X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/ad452c358d2b00bbabcd8f10e54a36b3c56985de..c7d081152701ce55594a9527980cd94891d239d2:/src/msg/gos.c

diff --git a/src/msg/gos.c b/src/msg/gos.c
index 2bb88bf9af..ae67680dd9 100644
--- a/src/msg/gos.c
+++ b/src/msg/gos.c
@@ -5,26 +5,21 @@
 /* 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"xbt/sysdep.h"
-#include "xbt/error.h"
+#include "private.h"
+#include "xbt/sysdep.h"
+#include "xbt/log.h"
 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(gos, msg,
 				"Logging specific to MSG (gos)");
 
-/** \ingroup msg_gos_functions
- * \brief This function is now deprecated and useless. Please stop using it.
+/** \defgroup msg_gos_functions MSG Operating System Functions
+ *  \brief This section describes the functions that can be used
+ *  by an agent for handling some task.
  */
-MSG_error_t MSG_process_start(m_process_t process)
-{
-  xbt_assert0(0,"This function is now deprecated and useless. Please stop using it.");
-  
-  return MSG_OK;
-}
 
 /** \ingroup msg_gos_functions
  * \brief Listen on a channel and wait for receiving a task.
  *
- * It takes two parameter.
+ * It takes two parameters.
  * \param task a memory location for storing a #m_task_t. It will
    hold a task when this function will return. Thus \a task should not
    be equal to \c NULL and \a *task should be equal to \c NULL. If one of
@@ -37,16 +32,42 @@ MSG_error_t MSG_process_start(m_process_t process)
  */
 MSG_error_t MSG_task_get(m_task_t * task,
 			 m_channel_t channel)
+{
+  return MSG_task_get_with_time_out(task, channel, -1);
+}
+
+/** \ingroup msg_gos_functions
+ * \brief Listen on a channel and wait for receiving a task with a timeout.
+ *
+ * It takes three parameters.
+ * \param task a memory location for storing a #m_task_t. It will
+   hold a task when this function will return. Thus \a task should not
+   be equal to \c NULL and \a *task should be equal to \c NULL. If one of
+   those two condition does not hold, there will be a warning message.
+ * \param channel the channel on which the agent should be
+   listening. This value has to be >=0 and < than the maximal
+   number of channels fixed with MSG_set_channel_number().
+ * \param max_duration the maximum time to wait for a task before giving
+    up. In such a case, \a task will not be modified and will still be
+    equal to \c NULL when returning.
+ * \return #MSG_FATAL if \a task is equal to \c NULL, #MSG_WARNING
+   if \a *task is not equal to \c NULL, and #MSG_OK otherwise.
+ */
+
+MSG_error_t MSG_task_get_with_time_out(m_task_t * task,
+				       m_channel_t channel,
+				       double max_duration)
 {
   m_process_t process = MSG_process_self();
   m_task_t t = NULL;
   m_host_t h = NULL;
   simdata_task_t t_simdata = NULL;
   simdata_host_t h_simdata = NULL;
-  int warning = 0;
+  int first_time = 1;
   e_surf_action_state_t state = SURF_ACTION_NOT_IN_THE_SYSTEM;
   
   CHECK_HOST();
+  xbt_assert1((channel>=0) && (channel < msg_global->max_channel),"Invalid channel %d",channel);
   /* Sanity check */
   xbt_assert0(task,"Null pointer for the task\n");
 
@@ -56,17 +77,30 @@ MSG_error_t MSG_task_get(m_task_t * task,
   /* Get the task */
   h = MSG_host_self();
   h_simdata = h->simdata;
-  while ((t = xbt_fifo_pop(h_simdata->mbox[channel])) == NULL) {
+
+  DEBUG2("Waiting for a task on channel %d (%s)", channel,h->name);
+
+  while ((t = xbt_fifo_shift(h_simdata->mbox[channel])) == NULL) {
+    if(max_duration>0) {
+      if(!first_time) {
+	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 */
-    __MSG_process_block();
+    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;
     /* OK, we should both be ready now. Are you there ? */
   }
 
@@ -98,14 +132,23 @@ MSG_error_t MSG_task_get(m_task_t * task,
     xbt_context_yield();
   }
 
-  PAJE_PROCESS_POP_STATE(process);  
+  PAJE_PROCESS_POP_STATE(process);
   PAJE_COMM_STOP(process,t,channel);
 
