X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/e1686afc63c9643f647b5d44a64fdf4665e88ddd..1cde906ff21eb6a3dd34cce742b544e1ddcb8994:/src/simix/smx_process.c

diff --git a/src/simix/smx_process.c b/src/simix/smx_process.c
index d7a9f44986..e0c849ca70 100644
--- a/src/simix/smx_process.c
+++ b/src/simix/smx_process.c
@@ -16,23 +16,53 @@ XBT_LOG_NEW_DEFAULT_SUBCATEGORY(simix_process, simix,
 
 /******************************** Process ************************************/
 /**
- * \brief Creates and runs a new #smx_process_t.
+ * \brief Move a process to the list of process to destroy. *
+ */
+void SIMIX_process_cleanup(void *arg)
+{
+  xbt_swag_remove(arg, simix_global->process_to_run);
+  xbt_swag_remove(arg, simix_global->process_list);
+  xbt_swag_remove(arg, ((smx_process_t)arg)->smx_host->process_list);
+  xbt_swag_insert(arg, simix_global->process_to_destroy);
+}
+
+/** 
+ * Garbage collection
  *
- * Does exactly the same as #SIMIX_process_create_with_arguments but without
-   providing standard arguments (\a argc, \a argv).
- * \see SIMIX_process_create_with_arguments
+ * Should be called some time to time to free the memory allocated for processes
+ * that have finished (or killed).
  */
+void SIMIX_process_empty_trash(void)
+{ 
+  smx_process_t process = NULL;
 
+  while ((process = xbt_swag_extract(simix_global->process_to_destroy))){
+    SIMIX_context_free(process->context);
+    free(process->name);
+    process->name = NULL;
+    free(process);
+  }
+}
 
-void SIMIX_process_cleanup(void *arg)
+/**
+ * \brief Creates and runs the maestro process
+ */
+void __SIMIX_create_maestro_process()
 {
-  xbt_swag_remove(arg, simix_global->process_list);
-  xbt_swag_remove(arg, simix_global->process_to_run);
-  xbt_swag_remove(arg,((smx_process_t) arg)->smx_host->process_list);
-  free(((smx_process_t) arg)->name);
-  ((smx_process_t) arg)->name = NULL;
+  smx_process_t process = NULL;
+  process = xbt_new0(s_smx_process_t, 1);
+
+  /* Process data */
+  process->name = (char *)"";
 
-  free(arg);
+  /* Create the right context type */
+  process->context = SIMIX_context_create_maestro();
+
+  /* Set it as the maestro process */
+  simix_global->maestro_process = process;
+  simix_global->current_process = process;
+
+  return;
 }
 
 /**
@@ -41,7 +71,7 @@ void SIMIX_process_cleanup(void *arg)
  * A constructor for #m_process_t taking four arguments and returning the corresponding object. The structure (and the corresponding thread) is created, and put in the list of ready process.
  *
  * \param name a name for the object. It is for user-level information and can be NULL.
-* \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 MSG_process_get_data.
+ * \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 MSG_process_get_data.
  * \param host the location where the new agent is executed.
  * \param argc first argument passed to \a code
  * \param argv second argument passed to \a code
@@ -55,7 +85,6 @@ smx_process_t SIMIX_process_create(const char *name,
                                    char **argv, xbt_dict_t properties)
 {
   smx_process_t process = NULL;
-  smx_process_t self = NULL;
   smx_host_t host = SIMIX_host_get_by_name(hostname);
 
   DEBUG2("Start process %s on host %s", name, hostname);
@@ -65,21 +94,21 @@ smx_process_t SIMIX_process_create(const char *name,
     return NULL;
   }
   process = xbt_new0(s_smx_process_t, 1);
-  /*char alias[MAX_ALIAS_NAME + 1] = {0};
-     msg_mailbox_t mailbox; */
 
   xbt_assert0(((code != NULL) && (host != NULL)), "Invalid parameters");
 
   /* Process data */
   process->name = xbt_strdup(name);
   process->smx_host = host;
-  process->argc = argc;
-  process->argv = argv;
   process->mutex = NULL;
   process->cond = NULL;
-  process->context = xbt_context_new(name, code, NULL, NULL,
-                                     simix_global->cleanup_process_function,
-                                     process, process->argc, process->argv);
+  process->iwannadie = 0;
+
+  VERB1("Create context %s", process->name);
+  process->context = SIMIX_context_new(code, argc, argv, 
+                                       simix_global->cleanup_process_function,
+                                       process);
+
   process->data = data;
 
   /* Add properties */
@@ -88,21 +117,14 @@ smx_process_t SIMIX_process_create(const char *name,
   /* Add the process to it's host process list */
   xbt_swag_insert(process, host->process_list);
 
-  /* fix current_process, about which xbt_context_start mocks around */
-  self = simix_global->current_process;
-  xbt_context_start(process->context);
-  simix_global->current_process = self;
-
-  /* Now insert it in the global process list */
+  DEBUG1("Start context '%s'", process->name);
+  SIMIX_context_start(process->context);
+   
+  /* Now insert it in the global process list and in the process to run list */
   xbt_swag_insert(process, simix_global->process_list);
   DEBUG2("Inserting %s(%s) in the to_run list", process->name, host->name);
   xbt_swag_insert(process, simix_global->process_to_run);
 
-  /*sprintf(alias,"%s:%s",hostname,process->name);
-
-     mailbox = MSG_mailbox_new(alias);
-     MSG_mailbox_set_hostname(mailbox, hostname); */
-
   return process;
 }
 
