X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/3e95216b840bc4ca11be6d21b98d27ca91edba93..a7bdcd8afa4b48dad527d34ba2dbc52f037e2c12:/src/msg/gos.c

diff --git a/src/msg/gos.c b/src/msg/gos.c
index bab95282a2..d00b79152a 100644
--- a/src/msg/gos.c
+++ b/src/msg/gos.c
@@ -1,15 +1,17 @@
-/* 	$Id$	 */
-
-/* Copyright (c) 2002,2003,2004 Arnaud Legrand. All rights reserved.        */
+/*     $Id$      */
+  
+/* Copyright (c) 2002-2007 Arnaud Legrand.                                  */
+/* Copyright (c) 2007 Bruno Donassolo.                                      */
+/* 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 "msg/private.h"
 #include "xbt/sysdep.h"
 #include "xbt/log.h"
-XBT_LOG_NEW_DEFAULT_SUBCATEGORY(msg_gos, msg,
-				"Logging specific to MSG (gos)");
+
+XBT_LOG_NEW_DEFAULT_SUBCATEGORY(msg_gos, msg, "Logging specific to MSG (gos)");
 
 /** \defgroup msg_gos_functions MSG Operating System Functions
  *  \brief This section describes the functions that can be used
@@ -21,16 +23,17 @@ static MSG_error_t __MSG_task_get_with_time_out_from_host(m_task_t * task,
 							double max_duration,
 							m_host_t host)
 {
+
   m_process_t process = MSG_process_self();
   m_task_t t = NULL;
   m_host_t h = NULL;
-  m_task_t task_to_wait_for;
   simdata_task_t t_simdata = NULL;
   simdata_host_t h_simdata = NULL;
   int first_time = 1;
-  e_surf_action_state_t state = SURF_ACTION_NOT_IN_THE_SYSTEM;
   xbt_fifo_item_t item = NULL;
 
+	smx_cond_t cond = NULL;			//conditional wait if the task isn't on the channel yet
+
   CHECK_HOST();
   xbt_assert1((channel>=0) && (channel < msg_global->max_channel),"Invalid channel %d",channel);
   /* Sanity check */
@@ -45,121 +48,107 @@ static MSG_error_t __MSG_task_get_with_time_out_from_host(m_task_t * task,
 
   DEBUG2("Waiting for a task on channel %d (%s)", channel,h->name);
 
+	SIMIX_mutex_lock(h->simdata->mutex);
   while (1) {
-    if(xbt_fifo_size(h_simdata->mbox[channel])>0) {
-      if(!host) {
-	t = xbt_fifo_shift(h_simdata->mbox[channel]);
-	break;
-      } else {
-	xbt_fifo_foreach(h->simdata->mbox[channel],item,t,m_task_t) {
-	  if(t->simdata->source==host) break;
-	}
-	if(item) {
-	  xbt_fifo_remove_item(h->simdata->mbox[channel],item);
-	  break;
-	} 
-      }
-    }
-						       
-    if(max_duration>0) {
-      if(!first_time) {
-	PAJE_PROCESS_POP_STATE(process);
-	MSG_RETURN(MSG_TRANSFER_FAILURE);
-      }
-    }
-    xbt_assert3(!(h_simdata->sleeping[channel]),
-		"A process (%s(%d)) is already blocked on channel %d",
-		h_simdata->sleeping[channel]->name,
-		h_simdata->sleeping[channel]->simdata->PID,
-		channel);
-    h_simdata->sleeping[channel] = process; /* I'm waiting. Wake me up when you're ready */
-    if(max_duration>0) {
-      __MSG_process_block(max_duration,"");
-    } else {
-      __MSG_process_block(-1,"");
-    }
-    h_simdata->sleeping[channel] = NULL;
-    first_time = 0;
-    if(surf_workstation_resource->extension_public->get_state(h_simdata->host) 
-       == SURF_CPU_OFF)
+		if(xbt_fifo_size(h_simdata->mbox[channel])>0) {
+			if(!host) {
+				t = xbt_fifo_shift(h_simdata->mbox[channel]);
+				break;
+			} else {
+				xbt_fifo_foreach(h->simdata->mbox[channel],item,t,m_task_t) {
+					if(t->simdata->source==host) break;
+				}
+				if(item) {
+					xbt_fifo_remove_item(h->simdata->mbox[channel],item);
+					break;
+				} 
+			}
+		}
+		
+		if(max_duration>0) {
+			if(!first_time) {
+				SIMIX_mutex_unlock(h->simdata->mutex);
+				h_simdata->sleeping[channel] = NULL;
+				SIMIX_cond_destroy(cond);
+				MSG_RETURN(MSG_TRANSFER_FAILURE);
+			}
+		}
+		xbt_assert1(!(h_simdata->sleeping[channel]),"A process is already blocked on channel %d", channel);
+	
+		cond = SIMIX_cond_init();
+		h_simdata->sleeping[channel] = cond;
+		if (max_duration > 0) {
+			SIMIX_cond_wait_timeout(cond, h->simdata->mutex, max_duration);
+		}
+		else SIMIX_cond_wait(h_simdata->sleeping[channel],h->simdata->mutex);
+
+		if(SIMIX_host_get_state(h_simdata->s_host)==0)
       MSG_RETURN(MSG_HOST_FAILURE);
-    /* OK, we should both be ready now. Are you there ? */
-  }
+
+		first_time = 0;
+	}
+	SIMIX_mutex_unlock(h->simdata->mutex);
 
