X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/dc0f34684e609a2c90793146c1c61f8b81ac801d..248ef080d26ba69c3ce967cf6593190f50ff8677:/src/simix/smx_user.c

diff --git a/src/simix/smx_user.c b/src/simix/smx_user.c
index 5f28f0fc65..05932e93bc 100644
--- a/src/simix/smx_user.c
+++ b/src/simix/smx_user.c
@@ -1,20 +1,47 @@
-#include "private.h"
+/* smx_user.c - public interface to simix                                   */
+
+/* Copyright (c) 2010, 2011. 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"
 
 XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(simix);
+
+static const char* simcall_names[] = {
+#undef SIMCALL_ENUM_ELEMENT
+#define SIMCALL_ENUM_ELEMENT(x) #x /* generate strings from the enumeration values */
+SIMCALL_LIST
+#undef SIMCALL_ENUM_ELEMENT
+};
+
 /**
  * \brief Returns a host given its name.
  *
  * \param name The name of the host to get
  * \return The corresponding host
  */
-smx_host_t SIMIX_req_host_get_by_name(const char *name)
+smx_host_t simcall_host_get_by_name(const char *name)
 {
-  s_smx_req_t req;
+  smx_simcall_t simcall = SIMIX_simcall_mine();
 
-  req.call = REQ_HOST_GET_BY_NAME;
-  req.host_get_by_name.name = name;
-  SIMIX_request_push(&req);
-  return req.host_get_by_name.result;
+  simcall->call = SIMCALL_HOST_GET_BY_NAME;
+  simcall->host_get_by_name.name = name;
+  SIMIX_simcall_push(simcall->issuer);
+  return simcall->host_get_by_name.result;
 }
 
 /**
@@ -23,14 +50,14 @@ smx_host_t SIMIX_req_host_get_by_name(const char *name)
  * \param host A SIMIX host
  * \return The name of this host
  */
-const char* SIMIX_req_host_get_name(smx_host_t host)
+const char* simcall_host_get_name(smx_host_t host)
 {
-  s_smx_req_t req;
+  smx_simcall_t simcall = SIMIX_simcall_mine();
 
-  req.call = REQ_HOST_GET_NAME;
-  req.host_get_name.host = host;
-  SIMIX_request_push(&req);
-  return req.host_get_name.result;
+  simcall->call = SIMCALL_HOST_GET_NAME;
+  simcall->host_get_name.host = host;
+  SIMIX_simcall_push(simcall->issuer);
+  return simcall->host_get_name.result;
 }
 
 /**
@@ -39,14 +66,14 @@ const char* SIMIX_req_host_get_name(smx_host_t host)
  * \param host A host
  * \return The properties of this host
  */
-xbt_dict_t SIMIX_req_host_get_properties(smx_host_t host)
+xbt_dict_t simcall_host_get_properties(smx_host_t host)
 {
-  s_smx_req_t req;
+  smx_simcall_t simcall = SIMIX_simcall_mine();
 
-  req.call = REQ_HOST_GET_PROPERTIES;
-  req.host_get_properties.host = host;
-  SIMIX_request_push(&req);
-  return req.host_get_properties.result;
+  simcall->call = SIMCALL_HOST_GET_PROPERTIES;
+  simcall->host_get_properties.host = host;
+  SIMIX_simcall_push(simcall->issuer);
+  return simcall->host_get_properties.result;
 }
 
 /**
@@ -56,14 +83,14 @@ xbt_dict_t SIMIX_req_host_get_properties(smx_host_t host)
  * \param host A SIMIX host
  * \return The speed of this host (in Mflop/s)
  */
-double SIMIX_req_host_get_speed(smx_host_t host)
+double simcall_host_get_speed(smx_host_t host)
 {
-  s_smx_req_t req;
+  smx_simcall_t simcall = SIMIX_simcall_mine();
 
-  req.call = REQ_HOST_GET_SPEED;
-  req.host_get_speed.host = host;
-  SIMIX_request_push(&req);
-  return req.host_get_speed.result;
+  simcall->call = SIMCALL_HOST_GET_SPEED;
+  simcall->host_get_speed.host = host;
+  SIMIX_simcall_push(simcall->issuer);
+  return simcall->host_get_speed.result;
 }
 
 /**
@@ -71,14 +98,14 @@ double SIMIX_req_host_get_speed(smx_host_t host)
  *
  * \return Speed currently available (in Mflop/s)
  */
-double SIMIX_req_host_get_available_speed(smx_host_t host)
+double simcall_host_get_available_speed(smx_host_t host)
 {
-  s_smx_req_t req;
+  smx_simcall_t simcall = SIMIX_simcall_mine();
 
-  req.call = REQ_HOST_GET_AVAILABLE_SPEED;
-  req.host_get_available_speed.host = host;
-  SIMIX_request_push(&req);
-  return req.host_get_available_speed.result;
+  simcall->call = SIMCALL_HOST_GET_AVAILABLE_SPEED;
+  simcall->host_get_available_speed.host = host;
+  SIMIX_simcall_push(simcall->issuer);
+  return simcall->host_get_available_speed.result;
 }
 
 /**
@@ -88,14 +115,14 @@ double SIMIX_req_host_get_available_speed(smx_host_t host)
  * \param host A SIMIX host
  * \return 1 if the host is available, 0 otherwise
  */
-int SIMIX_req_host_get_state(smx_host_t host)
+int simcall_host_get_state(smx_host_t host)
 {
-  s_smx_req_t req;
+  smx_simcall_t simcall = SIMIX_simcall_mine();
 
-  req.call = REQ_HOST_GET_STATE;
-  req.host_get_state.host = host;
-  SIMIX_request_push(&req);
-  return req.host_get_state.result;
+  simcall->call = SIMCALL_HOST_GET_STATE;
+  simcall->host_get_state.host = host;
+  SIMIX_simcall_push(simcall->issuer);
+  return simcall->host_get_state.result;
 }
 
 /**
@@ -104,14 +131,14 @@ int SIMIX_req_host_get_state(smx_host_t host)
  * \param host SIMIX host
  * \return the user data of this host
  */
-void* SIMIX_req_host_get_data(smx_host_t host)
+void* simcall_host_get_data(smx_host_t host)
 {
-  s_smx_req_t req;
+  smx_simcall_t simcall = SIMIX_simcall_mine();
 
-  req.call = REQ_HOST_GET_DATA;
-  req.host_get_data.host = host;
-  SIMIX_request_push(&req);
-  return req.host_get_data.result;
+  simcall->call = SIMCALL_HOST_GET_DATA;
+  simcall->host_get_data.host = host;
+  SIMIX_simcall_push(simcall->issuer);
+  return simcall->host_get_data.result;
 }
 
 /**
@@ -121,14 +148,14 @@ void* SIMIX_req_host_get_data(smx_host_t host)
  * \param A host SIMIX host
  * \param data The user data to set
  */
-void SIMIX_req_host_set_data(smx_host_t host, void *data)
+void simcall_host_set_data(smx_host_t host, void *data)
 {
-  s_smx_req_t req;
+  smx_simcall_t simcall = SIMIX_simcall_mine();
 
-  req.call = REQ_HOST_SET_DATA;
-  req.host_set_data.host = host;
-  req.host_set_data.data = data;
-  SIMIX_request_push(&req);
+  simcall->call = SIMCALL_HOST_SET_DATA;
+  simcall->host_set_data.host = host;
+  simcall->host_set_data.data = data;
+  SIMIX_simcall_push(simcall->issuer);
 }
 
 /** \brief Creates an action that executes some computation of an host.
@@ -141,17 +168,23 @@ void SIMIX_req_host_set_data(smx_host_t host, void *data)
  * \param amount Computation amount (in bytes)
  * \return A new SIMIX execution action
  */
-smx_action_t SIMIX_req_host_execute(const char *name, smx_host_t host,
-                                double computation_amount)
+smx_action_t simcall_host_execute(const char *name, smx_host_t host,
+                                    double computation_amount,
+                                    double priority)
 {
-  s_smx_req_t req;
+  /* checking for infinite values */
+  xbt_assert(isfinite(computation_amount), "computation_amount is not finite!");
+  xbt_assert(isfinite(priority), "priority is not finite!");
+  
+  smx_simcall_t simcall = SIMIX_simcall_mine();
 