-  if(state == SURF_ACTION_DONE) MSG_RETURN(MSG_OK);
-  else if(surf_workstation_resource->extension_public->get_state(h_simdata->host) 
-	  == SURF_CPU_OFF)
+  if(state == SURF_ACTION_DONE) {
+    if(surf_workstation_resource->common_public->action_free(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;
     MSG_RETURN(MSG_HOST_FAILURE);
-  else MSG_RETURN(MSG_TRANSFER_FAILURE);
+  } else {
+    if(surf_workstation_resource->common_public->action_free(t_simdata->comm)) 
+      t_simdata->comm = NULL;
+    MSG_RETURN(MSG_TRANSFER_FAILURE);
+  }
 }
 
 /** \ingroup msg_gos_functions
@@ -122,10 +165,12 @@ int MSG_task_Iprobe(m_channel_t channel)
   m_host_t h = NULL;
   simdata_host_t h_simdata = 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();
   h = MSG_host_self();
   h_simdata = h->simdata;
-  return(xbt_fifo_getFirstItem(h_simdata->mbox[channel])!=NULL);
+  return(xbt_fifo_get_first_item(h_simdata->mbox[channel])!=NULL);
 }
 
 /** \ingroup msg_gos_functions
@@ -144,17 +189,75 @@ int MSG_task_probe_from(m_channel_t channel)
   xbt_fifo_item_t item;
   m_task_t t;
 
+  xbt_assert1((channel>=0) && (channel < msg_global->max_channel),"Invalid channel %d",channel);
   CHECK_HOST();
   h = MSG_host_self();
   h_simdata = h->simdata;
+
+  DEBUG2("Probing on channel %d (%s)", channel,h->name);
    
-  item = xbt_fifo_getFirstItem(((simdata_host_t)h->simdata)->mbox[channel]);
-  if (!item || !(t = xbt_fifo_get_item_content(item)) || (simdata_task_t)t->simdata)
+  item = xbt_fifo_get_first_item(h->simdata->mbox[channel]);
+  if (!item || !(t = xbt_fifo_get_item_content(item)))
     return -1;
    
-  return MSG_process_get_PID(((simdata_task_t)t->simdata)->sender);
+  return MSG_process_get_PID(t->simdata->sender);
 }
 
+MSG_error_t MSG_channel_select_from(m_channel_t channel, double max_duration,
+				    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;
+  }
+
+  if(max_duration==0.0) {
+    return MSG_task_probe_from(channel);
+  } 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);
+	}
+      }
+      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);
+  }
+}
 /** \ingroup msg_gos_functions
  * \brief Put a task on a channel of an host and waits for the end of the
  * transmission.
@@ -189,6 +292,8 @@ MSG_error_t MSG_task_put(m_task_t task,
 
   CHECK_HOST();
 
+  xbt_assert1((channel>=0) && (channel < msg_global->max_channel),"Invalid channel %d",channel);
+
   task_simdata = task->simdata;
   task_simdata->sender = process;
   xbt_assert0(task_simdata->using==1,"Gargl!");
@@ -197,6 +302,9 @@ MSG_error_t MSG_task_put(m_task_t task,
   local_host = ((simdata_process_t) process->simdata)->host;
   remote_host = dest;
 
+  DEBUG4("Trying to send a task (%g Mb) from %s to %s on channel %d", 
+	 task->simdata->message_size,local_host->name, remote_host->name, channel);
+
   xbt_fifo_push(((simdata_host_t) remote_host->simdata)->
 		mbox[channel], task);
 
@@ -208,7 +316,8 @@ MSG_error_t MSG_task_put(m_task_t task,
   process->simdata->put_host = dest;
   process->simdata->put_channel = channel;
   while(!(task_simdata->comm)) 
-    __MSG_process_block();
+    __MSG_process_block(-1);
+  surf_workstation_resource->common_public->action_use(task_simdata->comm);
   process->simdata->put_host = NULL;
   process->simdata->put_channel = -1;
 
@@ -221,15 +330,26 @@ MSG_error_t MSG_task_put(m_task_t task,
     state=surf_workstation_resource->common_public->action_get_state(task_simdata->comm);
   }
     
-  MSG_task_destroy(task);
 
   PAJE_PROCESS_POP_STATE(process);  
 
-  if(state == SURF_ACTION_DONE) MSG_RETURN(MSG_OK);
-  else if(surf_workstation_resource->extension_public->get_state(local_host->simdata->host) 
-	  == SURF_CPU_OFF)
+  if(state == SURF_ACTION_DONE) {
+    if(surf_workstation_resource->common_public->action_free(task_simdata->comm)) 
+      task_simdata->comm = NULL;
+    MSG_task_destroy(task);
+    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);
     MSG_RETURN(MSG_HOST_FAILURE);
-  else MSG_RETURN(MSG_TRANSFER_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
@@ -240,11 +360,13 @@ MSG_error_t MSG_task_put(m_task_t task,
  */
 MSG_error_t MSG_task_put_bounded(m_task_t task,
 				 m_host_t dest, m_channel_t channel,
-				 long double max_rate)
+				 double max_rate)
 {
+  MSG_error_t res = MSG_OK;
   task->simdata->rate=max_rate;
-  return(MSG_task_put(task, dest, channel));
+  res = MSG_task_put(task, dest, channel);
   task->simdata->rate=-1.0;
+  return(res);
 }
 
