X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/178d9ca3560ec4b1e756970b888b4e36212ce670..d155fd69fa99c97b3a9c86bb7f2e472c2e7332df:/src/simdag/sd_workstation.c

diff --git a/src/simdag/sd_workstation.c b/src/simdag/sd_workstation.c
index 48d24796f1..f961c7f12b 100644
--- a/src/simdag/sd_workstation.c
+++ b/src/simdag/sd_workstation.c
@@ -1,26 +1,40 @@
+/* Copyright (c) 2006-2011. 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 "private.h"
 #include "simdag/simdag.h"
 #include "xbt/dict.h"
+#include "xbt/lib.h"
 #include "xbt/sysdep.h"
 #include "surf/surf.h"
+#include "surf/surf_resource.h"
+
+
+
+XBT_LOG_NEW_DEFAULT_SUBCATEGORY(sd_workstation, sd,
+                                "Logging specific to SimDag (workstation)");
 
 /* Creates a workstation and registers it in SD.
  */
-SD_workstation_t __SD_workstation_create(void *surf_workstation, void *data) {
-  SD_CHECK_INIT_DONE();
-  xbt_assert0(surf_workstation != NULL, "surf_workstation is NULL !");
+SD_workstation_t __SD_workstation_create(void *surf_workstation,
+                                         void *data)
+{
+
+  SD_workstation_priv_t workstation;
+  const char *name;
 
-  SD_workstation_t workstation = xbt_new(s_SD_workstation_t, 1);
-  workstation->surf_workstation = surf_workstation;
-  workstation->data = data; /* user data */
-  SD_workstation_set_access_mode(workstation, SD_WORKSTATION_SHARED_ACCESS); /* default mode is shared */
+  workstation = xbt_new(s_SD_workstation_priv_t, 1);
+  workstation->data = data;     /* user data */
+  workstation->access_mode = SD_WORKSTATION_SHARED_ACCESS;      /* default mode is shared */
   workstation->task_fifo = NULL;
-  
-  const char *name = SD_workstation_get_name(workstation);
-  xbt_dict_set(sd_global->workstations, name, workstation, __SD_workstation_destroy); /* add the workstation to the dictionary */
-  sd_global->workstation_count++;
+  workstation->current_task = NULL;
 
-  return workstation;
+  name = surf_resource_name(surf_workstation);
+  xbt_lib_set(host_lib,name,SD_HOST_LEVEL,workstation);
+  return xbt_lib_get_elm_or_null(host_lib,name);
 }
 
 /**
@@ -31,12 +45,9 @@ SD_workstation_t __SD_workstation_create(void *surf_workstation, void *data) {
  * \param name workstation name
  * \return the workstation, or \c NULL if there is no such workstation
  */
-SD_workstation_t SD_workstation_get_by_name(const char *name) {
-  SD_CHECK_INIT_DONE();
-
-  xbt_assert0(name != NULL, "Invalid parameter");
-
-  return xbt_dict_get_or_null(sd_global->workstations, name);
+SD_workstation_t SD_workstation_get_by_name(const char *name)
+{
+  return xbt_lib_get_elm_or_null(host_lib, name);
 }
 
 /**
@@ -47,21 +58,24 @@ SD_workstation_t SD_workstation_get_by_name(const char *name) {
  * \return an array of \ref SD_workstation_t containing all workstations
  * \see SD_workstation_get_number()
  */
-const SD_workstation_t* SD_workstation_get_list(void) {
-  SD_CHECK_INIT_DONE();
-  xbt_assert0(SD_workstation_get_number() > 0, "There is no workstation!");
+const SD_workstation_t *SD_workstation_get_list(void)
+{
 
-  xbt_dict_cursor_t cursor;
+  xbt_lib_cursor_t cursor;
   char *key;
-  void *data;
+  void **data;
   int i;
 