   DEBUG1("OK, got a task (%s)", t->name);
+	/* clean conditional */
+	if (cond) {
+		SIMIX_cond_destroy(cond);
+		h_simdata->sleeping[channel] = NULL;
+	}
 
   t_simdata = t->simdata;
-  /*   *task = __MSG_task_copy(t); */
+	t_simdata->receiver = process;
   *task=t;
 
+	SIMIX_mutex_lock(t_simdata->mutex);
+
   /* Transfer */
   t_simdata->using++;
+	/* create SIMIX action to the communication */
+	t_simdata->comm = SIMIX_action_communicate(t_simdata->sender->simdata->m_host->simdata->s_host,
+						   process->simdata->m_host->simdata->s_host,t->name, t_simdata->message_size, 
+						   t_simdata->rate); 
+	/* if the process is suspend, create the action but stop its execution, it will be restart when the sender process resume */
+	if (MSG_process_is_suspended(t_simdata->sender)) {
+		DEBUG1("Process sender (%s) suspended", t_simdata->sender->name);
+		SIMIX_action_set_priority(t_simdata->comm,0);
+	}
+	process->simdata->waiting_task = t;
+	SIMIX_register_action_to_condition(t_simdata->comm, t_simdata->cond);
+	SIMIX_cond_wait(t_simdata->cond,t_simdata->mutex);
+	process->simdata->waiting_task = NULL;
+
+	/* the task has already finished and the pointer must be null*/
+	if (t->simdata->sender) {
+		t->simdata->sender->simdata->waiting_task = NULL;
+		/* action ended, set comm and compute = NULL, the actions is already destroyed in the main function */
+		//t->simdata->comm = NULL;
+		//t->simdata->compute = NULL;
+	}
+	/* for this process, don't need to change in get function*/
+	t->simdata->receiver = NULL;
+	SIMIX_mutex_unlock(t_simdata->mutex);
 
-  while(MSG_process_is_suspended(t_simdata->sender)) {
-    DEBUG1("Oooups, the sender (%s) has been suspended in the meantime. Let's wait for him", 
-	   t_simdata->sender->name);
-    task_to_wait_for = t_simdata->sender->simdata->waiting_task;
-    if(__MSG_process_isBlocked(t_simdata->sender)) {
-      DEBUG0("He's blocked. Let's wait for him to go in the suspended state");
-      __MSG_process_unblock(t_simdata->sender);
-      task_to_wait_for->simdata->using++;
-      __MSG_task_wait_event(process, task_to_wait_for);
-      MSG_task_destroy(task_to_wait_for);
-    } else {
-      DEBUG0("He's suspended. Let's wait for him to go in the resumed state");
-      task_to_wait_for->simdata->using++;
-      __MSG_task_wait_event(process, task_to_wait_for);
-      MSG_task_destroy(task_to_wait_for);
-      DEBUG0("He's resumed. He should block again. So let's free him.");
-      __MSG_process_unblock(t_simdata->sender);
-      break;
-    }
-  }
-  DEBUG0("Calling SURF for communication creation");
-  t_simdata->comm = surf_workstation_resource->extension_public->
-    communicate(MSG_process_get_host(t_simdata->sender)->simdata->host,
-		h->simdata->host, t_simdata->message_size,t_simdata->rate);
-  
-  surf_workstation_resource->common_public->action_set_data(t_simdata->comm,t);
-
-  if(__MSG_process_isBlocked(t_simdata->sender)) {
-    DEBUG1("Unblocking %s",t_simdata->sender->name);
-    __MSG_process_unblock(t_simdata->sender);
-  }
-
-  PAJE_PROCESS_PUSH_STATE(process,"C",t);  
-
-  do {
-    DEBUG0("Waiting for action termination");
-    __MSG_task_wait_event(process, t);
-    state=surf_workstation_resource->common_public->action_get_state(t_simdata->comm);
-  } while (state==SURF_ACTION_RUNNING);
-  DEBUG0("Action terminated");
-
-  if(t->simdata->using>1) {
-    xbt_fifo_unshift(msg_global->process_to_run,process);
-    xbt_context_yield();
-  }
-
-  PAJE_PROCESS_POP_STATE(process);
-  PAJE_COMM_STOP(process,t,channel);
 
