X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/2057d436f1e55c886a8dccaa1b623e7ae236e1ec..3d0ec27f4663316ce2c245e03d950a89f9e35957:/src/simix/smx_user.c

diff --git a/src/simix/smx_user.c b/src/simix/smx_user.c
index dc4fb54e0d..cf09a36865 100644
--- a/src/simix/smx_user.c
+++ b/src/simix/smx_user.c
@@ -1,23 +1,14 @@
 /* smx_user.c - public interface to simix                                   */
 
-/* Copyright (c) 2010, 2011. Da SimGrid team. All rights reserved.          */
+/* Copyright (c) 2010-2012. Da 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. */
-#ifndef _SVID_SOURCE
-#  define _SVID_SOURCE    /* strdup() */
-#endif
-#ifndef _ISOC99_SOURCE
-#  define _ISOC99_SOURCE  /* isfinite() */
-#endif
-#ifndef _ISO_C99_SOURCE
-#  define _ISO_C99_SOURCE /* isfinite() */
-#endif
-#include <math.h>         /* isfinite() */
 
 #include "smx_private.h"
 #include "mc/mc.h"
 #include "xbt/ex.h"
+#include <math.h>         /* isfinite() */
 
 XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(simix);
 
@@ -41,6 +32,8 @@ smx_host_t simcall_host_get_by_name(const char *name)
 
   simcall->call = SIMCALL_HOST_GET_BY_NAME;
   simcall->host_get_by_name.name = name;
+  if(MC_is_active()) /* Initialize result to NULL for snapshot comparison done during simcall */
+    simcall->host_get_by_name.result = NULL;
   SIMIX_simcall_push(simcall->issuer);
   return simcall->host_get_by_name.result;
 }
@@ -58,6 +51,8 @@ const char* simcall_host_get_name(smx_host_t host)
 
   simcall->call = SIMCALL_HOST_GET_NAME;
   simcall->host_get_name.host = host;
+  if(MC_is_active()) /* Initialize result to NULL for snapshot comparison done during simcall */
+    simcall->host_get_name.result = NULL;
   SIMIX_simcall_push(simcall->issuer);
   return simcall->host_get_name.result;
 }
@@ -75,10 +70,32 @@ xbt_dict_t simcall_host_get_properties(smx_host_t host)
 
   simcall->call = SIMCALL_HOST_GET_PROPERTIES;
   simcall->host_get_properties.host = host;
+  if(MC_is_active()) /* Initialize result to NULL for snapshot comparison done during simcall */
+    simcall->host_get_properties.result = NULL;
   SIMIX_simcall_push(simcall->issuer);
   return simcall->host_get_properties.result;
 }
 
+/**
+ * \ingroup simix_host_management
+ * \brief Returns a dict of the properties assigned to a router or AS.
+ *
+ * \param name The name of the router or AS
+ * \return The properties
+ */
+xbt_dict_t simcall_asr_get_properties(const char *name)
+{
+  smx_simcall_t simcall = SIMIX_simcall_mine();
+
+  simcall->call = SIMCALL_ASR_GET_PROPERTIES;
+  simcall->asr_get_properties.name = name;
+  if(MC_is_active()) /* Initialize result to NULL for snapshot comparison done during simcall */
+    simcall->asr_get_properties.result = NULL;
+  SIMIX_simcall_push(simcall->issuer);
+  return simcall->asr_get_properties.result;
+}
+
+
 /**
  * \ingroup simix_host_management
  * \brief Returns the speed of the processor.
@@ -93,6 +110,8 @@ double simcall_host_get_speed(smx_host_t host)
 
   simcall->call = SIMCALL_HOST_GET_SPEED;
   simcall->host_get_speed.host = host;
+  if(MC_is_active()) /* Initialize result to a default value for snapshot comparison done during simcall */
+    simcall->host_get_speed.result = 0.0;
   SIMIX_simcall_push(simcall->issuer);
   return simcall->host_get_speed.result;
 }
@@ -109,6 +128,8 @@ double simcall_host_get_available_speed(smx_host_t host)
 
   simcall->call = SIMCALL_HOST_GET_AVAILABLE_SPEED;
   simcall->host_get_available_speed.host = host;
+  if(MC_is_active()) /* Initialize result to a default value for snapshot comparison done during simcall */
+    simcall->host_get_available_speed.result = 0.0;
   SIMIX_simcall_push(simcall->issuer);
   return simcall->host_get_available_speed.result;
 }
@@ -127,6 +148,8 @@ int simcall_host_get_state(smx_host_t host)
 