-  if (sd_global->workstation_list == NULL) { /* this is the first time the function is called */
-    sd_global->workstation_list = xbt_new(SD_workstation_t, sd_global->workstation_count);
-  
+  xbt_assert(SD_workstation_get_number() > 0, "There is no workstation!");
+
+  if (sd_global->workstation_list == NULL) {    /* this is the first time the function is called */
+    sd_global->workstation_list =
+      xbt_new(SD_workstation_t, xbt_lib_length(host_lib));
+
     i = 0;
-    xbt_dict_foreach(sd_global->workstations, cursor, key, data) {
-      sd_global->workstation_list[i++] = (SD_workstation_t) data;
+    xbt_lib_foreach(host_lib, cursor, key, data) {
+      if(data[SD_HOST_LEVEL])
+        sd_global->workstation_list[i++] = xbt_dict_cursor_get_elm(cursor);
     }
   }
   return sd_global->workstation_list;
@@ -73,9 +87,9 @@ const SD_workstation_t* SD_workstation_get_list(void) {
  * \return the number of existing workstations
  * \see SD_workstation_get_list()
  */
-int SD_workstation_get_number(void) {
-  SD_CHECK_INIT_DONE();
-  return sd_global->workstation_count;
+int SD_workstation_get_number(void)
+{
+  return xbt_lib_length(host_lib);
 }
 
 /**
@@ -85,10 +99,9 @@ int SD_workstation_get_number(void) {
  * \return the user data associated with this workstation (can be \c NULL)
  * \see SD_workstation_set_data()
  */
-void* SD_workstation_get_data(SD_workstation_t workstation) {
-  SD_CHECK_INIT_DONE();
-  xbt_assert0(workstation != NULL, "Invalid parameter");
-  return workstation->data;
+void *SD_workstation_get_data(SD_workstation_t workstation)
+{
+  return SD_workstation_priv(workstation)->data;
 }
 
 /**
@@ -101,10 +114,9 @@ void* SD_workstation_get_data(SD_workstation_t workstation) {
  * \param data the new data you want to associate with this workstation
  * \see SD_workstation_get_data()
  */
-void SD_workstation_set_data(SD_workstation_t workstation, void *data) {
-  SD_CHECK_INIT_DONE();
-  xbt_assert0(workstation != NULL, "Invalid parameter");
-  workstation->data = data;
+void SD_workstation_set_data(SD_workstation_t workstation, void *data)
+{
+  SD_workstation_priv(workstation)->data = data;
 }
 
 /**
@@ -113,10 +125,73 @@ void SD_workstation_set_data(SD_workstation_t workstation, void *data) {
  * \param workstation a workstation
  * \return the name of this workstation (cannot be \c NULL)
  */
-const char* SD_workstation_get_name(SD_workstation_t workstation) {
-  SD_CHECK_INIT_DONE();
-  xbt_assert0(workstation != NULL, "Invalid parameter");
-  return surf_workstation_resource->common_public->get_resource_name(workstation->surf_workstation);
+const char *SD_workstation_get_name(SD_workstation_t workstation)
+{
+  return sg_host_name(workstation);
+}
+
+/**
+ * \brief Returns the value of a given workstation property
+ *
+ * \param ws a workstation
+ * \param name a property name
+ * \return value of a property (or NULL if property not set)
+ */
+const char *SD_workstation_get_property_value(SD_workstation_t ws,
+                                              const char *name)
+{
+  return xbt_dict_get_or_null(SD_workstation_get_properties(ws), name);
+}
+
+
+/**
+ * \brief Returns a #xbt_dict_t consisting of the list of properties assigned to this workstation
+ *
+ * \param workstation a workstation
+ * \return the dictionary containing the properties associated with the workstation
+ */
+xbt_dict_t SD_workstation_get_properties(SD_workstation_t workstation)
+{
+  return surf_workstation_model->extension.
+      workstation.get_properties(surf_workstation_resource_priv(workstation));
+}
+
+
+/** @brief Displays debugging informations about a workstation */
+void SD_workstation_dump(SD_workstation_t ws)
+{
+  xbt_dict_t props;
+  xbt_dict_cursor_t cursor=NULL;
+  char *key,*data;
+  SD_task_t task = NULL;
+  
+  XBT_INFO("Displaying workstation %s", SD_workstation_get_name(ws));
+  XBT_INFO("  - power: %.0f", SD_workstation_get_power(ws));
+  XBT_INFO("  - available power: %.2f", SD_workstation_get_available_power(ws));
+  switch (SD_workstation_priv(ws)->access_mode){
+  case SD_WORKSTATION_SHARED_ACCESS:
+      XBT_INFO("  - access mode: Space shared");
+      break;
+  case SD_WORKSTATION_SEQUENTIAL_ACCESS:
+      XBT_INFO("  - access mode: Exclusive");
+    task = SD_workstation_get_current_task(ws);
+    if(task)
+      XBT_INFO("    current running task: %s",
+               SD_task_get_name(task));
+    else
+      XBT_INFO("    no task running");
+      break;
+  default: break;
+  }
+  props = SD_workstation_get_properties(ws);
+  
+  if (!xbt_dict_is_empty(props)){
+    XBT_INFO("  - properties:");
+
+    xbt_dict_foreach(props,cursor,key,data) {
+      XBT_INFO("    %s->%s",key,data);
+    }
+  }
 }
 