-  if(state == SURF_ACTION_DONE) {
-    if(surf_workstation_resource->common_public->action_free(t_simdata->comm)) 
-      t_simdata->comm = NULL;
+	if(SIMIX_action_get_state(t_simdata->comm) == SURF_ACTION_DONE) {
+		//t_simdata->comm = NULL;
+		SIMIX_action_destroy(t_simdata->comm);
+		t_simdata->comm = NULL;
     MSG_RETURN(MSG_OK);
-  } else if(surf_workstation_resource->extension_public->get_state(h_simdata->host) 
-	  == SURF_CPU_OFF) {
-    if(surf_workstation_resource->common_public->action_free(t_simdata->comm)) 
-      t_simdata->comm = NULL;
+	} else if (SIMIX_host_get_state(h_simdata->s_host)==0) {
+		//t_simdata->comm = NULL;
+		SIMIX_action_destroy(t_simdata->comm);
+		t_simdata->comm = NULL;
     MSG_RETURN(MSG_HOST_FAILURE);
-  } else {
-    if(surf_workstation_resource->common_public->action_free(t_simdata->comm)) 
-      t_simdata->comm = NULL;
+  } else { 
+		//t_simdata->comm = NULL;
+		SIMIX_action_destroy(t_simdata->comm);
+		t_simdata->comm = NULL;
     MSG_RETURN(MSG_TRANSFER_FAILURE);
   }
-}
 
+}
+	
 /** \ingroup msg_gos_functions
  * \brief Listen on a channel and wait for receiving a task.
  *
@@ -240,8 +229,10 @@ int MSG_task_Iprobe(m_channel_t channel)
   m_host_t h = NULL;
 
   xbt_assert1((channel>=0) && (channel < msg_global->max_channel),"Invalid channel %d",channel);
-  DEBUG2("Probing on channel %d (%s)", channel,h->name);
   CHECK_HOST();
+
+  DEBUG2("Probing on channel %d (%s)", channel,h->name);
+
   h = MSG_host_self();
   return(xbt_fifo_get_first_item(h->simdata->mbox[channel])!=NULL);
 }
@@ -263,12 +254,13 @@ int MSG_task_probe_from(m_channel_t channel)
 
   xbt_assert1((channel>=0) && (channel < msg_global->max_channel),"Invalid channel %d",channel);
   CHECK_HOST();
+
   h = MSG_host_self();
 
   DEBUG2("Probing on channel %d (%s)", channel,h->name);
    
   item = xbt_fifo_get_first_item(h->simdata->mbox[channel]);
-  if (!item || !(t = xbt_fifo_get_item_content(item)))
+  if ( (!item) || (!(t = xbt_fifo_get_item_content(item))) )
     return -1;
    
   return MSG_process_get_PID(t->simdata->sender);
@@ -291,60 +283,61 @@ int MSG_task_probe_from(m_channel_t channel)
    and #MSG_OK otherwise.
  */
 MSG_error_t MSG_channel_select_from(m_channel_t channel, double max_duration,
-				    int *PID)
+		int *PID)
 {
-  m_host_t h = NULL;
-  simdata_host_t h_simdata = NULL;
-  xbt_fifo_item_t item;
-  m_task_t t;
-  int first_time = 1;
-  m_process_t process = MSG_process_self();
-
-  xbt_assert1((channel>=0) && (channel < msg_global->max_channel),"Invalid channel %d",channel);
-  if(PID) {
-    *PID = -1;
-  }
+	m_host_t h = NULL;
+	simdata_host_t h_simdata = NULL;
+	xbt_fifo_item_t item;
+	m_task_t t;
+	int first_time = 1;
+	smx_cond_t cond;
+
+	xbt_assert1((channel>=0) && (channel < msg_global->max_channel),"Invalid channel %d",channel);
+	if(PID) {
+		*PID = -1;
+	}
 