   simcall->call = SIMCALL_HOST_GET_STATE;
   simcall->host_get_state.host = host;
+  if(MC_is_active()) /* Initialize result to a default value for snapshot comparison done during simcall */
+    simcall->host_get_state.result = -1;
   SIMIX_simcall_push(simcall->issuer);
   return simcall->host_get_state.result;
 }
@@ -144,6 +167,8 @@ void* simcall_host_get_data(smx_host_t host)
 
   simcall->call = SIMCALL_HOST_GET_DATA;
   simcall->host_get_data.host = host;
+  if(MC_is_active()) /* Initialize result to NULL for snapshot comparison done during simcall */
+    simcall->host_get_data.result = NULL;
   SIMIX_simcall_push(simcall->issuer);
   return simcall->host_get_data.result;
 }
@@ -153,7 +178,7 @@ void* simcall_host_get_data(smx_host_t host)
  * \brief Sets the user data associated to a host.
  *
  * The host must not have previous user data associated to it.
- * \param A host SIMIX host
+ * \param host A SIMIX host
  * \param data The user data to set
  */
 void simcall_host_set_data(smx_host_t host, void *data)
@@ -175,7 +200,8 @@ void simcall_host_set_data(smx_host_t host, void *data)
  *
  * \param name Name of the execution action to create
  * \param host SIMIX host where the action will be executed
- * \param amount Computation amount (in bytes)
+ * \param computation_amount amount Computation amount (in bytes)
+ * \param priority computation priority
  * \return A new SIMIX execution action
  */
 smx_action_t simcall_host_execute(const char *name, smx_host_t host,
@@ -193,6 +219,8 @@ smx_action_t simcall_host_execute(const char *name, smx_host_t host,
   simcall->host_execute.host = host;
   simcall->host_execute.computation_amount = computation_amount;
   simcall->host_execute.priority = priority;
+  if(MC_is_active()) /* Initialize result to NULL for snapshot comparison done during simcall */
+    simcall->host_execute.result = NULL;
   SIMIX_simcall_push(simcall->issuer);
   return simcall->host_execute.result;
 }
@@ -243,6 +271,8 @@ smx_action_t simcall_host_parallel_execute(const char *name,
   simcall->host_parallel_execute.communication_amount = communication_amount;
   simcall->host_parallel_execute.amount = amount;
   simcall->host_parallel_execute.rate = rate;
+  if(MC_is_active()) /* Initialize result to NULL for snapshot comparison done during simcall */
+    simcall->host_parallel_execute.result = NULL;
   SIMIX_simcall_push(simcall->issuer);
   return simcall->host_parallel_execute.result;
 }
@@ -252,7 +282,7 @@ smx_action_t simcall_host_parallel_execute(const char *name,
  * \brief Destroys an execution action.
  *
  * Destroys an action, freing its memory. This function cannot be called if there are a conditional waiting for it.
- * \param action The execution action to destroy
+ * \param execution The execution action to destroy
  */
 void simcall_host_execution_destroy(smx_action_t execution)
 {
@@ -268,7 +298,7 @@ void simcall_host_execution_destroy(smx_action_t execution)
  * \brief Cancels an execution action.
  *
  * This functions stops the execution. It calls a surf function.
- * \param action The execution action to cancel
+ * \param execution The execution action to cancel
  */
 void simcall_host_execution_cancel(smx_action_t execution)
 {
@@ -283,7 +313,7 @@ void simcall_host_execution_cancel(smx_action_t execution)
  * \ingroup simix_host_management
  * \brief Returns how much of an execution action remains to be done.
  *
- * \param Action The execution action
+ * \param execution The execution action
  * \return The remaining amount
  */
 double simcall_host_execution_get_remains(smx_action_t execution)
@@ -292,6 +322,8 @@ double simcall_host_execution_get_remains(smx_action_t execution)
 
   simcall->call = SIMCALL_HOST_EXECUTION_GET_REMAINS;
   simcall->host_execution_get_remains.execution = execution;
+  if(MC_is_active()) /* Initializeialize result to a default value for snapshot comparison done during simcall */
+    simcall->host_execution_get_remains.result = 0.0;
   SIMIX_simcall_push(simcall->issuer);
   return simcall->host_execution_get_remains.result;
 }
@@ -309,6 +341,7 @@ e_smx_state_t simcall_host_execution_get_state(smx_action_t execution)
 
   simcall->call = SIMCALL_HOST_EXECUTION_GET_STATE;
   simcall->host_execution_get_state.execution = execution;
+  simcall->host_execution_get_state.result = -1;
   SIMIX_simcall_push(simcall->issuer);
   return simcall->host_execution_get_state.result;
 }
@@ -346,6 +379,8 @@ e_smx_state_t simcall_host_execution_wait(smx_action_t execution)
 