 /**
@@ -129,27 +204,32 @@ const char* SD_workstation_get_name(SD_workstation_t workstation) {
  * \return a new array of \ref SD_link_t representating the route between these two workstations
  * \see SD_route_get_size(), SD_link_t
  */
-const SD_link_t* SD_route_get_list(SD_workstation_t src, SD_workstation_t dst) {
-  SD_CHECK_INIT_DONE();
+const SD_link_t *SD_route_get_list(SD_workstation_t src,
+                                   SD_workstation_t dst)
+{
+  void *surf_src;
+  void *surf_dst;
+  xbt_dynar_t surf_route;
+  const char *link_name;
+  void *surf_link;
+  unsigned int cpt;
 
   if (sd_global->recyclable_route == NULL) {
     /* first run */
     sd_global->recyclable_route = xbt_new(SD_link_t, SD_link_get_number());
   }
 
-  void *surf_src = src->surf_workstation;
-  void *surf_dst = dst->surf_workstation;
-
-  const void **surf_route = surf_workstation_resource->extension_public->get_route(surf_src, surf_dst);
-  int route_size = surf_workstation_resource->extension_public->get_route_size(surf_src, surf_dst);
+  surf_src = src;
+  surf_dst = dst;
+  surf_route =
+      surf_workstation_model->extension.workstation.get_route(surf_src,
+                                                              surf_dst);
 
-  const char *link_name;
-  int i;
-  for (i = 0; i < route_size; i++) {
-    link_name = surf_workstation_resource->extension_public->get_link_name(surf_route[i]);
-    sd_global->recyclable_route[i] = xbt_dict_get(sd_global->links, link_name);
+  xbt_dynar_foreach(surf_route, cpt, surf_link) {
+    link_name = surf_resource_name(surf_link);
+    sd_global->recyclable_route[cpt] =
+        xbt_lib_get_or_null(link_lib, link_name, SD_LINK_LEVEL);
   }
-
   return sd_global->recyclable_route;
 }
 
@@ -161,10 +241,10 @@ const SD_link_t* SD_route_get_list(SD_workstation_t src, SD_workstation_t dst) {
  * \return the number of links on the route between these two workstations
  * \see SD_route_get_list()
  */
-int SD_route_get_size(SD_workstation_t src, SD_workstation_t dst) {
-  SD_CHECK_INIT_DONE();
-  return surf_workstation_resource->extension_public->
-    get_route_size(src->surf_workstation, dst->surf_workstation);
+int SD_route_get_size(SD_workstation_t src, SD_workstation_t dst)
+{
+  return xbt_dynar_length(surf_workstation_model->extension.
+                          workstation.get_route(src, dst));
 }
 
 /**
@@ -174,10 +254,10 @@ int SD_route_get_size(SD_workstation_t src, SD_workstation_t dst) {
  * \return the total power of this workstation
  * \see SD_workstation_get_available_power()
  */
-double SD_workstation_get_power(SD_workstation_t workstation) {
-  SD_CHECK_INIT_DONE();
-  xbt_assert0(workstation != NULL, "Invalid parameter");
-  return surf_workstation_resource->extension_public->get_speed(workstation->surf_workstation, 1.0);
+double SD_workstation_get_power(SD_workstation_t workstation)
+{
+  return surf_workstation_model->extension.workstation.
+      get_speed(workstation, 1.0);
 }
 
