X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/d2bb33858171f062e6bd6abd3d6982d37cd51de9..1ae612ef301a26795068505cf761169ed29a5451:/src/simix/smx_process.c

diff --git a/src/simix/smx_process.c b/src/simix/smx_process.c
index e182d8dfb5..bd3413769b 100644
--- a/src/simix/smx_process.c
+++ b/src/simix/smx_process.c
@@ -8,15 +8,12 @@
 #include "xbt/sysdep.h"
 #include "xbt/log.h"
 #include "xbt/dict.h"
-#include "msg/mailbox.h"
 #include "mc/mc.h"
 
 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(simix_process, simix,
                                 "Logging specific to SIMIX (process)");
 
 unsigned long simix_process_maxpid = 0;
-/* FIXME: Ugly hack!*/
-extern double NOW;
 
 /**
  * \brief Returns the current agent.
@@ -33,11 +30,68 @@ XBT_INLINE smx_process_t SIMIX_process_self(void)
 }
 
 /**
- * \brief Move a process to the list of processes to destroy.
+ * \brief Returns whether a process has pending asynchronous communications.
+ * \return true if there are asynchronous communications in this process
+ */
+int SIMIX_process_has_pending_comms(smx_process_t process) {
+
+  return xbt_fifo_size(process->comms) > 0;
+}
+
+/**
+ * \brief Moves a process to the list of processes to destroy.
  */
 void SIMIX_process_cleanup(smx_process_t process)
 {
-  DEBUG1("Cleanup process %s", process->name);
+  XBT_DEBUG("Cleanup process %s (%p), waiting action %p",
+      process->name, process, process->waiting_action);
+
+  /* cancel non-blocking communications */
+  smx_action_t action;
+  while ((action = xbt_fifo_pop(process->comms))) {
+
+    /* make sure no one will finish the comm after this process is destroyed,
+     * because src_proc or dst_proc would be an invalid pointer */
+    SIMIX_comm_cancel(action);
+
+    if (action->comm.src_proc == process) {
+      XBT_DEBUG("Found an unfinished send comm %p (detached = %d), state %d, src = %p, dst = %p",
+          action, action->comm.detached, action->state, action->comm.src_proc, action->comm.dst_proc);
+      action->comm.src_proc = NULL;
+
+      if (action->comm.detached) {
+         if (action->comm.refcount == 0) {
+           XBT_DEBUG("Increase the refcount before destroying it since it's detached");
+           /* I'm not supposed to destroy a detached comm from the sender side,
+            * unless there is no receiver matching the rdv */
+           action->comm.refcount++;
+           SIMIX_comm_destroy(action);
+         }
+         else {
+           XBT_DEBUG("Don't destroy it since its refcount is %d", action->comm.refcount);
+         }
+      } else {
+        SIMIX_comm_destroy(action);
+      }
+    }
+    else if (action->comm.dst_proc == process){
+      XBT_DEBUG("Found an unfinished recv comm %p, state %d, src = %p, dst = %p",
+          action, action->state, action->comm.src_proc, action->comm.dst_proc);
+      action->comm.dst_proc = NULL;
+
+      if (action->comm.detached && action->comm.refcount == 1
+          && action->comm.src_proc != NULL) {
+        /* the comm will be freed right now, remove it from the sender */
+        xbt_fifo_remove(action->comm.src_proc->comms, action);
+      }
+      SIMIX_comm_destroy(action);
+    }
+    else {
+      xbt_die("Communication action %p is in my list but I'm not the sender "
+          "or the receiver", action);
+    }
+  }
+
   /*xbt_swag_remove(process, simix_global->process_to_run);*/
   xbt_swag_remove(process, simix_global->process_list);
   xbt_swag_remove(process, process->smx_host->process_list);
@@ -58,13 +112,12 @@ void SIMIX_process_empty_trash(void)
     SIMIX_context_free(process->context);
 