   simcall->call = SIMCALL_HOST_EXECUTION_WAIT;
   simcall->host_execution_wait.execution = execution;
+  if(MC_is_active()) /* Initialize result to a default value for snapshot comparison done during simcall */
+    simcall->host_execution_wait.result = -1;
   SIMIX_simcall_push(simcall->issuer);
   return simcall->host_execution_wait.result;
 }
@@ -366,6 +401,7 @@ e_smx_state_t simcall_host_execution_wait(smx_action_t execution)
  * \param argc first argument passed to \a code
  * \param argv second argument passed to \a code
  * \param properties the properties of the process
+ * \param auto_restart either it is autorestarting or not.
  */
 void simcall_process_create(smx_process_t *process, const char *name,
                               xbt_main_func_t code,
@@ -442,7 +478,6 @@ void simcall_process_cleanup(smx_process_t process)
  * This function changes the value of the host on which \a process is running.
  *
  * \param process the process to migrate
- * \param source name of the previous host
  * \param dest name of the new host
  */
 void simcall_process_change_host(smx_process_t process, smx_host_t dest)
@@ -504,6 +539,8 @@ int simcall_process_count(void)
   smx_simcall_t simcall = SIMIX_simcall_mine();
 
   simcall->call = SIMCALL_PROCESS_COUNT;
+  if(MC_is_active()) /* Initialize result to a default value for snapshot comparison done during simcall */
+    simcall->process_count.result = -1;
   SIMIX_simcall_push(simcall->issuer);
   return simcall->process_count.result;
 }
@@ -525,6 +562,8 @@ void* simcall_process_get_data(smx_process_t process)
 
   simcall->call = SIMCALL_PROCESS_GET_DATA;
   simcall->process_get_data.process = process;
+  if(MC_is_active()) /* Initialize result to NULL for snapshot comparison done during simcall */
+    simcall->process_get_data.result = NULL;
   SIMIX_simcall_push(simcall->issuer);
   return simcall->process_get_data.result;
 }
@@ -533,7 +572,7 @@ void* simcall_process_get_data(smx_process_t process)
  * \ingroup simix_process_management
  * \brief Set the user data of a #smx_process_t.
  *
- * This functions checks whether \a process is a valid pointer or not and set the user data associated to \a process if it is possible.
+ * This functions sets the user data associated to \a process.
  * \param process SIMIX process
  * \param data User data
  */
@@ -576,7 +615,8 @@ void simcall_process_set_kill_time(smx_process_t process, double kill_time)
  * \ingroup simix_process_management
  * \brief Return the location on which an agent is running.
  *
- * This functions checks whether \a process is a valid pointer or not and return the m_host_t corresponding to the location on which \a process is running.
+ * This functions returns the smx_host_t corresponding to the location on which
+ * \a process is running.
  * \param process SIMIX process
  * \return SIMIX host
  */
@@ -586,6 +626,8 @@ smx_host_t simcall_process_get_host(smx_process_t process)
 
   simcall->call = SIMCALL_PROCESS_GET_HOST;
   simcall->process_get_host.process = process;
+  if(MC_is_active()) /* Initialize result to NULL for snapshot comparison done during simcall */
+    simcall->process_get_host.result = NULL;
   SIMIX_simcall_push(simcall->issuer);
   return simcall->process_get_host.result;
 }
@@ -609,6 +651,8 @@ const char* simcall_process_get_name(smx_process_t process)
 
   simcall->call = SIMCALL_PROCESS_GET_NAME;
   simcall->process_get_name.process = process;
+  if(MC_is_active()) /* Initialize result to NULL for snapshot comparison done during simcall */
+    simcall->process_get_name.result = NULL;
   SIMIX_simcall_push(simcall->issuer);
   return simcall->process_get_name.result;
 }
@@ -627,13 +671,14 @@ int simcall_process_is_suspended(smx_process_t process)
 
   simcall->call = SIMCALL_PROCESS_IS_SUSPENDED;
   simcall->process_is_suspended.process = process;
+  if(MC_is_active()) /* Initialize result to a default value for snapshot comparison done during simcall */
+    simcall->process_is_suspended.result = -1;
   SIMIX_simcall_push(simcall->issuer);
   return simcall->process_is_suspended.result;
 }
 
