X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/7e71d73eb6728d8d498d010976f038789049c131..6a921002725af476cba5bffbbb228dbcec625fee:/src/simix/smx_process.c

diff --git a/src/simix/smx_process.c b/src/simix/smx_process.c
index 601f2c4268..f9180c3d1d 100644
--- a/src/simix/smx_process.c
+++ b/src/simix/smx_process.c
@@ -1,6 +1,5 @@
-//*     $Id$     */
-
-/* Copyright (c) 2002,2003,2004 Arnaud Legrand. All rights reserved.        */
+/* Copyright (c) 2007, 2008, 2009, 2010. The SimGrid Team.
+ * 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. */
@@ -163,13 +162,28 @@ void SIMIX_process_kill(smx_process_t process)
       SIMIX_unregister_action_to_condition(process->waiting_action, process->cond);
       SIMIX_action_destroy(process->waiting_action);
     }
+
+    if (process->sem) {
+      xbt_swag_remove(process, process->sem->sleeping);
+
+      if (process->waiting_action) {
+        SIMIX_unregister_action_to_semaphore(process->waiting_action, process->sem);
+        SIMIX_action_destroy(process->waiting_action);
+      }
+    }
+
     SIMIX_context_stop(process->context);
+
   } else {
-    DEBUG2("%p here! killing %p", simix_global->current_process, process);
-    SIMIX_process_schedule(process);
-    /* Cleanup if we were waiting for something */
-    if (process->mutex)
+    DEBUG4("%s(%p) here! killing %s(%p)",
+        simix_global->current_process->name,simix_global->current_process,
+        process->name,process);
+
+    /* Cleanup if it were waiting for something */
+    if (process->mutex) {
       xbt_swag_remove(process, process->mutex->sleeping);
+      process->mutex = NULL;
+    }
 
     if (process->cond) {
       xbt_swag_remove(process, process->cond->sleeping);
@@ -178,6 +192,7 @@ void SIMIX_process_kill(smx_process_t process)
         SIMIX_unregister_action_to_condition(process->waiting_action, process->cond);
         SIMIX_action_destroy(process->waiting_action);
       }
+      process->cond = NULL;
     }
 
     if (process->sem) {
@@ -187,7 +202,13 @@ void SIMIX_process_kill(smx_process_t process)
       	SIMIX_unregister_action_to_semaphore(process->waiting_action, process->sem);
       	SIMIX_action_destroy(process->waiting_action);
       }
+      process->sem = NULL;
     }
+
+    /* make sure that the process gets awake soon enough, now that we've set its iwannadie to 1 */
+    process->blocked = 0;
+    process->suspended = 0;
+    xbt_swag_insert(process, simix_global->process_to_run);
   }
 }
 
@@ -294,7 +315,7 @@ void SIMIX_process_suspend(smx_process_t process)
   if (process != SIMIX_process_self()) {
 
     if (process->mutex) {
-      /* process blocked on a mutex, only set suspend=1 */
+      /* process blocked on a mutex or sem, only set suspend=1 */
       process->suspended = 1;
     } else if (process->cond) {
       /* process blocked cond, suspend all actions */
@@ -307,7 +328,17 @@ 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);
+        SIMIX_action_suspend(act);
+      }
+    } else if (process->sem) {
+      smx_sem_t s;
+      xbt_fifo_item_t i;
+      smx_action_t act;
+
+      process->suspended = 1;
+      s = process->sem;
+      xbt_fifo_foreach(s->actions, i, act, smx_action_t) {
+        SIMIX_action_suspend(act);
       }
     } else {
       process->suspended = 1;
@@ -322,7 +353,7 @@ void SIMIX_process_suspend(smx_process_t process)
     cond = SIMIX_cond_init();
     dummy = SIMIX_action_execute(SIMIX_process_get_host(process), name, 0);
     SIMIX_process_self()->waiting_action = dummy;
-    surf_workstation_model->suspend(dummy->surf_action);
+    SIMIX_action_suspend(dummy);
     SIMIX_register_action_to_condition(dummy, cond);
     __SIMIX_cond_wait(cond);
     SIMIX_process_self()->waiting_action = NULL;
@@ -348,7 +379,7 @@ void SIMIX_process_resume(smx_process_t process)
     return;
 
   if (process->mutex) {
-    DEBUG0("Resume process blocked on a mutex");
+    DEBUG0("Resume process blocked on a mutex or semaphore");
     process->suspended = 0;     /* It'll wake up by itself when mutex releases */
     return;
   } else if (process->cond) {
@@ -360,10 +391,22 @@ 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->surf_action);
+      SIMIX_action_resume(act);
     }
     SIMIX_cond_signal(c);
     return;
+  } else if (process->sem) {
+    /* temporaries variables */
+    smx_sem_t s;
+    xbt_fifo_item_t i;
+    smx_action_t act;
+    DEBUG0("Resume process blocked on a semaphore");
+    process->suspended = 0;
+    s = process->sem;
+    xbt_fifo_foreach(s->actions, i, act, smx_action_t) {
+      SIMIX_action_resume(act);
+    }
+    return;
   } else {
     process->suspended = 0;
     xbt_swag_insert(process, simix_global->process_to_run);
@@ -378,9 +421,11 @@ void SIMIX_process_resume(smx_process_t process)
 void SIMIX_process_change_host(smx_process_t process, char *source,
                                char *dest)
 {
+  smx_host_t h1 = NULL;
+  smx_host_t h2 = NULL;
   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);
+  h1 = SIMIX_host_get_by_name(source);
+  h2 = SIMIX_host_get_by_name(dest);
   process->smx_host = h2;
   xbt_swag_remove(process, h1->process_list);
   xbt_swag_insert(process, h2->process_list);
@@ -425,7 +470,10 @@ void SIMIX_process_yield(void)
                simix_global->maestro_process),
               "You are not supposed to run this function in maestro context!");
 
+
+  /* Go into sleep and return control to maestro */
   SIMIX_context_suspend(simix_global->current_process->context);
+  /* Ok, maestro returned control to us */
 
   if (simix_global->current_process->iwannadie)
     SIMIX_context_stop(simix_global->current_process->context);
@@ -433,20 +481,19 @@ void SIMIX_process_yield(void)
 
 void SIMIX_process_schedule(smx_process_t new_process)
 {
+  xbt_assert0(simix_global->current_process == simix_global->maestro_process,
+      "This function can only be called from maestro context");
   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);
+  SIMIX_context_resume(new_process->context);
   DEBUG1("Resumed from scheduling context: '%s'", new_process->name);
 
   /* restore the current process to the previously saved process */
-  simix_global->current_process = old_process;
+  simix_global->current_process = simix_global->maestro_process;
 }
 
 /* callback: context fetching */