-  req.call = REQ_HOST_EXECUTE;
-  req.host_execute.name = name;
-  req.host_execute.host = host;
-  req.host_execute.computation_amount = computation_amount;
-  SIMIX_request_push(&req);
-  return req.host_execute.result;
+  simcall->call = SIMCALL_HOST_EXECUTE;
+  simcall->host_execute.name = name;
+  simcall->host_execute.host = host;
+  simcall->host_execute.computation_amount = computation_amount;
+  simcall->host_execute.priority = priority;
+  SIMIX_simcall_push(simcall->issuer);
+  return simcall->host_execute.result;
 }
 
 /** \brief Creates an action that may involve parallel computation on
@@ -167,7 +200,7 @@ smx_action_t SIMIX_req_host_execute(const char *name, smx_host_t host,
  * \param rate the SURF action rate
  * \return A new SIMIX execution action
  */
-smx_action_t SIMIX_req_host_parallel_execute(const char *name,
+smx_action_t simcall_host_parallel_execute(const char *name,
                                          int host_nb,
                                          smx_host_t *host_list,
                                          double *computation_amount,
@@ -175,18 +208,31 @@ smx_action_t SIMIX_req_host_parallel_execute(const char *name,
                                          double amount,
                                          double rate)
 {
-  s_smx_req_t req;
-
-  req.call = REQ_HOST_PARALLEL_EXECUTE;
-  req.host_parallel_execute.name = name;
-  req.host_parallel_execute.host_nb = host_nb;
-  req.host_parallel_execute.host_list = host_list;
-  req.host_parallel_execute.computation_amount = computation_amount;
-  req.host_parallel_execute.communication_amount = communication_amount;
-  req.host_parallel_execute.amount = amount;
-  req.host_parallel_execute.rate = rate;
-  SIMIX_request_push(&req);
-  return req.host_parallel_execute.result;
+  int i,j;
+  /* checking for infinite values */
+  for (i = 0 ; i < host_nb ; ++i) {
+     xbt_assert(isfinite(computation_amount[i]), "computation_amount[%d] is not finite!", i);
+     for (j = 0 ; j < host_nb ; ++j) {
+        xbt_assert(isfinite(communication_amount[i + host_nb * j]), 
+	           "communication_amount[%d+%d*%d] is not finite!", i, host_nb, j);
+     }   
+  }   
+ 
+  xbt_assert(isfinite(amount), "amount is not finite!");
+  xbt_assert(isfinite(rate), "rate is not finite!");
+  
+  smx_simcall_t simcall = SIMIX_simcall_mine();
+
+  simcall->call = SIMCALL_HOST_PARALLEL_EXECUTE;
+  simcall->host_parallel_execute.name = name;
+  simcall->host_parallel_execute.host_nb = host_nb;
+  simcall->host_parallel_execute.host_list = host_list;
+  simcall->host_parallel_execute.computation_amount = computation_amount;
+  simcall->host_parallel_execute.communication_amount = communication_amount;
+  simcall->host_parallel_execute.amount = amount;
+  simcall->host_parallel_execute.rate = rate;
+  SIMIX_simcall_push(simcall->issuer);
+  return simcall->host_parallel_execute.result;
 }
 
 /**
@@ -195,13 +241,13 @@ smx_action_t SIMIX_req_host_parallel_execute(const char *name,
  * 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
  */
-void SIMIX_req_host_execution_destroy(smx_action_t execution)
+void simcall_host_execution_destroy(smx_action_t execution)
 {
-  s_smx_req_t req;
+  smx_simcall_t simcall = SIMIX_simcall_mine();
 
-  req.call = REQ_HOST_EXECUTION_DESTROY;
-  req.host_execution_destroy.execution = execution;
-  SIMIX_request_push(&req);
+  simcall->call = SIMCALL_HOST_EXECUTION_DESTROY;
+  simcall->host_execution_destroy.execution = execution;
+  SIMIX_simcall_push(simcall->issuer);
 }
 
 /**
@@ -210,13 +256,13 @@ void SIMIX_req_host_execution_destroy(smx_action_t execution)
  * This functions stops the execution. It calls a surf function.
  * \param action The execution action to cancel
  */
-void SIMIX_req_host_execution_cancel(smx_action_t execution)
+void simcall_host_execution_cancel(smx_action_t execution)
 {
-  s_smx_req_t req;
+  smx_simcall_t simcall = SIMIX_simcall_mine();
 
-  req.call = REQ_HOST_EXECUTION_CANCEL;
-  req.host_execution_cancel.execution = execution;
-  SIMIX_request_push(&req);
+  simcall->call = SIMCALL_HOST_EXECUTION_CANCEL;
+  simcall->host_execution_cancel.execution = execution;
+  SIMIX_simcall_push(simcall->issuer);
 }
 
 /**
@@ -225,14 +271,14 @@ void SIMIX_req_host_execution_cancel(smx_action_t execution)
  * \param Action The execution action
  * \return The remaining amount
  */
-double SIMIX_req_host_execution_get_remains(smx_action_t execution)
+double simcall_host_execution_get_remains(smx_action_t execution)
 {
-  s_smx_req_t req;
+  smx_simcall_t simcall = SIMIX_simcall_mine();
 
-  req.call = REQ_HOST_EXECUTION_GET_REMAINS;
-  req.host_execution_get_remains.execution = execution;
-  SIMIX_request_push(&req);
-  return req.host_execution_get_remains.result;
+  simcall->call = SIMCALL_HOST_EXECUTION_GET_REMAINS;
+  simcall->host_execution_get_remains.execution = execution;
+  SIMIX_simcall_push(simcall->issuer);
+  return simcall->host_execution_get_remains.result;
 }
 
 /**
@@ -241,14 +287,14 @@ double SIMIX_req_host_execution_get_remains(smx_action_t execution)
  * \param execution The execution action
  * \return The state
  */
-e_smx_state_t SIMIX_req_host_execution_get_state(smx_action_t execution)
+e_smx_state_t simcall_host_execution_get_state(smx_action_t execution)
 {
-  s_smx_req_t req;
+  smx_simcall_t simcall = SIMIX_simcall_mine();
 
-  req.call = REQ_HOST_EXECUTION_GET_STATE;
-  req.host_execution_get_state.execution = execution;
-  SIMIX_request_push(&req);
-  return req.host_execution_get_state.result;
+  simcall->call = SIMCALL_HOST_EXECUTION_GET_STATE;
+  simcall->host_execution_get_state.execution = execution;
+  SIMIX_simcall_push(simcall->issuer);
+  return simcall->host_execution_get_state.result;
 }
 
 /**
@@ -258,64 +304,71 @@ e_smx_state_t SIMIX_req_host_execution_get_state(smx_action_t execution)
  * \param execution The execution action
  * \param priority The new priority
  */
-void SIMIX_req_host_execution_set_priority(smx_action_t execution, double priority)
+void simcall_host_execution_set_priority(smx_action_t execution, double priority)
 {
-  s_smx_req_t req;
+  /* checking for infinite values */
+  xbt_assert(isfinite(priority), "priority is not finite!");
+  
+  smx_simcall_t simcall = SIMIX_simcall_mine();
 
-  req.call = REQ_HOST_EXECUTION_SET_PRIORITY;
-  req.host_execution_set_priority.execution = execution;
-  req.host_execution_set_priority.priority = priority;
-  SIMIX_request_push(&req);
+  simcall->call = SIMCALL_HOST_EXECUTION_SET_PRIORITY;
+  simcall->host_execution_set_priority.execution = execution;
+  simcall->host_execution_set_priority.priority = priority;
+  SIMIX_simcall_push(simcall->issuer);
 }
 
 /**
- * \brief Waits for the completion of an execution action.
+ * \brief Waits for the completion of an execution action and destroy it.
  *
  * \param execution The execution action
  */
-void SIMIX_req_host_execution_wait(smx_action_t execution)
+e_smx_state_t simcall_host_execution_wait(smx_action_t execution)
 {
-  s_smx_req_t req;
+  smx_simcall_t simcall = SIMIX_simcall_mine();
 
-  req.call = REQ_HOST_EXECUTION_WAIT;
-  req.host_execution_wait.execution = execution;
-  SIMIX_request_push(&req);
+  simcall->call = SIMCALL_HOST_EXECUTION_WAIT;
+  simcall->host_execution_wait.execution = execution;
+  SIMIX_simcall_push(simcall->issuer);
+  return simcall->host_execution_wait.result;
 }
 