 /**
  * \ingroup simix_process_management
- * \ingroup m_process_management
  * \brief Return the properties
  *
  * This functions returns the properties associated with this process
@@ -644,6 +689,8 @@ xbt_dict_t simcall_process_get_properties(smx_process_t process)
 
   simcall->call = SIMCALL_PROCESS_GET_PROPERTIES;
   simcall->process_get_properties.process = process;
+  if(MC_is_active()) /* Initialize result to NULL for snapshot comparison done during simcall */
+    simcall->process_get_properties.result = NULL;
   SIMIX_simcall_push(simcall->issuer);
   return simcall->process_get_properties.result;
 }
@@ -652,7 +699,8 @@ xbt_dict_t simcall_process_get_properties(smx_process_t process)
  * \brief Add an on_exit function
  * Add an on_exit function which will be executed when the process exits/is killed.
  */
-XBT_PUBLIC(void) simcall_process_on_exit(smx_process_t process, int_f_pvoid_t fun, void *data) {
+XBT_PUBLIC(void) simcall_process_on_exit(smx_process_t process, int_f_pvoid_t fun, void *data)
+{
   smx_simcall_t simcall = SIMIX_simcall_mine();
 
   simcall->call = SIMCALL_PROCESS_ON_EXIT;
@@ -668,7 +716,8 @@ XBT_PUBLIC(void) simcall_process_on_exit(smx_process_t process, int_f_pvoid_t fu
  * Will restart the process when the host comes back up if auto_restart is set to 1.
  */
 
-XBT_PUBLIC(void) simcall_process_auto_restart_set(smx_process_t process, int auto_restart) {
+XBT_PUBLIC(void) simcall_process_auto_restart_set(smx_process_t process, int auto_restart)
+{
   smx_simcall_t simcall = SIMIX_simcall_mine();
 
   simcall->call = SIMCALL_PROCESS_AUTO_RESTART_SET;
@@ -677,6 +726,24 @@ XBT_PUBLIC(void) simcall_process_auto_restart_set(smx_process_t process, int aut
 
   SIMIX_simcall_push(simcall->issuer);
 }
+
+/**
+ * \ingroup simix_process_management
+ * \brief Restarts the process, killing it and starting it again from scratch.
+ */
+XBT_PUBLIC(smx_process_t) simcall_process_restart(smx_process_t process)
+{
+  smx_simcall_t simcall = SIMIX_simcall_mine();
+
+  simcall->call = SIMCALL_PROCESS_RESTART;
+  simcall->process_restart.process = process;
+  if(MC_is_active()) /* Initialize result to NULL for snapshot comparison done during simcall */
+    simcall->process_restart.result = NULL;
+
+  SIMIX_simcall_push(simcall->issuer);
+
+  return simcall->process_restart.result;
+}
 /**
  * \ingroup simix_process_management
  * \brief Creates a new sleep SIMIX action.
@@ -697,6 +764,8 @@ e_smx_state_t simcall_process_sleep(double duration)
 
   simcall->call = SIMCALL_PROCESS_SLEEP;
   simcall->process_sleep.duration = duration;
+  if(MC_is_active()) /* Initialize result to a default value for snapshot comparison done during simcall */
+    simcall->process_sleep.result = -1;
   SIMIX_simcall_push(simcall->issuer);
   return simcall->process_sleep.result;
 }
@@ -713,6 +782,8 @@ smx_rdv_t simcall_rdv_create(const char *name)
 
   simcall->call = SIMCALL_RDV_CREATE;
   simcall->rdv_create.name = name;
+  if(MC_is_active()) /* Initialize result to NULL for snapshot comparison done during simcall */
+    simcall->rdv_create.result = NULL;
 
   SIMIX_simcall_push(simcall->issuer);
   return simcall->rdv_create.result;
@@ -722,7 +793,7 @@ smx_rdv_t simcall_rdv_create(const char *name)
 /**
  *  \ingroup simix_rdv_management
  *  \brief Destroy a rendez-vous point
- *  \param name The rendez-vous point to destroy
+ *  \param rdv The rendez-vous point to destroy
  */
 void simcall_rdv_destroy(smx_rdv_t rdv)
 {
@@ -770,6 +841,8 @@ int simcall_rdv_comm_count_by_host(smx_rdv_t rdv, smx_host_t host)
   simcall->call = SIMCALL_RDV_COMM_COUNT_BY_HOST;
   simcall->rdv_comm_count_by_host.rdv = rdv;
   simcall->rdv_comm_count_by_host.host = host;
+  if(MC_is_active()) /* Initialize result to a default value for snapshot comparison done during simcall */
+    simcall->rdv_comm_count_by_host.result = -1;
 
   SIMIX_simcall_push(simcall->issuer);
   return simcall->rdv_comm_count_by_host.result;
@@ -787,13 +860,39 @@ smx_action_t simcall_rdv_get_head(smx_rdv_t rdv)
 
   simcall->call = SIMCALL_RDV_GET_HEAD;
   simcall->rdv_get_head.rdv = rdv;
+  if(MC_is_active()) /* Initialize result to NULL for snapshot comparison done during simcall */
+    simcall->rdv_get_head.result = NULL;
 