 /** \ingroup msg_gos_functions
@@ -261,6 +383,9 @@ 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");  
@@ -280,6 +405,9 @@ void __MSG_task_execute(m_process_t process, m_task_t task)
   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);
+
   surf_workstation_resource->common_public->action_set_data(simdata->compute,task);
 }
 
@@ -296,13 +424,114 @@ MSG_error_t __MSG_wait_for_computation(m_process_t process, m_task_t task)
   simdata->using--;
     
 
-  if(state == SURF_ACTION_DONE) MSG_RETURN(MSG_OK);
-  else if(surf_workstation_resource->extension_public->
-	  get_state(MSG_process_get_host(process)->simdata->host) 
-	  == SURF_CPU_OFF)
+  if(state == SURF_ACTION_DONE) {
+    if(surf_workstation_resource->common_public->action_free(simdata->compute)) 
+      simdata->compute = NULL;
+    simdata->computation_amount = 0.0;
+    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;
     MSG_RETURN(MSG_HOST_FAILURE);
-  else MSG_RETURN(MSG_TRANSFER_FAILURE);
+  } else {
+    if(surf_workstation_resource->common_public->action_free(simdata->compute)) 
+      simdata->compute = NULL;
+    MSG_RETURN(MSG_TASK_CANCELLED);
+  }
 }
+/** \ingroup m_task_management
+ * \brief Creates a new #m_task_t (a parallel one....).
+ *
+ * A constructor for #m_task_t taking six arguments and returning the 
+   corresponding object.
+ * \param name a name for the object. It is for user-level information
+   and can be NULL.
+ * \param host_nb the number of hosts implied in the parallel task.
+ * \param host_list an array of #host_nb m_host_t.
+ * \param computation_amount an array of #host_nb
+   doubles. computation_amount[i] is the total number of operations
+   that have to be performed on host_list[i].
+ * \param communication_amount an array of #host_nb*#host_nb doubles.
+ * \param data a pointer to any data 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 MSG_task_get_data.
+ * \see m_task_t
+ * \return The new corresponding object.
+ */
+m_task_t MSG_parallel_task_create(const char *name, 
+				  int host_nb,
+				  const m_host_t *host_list,
+				  double *computation_amount,
+				  double *communication_amount,
+				  void *data)
+{
+  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 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->rate = -1.0;
+  simdata->using = 1;
+  simdata->sender = 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;
+
+  return task;
+}
+
+
+static void __MSG_parallel_task_execute(m_process_t process, m_task_t task)
+{
+  simdata_task_t simdata = NULL;
+
+  CHECK_HOST();
+
+  simdata = task->simdata;
+
+  xbt_assert0(simdata->host_nb,"This is not a parallel task. Go to hell.");
+
+  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);
+}
+
+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);
+
+  if(task->simdata->compute)
+    res = __MSG_wait_for_computation(process,task);
+  else 
+    res = MSG_OK;
+
+  return res;  
+}
+
 
 /** \ingroup msg_gos_functions
  * \brief Sleep for the specified number of seconds
@@ -311,7 +540,7 @@ MSG_error_t __MSG_wait_for_computation(m_process_t process, m_task_t task)
  *
  * \param nb_sec a number of second
  */
-MSG_error_t MSG_process_sleep(long double nb_sec)
+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();
@@ -338,16 +567,23 @@ MSG_error_t MSG_process_sleep(long double nb_sec)
   if(state == SURF_ACTION_DONE) {
     if(surf_workstation_resource->extension_public->
        get_state(MSG_process_get_host(process)->simdata->host) 
-       == SURF_CPU_OFF)
+       == 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)
+       == SURF_CPU_OFF) {
+      if(surf_workstation_resource->common_public->action_free(simdata->compute)) 
+	simdata->compute = NULL;
       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);
@@ -357,12 +593,15 @@ MSG_error_t MSG_process_sleep(long double nb_sec)
  * \brief Return the number of MSG tasks currently running on a
  * the host of the current running process.
  */
-int MSG_get_msgload(void) 
+static int MSG_get_msgload(void) 
 {
+  m_process_t process;
+   
   CHECK_HOST();
-  xbt_assert0(0,"Not implemented yet!");
   
-  return 1;
+  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);
 }
 
 /** \ingroup msg_gos_functions