-  if(max_duration==0.0) {
-    *PID = MSG_task_probe_from(channel);
-    MSG_RETURN(MSG_OK);
-  } else {
-    CHECK_HOST();
-    h = MSG_host_self();
-    h_simdata = h->simdata;
-    
-    DEBUG2("Probing on channel %d (%s)", channel,h->name);
-    while(!(item = xbt_fifo_get_first_item(h->simdata->mbox[channel]))) {
-      if(max_duration>0) {
-	if(!first_time) {
-	  MSG_RETURN(MSG_OK);
+	if(max_duration==0.0) {
+		*PID = MSG_task_probe_from(channel);
+		MSG_RETURN(MSG_OK);
+	} else {
+		CHECK_HOST();
+		h = MSG_host_self();
+		h_simdata = h->simdata;
+
+		DEBUG2("Probing on channel %d (%s)", channel,h->name);
+		while(!(item = xbt_fifo_get_first_item(h->simdata->mbox[channel]))) {
+			if(max_duration>0) {
+				if(!first_time) {
+					MSG_RETURN(MSG_OK);
+				}
+			}
+			SIMIX_mutex_lock(h_simdata->mutex);
+			xbt_assert1(!(h_simdata->sleeping[channel]),
+					"A process is already blocked on this channel %d", channel);
+			cond = SIMIX_cond_init();
+			h_simdata->sleeping[channel] = cond; /* I'm waiting. Wake me up when you're ready */
+			if(max_duration>0) {
+				SIMIX_cond_wait_timeout(cond,h_simdata->mutex, max_duration);
+			} else {
+				SIMIX_cond_wait(cond,h_simdata->mutex);
+			}
+			SIMIX_cond_destroy(cond);
+			SIMIX_mutex_unlock(h_simdata->mutex);
+			if(SIMIX_host_get_state(h_simdata->s_host)==0) {
+				MSG_RETURN(MSG_HOST_FAILURE);
+			}
+			h_simdata->sleeping[channel] = NULL;
+			first_time = 0;
+		}
+		if (!item || !(t = xbt_fifo_get_item_content(item))) {
+			MSG_RETURN(MSG_OK);
+		}
+		if(PID) {
+			*PID = MSG_process_get_PID(t->simdata->sender);
+		}
+		MSG_RETURN(MSG_OK);
 	}
-      }
-      xbt_assert2(!(h_simdata->sleeping[channel]),
-		  "A process (%s(%d)) is already blocked on this channel",
-		  h_simdata->sleeping[channel]->name,
-		  h_simdata->sleeping[channel]->simdata->PID);
-      h_simdata->sleeping[channel] = process; /* I'm waiting. Wake me up when you're ready */
-      if(max_duration>0) {
-	__MSG_process_block(max_duration,"");
-      } else {
-	__MSG_process_block(-1,"");
-      }
-      if(surf_workstation_resource->extension_public->get_state(h_simdata->host) 
-	 == SURF_CPU_OFF) {
-	MSG_RETURN(MSG_HOST_FAILURE);
-      }
-      h_simdata->sleeping[channel] = NULL;
-      first_time = 0;
-    }
-    if (!item || !(t = xbt_fifo_get_item_content(item))) {
-      MSG_RETURN(MSG_OK);
-    }
-    if(PID) {
-      *PID = MSG_process_get_PID(t->simdata->sender);
-    }
-    MSG_RETURN(MSG_OK);
-  }
 }
 
 
@@ -413,13 +406,12 @@ int MSG_task_probe_from_host(int channel, m_host_t host)
 MSG_error_t MSG_task_put_with_timeout(m_task_t task, m_host_t dest, 
 				      m_channel_t channel, double max_duration)
 {
+
+
   m_process_t process = MSG_process_self();
   simdata_task_t task_simdata = NULL;
-  e_surf_action_state_t state = SURF_ACTION_NOT_IN_THE_SYSTEM;
   m_host_t local_host = NULL;
   m_host_t remote_host = NULL;
-  int first_time = 1;
-
   CHECK_HOST();
 
   xbt_assert1((channel>=0) && (channel < msg_global->max_channel),"Invalid channel %d",channel);
@@ -428,90 +420,74 @@ MSG_error_t MSG_task_put_with_timeout(m_task_t task, m_host_t dest,
   task_simdata->sender = process;
   task_simdata->source = MSG_process_get_host(process);
   xbt_assert0(task_simdata->using==1,
-	      "This taks is still being used somewhere else. You cannot send it now. Go fix your code!");
+	      "This task is still being used somewhere else. You cannot send it now. Go fix your code!");
   task_simdata->comm = NULL;
   
-  local_host = ((simdata_process_t) process->simdata)->host;
+  local_host = ((simdata_process_t) process->simdata)->m_host;
   remote_host = dest;
 
   DEBUG4("Trying to send a task (%g kB) from %s to %s on channel %d", 
 	 task->simdata->message_size/1000,local_host->name, remote_host->name, channel);
 
+	SIMIX_mutex_lock(remote_host->simdata->mutex);
   xbt_fifo_push(((simdata_host_t) remote_host->simdata)->
 		mbox[channel], task);
 