   SIMIX_simcall_push(simcall->issuer);
   return simcall->rdv_get_head.result;
 }
+
+void simcall_rdv_set_receiver(smx_rdv_t rdv , smx_process_t process)
+{
+  smx_simcall_t simcall = SIMIX_simcall_mine();
+
+  simcall->call = SIMCALL_RDV_SET_RECV;
+  simcall->rdv_set_rcv_proc.rdv = rdv;
+  simcall->rdv_set_rcv_proc.receiver = process;
+
+  SIMIX_simcall_push(simcall->issuer);
+}
+
+smx_process_t simcall_rdv_get_receiver(smx_rdv_t rdv)
+{
+  smx_simcall_t simcall = SIMIX_simcall_mine();
+
+  simcall->call = SIMCALL_RDV_GET_RECV;
+  simcall->rdv_get_rcv_proc.rdv = rdv;
+  if(MC_is_active()) /* Initialize result to NULL for snapshot comparison done during simcall */
+    simcall->rdv_get_rcv_proc.result = NULL;
+
+  SIMIX_simcall_push(simcall->issuer);
+  return simcall->rdv_get_rcv_proc.result;
+}
+
 /**
  * \ingroup simix_comm_management
- *
  */
 void simcall_comm_send(smx_rdv_t rdv, double task_size, double rate,
                          void *src_buff, size_t src_buff_size,
@@ -807,7 +906,7 @@ void simcall_comm_send(smx_rdv_t rdv, double task_size, double rate,
   
   xbt_assert(rdv, "No rendez-vous point defined for send");
 
-  if (MC_IS_ENABLED) {
+  if (MC_is_active()) {
     /* the model-checker wants two separate simcalls */
     smx_action_t comm = simcall_comm_isend(rdv, task_size, rate,
         src_buff, src_buff_size, match_fun, NULL, data, 0);
@@ -857,6 +956,8 @@ smx_action_t simcall_comm_isend(smx_rdv_t rdv, double task_size, double rate,
   simcall->comm_isend.clean_fun = clean_fun;
   simcall->comm_isend.data = data;
   simcall->comm_isend.detached = detached;
+  if(MC_is_active()) /* Initialize result to NULL for snapshot comparison done during simcall */
+    simcall->comm_isend.result = NULL;
 
   SIMIX_simcall_push(simcall->issuer);
   return simcall->comm_isend.result;
@@ -870,7 +971,7 @@ void simcall_comm_recv(smx_rdv_t rdv, void *dst_buff, size_t * dst_buff_size,
   xbt_assert(isfinite(timeout), "timeout is not finite!");
   xbt_assert(rdv, "No rendez-vous point defined for recv");
 
-  if (MC_IS_ENABLED) {
+  if (MC_is_active()) {
     /* the model-checker wants two separate simcalls */
     smx_action_t comm = simcall_comm_irecv(rdv, dst_buff, dst_buff_size,
         match_fun, data);
@@ -906,10 +1007,36 @@ smx_action_t simcall_comm_irecv(smx_rdv_t rdv, void *dst_buff, size_t * dst_buff
   simcall->comm_irecv.dst_buff_size = dst_buff_size;
   simcall->comm_irecv.match_fun = match_fun;
   simcall->comm_irecv.data = data;
+  if(MC_is_active()) /* Initialize result to NULL for snapshot comparison done during simcall */
+    simcall->comm_irecv.result = NULL;
 
   SIMIX_simcall_push(simcall->issuer);
   return simcall->comm_irecv.result;
 }
+
+
+/**
+ * \ingroup simix_comm_management
+ */
+smx_action_t simcall_comm_iprobe(smx_rdv_t rdv, int src, int tag,
+                                int (*match_fun)(void *, void *, smx_action_t), void *data)
+{
+  xbt_assert(rdv, "No rendez-vous point defined for iprobe");
+
+  smx_simcall_t simcall = SIMIX_simcall_mine();
+
+  simcall->call = SIMCALL_COMM_IPROBE;
+  simcall->comm_iprobe.rdv = rdv;
+  simcall->comm_iprobe.src = src;
+  simcall->comm_iprobe.match_fun = match_fun;
+  simcall->comm_iprobe.data = data;
+  if(MC_is_active()) /* Initialize result to NULL for snapshot comparison done during simcall */
+    simcall->comm_iprobe.result = NULL;
+  SIMIX_simcall_push(simcall->issuer);
+  return simcall->comm_iprobe.result;
+}
+
+
 void simcall_comm_destroy(smx_action_t comm)
 {
   xbt_assert(comm, "Invalid parameter");
@@ -946,6 +1073,8 @@ unsigned int simcall_comm_waitany(xbt_dynar_t comms)
 
   simcall->call = SIMCALL_COMM_WAITANY;
   simcall->comm_waitany.comms = comms;
+  if(MC_is_active()) /* Initialize result to a default value for snapshot comparison done during simcall */
+    simcall->comm_waitany.result = -1;
 