 /**
  * \brief Creates and runs a new SIMIX process.
  *
- * The structure and the corresponding threada are created and put in the list of ready processes.
+ * The structure and the corresponding thread are created and put in the list of ready processes.
  *
+ * \param process the process created will be stored in this pointer
  * \param name a name for the process. It is for user-level information and can be NULL.
  * \param code the main function of the process
  * \param data a pointer to any data one may want to attach to the new object. It is for user-level information and can be NULL.
- * It can be retrieved with the function \ref SIMIX_req_process_get_data.
+ * It can be retrieved with the function \ref simcall_process_get_data.
  * \param hostname name of the host where the new agent is executed.
+ * \param kill_time time when the process is killed
  * \param argc first argument passed to \a code
  * \param argv second argument passed to \a code
  * \param properties the properties of the process
- * \return The new process
  */
-smx_process_t SIMIX_req_process_create(const char *name,
-                                   xbt_main_func_t code,
-                                   void *data,
-                                   const char *hostname,
-                                   int argc, char **argv,
-                                   xbt_dict_t properties)
-{
-  s_smx_req_t req;
-
-  req.call = REQ_PROCESS_CREATE;
-  req.process_create.name = name;
-  req.process_create.code = code;
-  req.process_create.data = data;
-  req.process_create.hostname = hostname;
-  req.process_create.argc = argc;
-  req.process_create.argv = argv;
-  req.process_create.properties = properties;
-  SIMIX_request_push(&req);
-  return req.process_create.result;
+void simcall_process_create(smx_process_t *process, const char *name,
+                              xbt_main_func_t code,
+                              void *data,
+                              const char *hostname,
+                              double kill_time,
+                              int argc, char **argv,
+                              xbt_dict_t properties)
+{
+  smx_simcall_t simcall = SIMIX_simcall_mine();
+
+  simcall->call = SIMCALL_PROCESS_CREATE;
+  simcall->process_create.process = process;
+  simcall->process_create.name = name;
+  simcall->process_create.code = code;
+  simcall->process_create.data = data;
+  simcall->process_create.hostname = hostname;
+  simcall->process_create.kill_time = kill_time;
+  simcall->process_create.argc = argc;
+  simcall->process_create.argv = argv;
+  simcall->process_create.properties = properties;
+  SIMIX_simcall_push(simcall->issuer);
 }
 
 /** \brief Kills a SIMIX process.
@@ -324,13 +377,35 @@ smx_process_t SIMIX_req_process_create(const char *name,
  *
  * \param process poor victim
  */
-void SIMIX_req_process_kill(smx_process_t process)
+void simcall_process_kill(smx_process_t process)
 {
-  s_smx_req_t req;
+  smx_simcall_t simcall = SIMIX_simcall_mine();
 
-  req.call = REQ_PROCESS_KILL;
-  req.process_kill.process = process;
-  SIMIX_request_push(&req);
+  simcall->call = SIMCALL_PROCESS_KILL;
+  simcall->process_kill.process = process;
+  SIMIX_simcall_push(simcall->issuer);
+}
+
+/** \brief Kills all SIMIX processes.
+ */
+void simcall_process_killall(void)
+{
+  smx_simcall_t simcall = SIMIX_simcall_mine();
+
+  simcall->call = SIMCALL_PROCESS_KILLALL;
+  SIMIX_simcall_push(simcall->issuer);
+}
+
+/** \brief Cleans up a SIMIX process.
+ * \param process poor victim (must have already been killed)
+ */
+void simcall_process_cleanup(smx_process_t process)
+{
+  smx_simcall_t simcall = SIMIX_simcall_mine();
+
+  simcall->call = SIMCALL_PROCESS_CLEANUP;
+  simcall->process_cleanup.process = process;
+  SIMIX_simcall_push(simcall->issuer);
 }
 
 /**
@@ -342,15 +417,14 @@ void SIMIX_req_process_kill(smx_process_t process)
  * \param source name of the previous host
  * \param dest name of the new host
  */
-void SIMIX_req_process_change_host(smx_process_t process, const char *source, const char *dest)
+void simcall_process_change_host(smx_process_t process, smx_host_t dest)
 {
-  s_smx_req_t req;
+  smx_simcall_t simcall = SIMIX_simcall_mine();
 
-  req.call = REQ_PROCESS_CHANGE_HOST;
-  req.process_change_host.process = process;
-  req.process_change_host.source = source;
-  req.process_change_host.dest = dest;
-  SIMIX_request_push(&req);
+  simcall->call = SIMCALL_PROCESS_CHANGE_HOST;
+  simcall->process_change_host.process = process;
+  simcall->process_change_host.dest = dest;
+  SIMIX_simcall_push(simcall->issuer);
 }
 
 /**
@@ -361,13 +435,15 @@ void SIMIX_req_process_change_host(smx_process_t process, const char *source, co
  *
  * \param process a SIMIX process
  */
-void SIMIX_req_process_suspend(smx_process_t process)
+void simcall_process_suspend(smx_process_t process)
 {
-  s_smx_req_t req;
+  xbt_assert(process, "Invalid parameters");
 
-  req.call = REQ_PROCESS_SUSPEND;
-  req.process_suspend.process = process;
-  SIMIX_request_push(&req);
+  smx_simcall_t simcall = SIMIX_simcall_mine();
+
+  simcall->call = SIMCALL_PROCESS_SUSPEND;
+  simcall->process_suspend.process = process;
+  SIMIX_simcall_push(simcall->issuer);
 }
 
 /**
@@ -378,13 +454,13 @@ void SIMIX_req_process_suspend(smx_process_t process)
  *
  * \param process a SIMIX process
  */
-void SIMIX_req_process_resume(smx_process_t process)
+void simcall_process_resume(smx_process_t process)
 {
-  s_smx_req_t req;
+  smx_simcall_t simcall = SIMIX_simcall_mine();
 
-  req.call = REQ_PROCESS_RESUME;
-  req.process_resume.process = process;
-  SIMIX_request_push(&req);
+  simcall->call = SIMCALL_PROCESS_RESUME;
+  simcall->process_resume.process = process;
+  SIMIX_simcall_push(simcall->issuer);
 }
 
 /**
@@ -392,30 +468,33 @@ void SIMIX_req_process_resume(smx_process_t process)
  *
  * Maestro internal process is not counted, only user code processes are
  */
-int SIMIX_req_process_count(void)
+int simcall_process_count(void)
 {
-  s_smx_req_t req;
+  smx_simcall_t simcall = SIMIX_simcall_mine();
 
-  req.call = REQ_PROCESS_COUNT;
-  SIMIX_request_push(&req);
-  return req.process_count.result;
+  simcall->call = SIMCALL_PROCESS_COUNT;
+  SIMIX_simcall_push(simcall->issuer);
+  return simcall->process_count.result;
 }
 
 /**
  * \brief Return the user data of a #smx_process_t.
- *
- * This functions checks whether \a process is a valid pointer or not and return the user data associated to \a process if it is possible.
- * \param process SIMIX process
- * \return A void pointer to the user data
+ * \param process a SIMIX process
+ * \return the user data of this process
  */
-void* SIMIX_req_process_get_data(smx_process_t process)
+void* simcall_process_get_data(smx_process_t process)
 {
-  s_smx_req_t req;
+  if (process == SIMIX_process_self()) {
+    /* avoid a simcall if this function is called by the process itself */
+    return SIMIX_process_get_data(process);
+  }
 
-  req.call = REQ_PROCESS_GET_DATA;
-  req.process_get_data.process = process;
-  SIMIX_request_push(&req);
-  return req.process_get_data.result;
+  smx_simcall_t simcall = SIMIX_simcall_mine();
+
+  simcall->call = SIMCALL_PROCESS_GET_DATA;
+  simcall->process_get_data.process = process;
+  SIMIX_simcall_push(simcall->issuer);
+  return simcall->process_get_data.result;
 }
 
 /**
@@ -425,14 +504,39 @@ void* SIMIX_req_process_get_data(smx_process_t process)
  * \param process SIMIX process
  * \param data User data
  */
-void SIMIX_req_process_set_data(smx_process_t process, void *data)
+void simcall_process_set_data(smx_process_t process, void *data)
+{
+  if (process == SIMIX_process_self()) {
+    /* avoid a simcall if this function is called by the process itself */
+    SIMIX_process_self_set_data(process, data);
+  }
+  else {
+
+    smx_simcall_t simcall = SIMIX_simcall_mine();
+
+    simcall->call = SIMCALL_PROCESS_SET_DATA;
+    simcall->process_set_data.process = process;
+    simcall->process_set_data.data = data;
+    SIMIX_simcall_push(simcall->issuer);
+  }
+}
+
+/** \ingroup m_process_management
+ * \brief Set the kill time of a process.
+ *
+ * \param process a process
+ * \param kill_time a double
+ */
+void simcall_process_set_kill_time(smx_process_t process, double kill_time)
 {
-  s_smx_req_t req;
 
