X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/15eb59567704ce6613cefcc628878db5fd8f9bbf..053352ba13737467be4fc66c9a1c92bd84118bee:/src/simix/smx_network.c

diff --git a/src/simix/smx_network.c b/src/simix/smx_network.c
index 941dcce71b..465fba78cd 100644
--- a/src/simix/smx_network.c
+++ b/src/simix/smx_network.c
@@ -1,13 +1,12 @@
-/* 	$Id$	 */
-
-/* Copyright (c) 2009 Cristian Rosa.
-   All rights reserved.                                          */
+/* Copyright (c) 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. */
 
 #include "private.h"
 #include "xbt/log.h"
+#include "mc/mc.h"
 #include "xbt/dict.h"
 
 /* Pimple to get an histogram of message sizes in the simulation */
@@ -85,7 +84,7 @@ smx_comm_t SIMIX_rdv_get_request(smx_rdv_t rdv, smx_comm_type_t type) {
     DEBUG0("Communication request found!");
     xbt_fifo_shift(rdv->comm_fifo);
     SIMIX_communication_use(comm);
-    comm->rdv = NULL;    
+    comm->rdv = NULL;
     return comm;
   }
 
@@ -202,7 +201,7 @@ static inline void SIMIX_communication_use(smx_comm_t comm)
 
 /**
  *  \brief Start the simulation of a communication request
- *  \param comm The   comm->rdv = NULL;communication request
+ *  \param comm The communication request
  */
 static inline void SIMIX_communication_start(smx_comm_t comm)
 {
@@ -239,9 +238,9 @@ static inline void SIMIX_communication_start(smx_comm_t comm)
  *  \param timeout The max amount of time to wait for the communication to finish
  *
  *  Throws:
- *   - host_error if peer failed
- *   - timeout_error if communication reached the timeout specified
- *   - network_error if network failed or peer issued a timeout
+ *   - host_error if local peer failed
+ *   - timeout_error if communication reached the timeout specified (either because of local peer or remote peer)
+ *   - network_error if network failed or remote peer failed
  */
 static inline void SIMIX_communication_wait_for_completion(smx_comm_t comm, double timeout)
 {
@@ -292,7 +291,7 @@ static inline void SIMIX_communication_wait_for_completion(smx_comm_t comm, doub
   SIMIX_sem_release_forever(comm->sem);
   
   /* Check for errors other than timeouts (they are catched above) */
-  if(!SIMIX_host_get_state(SIMIX_host_self())){
+  if (!SIMIX_host_get_state(SIMIX_host_self())){
     if(comm->rdv)
       SIMIX_rdv_remove(comm->rdv, comm);
     SIMIX_communication_destroy(comm);
@@ -300,6 +299,16 @@ static inline void SIMIX_communication_wait_for_completion(smx_comm_t comm, doub
   } else if (SIMIX_action_get_state(comm->act) == SURF_ACTION_FAILED){
     SIMIX_communication_destroy(comm);
     THROW0(network_error, 0, "Link failure");
+  } else if (!SIMIX_host_get_state(SIMIX_process_get_host(comm->dst_proc)) ||
+      !SIMIX_host_get_state(SIMIX_process_get_host(comm->src_proc))) {
+    /* We test both src&dst because we dunno who we are today, and we already tested myself above.
+     *    So, at the end, we test the remote peer only
+     * Moreover, we have to test it because if the remote peer fails, the action comm->act is not done nor failed.
+     *    In that case, we got awaken by the little endless actions created in the SIMIX_sem_acquire(comm->sem)
+     *    at the beginning of this function. */
+    SIMIX_communication_destroy(comm);
+    THROW0(network_error, 0, "Remote peer failed");
+
   }
   SIMIX_communication_destroy(comm);
 }
@@ -459,7 +468,14 @@ smx_comm_t SIMIX_network_isend(smx_rdv_t rdv, double task_size, double rate,
     void *src_buff, size_t src_buff_size, void *data)
 {
   smx_comm_t comm;
+  mc_transition_t trans=NULL;
 
+  if (_surf_do_model_check) {
+    /* Let's intercept the communication and control it from the model-checker */
+    trans = MC_create_transition(mc_isend, SIMIX_process_self(), rdv, NULL);
+    SIMIX_process_yield();
+  }
+  
   /* Look for communication request matching our needs.
      If it is not found then create it and push it into the rendez-vous point */
   comm = SIMIX_rdv_get_request(rdv, comm_recv);
@@ -477,13 +493,24 @@ smx_comm_t SIMIX_network_isend(smx_rdv_t rdv, double task_size, double rate,
   comm->src_buff_size = src_buff_size;
   comm->data = data;
 
+  /* Associate the simix communication to the mc transition */
+  if (_surf_do_model_check)
+    MC_transition_set_comm(trans, comm);
+  
   SIMIX_communication_start(comm);
   return comm;
 }
 
 smx_comm_t SIMIX_network_irecv(smx_rdv_t rdv, void *dst_buff, size_t *dst_buff_size) {
   smx_comm_t comm;
-
+  mc_transition_t trans=NULL;
+  
+  if (_surf_do_model_check) {
+    /* Let's intercept the communication and control it from the model-checker */
+    trans = MC_create_transition(mc_irecv, SIMIX_process_self(), rdv, NULL);
+    SIMIX_process_yield();
+  }
+  
   /* Look for communication request matching our needs.
      If it is not found then create it and push it into the rendez-vous point */
   comm = SIMIX_rdv_get_request(rdv, comm_send);
@@ -498,18 +525,32 @@ smx_comm_t SIMIX_network_irecv(smx_rdv_t rdv, void *dst_buff, size_t *dst_buff_s
   comm->dst_buff = dst_buff;
   comm->dst_buff_size = dst_buff_size;
 
+  /* Associate the simix communication to the mc transition */
+  if (_surf_do_model_check)
+    MC_transition_set_comm(trans, comm);
+ 
   SIMIX_communication_start(comm);
   return comm;
 }
 
 /** @brief blocks until the communication terminates or the timeout occurs */
 XBT_INLINE void SIMIX_network_wait(smx_comm_t comm, double timeout) {
+  if (_surf_do_model_check) {
+    /* Let's intercept the communication and control it from the model-checker */
+    MC_create_transition(mc_wait, SIMIX_process_self(), comm->rdv, comm);
+    SIMIX_process_yield();
+  }
   /* Wait for communication completion */
   SIMIX_communication_wait_for_completion(comm, timeout);
 }
 
 /** @Returns whether the (asynchronous) communication is done yet or not */
 XBT_INLINE int SIMIX_network_test(smx_comm_t comm) {
+  if (_surf_do_model_check) {
+    /* Let's intercept the communication and control it from the model-checker */
+    MC_create_transition(mc_test, SIMIX_process_self(), comm->rdv, comm);
+    SIMIX_process_yield();
+  }
   return comm->sem?SIMIX_sem_would_block(comm->sem):0;
 }
 
@@ -522,6 +563,12 @@ unsigned int SIMIX_network_waitany(xbt_dynar_t comms) {
   unsigned int cursor, found_comm=-1;
   smx_comm_t comm,comm_finished=NULL;
 
+  if (_surf_do_model_check) {
+    /* Let's intercept the communication and control it from the model-checker */
+    MC_create_transition(mc_waitany, SIMIX_process_self(), NULL, NULL);
+    SIMIX_process_yield();
+  }
+  
   xbt_dynar_foreach(comms,cursor,comm){
     xbt_dynar_push(sems,&(comm->sem));
   }