   SIMIX_simcall_push(simcall->issuer);
   return simcall->comm_waitany.result;
@@ -961,6 +1090,8 @@ int simcall_comm_testany(xbt_dynar_t comms)
 
   simcall->call = SIMCALL_COMM_TESTANY;
   simcall->comm_testany.comms = comms;
+    if(MC_is_active()) /* Initialize result to a default value for snapshot comparison done during simcall */
+      simcall->comm_testany.result = -1;
 
   SIMIX_simcall_push(simcall->issuer);
   return simcall->comm_testany.result;
@@ -1014,6 +1145,8 @@ int simcall_comm_test(smx_action_t comm)
 
   simcall->call = SIMCALL_COMM_TEST;
   simcall->comm_test.comm = comm;
+  if(MC_is_active()) /* Initialize result to a default value for snapshot comparison done during simcall */
+    simcall->comm_test.result = -1;
 
   SIMIX_simcall_push(simcall->issuer);
   return simcall->comm_test.result;
@@ -1028,6 +1161,8 @@ double simcall_comm_get_remains(smx_action_t comm)
 
   simcall->call = SIMCALL_COMM_GET_REMAINS;
   simcall->comm_get_remains.comm = comm;
+  if(MC_is_active()) /* Initialize result to a default value for snapshot comparison done during simcall */
+    simcall->comm_get_remains.result = 0.0;
 
   SIMIX_simcall_push(simcall->issuer);
   return simcall->comm_get_remains.result;
@@ -1042,6 +1177,8 @@ e_smx_state_t simcall_comm_get_state(smx_action_t comm)
 
   simcall->call = SIMCALL_COMM_GET_STATE;
   simcall->comm_get_state.comm = comm;
+  if(MC_is_active()) /* Initialize result to a default value for snapshot comparison done during simcall */
+    simcall->comm_get_state.result = -1;
 
   SIMIX_simcall_push(simcall->issuer);
   return simcall->comm_get_state.result;
@@ -1056,6 +1193,8 @@ void *simcall_comm_get_src_data(smx_action_t comm)
 
   simcall->call = SIMCALL_COMM_GET_SRC_DATA;
   simcall->comm_get_src_data.comm = comm;
+  if(MC_is_active()) /* Initialize result to NULL for snapshot comparison done during simcall */
+    simcall->comm_get_src_data.result = NULL;
 
   SIMIX_simcall_push(simcall->issuer);
   return simcall->comm_get_src_data.result;
@@ -1070,6 +1209,8 @@ void *simcall_comm_get_dst_data(smx_action_t comm)
 
   simcall->call = SIMCALL_COMM_GET_DST_DATA;
   simcall->comm_get_dst_data.comm = comm;
+  if(MC_is_active()) /* Initialize result to NULL for snapshot comparison done during simcall */
+    simcall->comm_get_dst_data.result = NULL;
 
   SIMIX_simcall_push(simcall->issuer);
   return simcall->comm_get_dst_data.result;
@@ -1084,6 +1225,8 @@ smx_process_t simcall_comm_get_src_proc(smx_action_t comm)
 
   simcall->call = SIMCALL_COMM_GET_SRC_PROC;
   simcall->comm_get_src_proc.comm = comm;
+  if(MC_is_active()) /* Initialize result to NULL for snapshot comparison done during simcall */
+    simcall->comm_get_src_proc.result = NULL;
 
   SIMIX_simcall_push(simcall->issuer);
   return simcall->comm_get_src_proc.result;
@@ -1098,6 +1241,8 @@ smx_process_t simcall_comm_get_dst_proc(smx_action_t comm)
 
   simcall->call = SIMCALL_COMM_GET_DST_PROC;
   simcall->comm_get_dst_proc.comm = comm;
+  if(MC_is_active()) /* Initialize result to NULL for snapshot comparison done during simcall */
+    simcall->comm_get_dst_proc.result = NULL;
 
   SIMIX_simcall_push(simcall->issuer);
   return simcall->comm_get_dst_proc.result;
@@ -1110,6 +1255,8 @@ int simcall_comm_is_latency_bounded(smx_action_t comm)
 
   simcall->call = SIMCALL_COMM_IS_LATENCY_BOUNDED;
   simcall->comm_is_latency_bounded.comm = comm;
+  if(MC_is_active()) /* Initialize result to a default value for snapshot comparison done during simcall */
+    simcall->comm_is_latency_bounded.result = -1;
 