-  req.call = REQ_PROCESS_SET_DATA;
-  req.process_set_data.process = process;
-  req.process_set_data.data = data;
-  SIMIX_request_push(&req);
+  if (kill_time > SIMIX_get_clock()) {
+    if (simix_global->kill_process_function) {
+      XBT_DEBUG("Set kill time %f for process %s(%s)",kill_time, process->name,
+          process->smx_host->name);
+      SIMIX_timer_set(kill_time, simix_global->kill_process_function, process);
+    }
+  }
 }
 
 /**
@@ -442,14 +546,14 @@ void SIMIX_req_process_set_data(smx_process_t process, void *data)
  * \param process SIMIX process
  * \return SIMIX host
  */
-smx_host_t SIMIX_req_process_get_host(smx_process_t process)
+smx_host_t simcall_process_get_host(smx_process_t process)
 {
-  s_smx_req_t req;
+  smx_simcall_t simcall = SIMIX_simcall_mine();
 
-  req.call = REQ_PROCESS_GET_HOST;
-  req.process_get_host.process = process;
-  SIMIX_request_push(&req);
-  return req.process_get_host.result;
+  simcall->call = SIMCALL_PROCESS_GET_HOST;
+  simcall->process_get_host.process = process;
+  SIMIX_simcall_push(simcall->issuer);
+  return simcall->process_get_host.result;
 }
 
 /**
@@ -459,14 +563,19 @@ smx_host_t SIMIX_req_process_get_host(smx_process_t process)
  * \param process SIMIX process
  * \return The process name
  */
-const char* SIMIX_req_process_get_name(smx_process_t process)
+const char* simcall_process_get_name(smx_process_t process)
 {
-  s_smx_req_t req;
+  if (process == SIMIX_process_self()) {
+    /* avoid a simcall if this function is called by the process itself */
+    return process->name;
+  }
+
+  smx_simcall_t simcall = SIMIX_simcall_mine();
 
-  req.call = REQ_PROCESS_GET_NAME;
-  req.process_get_name.process = process;
-  SIMIX_request_push(&req);
-  return req.process_get_name.result;
+  simcall->call = SIMCALL_PROCESS_GET_NAME;
+  simcall->process_get_name.process = process;
+  SIMIX_simcall_push(simcall->issuer);
+  return simcall->process_get_name.result;
 }
 
 /**
@@ -476,14 +585,14 @@ const char* SIMIX_req_process_get_name(smx_process_t process)
  * \param process SIMIX process
  * \return 1, if the process is suspended, else 0.
  */
-int SIMIX_req_process_is_suspended(smx_process_t process)
+int simcall_process_is_suspended(smx_process_t process)
 {
-  s_smx_req_t req;
+  smx_simcall_t simcall = SIMIX_simcall_mine();
 
-  req.call = REQ_PROCESS_IS_SUSPENDED;
-  req.process_is_suspended.process = process;
-  SIMIX_request_push(&req);
-  return req.process_is_suspended.result;
+  simcall->call = SIMCALL_PROCESS_IS_SUSPENDED;
+  simcall->process_is_suspended.process = process;
+  SIMIX_simcall_push(simcall->issuer);
+  return simcall->process_is_suspended.result;
 }
 
 /** \ingroup m_process_management
@@ -491,14 +600,14 @@ int SIMIX_req_process_is_suspended(smx_process_t process)
  *
  * This functions returns the properties associated with this process
  */
-xbt_dict_t SIMIX_req_process_get_properties(smx_process_t process)
+xbt_dict_t simcall_process_get_properties(smx_process_t process)
 {
-  s_smx_req_t req;
+  smx_simcall_t simcall = SIMIX_simcall_mine();
 
-  req.call = REQ_PROCESS_GET_PROPERTIES;
-  req.process_get_properties.process = process;
-  SIMIX_request_push(&req);
-  return req.process_get_properties.result;
+  simcall->call = SIMCALL_PROCESS_GET_PROPERTIES;
+  simcall->process_get_properties.process = process;
+  SIMIX_simcall_push(simcall->issuer);
+  return simcall->process_get_properties.result;
 }
 
 /** \brief Creates a new sleep SIMIX action.
@@ -510,14 +619,17 @@ xbt_dict_t SIMIX_req_process_get_properties(smx_process_t process)
  * 	\param duration Time duration of the sleep.
  * 	\return A result telling whether the sleep was successful
  */
-e_smx_state_t SIMIX_req_process_sleep(double duration)
+e_smx_state_t simcall_process_sleep(double duration)
 {
-  s_smx_req_t req;
+  /* checking for infinite values */
+  xbt_assert(isfinite(duration), "duration is not finite!");
+  
+  smx_simcall_t simcall = SIMIX_simcall_mine();
 
-  req.call = REQ_PROCESS_SLEEP;
-  req.process_sleep.duration = duration;
-  SIMIX_request_push(&req);
-  return req.process_sleep.result;
+  simcall->call = SIMCALL_PROCESS_SLEEP;
+  simcall->process_sleep.duration = duration;
+  SIMIX_simcall_push(simcall->issuer);
+  return simcall->process_sleep.result;
 }
 
 /**
@@ -525,15 +637,15 @@ e_smx_state_t SIMIX_req_process_sleep(double duration)
  *  \param name The name of the rendez-vous point
  *  \return The created rendez-vous point
  */
-smx_rdv_t SIMIX_req_rdv_create(const char *name)
+smx_rdv_t simcall_rdv_create(const char *name)
 {
-  s_smx_req_t req;
+  smx_simcall_t simcall = SIMIX_simcall_mine();
 
-  req.call = REQ_RDV_CREATE;
-  req.rdv_create.name = name;
+  simcall->call = SIMCALL_RDV_CREATE;
+  simcall->rdv_create.name = name;
 
-  SIMIX_request_push(&req);
-  return req.rdv_create.result;
+  SIMIX_simcall_push(simcall->issuer);
+  return simcall->rdv_create.result;
 }
 
 
@@ -541,43 +653,51 @@ smx_rdv_t SIMIX_req_rdv_create(const char *name)
  *  \brief Destroy a rendez-vous point
  *  \param name The rendez-vous point to destroy
  */
-void SIMIX_req_rdv_destroy(smx_rdv_t rdv)
+void simcall_rdv_destroy(smx_rdv_t rdv)
 {
-  s_smx_req_t req;
+  smx_simcall_t simcall = SIMIX_simcall_mine();
 
-  req.call = REQ_RDV_DESTROY; 
-  req.rdv_destroy.rdv = rdv;
+  simcall->call = SIMCALL_RDV_DESTROY;
+  simcall->rdv_destroy.rdv = rdv;
 
-  SIMIX_request_push(&req);
+  SIMIX_simcall_push(simcall->issuer);
 }
 
-smx_rdv_t SIMIX_req_rdv_get_by_name(const char *name)
+smx_rdv_t simcall_rdv_get_by_name(const char *name)
 {
-  s_smx_req_t req;
+  xbt_assert(name != NULL, "Invalid parameter for simcall_rdv_get_by_name (name is NULL)");
 
-  req.call = REQ_RDV_GEY_BY_NAME;
-  req.rdv_get_by_name.name = name;
-  SIMIX_request_push(&req);
-  return req.rdv_get_by_name.result;
+  /* FIXME: this is a horrible lost of performance, so we hack it out by
+   * skipping the simcall (for now). It works in parallel, it won't work on
+   * distributed but probably we will change MSG for that. */
+
+  /*
+  smx_simcall_t simcall = simcall_mine();
+  simcall->call = SIMCALL_RDV_GEY_BY_NAME;
+  simcall->rdv_get_by_name.name = name;
+  SIMIX_simcall_push(simcall->issuer);
+  return simcall->rdv_get_by_name.result;*/
+
+  return SIMIX_rdv_get_by_name(name);
 }
 