-  PAJE_COMM_START(process,task,channel);
-    
+  
   if(remote_host->simdata->sleeping[channel]) {
     DEBUG0("Somebody is listening. Let's wake him up!");
-    __MSG_process_unblock(remote_host->simdata->sleeping[channel]);
+		SIMIX_cond_signal(remote_host->simdata->sleeping[channel]);
   }
+	SIMIX_mutex_unlock(remote_host->simdata->mutex);
 
   process->simdata->put_host = dest;
   process->simdata->put_channel = channel;
-  while(!(task_simdata->comm)) {
-    if(max_duration>0) {
-      if(!first_time) {
-	PAJE_PROCESS_POP_STATE(process);
-	PAJE_COMM_STOP(process,task,channel);
-	MSG_RETURN(MSG_TRANSFER_FAILURE);
-      }
-    }
-    DEBUG0("Communication not initiated yet. Let's block!");
-    if(max_duration>0)
-      __MSG_process_block(max_duration,task->name);
-    else
-      __MSG_process_block(-1,task->name);
-
-    first_time = 0;
-
-    if(surf_workstation_resource->extension_public->
-       get_state(local_host->simdata->host) == SURF_CPU_OFF) {
-      xbt_fifo_remove(((simdata_host_t) remote_host->simdata)->mbox[channel],
-		      task);
-      PAJE_PROCESS_POP_STATE(process);
-      PAJE_COMM_STOP(process,task,channel);
-      MSG_task_destroy(task);
-      MSG_RETURN(MSG_HOST_FAILURE);
-    }
-  }
-  DEBUG0("Registering to this communication");
-  surf_workstation_resource->common_public->action_use(task_simdata->comm);
-  process->simdata->put_host = NULL;
-  process->simdata->put_channel = -1;
-
-
-  PAJE_PROCESS_PUSH_STATE(process,"C",task);  
-
-  state=surf_workstation_resource->common_public->action_get_state(task_simdata->comm);
-  while (state==SURF_ACTION_RUNNING) {
-    DEBUG0("Waiting for action termination");
-    __MSG_task_wait_event(process, task);
-    state=surf_workstation_resource->common_public->action_get_state(task_simdata->comm);
-  }
-  DEBUG0("Action terminated");
-  task->simdata->rate=-1.0; /* Sets the rate back to default */
+	SIMIX_mutex_lock(task->simdata->mutex);
+ // DEBUG4("Task sent (%g kB) from %s to %s on channel %d, waiting...", task->simdata->message_size/1000,local_host->name, remote_host->name, channel);
+
+	process->simdata->waiting_task = task;
+	if (max_duration >0) {
+		SIMIX_cond_wait_timeout(task->simdata->cond,task->simdata->mutex,max_duration);
+		/* verify if the timeout happened and the communication didn't started yet */
+		if (task->simdata->comm==NULL) {
+			task->simdata->using--;
+			process->simdata->waiting_task = NULL;
+			xbt_fifo_remove(((simdata_host_t) remote_host->simdata)->mbox[channel],
+			task);
+			if (task->simdata->receiver) {
+				task->simdata->receiver->simdata->waiting_task = NULL;
+			}
+			task->simdata->sender = NULL;
+			SIMIX_mutex_unlock(task->simdata->mutex);
+			MSG_RETURN(MSG_TRANSFER_FAILURE);
+		}
+	}
+	else {
+		SIMIX_cond_wait(task->simdata->cond,task->simdata->mutex);
+	}
 
-  PAJE_PROCESS_POP_STATE(process);  
+	DEBUG1("Action terminated %s",task->name);    
+	task->simdata->using--;
+	process->simdata->waiting_task = NULL;
+	/* the task has already finished and the pointer must be null*/
+	if (task->simdata->receiver) {
+		task->simdata->receiver->simdata->waiting_task = NULL;
+		/* action ended, set comm and compute = NULL, the actions is already destroyed in the main function */
+	//	task->simdata->comm = NULL;
+		//task->simdata->compute = NULL;
+	}
+	task->simdata->sender = NULL;
+	SIMIX_mutex_unlock(task->simdata->mutex);
 
