X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/444fd32bb5976fd3fd81197e6c321f21a5ed34b2..d74bb413a4b25a580d7cfc96065b638292a2e679:/src/msg/task.c

diff --git a/src/msg/task.c b/src/msg/task.c
index 84d6f90b38..e3bf5c158a 100644
--- a/src/msg/task.c
+++ b/src/msg/task.c
@@ -1,17 +1,21 @@
-/* 	$Id$	 */
+/*     $Id$      */
 
-/* Copyright (c) 2002,2003,2004 Arnaud Legrand. All rights reserved.        */
+/* 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"
 
 /** \defgroup m_task_management Managing functions of Tasks
  *  \brief This section describes the task structure of MSG
  *  (#m_task_t) and the functions for managing it.
+ */
+/** @addtogroup m_task_management
  *    \htmlonly <!-- DOXYGEN_NAVBAR_LABEL="Tasks" --> \endhtmlonly
  * 
  *  Since most scheduling algorithms rely on a concept of task
@@ -30,10 +34,10 @@
    corresponding object.
  * \param name a name for the object. It is for user-level information
    and can be NULL.
- * \param compute_duration a value of the processing amount (in Mflop)
+ * \param compute_duration a value of the processing amount (in flop)
    needed to process this new task. If 0, then it cannot be executed with
    MSG_task_execute(). This value has to be >=0.
- * \param message_size a value of the amount of data (in Mb) needed to
+ * \param message_size a value of the amount of data (in bytes) needed to
    transfer this new task. If 0, then it cannot be transfered with
    MSG_task_get() and MSG_task_put(). This value has to be >=0.
  * \param data a pointer to any data may want to attach to the new
@@ -43,32 +47,47 @@
  * \return The new corresponding object.
  */
 m_task_t MSG_task_create(const char *name, double compute_duration,
-			 double message_size, void *data)
+                         double message_size, void *data)
 {
-  simdata_task_t simdata = xbt_new0(s_simdata_task_t,1);
-  m_task_t task = xbt_new0(s_m_task_t,1);
-  
+  m_task_t task = xbt_new(s_m_task_t, 1);
+  simdata_task_t simdata = xbt_new(s_simdata_task_t, 1);
+  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 = compute_duration;
   simdata->message_size = message_size;
   simdata->rate = -1.0;
   simdata->priority = 1.0;
-  simdata->using = 1;
+  simdata->refcount = 1;
   simdata->sender = NULL;
+  simdata->receiver = NULL;
+  simdata->cond = SIMIX_cond_init();
+  simdata->mutex = SIMIX_mutex_init();
+  simdata->compute = NULL;
+  simdata->comm = NULL;
+
+  simdata->host_list = NULL;
+  simdata->comp_amount = NULL;
+  simdata->comm_amount = NULL;
+#ifdef HAVE_TRACING
+  TRACE_msg_task_create (task);
+#endif
 
   return task;
 }
 
+/** prevent the task from being destroyed too quickly (but also prevent it from being sent). Mainly useful in bindings */
+void MSG_task_ref(m_task_t t) {
+  t->simdata->refcount++;
+}
+
 /** \ingroup m_task_management
  * \brief Return the user data of a #m_task_t.
  *
- * This functions checks whether \a task is a valid pointer or not and return
+ * This function checks whether \a task is a valid pointer or not and return
    the user data associated to \a task if it is possible.
  */
 void *MSG_task_get_data(m_task_t task)
@@ -78,6 +97,19 @@ void *MSG_task_get_data(m_task_t task)
   return (task->data);
 }
 