 /**
- *  \brief counts the number of communication requests of a given host pending
- *         on a rendez-vous point
+ *  \brief Counts the number of communication actions of a given host pending
+ *         on a rendez-vous point.
  *  \param rdv The rendez-vous point
  *  \param host The host to be counted
- *  \return The number of comm request pending in the rdv
+ *  \return The number of comm actions pending in the rdv
  */
-int SIMIX_req_rdv_comm_count_by_host(smx_rdv_t rdv, smx_host_t host)
+int simcall_rdv_comm_count_by_host(smx_rdv_t rdv, smx_host_t host)
 {
-  s_smx_req_t req;
+  smx_simcall_t simcall = SIMIX_simcall_mine();
 
-  req.call = REQ_RDV_COMM_COUNT_BY_HOST; 
-  req.rdv_comm_count_by_host.rdv = rdv;
-  req.rdv_comm_count_by_host.host = 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;
 
-  SIMIX_request_push(&req);
-  return req.rdv_comm_count_by_host.result;
+  SIMIX_simcall_push(simcall->issuer);
+  return simcall->rdv_comm_count_by_host.result;
 }
 
 /**
@@ -585,105 +705,188 @@ int SIMIX_req_rdv_comm_count_by_host(smx_rdv_t rdv, smx_host_t host)
  *  \param rdv The rendez-vous point
  *  \return The communication or NULL if empty
  */
-smx_action_t SIMIX_req_rdv_get_head(smx_rdv_t rdv)
+smx_action_t simcall_rdv_get_head(smx_rdv_t rdv)
+{
+  smx_simcall_t simcall = SIMIX_simcall_mine();
+
+  simcall->call = SIMCALL_RDV_GET_HEAD;
+  simcall->rdv_get_head.rdv = rdv;
+
+  SIMIX_simcall_push(simcall->issuer);
+  return simcall->rdv_get_head.result;
+}
+
+void simcall_comm_send(smx_rdv_t rdv, double task_size, double rate,
+                         void *src_buff, size_t src_buff_size,
+                         int (*match_fun)(void *, void *, smx_action_t), void *data,
+                         double timeout)
+{
+  /* checking for infinite values */
+  xbt_assert(isfinite(task_size), "task_size is not finite!");
+  xbt_assert(isfinite(rate), "rate is not finite!");
+  xbt_assert(isfinite(timeout), "timeout is not finite!");
+  
+  xbt_assert(rdv, "No rendez-vous point defined for send");
+
+  if (MC_IS_ENABLED) {
+    /* 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);
+    simcall_comm_wait(comm, timeout);
+  }
+  else {
+    smx_simcall_t simcall = SIMIX_simcall_mine();
+
+    simcall->call = SIMCALL_COMM_SEND;
+    simcall->comm_send.rdv = rdv;
+    simcall->comm_send.task_size = task_size;
+    simcall->comm_send.rate = rate;
+    simcall->comm_send.src_buff = src_buff;
+    simcall->comm_send.src_buff_size = src_buff_size;
+    simcall->comm_send.match_fun = match_fun;
+    simcall->comm_send.data = data;
+    simcall->comm_send.timeout = timeout;
+
+    SIMIX_simcall_push(simcall->issuer);
+  }
+}
+
+smx_action_t simcall_comm_isend(smx_rdv_t rdv, double task_size, double rate,
+                              void *src_buff, size_t src_buff_size,
+                              int (*match_fun)(void *, void *, smx_action_t),
+                              void (*clean_fun)(void *),
+                              void *data,
+                              int detached)
 {
-  s_smx_req_t req;
+  /* checking for infinite values */
+  xbt_assert(isfinite(task_size), "task_size is not finite!");
+  xbt_assert(isfinite(rate), "rate is not finite!");
+  
+  xbt_assert(rdv, "No rendez-vous point defined for isend");
+
+  smx_simcall_t simcall = SIMIX_simcall_mine();
 
-  req.call = REQ_RDV_GET_HEAD; 
-  req.rdv_get_head.rdv = rdv;
+  simcall->call = SIMCALL_COMM_ISEND;
+  simcall->comm_isend.rdv = rdv;
+  simcall->comm_isend.task_size = task_size;
+  simcall->comm_isend.rate = rate;
+  simcall->comm_isend.src_buff = src_buff;
+  simcall->comm_isend.src_buff_size = src_buff_size;
+  simcall->comm_isend.match_fun = match_fun;
+  simcall->comm_isend.clean_fun = clean_fun;
+  simcall->comm_isend.data = data;
+  simcall->comm_isend.detached = detached;
 
-  SIMIX_request_push(&req);
-  return req.rdv_get_head.result;
+  SIMIX_simcall_push(simcall->issuer);
+  return simcall->comm_isend.result;
 }
 
-smx_action_t SIMIX_req_comm_isend(smx_rdv_t rdv, double task_size, double rate,
-                              void *src_buff, size_t src_buff_size, void *data)
+void simcall_comm_recv(smx_rdv_t rdv, void *dst_buff, size_t * dst_buff_size,
+                         int (*match_fun)(void *, void *, smx_action_t), void *data, double timeout)
 {
-  s_smx_req_t req;
+  xbt_assert(isfinite(timeout), "timeout is not finite!");
+  xbt_assert(rdv, "No rendez-vous point defined for recv");
 
-  xbt_assert0(rdv, "No rendez-vous point defined for isend");
+  if (MC_IS_ENABLED) {
+    /* the model-checker wants two separate simcalls */
+    smx_action_t comm = simcall_comm_irecv(rdv, dst_buff, dst_buff_size,
+        match_fun, data);
+    simcall_comm_wait(comm, timeout);
+  }
+  else {
+    smx_simcall_t simcall = SIMIX_simcall_mine();
 
-  req.call = REQ_COMM_ISEND;
-  req.comm_isend.rdv = rdv;
-  req.comm_isend.task_size = task_size;
-  req.comm_isend.rate = rate;
-  req.comm_isend.src_buff = src_buff;
-  req.comm_isend.src_buff_size = src_buff_size;
-  req.comm_isend.data = data;
+    simcall->call = SIMCALL_COMM_RECV;
+    simcall->comm_recv.rdv = rdv;
+    simcall->comm_recv.dst_buff = dst_buff;
+    simcall->comm_recv.dst_buff_size = dst_buff_size;
+    simcall->comm_recv.match_fun = match_fun;
+    simcall->comm_recv.data = data;
+    simcall->comm_recv.timeout = timeout;
 
-  SIMIX_request_push(&req);
-  return req.comm_isend.result;
+    SIMIX_simcall_push(simcall->issuer);
+  }
 }
 
-smx_action_t SIMIX_req_comm_irecv(smx_rdv_t rdv, void *dst_buff, size_t * dst_buff_size)
+smx_action_t simcall_comm_irecv(smx_rdv_t rdv, void *dst_buff, size_t * dst_buff_size,
+                                  int (*match_fun)(void *, void *, smx_action_t), void *data)
 {
-  s_smx_req_t req;
+  xbt_assert(rdv, "No rendez-vous point defined for irecv");
 
-  xbt_assert0(rdv, "No rendez-vous point defined for isend");
+  smx_simcall_t simcall = SIMIX_simcall_mine();
 
-  req.call = REQ_COMM_IRECV;
-  req.comm_irecv.rdv = rdv;
-  req.comm_irecv.dst_buff = dst_buff;
-  req.comm_irecv.dst_buff_size = dst_buff_size;
+  simcall->call = SIMCALL_COMM_IRECV;
+  simcall->comm_irecv.rdv = rdv;
+  simcall->comm_irecv.dst_buff = dst_buff;
+  simcall->comm_irecv.dst_buff_size = dst_buff_size;
+  simcall->comm_irecv.match_fun = match_fun;
+  simcall->comm_irecv.data = data;
 
-  SIMIX_request_push(&req);
-  return req.comm_irecv.result;
+  SIMIX_simcall_push(simcall->issuer);
+  return simcall->comm_irecv.result;
 }
 
-void SIMIX_req_comm_destroy(smx_action_t comm)
+void simcall_comm_destroy(smx_action_t comm)
 {
-  s_smx_req_t req;
+  xbt_assert(comm, "Invalid parameter");
 
-  req.call = REQ_COMM_DESTROY;
-  req.comm_destroy.comm = comm;
+  /* FIXME remove this simcall type: comms are auto-destroyed now */
 