     /* Free the exception allocated at creation time */
-    if (process->running_ctx)
-      free(process->running_ctx);
-    if (process->properties)
-      xbt_dict_free(&process->properties);
+    free(process->running_ctx);
+    xbt_dict_free(&process->properties);
+
+    xbt_fifo_free(process->comms);
 
     free(process->name);
-    process->name = NULL;
     free(process);
   }
 }
@@ -96,27 +149,15 @@ void SIMIX_create_maestro_process()
 smx_process_t SIMIX_process_create_from_wrapper(smx_process_arg_t args) {
 
   smx_process_t process;
-
-  if (simix_global->create_process_function) {
-    process = simix_global->create_process_function(args->name,
-	args->code,
-	args->data,
-	args->hostname,
-	args->argc,
-	args->argv,
-	args->properties);
-  }
-  else {
-    process = SIMIX_process_create(args->name,
-	args->code,
-	args->data,
-	args->hostname,
-	args->argc,
-	args->argv,
-	args->properties);
-  }
-  // FIXME: to simplify this, simix_global->create_process_function could just
-  // be SIMIX_process_create() by default (and the same thing in smx_deployment.c)
+  simix_global->create_process_function(
+      &process,
+      args->name,
+      args->code,
+      args->data,
+      args->hostname,
+      args->argc,
+      args->argv,
+      args->properties);
 
   return process;
 }
@@ -130,55 +171,75 @@ smx_process_t SIMIX_process_create_from_wrapper(smx_process_arg_t args) {
  *
  * \return the process created
  */
-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) {
-
-  smx_process_t process = NULL;
+void SIMIX_process_create(smx_process_t *process,
+                          const char *name,
+                          xbt_main_func_t code,
+                          void *data,
+                          const char *hostname,
+                          int argc, char **argv,
+                          xbt_dict_t properties) {
+
+  *process = NULL;
   smx_host_t host = SIMIX_host_get_by_name(hostname);
 
-  DEBUG2("Start process %s on host %s", name, hostname);
+  XBT_DEBUG("Start process %s on host %s", name, hostname);
 
   if (!SIMIX_host_get_state(host)) {
-    WARN2("Cannot launch process '%s' on failed host '%s'", name,
+    XBT_WARN("Cannot launch process '%s' on failed host '%s'", name,
           hostname);
   }
   else {
-    process = xbt_new0(s_smx_process_t, 1);
+    *process = xbt_new0(s_smx_process_t, 1);
 
-    xbt_assert0(((code != NULL) && (host != NULL)), "Invalid parameters");
+    xbt_assert(((code != NULL) && (host != NULL)), "Invalid parameters");
 
     /* Process data */
-    process->pid = simix_process_maxpid++;
-    process->name = xbt_strdup(name);
-    process->smx_host = host;
-    process->data = data;
+    (*process)->pid = simix_process_maxpid++;
+    (*process)->name = xbt_strdup(name);
+    (*process)->smx_host = host;
+    (*process)->data = data;
+    (*process)->comms = xbt_fifo_new();
+    (*process)->request.issuer = *process;
 
-    VERB1("Create context %s", process->name);
-    process->context = SIMIX_context_new(code, argc, argv,
-    	simix_global->cleanup_process_function, process);
+    XBT_VERB("Create context %s", (*process)->name);
+    (*process)->context = SIMIX_context_new(code, argc, argv,
+    	simix_global->cleanup_process_function, *process);
 
-    process->running_ctx = xbt_new(xbt_running_ctx_t, 1);
-    XBT_RUNNING_CTX_INITIALIZE(process->running_ctx);
+    (*process)->running_ctx = xbt_new(xbt_running_ctx_t, 1);
+    XBT_RUNNING_CTX_INITIALIZE((*process)->running_ctx);
 
     /* Add properties */
-    process->properties = properties;
+    (*process)->properties = properties;
 
     /* Add the process to it's host process list */
-    xbt_swag_insert(process, host->process_list);
+    xbt_swag_insert(*process, host->process_list);
 
-    DEBUG1("Start context '%s'", process->name);
+    XBT_DEBUG("Start context '%s'", (*process)->name);
 
     /* 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_dynar_push_as(simix_global->process_to_run, smx_process_t, process);
+    xbt_swag_insert(*process, simix_global->process_list);
+    XBT_DEBUG("Inserting %s(%s) in the to_run list", (*process)->name, host->name);
+    xbt_dynar_push_as(simix_global->process_to_run, smx_process_t, *process);
   }
+}
 