-  if(state == SURF_ACTION_DONE) {
-    if(surf_workstation_resource->common_public->action_free(task_simdata->comm)) 
-      task_simdata->comm = NULL;
-    MSG_task_destroy(task);
+	if(SIMIX_action_get_state(task->simdata->comm) == SURF_ACTION_DONE) {
     MSG_RETURN(MSG_OK);
-  } else if(surf_workstation_resource->extension_public->get_state(local_host->simdata->host) 
-	    == SURF_CPU_OFF) {
-    if(surf_workstation_resource->common_public->action_free(task_simdata->comm)) 
-      task_simdata->comm = NULL;
-    MSG_task_destroy(task);
+	} else if (SIMIX_host_get_state(local_host->simdata->s_host)==0) {
     MSG_RETURN(MSG_HOST_FAILURE);
   } else { 
-    if(surf_workstation_resource->common_public->action_free(task_simdata->comm)) 
-      task_simdata->comm = NULL;
-    MSG_task_destroy(task);
     MSG_RETURN(MSG_TRANSFER_FAILURE);
   }
 }
+
 /** \ingroup msg_gos_functions
  * \brief Put a task on a channel of an host and waits for the end of the
  * transmission.
@@ -572,73 +548,51 @@ MSG_error_t MSG_task_put_bounded(m_task_t task,
  */
 MSG_error_t MSG_task_execute(m_task_t task)
 {
-  m_process_t process = MSG_process_self();
-  MSG_error_t res;
-
-  DEBUG1("Computing on %s", process->simdata->host->name);
-
-  __MSG_task_execute(process, task);
-
-  PAJE_PROCESS_PUSH_STATE(process,"E",task);  
-  res = __MSG_wait_for_computation(process,task);
-  PAJE_PROCESS_POP_STATE(process);
-  return res;
-}
-
-void __MSG_task_execute(m_process_t process, m_task_t task)
-{
-  simdata_task_t simdata = NULL;
-
+	simdata_task_t simdata = NULL;
+	m_process_t self = MSG_process_self();
   CHECK_HOST();
 
   simdata = task->simdata;
   xbt_assert0((!simdata->compute)&&(task->simdata->using==1),
-	      "This taks is executed somewhere else. Go fix your code!");
+	      "This task is executed somewhere else. Go fix your code!");
+	
+	DEBUG1("Computing on %s", MSG_process_self()->simdata->m_host->name);
   simdata->using++;
-  simdata->compute = surf_workstation_resource->extension_public->
-    execute(MSG_process_get_host(process)->simdata->host,
-	    simdata->computation_amount);
-  surf_workstation_resource->common_public->
-    set_priority(simdata->compute, simdata->priority);
+	SIMIX_mutex_lock(simdata->mutex);
+  simdata->compute = SIMIX_action_execute(SIMIX_host_self(), task->name, simdata->computation_amount);
+	SIMIX_action_set_priority(simdata->compute, simdata->priority);
 
-  surf_workstation_resource->common_public->action_set_data(simdata->compute,task);
-  simdata->using--;
-}
-
-MSG_error_t __MSG_wait_for_computation(m_process_t process, m_task_t task)
-{
-  e_surf_action_state_t state = SURF_ACTION_NOT_IN_THE_SYSTEM;
-  simdata_task_t simdata = task->simdata;
+	self->simdata->waiting_task = task;
+	SIMIX_register_action_to_condition(simdata->compute, simdata->cond);
+	SIMIX_cond_wait(simdata->cond, simdata->mutex);
+	self->simdata->waiting_task = NULL;
 
-  XBT_IN4("(%p(%s) %p(%s))",process,process->name,task,task->name);
-  simdata->using++;
-  do {
-    __MSG_task_wait_event(process, task);
-    state=surf_workstation_resource->common_public->action_get_state(simdata->compute);
-  } while (state==SURF_ACTION_RUNNING);
+	SIMIX_mutex_unlock(simdata->mutex);
   simdata->using--;
-    
 
-  if(state == SURF_ACTION_DONE) {
-    if(surf_workstation_resource->common_public->action_free(simdata->compute)) 
-      simdata->compute = NULL;
-    simdata->computation_amount = 0.0;
-    XBT_OUT;
+	if(SIMIX_action_get_state(task->simdata->compute) == SURF_ACTION_DONE) {
+		/* action ended, set comm and compute = NULL, the actions is already destroyed in the main function */
+		SIMIX_action_destroy(task->simdata->compute);
+		simdata->computation_amount = 0.0;
+		simdata->comm = NULL;
+		simdata->compute = NULL;
     MSG_RETURN(MSG_OK);
-  } else if(surf_workstation_resource->extension_public->
-	    get_state(MSG_process_get_host(process)->simdata->host) 
-	    == SURF_CPU_OFF) {
-    if(surf_workstation_resource->common_public->action_free(simdata->compute)) 
-      simdata->compute = NULL;
-    XBT_OUT;
+	} else if (SIMIX_host_get_state(SIMIX_host_self())==0) {
+		/* action ended, set comm and compute = NULL, the actions is already destroyed in the main function */
+		SIMIX_action_destroy(task->simdata->compute);
+		simdata->comm = NULL;
+		simdata->compute = NULL;
     MSG_RETURN(MSG_HOST_FAILURE);
-  } else {
-    if(surf_workstation_resource->common_public->action_free(simdata->compute)) 
-      simdata->compute = NULL;
-    XBT_OUT;
+  } else { 
+		/* action ended, set comm and compute = NULL, the actions is already destroyed in the main function */
+		SIMIX_action_destroy(task->simdata->compute);
+		simdata->comm = NULL;
+		simdata->compute = NULL;
     MSG_RETURN(MSG_TASK_CANCELLED);
   }
 }
+
+
 /** \ingroup m_task_management
  * \brief Creates a new #m_task_t (a parallel one....).
  *
@@ -665,70 +619,88 @@ m_task_t MSG_parallel_task_create(const char *name,
 				  double *communication_amount,
 				  void *data)
 {
+  int i;
   simdata_task_t simdata = xbt_new0(s_simdata_task_t,1);
   m_task_t task = xbt_new0(s_m_task_t,1);
-  int i;
+  task->simdata = simdata;
 