-  SIMIX_request_push(&req);
+  /*
+  smx_simcall_t simcall = simcall_mine();
+
+  simcall->call = SIMCALL_COMM_DESTROY;
+  simcall->comm_destroy.comm = comm;
+
+  SIMIX_simcall_push(simcall->issuer);
+  */
 }
 
-void SIMIX_req_comm_cancel(smx_action_t comm)
+void simcall_comm_cancel(smx_action_t comm)
 {
-  s_smx_req_t req;
+  smx_simcall_t simcall = SIMIX_simcall_mine();
 
-  req.call = REQ_COMM_CANCEL;
-  req.comm_cancel.comm = comm;
+  simcall->call = SIMCALL_COMM_CANCEL;
+  simcall->comm_cancel.comm = comm;
 
-  SIMIX_request_push(&req);
+  SIMIX_simcall_push(simcall->issuer);
 }
 
-unsigned int SIMIX_req_comm_waitany(xbt_dynar_t comms)
+unsigned int simcall_comm_waitany(xbt_dynar_t comms)
 {
-  s_smx_req_t req;
+  smx_simcall_t simcall = SIMIX_simcall_mine();
 
-  req.call = REQ_COMM_WAITANY;
-  req.comm_waitany.comms = comms;
+  simcall->call = SIMCALL_COMM_WAITANY;
+  simcall->comm_waitany.comms = comms;
 
-  SIMIX_request_push(&req);
-  return req.comm_waitany.result;
+  SIMIX_simcall_push(simcall->issuer);
+  return simcall->comm_waitany.result;
 }
 
-int SIMIX_req_comm_testany(xbt_dynar_t comms)
+int simcall_comm_testany(xbt_dynar_t comms)
 {
-  s_smx_req_t req;
-  if (xbt_dynar_length(comms)==0)
+  smx_simcall_t simcall = SIMIX_simcall_mine();
+  if (xbt_dynar_is_empty(comms))
     return -1;
 
-  WARN0("SIMIX_comm_testany is not implemented yet. Using waitany instead. This changes the semantic...");
-  req.call = REQ_COMM_WAITANY;
-  req.comm_waitany.comms = comms;
+  simcall->call = SIMCALL_COMM_TESTANY;
+  simcall->comm_testany.comms = comms;
 
-  SIMIX_request_push(&req);
-  return req.comm_waitany.result;
+  SIMIX_simcall_push(simcall->issuer);
+  return simcall->comm_testany.result;
 }
 
-void SIMIX_req_comm_wait(smx_action_t comm, double timeout)
+void simcall_comm_wait(smx_action_t comm, double timeout)
 {
-  s_smx_req_t req;
+  xbt_assert(isfinite(timeout), "timeout is not finite!");
+  
+  smx_simcall_t simcall = SIMIX_simcall_mine();
 
-  req.call = REQ_COMM_WAIT;
-  req.comm_wait.comm = comm;
-  req.comm_wait.timeout = timeout;
+  simcall->call = SIMCALL_COMM_WAIT;
+  simcall->comm_wait.comm = comm;
+  simcall->comm_wait.timeout = timeout;
 
-  SIMIX_request_push(&req);
+  SIMIX_simcall_push(simcall->issuer);
 }
 
 #ifdef HAVE_TRACING
@@ -694,332 +897,380 @@ void SIMIX_req_comm_wait(smx_action_t comm, double timeout)
  * \param execution The execution action
  * \param category The tracing category
  */
-void SIMIX_req_set_category(smx_action_t action, const char *category)
+void simcall_set_category(smx_action_t action, const char *category)
 {
-  s_smx_req_t req;
+  if (category == NULL) {
+    return;
+  }
 
-  req.call = REQ_SET_CATEGORY;
-  req.set_category.action = action;
-  req.set_category.category = category;
+  smx_simcall_t simcall = SIMIX_simcall_mine();
 
-  SIMIX_request_push(&req);
+  simcall->call = SIMCALL_SET_CATEGORY;
+  simcall->set_category.action = action;
+  simcall->set_category.category = category;
+
+  SIMIX_simcall_push(simcall->issuer);
 }
 #endif
 
-int SIMIX_req_comm_test(smx_action_t comm)
+int simcall_comm_test(smx_action_t comm)
 {
-  s_smx_req_t req;
+  smx_simcall_t simcall = SIMIX_simcall_mine();
 
-  req.call = REQ_COMM_TEST;
-  req.comm_test.comm = comm;
+  simcall->call = SIMCALL_COMM_TEST;
+  simcall->comm_test.comm = comm;
 
-  SIMIX_request_push(&req);
-  return req.comm_test.result;
+  SIMIX_simcall_push(simcall->issuer);
+  return simcall->comm_test.result;
 }
 
-double SIMIX_req_comm_get_remains(smx_action_t comm)
+double simcall_comm_get_remains(smx_action_t comm)
 {
-  s_smx_req_t req;
+  smx_simcall_t simcall = SIMIX_simcall_mine();
 
-  req.call = REQ_COMM_GET_REMAINS;
-  req.comm_get_remains.comm = comm;
+  simcall->call = SIMCALL_COMM_GET_REMAINS;
+  simcall->comm_get_remains.comm = comm;
 
-  SIMIX_request_push(&req);
-  return req.comm_get_remains.result;
+  SIMIX_simcall_push(simcall->issuer);
+  return simcall->comm_get_remains.result;
 }
 
-e_smx_state_t SIMIX_req_comm_get_state(smx_action_t comm)
+e_smx_state_t simcall_comm_get_state(smx_action_t comm)
 {
-  s_smx_req_t req;
+  smx_simcall_t simcall = SIMIX_simcall_mine();
 
-  req.call = REQ_COMM_GET_STATE;
-  req.comm_get_state.comm = comm;
+  simcall->call = SIMCALL_COMM_GET_STATE;
+  simcall->comm_get_state.comm = comm;
 
-  SIMIX_request_push(&req);
-  return req.comm_get_state.result;
+  SIMIX_simcall_push(simcall->issuer);
+  return simcall->comm_get_state.result;
 }
 
-void *SIMIX_req_comm_get_data(smx_action_t comm)
+void *simcall_comm_get_src_data(smx_action_t comm)
 {
-  s_smx_req_t req;
+  smx_simcall_t simcall = SIMIX_simcall_mine();
 
-  req.call = REQ_COMM_GET_DATA;
-  req.comm_get_data.comm = comm;
+  simcall->call = SIMCALL_COMM_GET_SRC_DATA;
+  simcall->comm_get_src_data.comm = comm;
 
-  SIMIX_request_push(&req);
-  return req.comm_get_data.result;
+  SIMIX_simcall_push(simcall->issuer);
+  return simcall->comm_get_src_data.result;
 }
 
-void *SIMIX_req_comm_get_src_buff(smx_action_t comm)
+void *simcall_comm_get_dst_data(smx_action_t comm)
 {
-  s_smx_req_t req;
+  smx_simcall_t simcall = SIMIX_simcall_mine();
 
-  req.call = REQ_COMM_GET_SRC_BUFF;
-  req.comm_get_src_buff.comm = comm;
+  simcall->call = SIMCALL_COMM_GET_DST_DATA;
+  simcall->comm_get_dst_data.comm = comm;
 
-  SIMIX_request_push(&req);
-  return req.comm_get_src_buff.result;
+  SIMIX_simcall_push(simcall->issuer);
+  return simcall->comm_get_dst_data.result;
 }
 
-void *SIMIX_req_comm_get_dst_buff(smx_action_t comm)
+smx_process_t simcall_comm_get_src_proc(smx_action_t comm)
 {
-  s_smx_req_t req;
+  smx_simcall_t simcall = SIMIX_simcall_mine();
 
-  req.call = REQ_COMM_GET_DST_BUFF;
-  req.comm_get_dst_buff.comm = comm;
+  simcall->call = SIMCALL_COMM_GET_SRC_PROC;
+  simcall->comm_get_src_proc.comm = comm;
 
-  SIMIX_request_push(&req);
-  return req.comm_get_dst_buff.result;
+  SIMIX_simcall_push(simcall->issuer);
+  return simcall->comm_get_src_proc.result;
 }
 
-size_t SIMIX_req_comm_get_src_buff_size(smx_action_t comm)
+smx_process_t simcall_comm_get_dst_proc(smx_action_t comm)
 {
-  s_smx_req_t req;
+  smx_simcall_t simcall = SIMIX_simcall_mine();
 
