
+
+    }
+    if ((pivot + 1) == rank) {
+      int src = rank - 1;
+      err = MPI_Recv(&msg, 1, MPI_INT, src, tag1, MPI_COMM_WORLD, &status);     /* Receive a message */
+      printf("[%d] Received 1st message '%d' from process [%d] \n", rank,
+             msg, src);
+      msg++;
+      printf("[%d] increment message's value to  '%d'\n", rank, msg);
+      printf("[%d] About to send back message '%d' to process [%d] \n",
+             rank, msg, src);
+      err = MPI_Send(&msg, 1, MPI_INT, src, tag2, MPI_COMM_WORLD);
+    }
+  }
+  err = MPI_Finalize();         /* Terminate MPI */
+  return 0;
 }