   /* Task structure */
   task->name = xbt_strdup(name);
-  task->simdata = simdata;
   task->data = data;
 
   /* Simulator Data */
-  simdata->sleeping = xbt_dynar_new(sizeof(m_process_t),NULL);
+  simdata->computation_amount = 0;
+  simdata->message_size = 0;
+	simdata->cond = SIMIX_cond_init();
+	simdata->mutex = SIMIX_mutex_init();
+	simdata->compute = NULL;
+	simdata->comm = NULL;
   simdata->rate = -1.0;
   simdata->using = 1;
   simdata->sender = NULL;
+  simdata->receiver = NULL;
   simdata->source = NULL;
+
   simdata->host_nb = host_nb;
-  
   simdata->host_list = xbt_new0(void *, host_nb);
   simdata->comp_amount = computation_amount;
   simdata->comm_amount = communication_amount;
 
   for(i=0;i<host_nb;i++)
-    simdata->host_list[i] = host_list[i]->simdata->host;
+    simdata->host_list[i] = host_list[i]->simdata->s_host;
 
   return task;
+
 }
 
 
-static void __MSG_parallel_task_execute(m_process_t process, m_task_t task)
+MSG_error_t MSG_parallel_task_execute(m_task_t task)
 {
-  simdata_task_t simdata = NULL;
-
+	simdata_task_t simdata = NULL;
+	m_process_t self = MSG_process_self();
   CHECK_HOST();
 
   simdata = task->simdata;
+  xbt_assert0((!simdata->compute)&&(task->simdata->using==1),
+	      "This task is executed somewhere else. Go fix your code!");
 
   xbt_assert0(simdata->host_nb,"This is not a parallel task. Go to hell.");
+	
+	DEBUG1("Computing on %s", MSG_process_self()->simdata->m_host->name);
+  simdata->using++;
+	SIMIX_mutex_lock(simdata->mutex);
+  simdata->compute = SIMIX_action_parallel_execute(task->name, simdata->host_nb, simdata->host_list, simdata->comp_amount, simdata->comm_amount, 1.0, -1.0);
 
-  simdata->compute = surf_workstation_resource->extension_public->
-  execute_parallel_task(task->simdata->host_nb,
-			task->simdata->host_list,
-			task->simdata->comp_amount,
-			task->simdata->comm_amount,
-			1.0,
-			-1.0);
-  if(simdata->compute)
-    surf_workstation_resource->common_public->action_set_data(simdata->compute,task);
-}
+	self->simdata->waiting_task = task;
+	SIMIX_register_action_to_condition(simdata->compute, simdata->cond);
+	SIMIX_cond_wait(simdata->cond, simdata->mutex);
+	self->simdata->waiting_task = NULL;
 
-MSG_error_t MSG_parallel_task_execute(m_task_t task)
-{
-  m_process_t process = MSG_process_self();
-  MSG_error_t res;
 
-  DEBUG0("Computing on a tons of guys");
-  
-  __MSG_parallel_task_execute(process, task);
+	SIMIX_mutex_unlock(simdata->mutex);
+  simdata->using--;
 
-  if(task->simdata->compute)
-    res = __MSG_wait_for_computation(process,task);
-  else 
-    res = MSG_OK;
+	if(SIMIX_action_get_state(task->simdata->compute) == SURF_ACTION_DONE) {
+		/* action ended, set comm and compute = NULL, the actions is already destroyed in the main function */
+		SIMIX_action_destroy(task->simdata->compute);
+		simdata->computation_amount = 0.0;
+		simdata->comm = NULL;
+		simdata->compute = NULL;
+    MSG_RETURN(MSG_OK);
+	} else if (SIMIX_host_get_state(SIMIX_host_self())==0) {
+		/* action ended, set comm and compute = NULL, the actions is already destroyed in the main function */
+		SIMIX_action_destroy(task->simdata->compute);
+		simdata->comm = NULL;
+		simdata->compute = NULL;
+    MSG_RETURN(MSG_HOST_FAILURE);
+  } else { 
+		/* action ended, set comm and compute = NULL, the actions is already destroyed in the main function */
+		SIMIX_action_destroy(task->simdata->compute);
+		simdata->comm = NULL;
+		simdata->compute = NULL;
+    MSG_RETURN(MSG_TASK_CANCELLED);
+  }	
 