-  return process;
+/**
+ * \brief Executes the processes from simix_global->process_to_run.
+ *
+ * The processes of simix_global->process_to_run are run (in parallel if
+ * possible).  On exit, simix_global->process_to_run is empty, and
+ * simix_global->process_that_ran contains the list of processes that just ran.
+ * The two lists are swapped so, be careful when using them before and after a
+ * call to this function.
+ */
+void SIMIX_process_runall(void)
+{
+  SIMIX_context_runall();
+
+  xbt_dynar_t tmp = simix_global->process_that_ran;
+  simix_global->process_that_ran = simix_global->process_to_run;
+  simix_global->process_to_run = tmp;
+  xbt_dynar_reset(simix_global->process_to_run);
 }
 
 /**
@@ -189,15 +250,16 @@ smx_process_t SIMIX_process_create(const char *name,
  *
  * \param process poor victim
  */
-void SIMIX_process_kill(smx_process_t process, smx_process_t killer) {
+void SIMIX_process_kill(smx_process_t process) {
 
-  DEBUG2("Killing process %s on %s", process->name, process->smx_host->name);
+  XBT_DEBUG("Killing process %s on %s", process->name, process->smx_host->name);
 
   process->context->iwannadie = 1;
   process->blocked = 0;
   process->suspended = 0;
   /* FIXME: set doexception to 0 also? */
 
+  /* destroy the blocking action if any */
   if (process->waiting_action) {
 
     switch (process->waiting_action->type) {
@@ -226,26 +288,22 @@ void SIMIX_process_kill(smx_process_t process, smx_process_t killer) {
     }
   }
 
-  /* If I'm killing myself then stop, otherwise schedule the process to kill. */
-  if (process == killer) {
-    SIMIX_context_stop(process->context);
-  }
-  else {
-    xbt_dynar_push_as(simix_global->process_to_run, smx_process_t, process);
-  }
+  xbt_dynar_push_as(simix_global->process_to_run, smx_process_t, process);
 }
 
 /**
  * \brief Kills all running processes.
- *
- * Only maestro can kill everyone.
+ * \param issuer this one will not be killed
  */
-void SIMIX_process_killall(void)
+void SIMIX_process_killall(smx_process_t issuer)
 {
   smx_process_t p = NULL;
 
-  while ((p = xbt_swag_extract(simix_global->process_list)))
-    SIMIX_process_kill(p, SIMIX_process_self());
+  while ((p = xbt_swag_extract(simix_global->process_list))) {
+    if (p != issuer) {
+      SIMIX_process_kill(p);
+    }
+  }
 
   SIMIX_context_runall(simix_global->process_to_run);
 
@@ -253,16 +311,17 @@ void SIMIX_process_killall(void)
 }
 
 void SIMIX_process_change_host(smx_process_t process,
-    const char *source, const char *dest)
+			       smx_host_t dest)
 {
-  smx_host_t h1 = NULL;
-  smx_host_t h2 = NULL;
-  xbt_assert0((process != NULL), "Invalid parameters");
-  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);
+  xbt_assert((process != NULL), "Invalid parameters");
+  xbt_swag_remove(process, process->smx_host->process_list);
+  process->smx_host = dest;
+  xbt_swag_insert(process, dest->process_list);
+}
+
+void SIMIX_pre_process_change_host(smx_process_t process, smx_host_t dest)
+{
+  process->new_host = dest;
 }
 
 void SIMIX_pre_process_suspend(smx_req_t req)
@@ -278,12 +337,17 @@ void SIMIX_pre_process_suspend(smx_req_t req)
 
 void SIMIX_process_suspend(smx_process_t process, smx_process_t issuer)
 {
-  xbt_assert0(process, "Invalid parameters");
+  xbt_assert((process != NULL), "Invalid parameters");
+
+  if (process->suspended) {
+    XBT_DEBUG("Process '%s' is already suspended", process->name);
+    return;
+  }
 
   process->suspended = 1;
 