-  req.call = REQ_COMM_GET_SRC_BUFF_SIZE;
-  req.comm_get_src_buff_size.comm = comm;
+  simcall->call = SIMCALL_COMM_GET_DST_PROC;
+  simcall->comm_get_dst_proc.comm = comm;
 
-  SIMIX_request_push(&req);
-  return req.comm_get_src_buff_size.result;
+  SIMIX_simcall_push(simcall->issuer);
+  return simcall->comm_get_dst_proc.result;
 }
 
-size_t SIMIX_req_comm_get_dst_buff_size(smx_action_t comm)
+#ifdef HAVE_LATENCY_BOUND_TRACKING
+int simcall_comm_is_latency_bounded(smx_action_t comm)
 {
-  s_smx_req_t req;
+  smx_simcall_t simcall = SIMIX_simcall_mine();
 
-  req.call = REQ_COMM_GET_DST_BUFF_SIZE;
-  req.comm_get_dst_buff_size.comm = comm;
+  simcall->call = SIMCALL_COMM_IS_LATENCY_BOUNDED;
+  simcall->comm_is_latency_bounded.comm = comm;
 
-  SIMIX_request_push(&req);
-  return req.comm_get_dst_buff_size.result;
+  SIMIX_simcall_push(simcall->issuer);
+  return simcall->comm_is_latency_bounded.result;
 }
+#endif
 
-smx_process_t SIMIX_req_comm_get_src_proc(smx_action_t comm)
+smx_mutex_t simcall_mutex_init(void)
 {
-  s_smx_req_t req;
+  smx_simcall_t simcall = SIMIX_simcall_mine();
 
-  req.call = REQ_COMM_GET_SRC_PROC;
-  req.comm_get_src_proc.comm = comm;
+  simcall->call = SIMCALL_MUTEX_INIT;
 
-  SIMIX_request_push(&req);
-  return req.comm_get_src_proc.result;
+  SIMIX_simcall_push(simcall->issuer);
+  return simcall->mutex_init.result;
 }
 
-smx_process_t SIMIX_req_comm_get_dst_proc(smx_action_t comm)
+void simcall_mutex_destroy(smx_mutex_t mutex)
 {
-  s_smx_req_t req;
+  smx_simcall_t simcall = SIMIX_simcall_mine();
 
-  req.call = REQ_COMM_GET_DST_PROC;
-  req.comm_get_dst_proc.comm = comm;
+  simcall->call = SIMCALL_MUTEX_DESTROY;
+  simcall->mutex_destroy.mutex = mutex;
 
-  SIMIX_request_push(&req);
-  return req.comm_get_dst_proc.result;
+  SIMIX_simcall_push(simcall->issuer);
 }
 
-#ifdef HAVE_LATENCY_BOUND_TRACKING
-int SIMIX_req_comm_is_latency_bounded(smx_action_t comm)
+void simcall_mutex_lock(smx_mutex_t mutex)
 {
-  s_smx_req_t req;
+  smx_simcall_t simcall = SIMIX_simcall_mine();
 
-  req.call = REQ_COMM_IS_LATENCY_BOUNDED;
-  req.comm_is_latency_bounded.comm = comm;
+  simcall->call = SIMCALL_MUTEX_LOCK;
+  simcall->mutex_lock.mutex = mutex;
 
-  SIMIX_request_push(&req);
-  return req.comm_is_latency_bounded.result;
+  SIMIX_simcall_push(simcall->issuer);
 }
-#endif
 
-smx_mutex_t SIMIX_req_mutex_init(void)
+int simcall_mutex_trylock(smx_mutex_t mutex)
 {
-  s_smx_req_t req;
+  smx_simcall_t simcall = SIMIX_simcall_mine();
 
-  req.call = REQ_MUTEX_INIT;
+  simcall->call = SIMCALL_MUTEX_TRYLOCK;
+  simcall->mutex_trylock.mutex = mutex;
 
-  SIMIX_request_push(&req);
-  return req.mutex_init.result;
+  SIMIX_simcall_push(simcall->issuer);
+  return simcall->mutex_trylock.result;
 }
 
-void SIMIX_req_mutex_destroy(smx_mutex_t mutex)
+void simcall_mutex_unlock(smx_mutex_t mutex)
 {
-  s_smx_req_t req;
+  smx_simcall_t simcall = SIMIX_simcall_mine();
 
-  req.call = REQ_MUTEX_DESTROY;
-  req.mutex_destroy.mutex = mutex;
+  simcall->call = SIMCALL_MUTEX_UNLOCK;
+  simcall->mutex_unlock.mutex = mutex;
 
-  SIMIX_request_push(&req);
+  SIMIX_simcall_push(simcall->issuer);
 }
 
-void SIMIX_req_mutex_lock(smx_mutex_t mutex)
+
+smx_cond_t simcall_cond_init(void)
 {
-  s_smx_req_t req;
+  smx_simcall_t simcall = SIMIX_simcall_mine();
 
-  req.call = REQ_MUTEX_LOCK;
-  req.mutex_lock.mutex = mutex;
+  simcall->call = SIMCALL_COND_INIT;
 
-  SIMIX_request_push(&req);
+  SIMIX_simcall_push(simcall->issuer);
+  return simcall->cond_init.result;
 }
 
-int SIMIX_req_mutex_trylock(smx_mutex_t mutex)
+void simcall_cond_destroy(smx_cond_t cond)
 {
-  s_smx_req_t req;
+  smx_simcall_t simcall = SIMIX_simcall_mine();
 
-  req.call = REQ_MUTEX_TRYLOCK;
-  req.mutex_trylock.mutex = mutex;
+  simcall->call = SIMCALL_COND_DESTROY;
+  simcall->cond_destroy.cond = cond;
 
-  SIMIX_request_push(&req);
-  return req.mutex_trylock.result;
+  SIMIX_simcall_push(simcall->issuer);
 }
 
-void SIMIX_req_mutex_unlock(smx_mutex_t mutex)
+void simcall_cond_signal(smx_cond_t cond)
 {
-  s_smx_req_t req;
+  smx_simcall_t simcall = SIMIX_simcall_mine();
 
-  req.call = REQ_MUTEX_UNLOCK;
-  req.mutex_unlock.mutex = mutex;
+  simcall->call = SIMCALL_COND_SIGNAL;
+  simcall->cond_signal.cond = cond;
 
-  SIMIX_request_push(&req);
+  SIMIX_simcall_push(simcall->issuer);
 }
 
-
-smx_cond_t SIMIX_req_cond_init(void)
+void simcall_cond_wait(smx_cond_t cond, smx_mutex_t mutex)
 {
-  s_smx_req_t req;
+  smx_simcall_t simcall = SIMIX_simcall_mine();
 
-  req.call = REQ_COND_INIT;
+  simcall->call = SIMCALL_COND_WAIT;
+  simcall->cond_wait.cond = cond;
+  simcall->cond_wait.mutex = mutex;
 
-  SIMIX_request_push(&req);
-  return req.cond_init.result;
+  SIMIX_simcall_push(simcall->issuer);
 }
 
-void SIMIX_req_cond_destroy(smx_cond_t cond)
+void simcall_cond_wait_timeout(smx_cond_t cond,
+                                 smx_mutex_t mutex,
+                                 double timeout)
 {
-  s_smx_req_t req;
+  xbt_assert(isfinite(timeout), "timeout is not finite!");
+  
+  smx_simcall_t simcall = SIMIX_simcall_mine();
 
-  req.call = REQ_COND_DESTROY;
-  req.cond_destroy.cond = cond;
+  simcall->call = SIMCALL_COND_WAIT_TIMEOUT;
+  simcall->cond_wait_timeout.cond = cond;
+  simcall->cond_wait_timeout.mutex = mutex;
+  simcall->cond_wait_timeout.timeout = timeout;
 
-  SIMIX_request_push(&req);
+  SIMIX_simcall_push(simcall->issuer);
 }
 
-void SIMIX_req_cond_signal(smx_cond_t cond)
+void simcall_cond_broadcast(smx_cond_t cond)
 {
-  s_smx_req_t req;
+  smx_simcall_t simcall = SIMIX_simcall_mine();
 
-  req.call = REQ_COND_SIGNAL;
-  req.cond_signal.cond = cond;
+  simcall->call = SIMCALL_COND_BROADCAST;
+  simcall->cond_broadcast.cond = cond;
 