@@ -139,23 +161,20 @@ void SIMIX_jprocess_create(const char *name, smx_host_t host,
   /* Process data */
   process->name = xbt_strdup(name);
   process->smx_host = host;
-  process->argc = 0;
-  process->argv = NULL;
   process->mutex = NULL;
   process->cond = NULL;
-  process->context = xbt_context_new(name, NULL, NULL, jprocess,
-                                     simix_global->cleanup_process_function,
-                                     process, 0, NULL);
+  SIMIX_context_new(jprocess, 0, NULL, NULL, NULL);
   process->data = data;
 
   /* Add the process to it's host process list */
-  xbt_swag_insert(process, host->process_list);
+  xbt_swag_insert(&process, host->process_list);
 
   /* fix current_process, about which xbt_context_start mocks around */
   self = simix_global->current_process;
-  xbt_context_start(process->context);
+  SIMIX_context_start(process->context);
   simix_global->current_process = self;
 
+  /* Now insert it in the global process list and in the process to run list */
   xbt_swag_insert(process, simix_global->process_list);
   DEBUG2("Inserting %s(%s) in the to_run list", process->name, host->name);
   xbt_swag_insert(process, simix_global->process_to_run);
@@ -169,8 +188,7 @@ void SIMIX_jprocess_create(const char *name, smx_host_t host,
  */
 void SIMIX_process_kill(smx_process_t process)
 {
-  DEBUG2("Killing process %s on %s", process->name,
-         process->smx_host->name);
+  DEBUG2("Killing process %s on %s", process->name, process->smx_host->name);
 
   /* Cleanup if we were waiting for something */
   if (process->mutex)
@@ -179,15 +197,16 @@ void SIMIX_process_kill(smx_process_t process)
   if (process->cond)
     xbt_swag_remove(process, process->cond->sleeping);
 
-  xbt_swag_remove(process, simix_global->process_to_run);
-  xbt_swag_remove(process, simix_global->process_list);
   DEBUG2("%p here! killing %p", simix_global->current_process, process);
-  xbt_context_kill(process->context);
 
-  if (process == SIMIX_process_self()) {
-    /* I just killed myself */
-    xbt_context_yield();
-  }
+  process->iwannadie = 1;
+
+  /* If I'm killing myself then stop otherwise schedule the process to kill */
+  if (process == SIMIX_process_self())
+    SIMIX_context_stop(process->context);
+  else
+    __SIMIX_process_schedule(process);
+  
 }
 
 /**
@@ -200,7 +219,6 @@ void SIMIX_process_kill(smx_process_t process)
 void *SIMIX_process_get_data(smx_process_t process)
 {
   xbt_assert0((process != NULL), "Invalid parameters");
-
   return (process->data);
 }
 
@@ -307,7 +325,7 @@ void SIMIX_process_suspend(smx_process_t process)
       process->suspended = 1;
       c = process->cond;
       xbt_fifo_foreach(c->actions, i, act, smx_action_t) {
-      surf_workstation_model->suspend(act->surf_action);
+	 surf_workstation_model->suspend(act->surf_action);
       }
     } else {
       process->suspended = 1;
@@ -321,7 +339,7 @@ void SIMIX_process_suspend(smx_process_t process)
 
     cond = SIMIX_cond_init();
     dummy = SIMIX_action_execute(SIMIX_process_get_host(process), name, 0);
-    surf_workstation_model->suspend(dummy->simdata->surf_action);
+    surf_workstation_model->suspend(dummy->surf_action);
     SIMIX_register_action_to_condition(dummy, cond);
     __SIMIX_cond_wait(cond);
     SIMIX_unregister_action_to_condition(dummy, cond);
@@ -358,7 +376,7 @@ void SIMIX_process_resume(smx_process_t process)
     process->suspended = 0;
     c = process->cond;
     xbt_fifo_foreach(c->actions, i, act, smx_action_t) {
-      surf_workstation_model->resume(act->simdata->surf_action);
+      surf_workstation_model->resume(act->surf_action);
     }
     SIMIX_cond_signal(c);
     return;
@@ -392,7 +410,7 @@ void SIMIX_process_change_host(smx_process_t process, char *source, char *dest)
  */
 int SIMIX_process_is_suspended(smx_process_t process)
 {
-  xbt_assert0(((process != NULL), "Invalid parameters");
+  xbt_assert0((process != NULL), "Invalid parameters");
 
   return (process->suspended);
 }
@@ -406,3 +424,40 @@ int SIMIX_process_count()
 {
   return xbt_swag_size(simix_global->process_list);
 }
+
+/** 
+ * Calling this function makes the process process to yield. The process
+ * that scheduled it returns from __SIMIX_process_schedule as if nothing
+ * had happened.
+ * 
+ * Only the processes can call this function, giving back the control
+ * to the maestro
+ */
+void __SIMIX_process_yield(void)
+{
+  DEBUG1("Yield process '%s'", simix_global->current_process->name);
+  xbt_assert0((simix_global->current_process != simix_global->maestro_process),
+              "You are not supposed to run this function here!");
+
+  SIMIX_context_suspend(simix_global->current_process->context);
+
+  if (simix_global->current_process->iwannadie)
+    SIMIX_context_stop(simix_global->current_process->context);
+}
+
+void __SIMIX_process_schedule(smx_process_t new_process)
+{
+  DEBUG1("Scheduling context: '%s'", new_process->name);
+
+  /* save the current process */
+  smx_process_t old_process = simix_global->current_process;
+
+  /* update the current process */
+  simix_global->current_process = new_process;
+
+  /* schedule the context */
+  SIMIX_context_resume(old_process->context, new_process->context);
+
+  /* restore the current process to the previously saved process */
+  simix_global->current_process = old_process;
+}