X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/dfba58804092abb7c4f2fc4fe922bcab23413be2..1cde906ff21eb6a3dd34cce742b544e1ddcb8994:/src/simix/smx_process.c

diff --git a/src/simix/smx_process.c b/src/simix/smx_process.c
index fa1fc6640e..e0c849ca70 100644
--- a/src/simix/smx_process.c
+++ b/src/simix/smx_process.c
@@ -12,118 +12,141 @@
 #include "msg/mailbox.h"
 
 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(simix_process, simix,
-				"Logging specific to SIMIX (process)");
+                                "Logging specific to SIMIX (process)");
 
 /******************************** Process ************************************/
 /**
- * \brief Creates and runs a new #smx_process_t.
- *
- * 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
+ * \brief Move a process to the list of process to destroy. *
  */
-
-
 void SIMIX_process_cleanup(void *arg)
 {
-  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)->simdata->smx_host->simdata->
-		  process_list);
-  free(((smx_process_t) arg)->name);
-  ((smx_process_t) arg)->name = NULL;
-
-  free(((smx_process_t) arg)->simdata);
-  ((smx_process_t) arg)->simdata = NULL;
-  free(arg);
+  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
+ *
+ * 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);
+  }
+}
+
+/**
+ * \brief Creates and runs the maestro process
+ */
+void __SIMIX_create_maestro_process()
+{
+  smx_process_t process = NULL;
+  process = xbt_new0(s_smx_process_t, 1);
+
+  /* Process data */
+  process->name = (char *)"";
+
+  /* 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;
+}
+
+/**
  * \brief Creates and runs a new #smx_process_t.
  *
  * 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
- * \param clean_process_function The cleanup function of user process. It will be called when the process finish. This function have to call the SIMIX_process_cleanup.	
+ * \param clean_process_function The cleanup function of user process. It will be called when the process finish. This function have to call the SIMIX_process_cleanup.
  * \see smx_process_t
  * \return The new corresponding object.
  */
 smx_process_t SIMIX_process_create(const char *name,
-				   xbt_main_func_t code, void *data,
-				   const char *hostname, int argc,
-				   char **argv, xbt_dict_t properties)
+                                   xbt_main_func_t code, void *data,
+                                   const char *hostname, int argc,
+                                   char **argv, xbt_dict_t properties)
 {
-  smx_simdata_process_t simdata = xbt_new0(s_smx_simdata_process_t, 1);
-  smx_process_t process = xbt_new0(s_smx_process_t, 1);
-  smx_process_t self = NULL;
+  smx_process_t process = NULL;
   smx_host_t host = SIMIX_host_get_by_name(hostname);
-  /*char alias[MAX_ALIAS_NAME + 1] = {0};
-  msg_mailbox_t mailbox;*/
-	
+
+  DEBUG2("Start process %s on host %s", name, hostname);
+
+  if (!SIMIX_host_get_state(host)) {
+    WARN2("Cannot launch process '%s' on failed host '%s'", name, hostname);
+    return NULL;
+  }
+  process = xbt_new0(s_smx_process_t, 1);
+
   xbt_assert0(((code != NULL) && (host != NULL)), "Invalid parameters");
-  /* Simulator Data */
-
-  simdata->smx_host = host;
-  simdata->mutex = NULL;
-  simdata->cond = NULL;
-  simdata->argc = argc;
-  simdata->argv = argv;
-  simdata->context = xbt_context_new(name,code, NULL, NULL,
-				     simix_global->
-				     cleanup_process_function, process,
-				     simdata->argc, simdata->argv);
-
-  /* Process structure */
+
+  /* Process data */
   process->name = xbt_strdup(name);
-  process->simdata = simdata;
-  process->data = data;
+  process->smx_host = host;
+  process->mutex = NULL;
+  process->cond = NULL;
+  process->iwannadie = 0;
 
-  /* Add properties*/
-  simdata->properties = properties;
+  VERB1("Create context %s", process->name);
+  process->context = SIMIX_context_new(code, argc, argv, 
+                                       simix_global->cleanup_process_function,
+                                       process);
 
-  xbt_swag_insert(process, host->simdata->process_list);
+  process->data = data;
 
-  /* fix current_process, about which xbt_context_start mocks around */
-  self = simix_global->current_process;
-  xbt_context_start(process->simdata->context);
-  simix_global->current_process = self;
+  /* Add properties */
+  process->properties = properties;
 
+  /* Add the process to it's host process list */
+  xbt_swag_insert(process, host->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;
 }
-/** 
+
+/**
  * \brief Creates and runs a new #smx_process_t hosting a JAVA thread
  *
  * Warning: this should only be used in libsimgrid4java, since it create
- * a context with no code, which leads to segfaults in plain libsimgrid 
+ * a context with no code, which leads to segfaults in plain libsimgrid
  */
 void SIMIX_jprocess_create(const char *name, smx_host_t host,
-			   void *data,
-			   void *jprocess, void *jenv, smx_process_t * res)
+                           void *data,
+                           void *jprocess, void *jenv, smx_process_t * res)
 {
-  smx_simdata_process_t simdata = xbt_new0(s_smx_simdata_process_t, 1);
   smx_process_t process = xbt_new0(s_smx_process_t, 1);
   smx_process_t self = NULL;
 