+/** \ingroup m_task_management
+ * \brief Sets the user data of a #m_task_t.
+ *
+ * This function allows to associate a new pointer to
+   the user data associated of \a task.
+ */
+void MSG_task_set_data(m_task_t task,void *data)
+{
+  xbt_assert0((task != NULL), "Invalid parameter");
+
+  task->data = data;
+}
+
 /** \ingroup m_task_management
  * \brief Return the sender of a #m_task_t.
  *
@@ -85,8 +117,8 @@ void *MSG_task_get_data(m_task_t task)
  */
 m_process_t MSG_task_get_sender(m_task_t task)
 {
-   xbt_assert0(task, "Invalid parameters");
-   return ((simdata_task_t) task->simdata)->sender;
+  xbt_assert0(task, "Invalid parameters");
+  return ((simdata_task_t) task->simdata)->sender;
 }
 
 /** \ingroup m_task_management
@@ -96,8 +128,8 @@ m_process_t MSG_task_get_sender(m_task_t task)
  */
 m_host_t MSG_task_get_source(m_task_t task)
 {
-   xbt_assert0(task, "Invalid parameters");
-   return ((simdata_task_t) task->simdata)->source;
+  xbt_assert0(task, "Invalid parameters");
+  return ((simdata_task_t) task->simdata)->source;
 }
 
 /** \ingroup m_task_management
@@ -107,8 +139,8 @@ m_host_t MSG_task_get_source(m_task_t task)
  */
 const char *MSG_task_get_name(m_task_t task)
 {
-   xbt_assert0(task, "Invalid parameters");
-   return task->name;
+  xbt_assert0(task, "Invalid parameters");
+  return task->name;
 }
 
 
@@ -120,28 +152,34 @@ const char *MSG_task_get_name(m_task_t task)
  */
 MSG_error_t MSG_task_destroy(m_task_t task)
 {
-  surf_action_t action = NULL;
-
+  smx_action_t action = NULL;
   xbt_assert0((task != NULL), "Invalid parameter");
 
-  task->simdata->using--;
-  if(task->simdata->using>0) return MSG_OK;
-
-  xbt_assert0((xbt_dynar_length(task->simdata->sleeping)==0), 
-	      "Task still used. There is a problem. Cannot destroy it now!");
+  /* why? if somebody is using, then you can't free! ok... but will return MSG_OK? when this task will be destroyed? isn't the user code wrong? */
+  task->simdata->refcount--;
+  if (task->simdata->refcount > 0)
+    return MSG_OK;
+#ifdef HAVE_TRACING
+  TRACE_msg_task_destroy (task);
+#endif
 
-  if(task->name) free(task->name);
+  if (task->name)
+    free(task->name);
 
-  xbt_dynar_free(&(task->simdata->sleeping));
+  SIMIX_cond_destroy(task->simdata->cond);
+  SIMIX_mutex_destroy(task->simdata->mutex);
 
   action = task->simdata->compute;
-  if(action) action->resource_type->common_public->action_free(action);
-  action = task->simdata->comm;
-  if(action) action->resource_type->common_public->action_free(action);
-  if(task->simdata->host_list) xbt_free(task->simdata->host_list);
+  if (action)
+    SIMIX_action_destroy(action);
+  
+  /* parallel tasks only */
+  if (task->simdata->host_list)
+    xbt_free(task->simdata->host_list);
 
-  free(task->simdata);
-  free(task);
+  /* free main structures */
+  xbt_free(task->simdata);
+  xbt_free(task);
 
   return MSG_OK;
 }
@@ -156,24 +194,25 @@ MSG_error_t MSG_task_cancel(m_task_t task)
 {
   xbt_assert0((task != NULL), "Invalid parameter");
 
-  if(task->simdata->compute) {
-    surf_workstation_resource->common_public->action_cancel(task->simdata->compute);
+  if (task->simdata->compute) {
+    SIMIX_action_cancel(task->simdata->compute);
     return MSG_OK;
   }
-  if(task->simdata->comm) {
-    surf_workstation_resource->common_public->action_cancel(task->simdata->comm);
+  if (task->simdata->comm) {
+    SIMIX_communication_cancel(task->simdata->comm);
     return MSG_OK;
   }
-
-  return MSG_FATAL;
+  THROW_IMPOSSIBLE;
 }
 
