X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/42ad1e118f005d56af6f9e87d7ecec75bb311108..1cde906ff21eb6a3dd34cce742b544e1ddcb8994:/src/simix/smx_process.c

diff --git a/src/simix/smx_process.c b/src/simix/smx_process.c
index b2384bbdcb..e0c849ca70 100644
--- a/src/simix/smx_process.c
+++ b/src/simix/smx_process.c
@@ -16,13 +16,8 @@ XBT_LOG_NEW_DEFAULT_SUBCATEGORY(simix_process, simix,
 
 /******************************** 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_to_run);
@@ -31,37 +26,52 @@ void SIMIX_process_cleanup(void *arg)
   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 *)"maestro";
+  process->name = (char *)"";
 
-  /*Create the right context type (FIXME: check the return value for success)*/
-  SIMIX_context_create_maestro(&process);
+  /* 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
@@ -75,7 +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);
@@ -91,17 +100,16 @@ smx_process_t SIMIX_process_create(const char *name,
   /* Process data */
   process->name = xbt_strdup(name);
   process->smx_host = host;
-  process->argc = argc;
-  process->argv = argv;
   process->mutex = NULL;
   process->cond = NULL;
+  process->iwannadie = 0;
 
-  /*Create the right context type (FIXME: check the return value for success)*/
-  SIMIX_context_new(&process, code);
+  VERB1("Create context %s", process->name);
+  process->context = SIMIX_context_new(code, argc, argv, 
+                                       simix_global->cleanup_process_function,
+                                       process);
 
   process->data = data;
-  process->cleanup_func = simix_global->cleanup_process_function;
-  process->cleanup_arg = process;
 
   /* Add properties */
   process->properties = properties;
@@ -109,11 +117,9 @@ 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 SIMIX_context_start mocks around */
-  self = simix_global->current_process;
-  SIMIX_context_start(process);
-  simix_global->current_process = self;
-
+  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);
@@ -155,11 +161,9 @@ 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;
-  SIMIX_context_new(&process, jprocess);
+  SIMIX_context_new(jprocess, 0, NULL, NULL, NULL);
   process->data = data;
 
   /* Add the process to it's host process list */
@@ -167,7 +171,7 @@ void SIMIX_jprocess_create(const char *name, smx_host_t host,
 
   /* fix current_process, about which xbt_context_start mocks around */
   self = simix_global->current_process;
-  SIMIX_context_start(process);
+  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 */
@@ -184,8 +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)
@@ -195,12 +198,15 @@ void SIMIX_process_kill(smx_process_t process)
     xbt_swag_remove(process, process->cond->sleeping);
 
   DEBUG2("%p here! killing %p", simix_global->current_process, process);
-  SIMIX_context_kill(process);
 
-  if (process == SIMIX_process_self()) {
-    /* I just killed myself */
-    SIMIX_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);
+  
 }
 
 /**
@@ -404,7 +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);
 }
@@ -418,3 +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;
+}