 /**
@@ -187,10 +267,10 @@ double SD_workstation_get_power(SD_workstation_t workstation) {
  * \return the proportion of power currently available in this workstation (normally a number between 0 and 1)
  * \see SD_workstation_get_power()
  */
-double SD_workstation_get_available_power(SD_workstation_t workstation) {
-  SD_CHECK_INIT_DONE();
-  xbt_assert0(workstation != NULL, "Invalid parameter");
-  return surf_workstation_resource->extension_public->get_available_speed(workstation->surf_workstation);
+double SD_workstation_get_available_power(SD_workstation_t workstation)
+{
+  return surf_workstation_model->extension.
+      workstation.get_available_speed(workstation);
 }
 
 /**
@@ -200,15 +280,16 @@ double SD_workstation_get_available_power(SD_workstation_t workstation) {
  * \param computation_amount the computation amount you want to evaluate (in flops)
  * \return an approximative astimated computation time for the given computation amount on this workstation (in seconds)
  */
-double SD_workstation_get_computation_time(SD_workstation_t workstation, double computation_amount) {
-  SD_CHECK_INIT_DONE();
-  xbt_assert0(workstation != NULL, "Invalid parameter");
-  xbt_assert0(computation_amount >= 0, "computation_amount must be greater than or equal to zero");
+double SD_workstation_get_computation_time(SD_workstation_t workstation,
+                                           double computation_amount)
+{
+  xbt_assert(computation_amount >= 0,
+              "computation_amount must be greater than or equal to zero");
   return computation_amount / SD_workstation_get_power(workstation);
 }
 
 /**
- * \brief Returns the latency of the route between two workstations, i.e. the sum of all link latencies
+ * \brief Returns the latency of the route between two workstations, i.e. the sum of all link latencies
  * between the workstations.
  *
  * \param src the first workstation
@@ -216,14 +297,19 @@ double SD_workstation_get_computation_time(SD_workstation_t workstation, double
  * \return the latency of the route between the two workstations (in seconds)
  * \see SD_route_get_current_bandwidth()
  */
-double SD_route_get_current_latency(SD_workstation_t src, SD_workstation_t dst) {
-  SD_CHECK_INIT_DONE();
-  xbt_assert0(src != NULL && dst != NULL, "Invalid parameter");
-  const SD_link_t *links = SD_route_get_list(src, dst);
-  int nb_links = SD_route_get_size(src, dst);
-  double latency = 0.0;
+double SD_route_get_current_latency(SD_workstation_t src,
+                                    SD_workstation_t dst)
+{
+
+  const SD_link_t *links;
+  int nb_links;
+  double latency;
   int i;
-  
+
+  links = SD_route_get_list(src, dst);
+  nb_links = SD_route_get_size(src, dst);
+  latency = 0.0;
+
   for (i = 0; i < nb_links; i++) {
     latency += SD_link_get_current_latency(links[i]);
   }
@@ -232,7 +318,7 @@ double SD_route_get_current_latency(SD_workstation_t src, SD_workstation_t dst)
 }
 
 /**
- * \brief Returns the bandwidth of the route between two workstations, i.e. the minimum link bandwidth of all
+ * \brief Returns the bandwidth of the route between two workstations, i.e. the minimum link bandwidth of all
  * between the workstations.
  *
  * \param src the first workstation
@@ -240,14 +326,21 @@ double SD_route_get_current_latency(SD_workstation_t src, SD_workstation_t dst)
  * \return the bandwidth of the route between the two workstations (in bytes/second)
  * \see SD_route_get_current_latency()
  */
-double SD_route_get_current_bandwidth(SD_workstation_t src, SD_workstation_t dst) {
-  SD_CHECK_INIT_DONE();
-  xbt_assert0(src != NULL && dst != NULL, "Invalid parameter");
-  const SD_link_t *links = SD_route_get_list(src, dst);
-  int nb_links = SD_route_get_size(src, dst);
-  double bandwidth, min_bandwidth = -1.0;
+double SD_route_get_current_bandwidth(SD_workstation_t src,
+                                      SD_workstation_t dst)
+{
+
+  const SD_link_t *links;
+  int nb_links;
+  double bandwidth;
+  double min_bandwidth;
   int i;
-  
+
+  links = SD_route_get_list(src, dst);
+  nb_links = SD_route_get_size(src, dst);
+  bandwidth = min_bandwidth = -1.0;
+
+
   for (i = 0; i < nb_links; i++) {
     bandwidth = SD_link_get_current_bandwidth(links[i]);
     if (bandwidth < min_bandwidth || min_bandwidth == -1.0)
@@ -267,20 +360,26 @@ double SD_route_get_current_bandwidth(SD_workstation_t src, SD_workstation_t dst
  * \return an approximative astimated computation time for the given communication amount
  * between the workstations (in seconds)
  */
-double SD_route_get_communication_time(SD_workstation_t src, SD_workstation_t dst,
-						   double communication_amount) {
+double SD_route_get_communication_time(SD_workstation_t src,
+                                       SD_workstation_t dst,
+                                       double communication_amount)
+{
+
+
   /* total time = latency + transmission time of the slowest link
      transmission time of a link = communication amount / link bandwidth */
-  SD_CHECK_INIT_DONE();
-  xbt_assert0(src != NULL && dst != NULL, "Invalid parameter");
-  xbt_assert0(communication_amount >= 0, "communication_amount must be greater than or equal to zero");
 