 /** \ingroup m_task_management
  * \brief Returns the computation amount needed to process a task #m_task_t.
  *        Once a task has been processed, this amount is thus set to 0...
  */
-double MSG_task_get_compute_duration(m_task_t task) {
-  xbt_assert0((task != NULL) && (task->simdata != NULL), "Invalid parameter");
+double MSG_task_get_compute_duration(m_task_t task)
+{
+  xbt_assert0((task != NULL)
+              && (task->simdata != NULL), "Invalid parameter");
 
   return task->simdata->computation_amount;
 }
@@ -184,57 +223,59 @@ double MSG_task_get_compute_duration(m_task_t task) {
  */
 double MSG_task_get_remaining_computation(m_task_t task)
 {
-  xbt_assert0((task != NULL) && (task->simdata != NULL), "Invalid parameter");
+  xbt_assert0((task != NULL)
+              && (task->simdata != NULL), "Invalid parameter");
 
-  if(task->simdata->compute) {
-    return task->simdata->compute->remains;
+  if (task->simdata->compute) {
+    return SIMIX_action_get_remains(task->simdata->compute);
   } else {
     return task->simdata->computation_amount;
   }
 }
 
+
+
 /** \ingroup m_task_management
- * \brief Returns the size of the data attached to a task #m_task_t.
+ * \brief Returns the total amount received by a task #m_task_t.
  *
  */
-double MSG_task_get_data_size(m_task_t task) {
-  xbt_assert0((task != NULL) && (task->simdata != NULL), "Invalid parameter");
+double MSG_task_get_remaining_communication(m_task_t task)
+{
+  xbt_assert0((task != NULL)
+              && (task->simdata != NULL), "Invalid parameter");
 
-  return task->simdata->message_size;
+  return SIMIX_communication_get_remains(task->simdata->comm);
 }
 
-MSG_error_t __MSG_task_wait_event(m_process_t process, m_task_t task)
+/** \ingroup m_task_management
+ * \brief Returns the size of the data attached to a task #m_task_t.
+ *
+ */
+double MSG_task_get_data_size(m_task_t task)
 {
-  int _cursor;
-  m_process_t proc = NULL;
-
-  xbt_assert0(((task != NULL)
-	       && (task->simdata != NULL)), "Invalid parameters");
-
-  xbt_dynar_push(task->simdata->sleeping, &process);
-  process->simdata->waiting_task = task;
-  xbt_context_yield();
-  process->simdata->waiting_task = NULL;
-  xbt_dynar_foreach(task->simdata->sleeping,_cursor,proc) {
-    if(proc==process) 
-      xbt_dynar_remove_at(task->simdata->sleeping,_cursor,&proc);
-  }
+  xbt_assert0((task != NULL)
+              && (task->simdata != NULL), "Invalid parameter");
 
-  return MSG_OK;
+  return task->simdata->message_size;
 }
 
 
+
 /** \ingroup m_task_management
  * \brief Changes the priority of a computation task. This priority doesn't affect 
  *        the transfer rate. A priority of 2 will make a task receive two times more
  *        cpu power than the other ones.
  *
  */
-void MSG_task_set_priority(m_task_t task, double priority) {
-  xbt_assert0((task != NULL) && (task->simdata != NULL), "Invalid parameter");
+void MSG_task_set_priority(m_task_t task, double priority)
+{
+  xbt_assert0((task != NULL)
+              && (task->simdata != NULL), "Invalid parameter");
 
-  task->simdata->priority = 1/priority;
-  if(task->simdata->compute)
-    surf_workstation_resource->common_public->
-      set_priority(task->simdata->compute, task->simdata->priority);
+  task->simdata->priority = 1 / priority;
+  if (task->simdata->compute)
+    SIMIX_action_set_priority(task->simdata->compute,
+                              task->simdata->priority);
 }
+
+