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

diff --git a/src/msg/msg_io.cpp b/src/msg/msg_io.cpp
index aff8c7e..0aa6823 100644 (file)
--- a/src/msg/msg_io.cpp
+++ b/src/msg/msg_io.cpp
@@ -5,9 +5,12 @@
 
 #include "simgrid/s4u/host.hpp"
 #include "src/msg/msg_private.h"
+#include <numeric>
 
 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(msg_io, msg, "Logging specific to MSG (io)");
 
+SG_BEGIN_DECL()
+
 /** @addtogroup msg_file
  * (#msg_file_t) and the functions for managing it.
  *
@@ -31,6 +34,24 @@ void __MSG_file_get_info(msg_file_t fd){
   xbt_dynar_free_container(&info);
 }
 
+static int MSG_host_get_file_descriptor_id(msg_host_t host)
+{
+  simgrid::MsgHostExt* priv = host->extension<simgrid::MsgHostExt>();
+  if (priv->file_descriptor_table == nullptr) {
+    priv->file_descriptor_table = new std::vector<int>(sg_storage_max_file_descriptors);
+    std::iota(priv->file_descriptor_table->rbegin(), priv->file_descriptor_table->rend(), 0); // Fill with ..., 1, 0.
+  }
+  xbt_assert(!priv->file_descriptor_table->empty(), "Too much files are opened! Some have to be closed.");
+  int desc = priv->file_descriptor_table->back();
+  priv->file_descriptor_table->pop_back();
+  return desc;
+}
+
+static void MSG_host_release_file_descriptor_id(msg_host_t host, int id)
+{
+  host->extension<simgrid::MsgHostExt>()->file_descriptor_table->push_back(id);
+}
+
 /** \ingroup msg_file
  *
  * \brief Set the user data of a #msg_file_t.
@@ -196,7 +217,7 @@ msg_file_t MSG_file_open(const char* fullpath, void* data)
   priv->fullpath = xbt_strdup(fullpath);
   priv->simdata = xbt_new0(s_simdata_file_t,1);
   priv->simdata->smx_file = simcall_file_open(fullpath, MSG_host_self());
-  priv->desc_id = __MSG_host_get_file_descriptor_id(MSG_host_self());
+  priv->desc_id           = MSG_host_get_file_descriptor_id(MSG_host_self());
 
   name = bprintf("%s:%s:%d", priv->fullpath, MSG_host_self()->cname(), priv->desc_id);
 
@@ -223,7 +244,7 @@ int MSG_file_close(msg_file_t fd)
 
   int res = simcall_file_close(priv->simdata->smx_file, MSG_host_self());
   name    = bprintf("%s:%s:%d", priv->fullpath, MSG_host_self()->cname(), priv->desc_id);
-  __MSG_host_release_file_descriptor_id(MSG_host_self(), priv->desc_id);
+  MSG_host_release_file_descriptor_id(MSG_host_self(), priv->desc_id);
   xbt_lib_unset(file_lib, name, MSG_FILE_LEVEL, 1);
   xbt_free(name);
   return res;
@@ -587,3 +608,5 @@ const char *MSG_storage_get_host(msg_storage_t storage) {
   msg_storage_priv_t priv = MSG_storage_priv(storage);
   return priv->hostname;
 }
+
+SG_END_DECL()