   SIMIX_simcall_push(simcall->issuer);
   return simcall->comm_is_latency_bounded.result;
@@ -1122,12 +1269,14 @@ int simcall_comm_is_latency_bounded(smx_action_t comm)
 smx_mutex_t simcall_mutex_init(void)
 {
   if(!simix_global) {
-    fprintf(stderr,"You must run MSG_init or gras_init before using MSG or GRAS\n"); // I would have loved using xbt_die but I can't since it is not initialized yet... :)
-    abort();
+    fprintf(stderr,"You must run MSG_init before using MSG\n"); // We can't use xbt_die since we may get there before the initialization
+    xbt_abort();
   }
   smx_simcall_t simcall = SIMIX_simcall_mine();
 
   simcall->call = SIMCALL_MUTEX_INIT;
+  if(MC_is_active()) /* Initialize result to NULL for snapshot comparison done during simcall */
+    simcall->mutex_init.result = NULL;
 
   SIMIX_simcall_push(simcall->issuer);
   return simcall->mutex_init.result;
@@ -1168,6 +1317,8 @@ int simcall_mutex_trylock(smx_mutex_t mutex)
 
   simcall->call = SIMCALL_MUTEX_TRYLOCK;
   simcall->mutex_trylock.mutex = mutex;
+  if(MC_is_active()) /* Initialize result to a default value for snapshot comparison done during simcall */
+    simcall->mutex_trylock.result = -1;
 
   SIMIX_simcall_push(simcall->issuer);
   return simcall->mutex_trylock.result;
@@ -1194,6 +1345,8 @@ smx_cond_t simcall_cond_init(void)
   smx_simcall_t simcall = SIMIX_simcall_mine();
 
   simcall->call = SIMCALL_COND_INIT;
+  if(MC_is_active()) /* Initialize result to NULL for snapshot comparison done during simcall */
+    simcall->cond_init.result = NULL;
 
   SIMIX_simcall_push(simcall->issuer);
   return simcall->cond_init.result;
@@ -1280,6 +1433,8 @@ smx_sem_t simcall_sem_init(int capacity)
 
   simcall->call = SIMCALL_SEM_INIT;
   simcall->sem_init.capacity = capacity;
+  if(MC_is_active()) /* Initialize result to NULL for snapshot comparison done during simcall */
+    simcall->sem_init.result = NULL;
 
   SIMIX_simcall_push(simcall->issuer);
   return simcall->sem_init.result;
@@ -1320,6 +1475,8 @@ int simcall_sem_would_block(smx_sem_t sem)
 
   simcall->call = SIMCALL_SEM_WOULD_BLOCK;
   simcall->sem_would_block.sem = sem;
+  if(MC_is_active()) /* Initialize result to a default value for snapshot comparison done during simcall */
+    simcall->sem_would_block.result = -1;
 
   SIMIX_simcall_push(simcall->issuer);
   return simcall->sem_would_block.result;
@@ -1363,6 +1520,8 @@ int simcall_sem_get_capacity(smx_sem_t sem)
 
   simcall->call = SIMCALL_SEM_GET_CAPACITY;
   simcall->sem_get_capacity.sem = sem;
+  if(MC_is_active()) /* Initialize result to a default value for snapshot comparison done during simcall */
+    simcall->sem_get_capacity.result = -1;
 
   SIMIX_simcall_push(simcall->issuer);
   return simcall->sem_get_capacity.result;
@@ -1380,6 +1539,8 @@ double simcall_file_read(void* ptr, size_t size, size_t nmemb, smx_file_t stream
   simcall->file_read.size = size;
   simcall->file_read.nmemb = nmemb;
   simcall->file_read.stream = stream;
+  if(MC_is_active()) /* Initialize result to a default value for snapshot comparison done during simcall */
+    simcall->file_read.result = 0.0;
   SIMIX_simcall_push(simcall->issuer);
 
   return simcall->file_read.result;
@@ -1397,13 +1558,15 @@ size_t simcall_file_write(const void* ptr, size_t size, size_t nmemb, smx_file_t
   simcall->file_write.size = size;
   simcall->file_write.nmemb = nmemb;
   simcall->file_write.stream = stream;
+  if(MC_is_active()) /* Initialize result to a default value for snapshot comparison done during simcall */
+    simcall->file_write.result = 0;
   SIMIX_simcall_push(simcall->issuer);
 