   /* HACK: We need this trick because when we xbt_context_new() do
-     syncronization stuff, the s_process field in the m_process needs 
-     to have a valid value, and we call xbt_context_new() before 
-     returning, of course, ie, before providing a right value to the 
-     caller (Java_simgrid_msg_Msg_processCreate) have time to store it  
-     in place. This way, we initialize the m_process->simdata->s_process 
+     syncronization stuff, the s_process field in the m_process needs
+     to have a valid value, and we call xbt_context_new() before
+     returning, of course, ie, before providing a right value to the
+     caller (Java_simgrid_msg_Msg_processCreate) have time to store it
+     in place. This way, we initialize the m_process->simdata->s_process
      field ourself ASAP.
 
      All this would be much simpler if the synchronization stuff would be done
@@ -131,45 +154,32 @@ void SIMIX_jprocess_create(const char *name, smx_host_t host,
    */
   *res = process;
 
-
-
   DEBUG5("jprocess_create(name=%s,host=%p,data=%p,jproc=%p,jenv=%p)",
-	 name, host, data, jprocess, jenv);
+         name, host, data, jprocess, jenv);
   xbt_assert0(host, "Invalid parameters");
-  /* Simulator Data */
-  simdata->smx_host = host;
-  simdata->mutex = NULL;
-  simdata->cond = NULL;
-  simdata->argc = 0;
-  simdata->argv = NULL;
-
- 
-  simdata->context = xbt_context_new(name,NULL, NULL, jprocess,
-				     simix_global->
-				     cleanup_process_function, process,
-				     /* argc/argv */ 0, NULL);
-	
-  /* Process structure */
+
+  /* Process data */
   process->name = xbt_strdup(name);
-  process->simdata = simdata;
+  process->smx_host = host;
+  process->mutex = NULL;
+  process->cond = NULL;
+  SIMIX_context_new(jprocess, 0, NULL, NULL, NULL);
   process->data = data;
 
-  xbt_swag_insert(process, host->simdata->process_list);
+  /* 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->simdata->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);
-
 }
 
-
 /** \brief Kill a SIMIX process
  *
  * This function simply kills a \a process... scarry isn't it ? :).
@@ -178,27 +188,25 @@ void SIMIX_jprocess_create(const char *name, smx_host_t host,
  */
 void SIMIX_process_kill(smx_process_t process)
 {
-  smx_simdata_process_t p_simdata = process->simdata;
-
-  DEBUG2("Killing process %s on %s", process->name,
-	 p_simdata->smx_host->name);
+  DEBUG2("Killing process %s on %s", process->name, process->smx_host->name);
 
   /* Cleanup if we were waiting for something */
-  if (p_simdata->mutex)
-    xbt_swag_remove(process, p_simdata->mutex->sleeping);
+  if (process->mutex)
+    xbt_swag_remove(process, process->mutex->sleeping);
 
-  if (p_simdata->cond)
-    xbt_swag_remove(process, p_simdata->cond->sleeping);
+  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->simdata->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);
+  
 }
 
 /**
@@ -211,7 +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);
 }
 
@@ -225,10 +232,8 @@ void *SIMIX_process_get_data(smx_process_t process)
 void SIMIX_process_set_data(smx_process_t process, void *data)
 {
   xbt_assert0((process != NULL), "Invalid parameters");
-  //xbt_assert0((process->data == NULL), "Data already set");
 
   process->data = data;
-
   return;
 }
 
@@ -241,10 +246,8 @@ void SIMIX_process_set_data(smx_process_t process, void *data)
  */
 smx_host_t SIMIX_process_get_host(smx_process_t process)
 {
-  xbt_assert0(((process != NULL)
-	       && (process->simdata)), "Invalid parameters");
-
-  return (process->simdata->smx_host);
+  xbt_assert0((process != NULL), "Invalid parameters");
+  return (process->smx_host);
 }
 
 /**
@@ -256,12 +259,23 @@ smx_host_t SIMIX_process_get_host(smx_process_t process)
  */
 const char *SIMIX_process_get_name(smx_process_t process)
 {
-  xbt_assert0(((process != NULL)
-	       && (process->simdata)), "Invalid parameters");
-
+  xbt_assert0((process != NULL), "Invalid parameters");
   return (process->name);
 }
 
+/**
+ * \brief Changes the name of an agent.
+ *
+ * This functions checks whether \a process is a valid pointer or not and return its name.
+ * \param process SIMIX process
+ * \param name The new process name
+ */
+void SIMIX_process_set_name(smx_process_t process, char *name)
+{
+  xbt_assert0((process != NULL), "Invalid parameters");
+  process->name = name;
+}
+
 /** \ingroup m_process_management
  * \brief Return the properties
  *
@@ -269,7 +283,7 @@ const char *SIMIX_process_get_name(smx_process_t process)
  */
 xbt_dict_t SIMIX_process_get_properties(smx_process_t process)
 {
-  return process->simdata->properties;
+  return process->properties;
 }
 