   const SD_link_t *links;
   int nb_links;
   double bandwidth, min_bandwidth;
   double latency;
   int i;
-  
+
+  xbt_assert(communication_amount >= 0,
+              "communication_amount must be greater than or equal to zero");
+
+
+
   if (communication_amount == 0.0)
     return 0.0;
 
@@ -308,16 +407,16 @@ double SD_route_get_communication_time(SD_workstation_t src, SD_workstation_t ds
  *
  * \see SD_workstation_set_access_mode(), e_SD_workstation_access_mode_t
  */
- e_SD_workstation_access_mode_t SD_workstation_get_access_mode(SD_workstation_t workstation) {
-  SD_CHECK_INIT_DONE();
-  xbt_assert0(workstation != NULL, "Invalid parameter");
-  return workstation->access_mode;
+e_SD_workstation_access_mode_t
+SD_workstation_get_access_mode(SD_workstation_t workstation)
+{
+  return SD_workstation_priv(workstation)->access_mode;
 }
 
 /**
  * \brief Sets the access mode for the tasks that will be executed on a workstation
  *
- * By default, a workstation resource is shared, i.e. several tasks
+ * By default, a workstation model is shared, i.e. several tasks
  * can be executed at the same time on a workstation. The CPU power of
  * the workstation is shared between the running tasks on the workstation.
  * In sequential mode, only one task can use the workstation, and the other
@@ -329,58 +428,112 @@ double SD_route_get_communication_time(SD_workstation_t src, SD_workstation_t ds
  *
  * \see SD_workstation_get_access_mode(), e_SD_workstation_access_mode_t
  */
-void SD_workstation_set_access_mode(SD_workstation_t workstation, e_SD_workstation_access_mode_t access_mode) {
-  SD_CHECK_INIT_DONE();
-  xbt_assert0(workstation != NULL, "Invalid parameter");
-
-  if (access_mode == workstation->access_mode) {
-    return; // nothing is changed
+void SD_workstation_set_access_mode(SD_workstation_t workstation,
+                                    e_SD_workstation_access_mode_t
+                                    access_mode)
+{
+  xbt_assert(access_mode != SD_WORKSTATION_SEQUENTIAL_ACCESS ||
+             access_mode != SD_WORKSTATION_SHARED_ACCESS,
+             "Trying to set an invalid access mode");
+
+  if (access_mode == SD_workstation_priv(workstation)->access_mode) {
+    return;                     // nothing is changed
   }
 
-  workstation->access_mode = access_mode;
+  SD_workstation_priv(workstation)->access_mode = access_mode;
 
   if (access_mode == SD_WORKSTATION_SHARED_ACCESS) {
-    xbt_fifo_free(workstation->task_fifo);
-    workstation->task_fifo = NULL;
-  }
-  else {
-    workstation->task_fifo = xbt_fifo_new();
+    xbt_fifo_free(SD_workstation_priv(workstation)->task_fifo);
+    SD_workstation_priv(workstation)->task_fifo = NULL;
+  } else {
+    SD_workstation_priv(workstation)->task_fifo = xbt_fifo_new();
   }
 }
 