-  return res;  
 }
 
 
@@ -741,53 +713,39 @@ MSG_error_t MSG_parallel_task_execute(m_task_t task)
  */
 MSG_error_t MSG_process_sleep(double nb_sec)
 {
-  e_surf_action_state_t state = SURF_ACTION_NOT_IN_THE_SYSTEM;
-  m_process_t process = MSG_process_self();
-  m_task_t dummy = NULL;
-  simdata_task_t simdata = NULL;
-  
-  xbt_assert1(nb_sec>=0,"Invalid duration %g",nb_sec);
-
-  CHECK_HOST();
-  dummy = MSG_task_create("MSG_sleep", nb_sec, 0.0, NULL);
-  simdata = dummy->simdata;
-
-  simdata->compute = surf_workstation_resource->extension_public->
-    sleep(MSG_process_get_host(process)->simdata->host,
-	    simdata->computation_amount);
-  surf_workstation_resource->common_public->action_set_data(simdata->compute,dummy);
-
-  
-  simdata->using++;
-  do {
-    __MSG_task_wait_event(process, dummy);
-    state=surf_workstation_resource->common_public->action_get_state(simdata->compute);
-  } while (state==SURF_ACTION_RUNNING);
-  simdata->using--;
-    
-  if(state == SURF_ACTION_DONE) {
-    if(surf_workstation_resource->extension_public->
-       get_state(MSG_process_get_host(process)->simdata->host) 
-       == SURF_CPU_OFF) {
-      if(surf_workstation_resource->common_public->action_free(simdata->compute)) 
-	simdata->compute = NULL;
-      MSG_RETURN(MSG_HOST_FAILURE);
-    }
-    if(__MSG_process_isBlocked(process)) {
-      __MSG_process_unblock(MSG_process_self());
-    }
-    if(surf_workstation_resource->extension_public->
-       get_state(MSG_process_get_host(process)->simdata->host) 
-       == SURF_CPU_OFF) {
-      if(surf_workstation_resource->common_public->action_free(simdata->compute)) 
-	simdata->compute = NULL;
+	smx_action_t act_sleep;
+	m_process_t proc = MSG_process_self();
+	smx_mutex_t mutex;
+	smx_cond_t cond;
+	/* create action to sleep */
+	act_sleep = SIMIX_action_sleep(SIMIX_process_get_host(proc->simdata->s_process),nb_sec);
+	
+	mutex = SIMIX_mutex_init();
+	SIMIX_mutex_lock(mutex);
+	/* create conditional and register action to it */
+	cond = SIMIX_cond_init();
+
+	SIMIX_register_action_to_condition(act_sleep, cond);
+	SIMIX_cond_wait(cond,mutex);
+	SIMIX_mutex_unlock(mutex);
+
+	/* remove variables */
+	SIMIX_cond_destroy(cond);
+	SIMIX_mutex_destroy(mutex);
+
+  if(SIMIX_action_get_state(act_sleep) == SURF_ACTION_DONE) {
+    if(SIMIX_host_get_state(SIMIX_host_self()) == SURF_CPU_OFF) {
+			SIMIX_action_destroy(act_sleep);
       MSG_RETURN(MSG_HOST_FAILURE);
     }
-    if(surf_workstation_resource->common_public->action_free(simdata->compute)) 
-      simdata->compute = NULL;
-    MSG_task_destroy(dummy);
-    MSG_RETURN(MSG_OK);
-  } else MSG_RETURN(MSG_HOST_FAILURE);
+  }
+	else {
+		SIMIX_action_destroy(act_sleep);
+		MSG_RETURN(MSG_HOST_FAILURE);
+	}
+
+
+	MSG_RETURN(MSG_OK);
 }
 
 /** \ingroup msg_gos_functions
@@ -796,13 +754,8 @@ MSG_error_t MSG_process_sleep(double nb_sec)
  */
 static int MSG_get_msgload(void) 
 {
-  m_process_t process;
-   
-  CHECK_HOST();
-  
-  xbt_assert0(0, "This function is still to be specified correctly (what do you mean by 'load', exactly?). In the meantime, please don't use it");
-  process = MSG_process_self();
-  return xbt_fifo_size(process->simdata->host->simdata->process_list);
+	xbt_die("not implemented yet");
+	return 0;
 }
 
 /** \ingroup msg_gos_functions