-  SIMIX_request_push(&req);
+  SIMIX_simcall_push(simcall->issuer);
 }
 
-void SIMIX_req_cond_wait(smx_cond_t cond, smx_mutex_t mutex)
+
+smx_sem_t simcall_sem_init(int capacity)
 {
-  s_smx_req_t req;
+  smx_simcall_t simcall = SIMIX_simcall_mine();
 
-  req.call = REQ_COND_WAIT;
-  req.cond_wait.cond = cond;
-  req.cond_wait.mutex = mutex;
+  simcall->call = SIMCALL_SEM_INIT;
+  simcall->sem_init.capacity = capacity;
 
-  SIMIX_request_push(&req);
+  SIMIX_simcall_push(simcall->issuer);
+  return simcall->sem_init.result;
 }
 
-void SIMIX_req_cond_wait_timeout(smx_cond_t cond,
-                                 smx_mutex_t mutex,
-                                 double timeout)
+void simcall_sem_destroy(smx_sem_t sem)
 {
-  s_smx_req_t req;
+  smx_simcall_t simcall = SIMIX_simcall_mine();
 
-  req.call = REQ_COND_WAIT_TIMEOUT;
-  req.cond_wait_timeout.cond = cond;
-  req.cond_wait_timeout.mutex = mutex;
-  req.cond_wait_timeout.timeout = timeout;
+  simcall->call = SIMCALL_SEM_DESTROY;
+  simcall->sem_destroy.sem = sem;
 
-  SIMIX_request_push(&req);
+  SIMIX_simcall_push(simcall->issuer);
 }
 
-void SIMIX_req_cond_broadcast(smx_cond_t cond)
+void simcall_sem_release(smx_sem_t sem)
 {
-  s_smx_req_t req;
+  smx_simcall_t simcall = SIMIX_simcall_mine();
 
-  req.call = REQ_COND_BROADCAST;
-  req.cond_broadcast.cond = cond;
+  simcall->call = SIMCALL_SEM_RELEASE;
+  simcall->sem_release.sem = sem;
 
-  SIMIX_request_push(&req);
+  SIMIX_simcall_push(simcall->issuer);
 }
 
+int simcall_sem_would_block(smx_sem_t sem)
+{
+  smx_simcall_t simcall = SIMIX_simcall_mine();
+
+  simcall->call = SIMCALL_SEM_WOULD_BLOCK;
+  simcall->sem_would_block.sem = sem;
 
-smx_sem_t SIMIX_req_sem_init(int capacity)
+  SIMIX_simcall_push(simcall->issuer);
+  return simcall->sem_would_block.result;
+}
+
+void simcall_sem_acquire(smx_sem_t sem)
 {
-  s_smx_req_t req;
+  smx_simcall_t simcall = SIMIX_simcall_mine();
 
-  req.call = REQ_SEM_INIT;
-  req.sem_init.capacity = capacity;
+  simcall->call = SIMCALL_SEM_ACQUIRE;
+  simcall->sem_acquire.sem = sem;
 
-  SIMIX_request_push(&req);
-  return req.sem_init.result;
+  SIMIX_simcall_push(simcall->issuer);
 }
 
-void SIMIX_req_sem_destroy(smx_sem_t sem)
+void simcall_sem_acquire_timeout(smx_sem_t sem, double timeout)
 {
-  s_smx_req_t req;
+  xbt_assert(isfinite(timeout), "timeout is not finite!");
+  
+  smx_simcall_t simcall = SIMIX_simcall_mine();
 
-  req.call = REQ_SEM_DESTROY;
-  req.sem_destroy.sem = sem;
+  simcall->call = SIMCALL_SEM_ACQUIRE_TIMEOUT;
+  simcall->sem_acquire_timeout.sem = sem;
+  simcall->sem_acquire_timeout.timeout = timeout;
 
-  SIMIX_request_push(&req);
+  SIMIX_simcall_push(simcall->issuer);
 }
 
-void SIMIX_req_sem_release(smx_sem_t sem)
+int simcall_sem_get_capacity(smx_sem_t sem)
 {
-  s_smx_req_t req;
+  smx_simcall_t simcall = SIMIX_simcall_mine();
 
-  req.call = REQ_SEM_RELEASE;
-  req.sem_release.sem = sem;
+  simcall->call = SIMCALL_SEM_GET_CAPACITY;
+  simcall->sem_get_capacity.sem = sem;
 
-  SIMIX_request_push(&req);
+  SIMIX_simcall_push(simcall->issuer);
+  return simcall->sem_get_capacity.result;
 }
 
-int SIMIX_req_sem_would_block(smx_sem_t sem)
+size_t simcall_file_read(const char* storage, void* ptr, size_t size, size_t nmemb, smx_file_t stream)
 {
-  s_smx_req_t req;
+  smx_simcall_t simcall = SIMIX_simcall_mine();
 
-  req.call = REQ_SEM_WOULD_BLOCK;
-  req.sem_would_block.sem = sem;
+  simcall->call = SIMCALL_FILE_READ;
+  simcall->file_read.storage = storage;
+  simcall->file_read.ptr = ptr;
+  simcall->file_read.size = size;
+  simcall->file_read.nmemb = nmemb;
+  simcall->file_read.stream = stream;
+  SIMIX_simcall_push(simcall->issuer);
 
-  SIMIX_request_push(&req);
-  return req.sem_would_block.result;
+  return simcall->file_read.result;
 }
 
-void SIMIX_req_sem_acquire(smx_sem_t sem)
+size_t simcall_file_write(const char* storage, const void* ptr, size_t size, size_t nmemb, smx_file_t stream)
 {
-  s_smx_req_t req;
+  smx_simcall_t simcall = SIMIX_simcall_mine();
 
-  req.call = REQ_SEM_ACQUIRE;
-  req.sem_acquire.sem = sem;
+  simcall->call = SIMCALL_FILE_WRITE;
+  simcall->file_write.storage = storage;
+  simcall->file_write.ptr = ptr;
+  simcall->file_write.size = size;
+  simcall->file_write.nmemb = nmemb;
+  simcall->file_write.stream = stream;
+  SIMIX_simcall_push(simcall->issuer);
 
-  SIMIX_request_push(&req);
+  return simcall->file_write.result;
 }
 
-void SIMIX_req_sem_acquire_timeout(smx_sem_t sem, double timeout)
+smx_file_t simcall_file_open(const char* storage, const char* path, const char* mode)
 {
-  s_smx_req_t req;
+  smx_simcall_t simcall = SIMIX_simcall_mine();
 
-  req.call = REQ_SEM_ACQUIRE_TIMEOUT;
-  req.sem_acquire_timeout.sem = sem;
-  req.sem_acquire_timeout.timeout = timeout;
+  simcall->call = SIMCALL_FILE_OPEN;
+  simcall->file_open.storage = storage;
+  simcall->file_open.path = path;
+  simcall->file_open.mode = mode;
+  SIMIX_simcall_push(simcall->issuer);
 
-  SIMIX_request_push(&req);
+  return simcall->file_open.result;
 }
 
-int SIMIX_req_sem_get_capacity(smx_sem_t sem)
+int simcall_file_close(const char* storage, smx_file_t fp)
 {
-  s_smx_req_t req;
+  smx_simcall_t simcall = SIMIX_simcall_mine();
 
-  req.call = REQ_SEM_GET_CAPACITY;
-  req.sem_get_capacity.sem = sem;
+  simcall->call = SIMCALL_FILE_CLOSE;
+  simcall->file_close.storage = storage;
+  simcall->file_close.fp = fp;
+  SIMIX_simcall_push(simcall->issuer);
 
-  SIMIX_request_push(&req);
-  return req.sem_get_capacity.result;
+  return simcall->file_close.result;
 }
 
+int simcall_file_stat(const char* storage, smx_file_t fd, s_file_stat_t *buf)
+{
+  smx_simcall_t simcall = SIMIX_simcall_mine();
+  simcall->call = SIMCALL_FILE_STAT;
+  simcall->file_stat.storage = storage;
+  simcall->file_stat.fd = fd;
+
+  SIMIX_simcall_push(simcall->issuer);
 
+  *buf = simcall->file_stat.buf;
 
+  return simcall->file_stat.result;
+}
+
+/* ************************************************************************** */
+
+/** @brief returns a printable string representing a simcall */
+const char *SIMIX_simcall_name(e_smx_simcall_t kind) {
+  return simcall_names[kind];
+}