   /* If we are suspending another process, and it is waiting on an action,
-     suspend it's action. */
+     suspend its action. */
   if (process != issuer) {
 
     if (process->waiting_action) {
@@ -304,7 +368,8 @@ void SIMIX_process_suspend(smx_process_t process, smx_process_t issuer)
           break;
 
         default:
-          THROW_IMPOSSIBLE;
+          xbt_die("Internal error in SIMIX_process_suspend: unexpected action type %d",
+              process->waiting_action->type);
       }
     }
   }
@@ -312,7 +377,12 @@ void SIMIX_process_suspend(smx_process_t process, smx_process_t issuer)
 
 void SIMIX_process_resume(smx_process_t process, smx_process_t issuer)
 {
-  xbt_assert0((process != NULL), "Invalid parameters");
+  xbt_assert((process != NULL), "Invalid parameters");
+
+  if (!process->suspended) {
+    XBT_DEBUG("Process '%s' is not suspended", process->name);
+    return;
+  }
 
   process->suspended = 0;
 
@@ -338,7 +408,8 @@ void SIMIX_process_resume(smx_process_t process, smx_process_t issuer)
           break;
 
         default:
-          THROW_IMPOSSIBLE;
+          xbt_die("Internal error in SIMIX_process_resume: unexpected action type %d",
+              process->waiting_action->type);
       }
     }
     else {
@@ -350,23 +421,27 @@ void SIMIX_process_resume(smx_process_t process, smx_process_t issuer)
 int SIMIX_process_get_maxpid(void) {
   return simix_process_maxpid;
 }
+
 int SIMIX_process_count(void)
 {
   return xbt_swag_size(simix_global->process_list);
 }
 
-void* SIMIX_process_self_get_data(void)
+void* SIMIX_process_self_get_data(smx_process_t self)
 {
-  smx_process_t me = SIMIX_process_self();
-  if (!me) {
+  xbt_assert(self == SIMIX_process_self(), "This is not the current process");
+
+  if (!self) {
     return NULL;
   }
-  return SIMIX_process_get_data(me);
+  return SIMIX_process_get_data(self);
 }
 
-void SIMIX_process_self_set_data(void *data)
+void SIMIX_process_self_set_data(smx_process_t self, void *data)
 {
-  SIMIX_process_set_data(SIMIX_process_self(), data);
+  xbt_assert(self == SIMIX_process_self(), "This is not the current process");
+
+  SIMIX_process_set_data(self, data);
 }
 
 void* SIMIX_process_get_data(smx_process_t process)
@@ -400,17 +475,21 @@ const char* SIMIX_process_get_name(smx_process_t process)
   return process->name;
 }
 
-int SIMIX_process_is_suspended(smx_process_t process)
+smx_process_t SIMIX_process_get_by_name(const char* name)
 {
-  return process->suspended;
+  smx_process_t proc;
+
+  xbt_swag_foreach(proc, simix_global->process_list)
+  {
+    if(!strcmp(name, proc->name))
+      return proc;
+  }
+  return NULL;
 }
 
-int SIMIX_process_is_enabled(smx_process_t process)
+int SIMIX_process_is_suspended(smx_process_t process)
 {
-  if (process->request.call != REQ_NO_REQ && SIMIX_request_is_enabled(&process->request))
-    return TRUE;
-
-  return FALSE;
+  return process->suspended;
 }
 
 xbt_dict_t SIMIX_process_get_properties(smx_process_t process)
@@ -421,9 +500,10 @@ xbt_dict_t SIMIX_process_get_properties(smx_process_t process)
 void SIMIX_pre_process_sleep(smx_req_t req)
 {
   if (MC_IS_ENABLED) {
-    NOW += req->process_sleep.duration;
+    MC_process_clock_add(req->issuer, req->process_sleep.duration);
     req->process_sleep.result = SIMIX_DONE;
     SIMIX_request_answer(req);
+    return;
   }
   smx_action_t action = SIMIX_process_sleep(req->issuer, req->process_sleep.duration);
   xbt_fifo_push(action->request_list, req);
@@ -438,14 +518,13 @@ smx_action_t SIMIX_process_sleep(smx_process_t process, double duration)
   /* check if the host is active */
   if (surf_workstation_model->extension.
       workstation.get_state(host->host) != SURF_RESOURCE_ON) {
-    THROW1(host_error, 0, "Host %s failed, you cannot call this function",
+    THROWF(host_error, 0, "Host %s failed, you cannot call this function",
            host->name);
   }
 