-/* Returns whether a task can start now on a workstation.
- *//*
-int __SD_workstation_can_start(SD_workstation_t workstation, SD_task_t task) {
+/* Returns whether a task can start now on a workstation*/
+/*
+  int __SD_workstation_can_start(SD_workstation_t workstation, SD_task_t task) {
   SD_CHECK_INIT_DONE();
-  xbt_assert0(workstation != NULL && task != NULL, "Invalid parameter");
+  xbt_assert(workstation != NULL && task != NULL, "Invalid parameter");
 
   return !__SD_workstation_is_busy(workstation) &&
-    (xbt_fifo_size(workstation->task_fifo) == 0) || xbt_fifo_get_first_item(workstation->task_fifo) == task);
-}
+  (xbt_fifo_size(workstation->task_fifo) == 0) || xbt_fifo_get_first_item(workstation->task_fifo) == task);
+  }
 */
 
 /* Returns whether a workstation is busy. A workstation is busy is it is
  * in sequential mode and a task is running on it or the fifo is not empty.
  */
-int __SD_workstation_is_busy(SD_workstation_t workstation) {
-  SD_CHECK_INIT_DONE();
-  xbt_assert0(workstation != NULL, "Invalid parameter");
-  
-  return workstation->access_mode == SD_WORKSTATION_SEQUENTIAL_ACCESS &&
-    (workstation->current_task != NULL || xbt_fifo_size(workstation->task_fifo) > 0);
+int __SD_workstation_is_busy(SD_workstation_t workstation)
+{
+  XBT_DEBUG
+      ("Workstation '%s' access mode: '%s', current task: %s, fifo size: %d",
+       SD_workstation_get_name(workstation),
+       (SD_workstation_priv(workstation)->access_mode ==
+        SD_WORKSTATION_SHARED_ACCESS) ? "SHARED" : "FIFO",
+       (SD_workstation_priv(workstation)->current_task ?
+        SD_task_get_name(SD_workstation_priv(workstation)->current_task)
+        : "none"),
+       (SD_workstation_priv(workstation)->task_fifo ? xbt_fifo_size(SD_workstation_priv(workstation)->task_fifo) :
+        0));
+
+  return SD_workstation_priv(workstation)->access_mode == SD_WORKSTATION_SEQUENTIAL_ACCESS &&
+      (SD_workstation_priv(workstation)->current_task != NULL
+       || xbt_fifo_size(SD_workstation_priv(workstation)->task_fifo) > 0);
 }
 
 /* Destroys a workstation.
  */
-void __SD_workstation_destroy(void *workstation) {
-  SD_CHECK_INIT_DONE();
-  xbt_assert0(workstation != NULL, "Invalid parameter");
+void __SD_workstation_destroy(void *workstation)
+{
+
+  SD_workstation_priv_t w;
+
   /* workstation->surf_workstation is freed by surf_exit and workstation->data is freed by the user */
 
-  SD_workstation_t w = (SD_workstation_t) workstation;
+  w = (SD_workstation_priv_t) workstation;
 
   if (w->access_mode == SD_WORKSTATION_SEQUENTIAL_ACCESS) {
     xbt_fifo_free(w->task_fifo);
   }
   xbt_free(w);
 }
+
+/** 
+ * \brief Returns the kind of the task currently running on a workstation
+ * Only call this with sequential access mode set
+ * \param workstation a workstation */
+SD_task_t SD_workstation_get_current_task(SD_workstation_t workstation)
+{
+  xbt_assert(SD_workstation_priv(workstation)->access_mode == SD_WORKSTATION_SEQUENTIAL_ACCESS,
+              "Access mode must be set to SD_WORKSTATION_SEQUENTIAL_ACCESS"
+              " to use this function");
+
+  return (SD_workstation_priv(workstation)->current_task);
+}
+
+/**
+ * \brief Returns a #xbt_dict_t consisting of the list of properties assigned to the AS
+ * or router
+ *
+ * \param AS, router name
+ * \return the xbt_dict_t properties of the AS
+ */
+xbt_dict_t SD_as_router_get_properties(const char *asr)
+{
+  return get_as_router_properties(asr);
+}
+/**
+ * \brief Returns a #xbt_dict_t consisting of the list of properties assigned to the AS
+ * or router
+ *
+ * \param AS, router name
+ * \param The name of a properties
+ * \return value of the properties
+ */
+const char* SD_as_router_get_property_value(const char *asr, const char *name)
+{
+  xbt_dict_t dict = get_as_router_properties(asr);
+  if(!dict) return NULL;
+  return xbt_dict_get_or_null(dict,name);
+}