   return simcall->file_write.result;
 }
 /**
  * \ingroup simix_file_management
- *
+ * \brief
  */
 smx_file_t simcall_file_open(const char* mount, const char* path, const char* mode)
 {
@@ -1413,6 +1576,8 @@ smx_file_t simcall_file_open(const char* mount, const char* path, const char* mo
   simcall->file_open.mount = mount;
   simcall->file_open.path = path;
   simcall->file_open.mode = mode;
+  if(MC_is_active()) /* Initialize result to NULL for snapshot comparison done during simcall */
+    simcall->file_open.result = NULL;
   SIMIX_simcall_push(simcall->issuer);
 
   return simcall->file_open.result;
@@ -1427,6 +1592,8 @@ int simcall_file_close(smx_file_t fp)
 
   simcall->call = SIMCALL_FILE_CLOSE;
   simcall->file_close.fp = fp;
+  if(MC_is_active()) /* Initialize result to a default value for snapshot comparison done during simcall */
+    simcall->file_close.result = -1;
   SIMIX_simcall_push(simcall->issuer);
 
   return simcall->file_close.result;
@@ -1440,6 +1607,8 @@ int simcall_file_stat(smx_file_t fd, s_file_stat_t *buf)
   smx_simcall_t simcall = SIMIX_simcall_mine();
   simcall->call = SIMCALL_FILE_STAT;
   simcall->file_stat.fd = fd;
+  if(MC_is_active()) /* Initialize result to a default value for snapshot comparison done during simcall */
+    simcall->file_stat.result = -1;
 
   SIMIX_simcall_push(simcall->issuer);
 
@@ -1448,6 +1617,84 @@ int simcall_file_stat(smx_file_t fd, s_file_stat_t *buf)
   return simcall->file_stat.result;
 }
 
+/**
+ * \ingroup simix_file_management
+ *
+ */
+int simcall_file_unlink(smx_file_t fd)
+{
+  smx_simcall_t simcall = SIMIX_simcall_mine();
+  simcall->call = SIMCALL_FILE_UNLINK;
+  simcall->file_unlink.fd = fd;
+  if(MC_is_active()) /* Initialize result to a default value for snapshot comparison done during simcall */
+    simcall->file_unlink.result = -1;
+
+  SIMIX_simcall_push(simcall->issuer);
+
+  return simcall->file_unlink.result;
+}
+
+/**
+ * \ingroup simix_file_management
+ *
+ */
+xbt_dict_t simcall_file_ls(const char* mount, const char* path)
+{
+  smx_simcall_t simcall = SIMIX_simcall_mine();
+  simcall->call = SIMCALL_FILE_LS;
+  simcall->file_ls.mount = mount;
+  simcall->file_ls.path = path;
+  if(MC_is_active()) /* Initialize result to a default value for snapshot comparison done during simcall */
+    simcall->file_ls.result = NULL;
+
+  SIMIX_simcall_push(simcall->issuer);
+
+  return simcall->file_ls.result;
+}
+
+#ifdef HAVE_MC
+
+void *simcall_mc_snapshot(void)
+{
+  smx_simcall_t simcall = SIMIX_simcall_mine();
+  simcall->call = SIMCALL_MC_SNAPSHOT;
+  
+  SIMIX_simcall_push(simcall->issuer);
+
+  return simcall->mc_snapshot.s;
+}
+
+int simcall_mc_compare_snapshots(void *s1, void *s2){
+  
+  smx_simcall_t simcall = SIMIX_simcall_mine();
+  simcall->call = SIMCALL_MC_COMPARE_SNAPSHOTS;
+  simcall->mc_compare_snapshots.snapshot1 = s1;
+  simcall->mc_compare_snapshots.snapshot2 = s2;
+  
+  if(MC_is_active()) /* Initialize result to a default value for snapshot comparison done during simcall */
+    simcall->mc_compare_snapshots.result = -1;
+  
+  SIMIX_simcall_push(simcall->issuer);
+  
+  return simcall->mc_compare_snapshots.result;
+}
+
+#endif /* HAVE_MC */
+
+/* ****************************************************************************************** */
+/* TUTORIAL: New API                                                                          */
+/* All functions for simcall                                                                  */
+/* ****************************************************************************************** */
+int simcall_new_api_fct(const char* param1, double param2){
+  smx_simcall_t simcall = SIMIX_simcall_mine();
+  simcall->call = SIMCALL_NEW_API_INIT;
+  simcall->new_api.param1 = param1;
+  simcall->new_api.param2 = param2;
+
+  SIMIX_simcall_push(simcall->issuer);
+  return simcall->new_api.result;
+}
+
 /* ************************************************************************** */
 
 /** @brief returns a printable string representing a simcall */