dumb me. sg_size_t are not doubles

[simgrid.git] / src / msg / msg_io.cpp

diff --git a/src/msg/msg_io.cpp b/src/msg/msg_io.cpp
index 7faed32..3a2037d 100644 (file)
--- a/src/msg/msg_io.cpp
+++ b/src/msg/msg_io.cpp
@@ -4,6 +4,8 @@
 /* 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 <simgrid/s4u/host.hpp>
+
 #include "msg_private.h"
 #include "xbt/log.h"
 
@@ -92,6 +94,9 @@ sg_size_t MSG_file_read(msg_file_t fd, sg_size_t size)
   msg_file_priv_t file_priv = MSG_file_priv(fd);
   sg_size_t read_size;
 
+  if (file_priv->size == 0) /* Nothing to read, return */
+    return 0;
+
   /* Find the host where the file is physically located and read it */
   msg_storage_t storage_src =(msg_storage_t) xbt_lib_get_elm_or_null(storage_lib, file_priv->storageId);
   msg_storage_priv_t storage_priv_src = MSG_storage_priv(storage_src);
@@ -106,7 +111,7 @@ sg_size_t MSG_file_read(msg_file_t fd, sg_size_t size)
 
     m_host_list[0] = MSG_host_self();
     m_host_list[1] = attached_host;
-    double flops_amount[] = { 0, 0 };
+    double flops_amount[] = { 0, 0};
     double bytes_amount[] = { 0, 0, (double)read_size, 0 };
 
     msg_task_t task = MSG_parallel_task_create("file transfer for read", 2, m_host_list, flops_amount, bytes_amount,
@@ -137,6 +142,9 @@ sg_size_t MSG_file_write(msg_file_t fd, sg_size_t size)
 {
   msg_file_priv_t file_priv = MSG_file_priv(fd);
 
+  if (size == 0) /* Nothing to write, return */
+    return 0;
+
   /* Find the host where the file is physically located (remote or local)*/
   msg_storage_t storage_src =(msg_storage_t) xbt_lib_get_elm_or_null(storage_lib, file_priv->storageId);
   msg_storage_priv_t storage_priv_src = MSG_storage_priv(storage_src);