 /**
@@ -293,17 +307,14 @@ smx_process_t SIMIX_process_self(void)
  */
 void SIMIX_process_suspend(smx_process_t process)
 {
-  smx_simdata_process_t simdata = NULL;
-
-  xbt_assert0(((process) && (process->simdata)), "Invalid parameters");
+  xbt_assert0(process, "Invalid parameters");
 
   if (process != SIMIX_process_self()) {
-    simdata = process->simdata;
 
-    if (simdata->mutex) {
+    if (process->mutex) {
       /* process blocked on a mutex, only set suspend=1 */
-      simdata->suspended = 1;
-    } else if (simdata->cond) {
+      process->suspended = 1;
+    } else if (process->cond) {
       /* process blocked cond, suspend all actions */
 
       /* temporaries variables */
@@ -311,25 +322,24 @@ void SIMIX_process_suspend(smx_process_t process)
       xbt_fifo_item_t i;
       smx_action_t act;
 
-      simdata->suspended = 1;
-      c = simdata->cond;
+      process->suspended = 1;
+      c = process->cond;
       xbt_fifo_foreach(c->actions, i, act, smx_action_t) {
-	surf_workstation_model->common_public->suspend(act->simdata->
-							  surf_action);
+	 surf_workstation_model->suspend(act->surf_action);
       }
     } else {
-      simdata->suspended = 1;
+      process->suspended = 1;
     }
   } else {
     /* process executing, I can create an action and suspend it */
     smx_action_t dummy;
     smx_cond_t cond;
     char name[] = "dummy";
-    process->simdata->suspended = 1;
+    process->suspended = 1;
 
     cond = SIMIX_cond_init();
     dummy = SIMIX_action_execute(SIMIX_process_get_host(process), name, 0);
-    surf_workstation_model->common_public->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);
@@ -347,39 +357,33 @@ void SIMIX_process_suspend(smx_process_t process)
  */
 void SIMIX_process_resume(smx_process_t process)
 {
-  smx_simdata_process_t simdata = NULL;
-
-  xbt_assert0(((process != NULL)
-	       && (process->simdata)), "Invalid parameters");
+  xbt_assert0((process != NULL), "Invalid parameters");
   SIMIX_CHECK_HOST();
 
-  if (process == SIMIX_process_self()) {
+  if (process == SIMIX_process_self())
     return;
-  }
 
-  simdata = process->simdata;
-  if (simdata->mutex) {
+  if (process->mutex) {
     DEBUG0("Resume process blocked on a mutex");
-    simdata->suspended = 0;	/* He'll wake up by itself */
+    process->suspended = 0;     /* It'll wake up by itself when mutex releases */
     return;
-  } else if (simdata->cond) {
+  } else if (process->cond) {
     /* temporaries variables */
     smx_cond_t c;
     xbt_fifo_item_t i;
     smx_action_t act;
-	DEBUG0("Resume process blocked on a conditional");
-    simdata->suspended = 0;
-    c = simdata->cond;
+    DEBUG0("Resume process blocked on a conditional");
+    process->suspended = 0;
+    c = process->cond;
     xbt_fifo_foreach(c->actions, i, act, smx_action_t) {
-      surf_workstation_model->common_public->resume(act->simdata->surf_action);
+      surf_workstation_model->resume(act->surf_action);
     }
     SIMIX_cond_signal(c);
     return;
   } else {
-    simdata->suspended = 0;
+    process->suspended = 0;
     xbt_swag_insert(process, simix_global->process_to_run);
   }
-
 }
 
 /**
@@ -389,12 +393,12 @@ void SIMIX_process_resume(smx_process_t process)
  */
 void SIMIX_process_change_host(smx_process_t process, char *source, char *dest)
 {
-  smx_simdata_process_t p_simdata = process->simdata;
+  xbt_assert0((process != NULL), "Invalid parameters");
   smx_host_t h1 = SIMIX_host_get_by_name(source);
   smx_host_t h2 = SIMIX_host_get_by_name(dest);
-  p_simdata->smx_host =  h2;
-  xbt_swag_remove(process, h1->simdata->process_list);
-  xbt_swag_insert(process, h2->simdata->process_list);
+  process->smx_host = h2;
+  xbt_swag_remove(process, h1->process_list);
+  xbt_swag_insert(process, h2->process_list);
 }
 
 /**
@@ -406,10 +410,54 @@ 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)
-	       && (process->simdata)), "Invalid parameters");
+  xbt_assert0((process != NULL), "Invalid parameters");
+
+  return (process->suspended);
+}
+
+/**
+ * \brief Returns the amount of SIMIX processes in the system
+ *
+ * Maestro internal process is not counted, only user code processes are
+ */
+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);
 
-  return (process->simdata->suspended);
+  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;
+}