-  action = xbt_new0(s_smx_action_t, 1);
+  action = xbt_mallocator_get(simix_global->action_mallocator);
   action->type = SIMIX_ACTION_SLEEP;
-  action->request_list = xbt_fifo_new();
-  action->name = xbt_strdup("sleep");
+  action->name = NULL;
 #ifdef HAVE_TRACING
   action->category = NULL;
 #endif
@@ -455,37 +534,44 @@ smx_action_t SIMIX_process_sleep(smx_process_t process, double duration)
       surf_workstation_model->extension.workstation.sleep(host->host, duration);
 
   surf_workstation_model->action_data_set(action->sleep.surf_sleep, action);
-  DEBUG1("Create sleep action %p", action);
+  XBT_DEBUG("Create sleep action %p", action);
 
   return action;
 }
 
 void SIMIX_post_process_sleep(smx_action_t action)
 {
-  e_smx_state_t state = SIMIX_action_map_state(surf_workstation_model->action_state_get(action->sleep.surf_sleep));
   smx_req_t req;
+  e_smx_state_t state;
 
   while ((req = xbt_fifo_shift(action->request_list))) {
+
+    switch(surf_workstation_model->action_state_get(action->sleep.surf_sleep)){
+      case SURF_ACTION_FAILED:
+        state = SIMIX_SRC_HOST_FAILURE;
+        break;
+
+      case SURF_ACTION_DONE:
+        state = SIMIX_DONE;
+        break;
+
+      default:
+        THROW_IMPOSSIBLE;
+        break;
+    }
     req->process_sleep.result = state;
     req->issuer->waiting_action = NULL;
     SIMIX_request_answer(req);
   }
-
   SIMIX_process_sleep_destroy(action);
 }
 
 void SIMIX_process_sleep_destroy(smx_action_t action)
 {
-  DEBUG1("Destroy action %p", action);
-  if (action->name)
-    xbt_free(action->name);
+  XBT_DEBUG("Destroy action %p", action);
   if (action->sleep.surf_sleep)
     action->sleep.surf_sleep->model_type->action_unref(action->sleep.surf_sleep);
-#ifdef HAVE_TRACING
-  TRACE_smx_action_destroy(action);
-#endif
-  xbt_fifo_free(action->request_list);
-  xbt_free(action);
+  xbt_mallocator_release(simix_global->action_mallocator, action);
 }
 
 void SIMIX_process_sleep_suspend(smx_action_t action)
@@ -499,31 +585,38 @@ void SIMIX_process_sleep_resume(smx_action_t action)
 }
 
 /** 
- * Calling this function makes the process to yield.
- * Only the processes can call this function, giving back the control to maestro
+ * \brief Calling this function makes the process to yield.
+ *
+ * Only the current process can call this function, giving back the control to
+ * maestro.
+ *
+ * \param self the current process
  */
-void SIMIX_process_yield(void)
+void SIMIX_process_yield(smx_process_t self)
 {
-  smx_process_t self = SIMIX_process_self();
-
-  DEBUG1("Yield process '%s'", self->name);
+  XBT_DEBUG("Yield process '%s'", self->name);
 
   /* Go into sleep and return control to maestro */
   SIMIX_context_suspend(self->context);
 
   /* Ok, maestro returned control to us */
-  DEBUG1("Maestro returned control to me: '%s'", self->name);
+  XBT_DEBUG("Control returned to me: '%s'", self->name);
 
   if (self->context->iwannadie){
-    DEBUG0("I wanna die!");
+    XBT_DEBUG("I wanna die!");
     SIMIX_context_stop(self->context);
   }
 
   if (self->doexception) {
-    DEBUG0("Wait, maestro left me an exception");
+    XBT_DEBUG("Wait, maestro left me an exception");
     self->doexception = 0;
     RETHROW;
   }
+  
+  if (self->new_host) {
+    SIMIX_process_change_host(self, self->new_host);
+    self->new_host = NULL;
+  }
 }
 
 /* callback: context fetching */
@@ -542,6 +635,15 @@ void SIMIX_process_exception_terminate(xbt_ex_t * e)
 smx_context_t SIMIX_process_get_context(smx_process_t p) {
   return p->context;
 }
+
 void SIMIX_process_set_context(smx_process_t p,smx_context_t c) {
   p->context = c;
 }
+
+/**
+ * \brief Returns the list of processes to run.
+ */
+XBT_INLINE xbt_dynar_t SIMIX_process_get_runnable(void)
+{
+  return simix_global->process_to_run;
+}