Chord: reproduce the scenario of the Oversim paper

[simgrid.git] / src / mc / mc_state.c

diff --git a/src/mc/mc_state.c b/src/mc/mc_state.c
index 4137ad3..e289fd1 100644 (file)
--- a/src/mc/mc_state.c
+++ b/src/mc/mc_state.c
@@ -2,8 +2,6 @@
 #include "xbt/fifo.h"
 #include "private.h"
 
-static void MC_state_add_transition(mc_state_t state, mc_transition_t trans);
-
 /**
  * \brief Creates a state data structure used by the exploration algorithm
  */
@@ -13,7 +11,7 @@ mc_state_t MC_state_new(void)
   
   state = xbt_new0(s_mc_state_t, 1);
   state->max_pid = simix_process_maxpid;
-  state->interleave = xbt_new0(char, state->max_pid);
+  state->proc_status = xbt_new0(s_mc_procstate_t, state->max_pid);
   
   mc_stats->expanded_states++;
   return state;
@@ -25,13 +23,14 @@ mc_state_t MC_state_new(void)
  */
 void MC_state_delete(mc_state_t state)
 {
-  xbt_free(state->interleave);
+  xbt_free(state->proc_status);
   xbt_free(state);
 }
 
-void MC_state_add_to_interleave(mc_state_t state, smx_process_t process)
+void MC_state_interleave_process(mc_state_t state, smx_process_t process)
 {
-  state->interleave[process->pid] = 1;
+  state->proc_status[process->pid].state = MC_INTERLEAVE;
+  state->proc_status[process->pid].interleave_count = 0;
 }
 
 unsigned int MC_state_interleave_size(mc_state_t state)
@@ -39,7 +38,7 @@ unsigned int MC_state_interleave_size(mc_state_t state)
   unsigned int i, size=0;
 
   for(i=0; i < state->max_pid; i++){
-    if(state->interleave[i] != 0 && state->interleave[i] != -1)
+    if(state->proc_status[i].state == MC_INTERLEAVE)
       size++;
   }
 
@@ -47,42 +46,66 @@ unsigned int MC_state_interleave_size(mc_state_t state)
 }
 
 int MC_state_process_is_done(mc_state_t state, smx_process_t process){
-  return state->interleave[process->pid] == -1 ? TRUE : FALSE;
+  return state->proc_status[process->pid].state == MC_DONE ? TRUE : FALSE;
 }
 
-void MC_state_set_executed_request(mc_state_t state, smx_req_t req)
+void MC_state_set_executed_request(mc_state_t state, smx_req_t req, unsigned int value)
 {
+  state->executed_value = value;
   state->executed = *req;
 }
 
-smx_req_t MC_state_get_executed_request(mc_state_t state)
+smx_req_t MC_state_get_executed_request(mc_state_t state, unsigned int *value)
 {
+  *value = state->executed_value;
   return &state->executed;
 }
 
-smx_req_t MC_state_get_request(mc_state_t state, char *value)
+smx_req_t MC_state_get_request(mc_state_t state, unsigned int *value)
 {
-  unsigned int i;
   smx_process_t process = NULL;
-
-  for(i=0; i < state->max_pid; i++){
-    if(state->interleave[i] > 0){
-      *value = state->interleave[i]--;
-
-      /* If 0 was reached means that the process is done, so we
-       * set it's value to -1 (the "done" value) */
-      if(state->interleave[i] == 0)
-        state->interleave[i]--;
-
-      /* FIXME: SIMIX should implement a process table indexed by pid */
-      /* So we should use that instead of traversing the swag */
-      xbt_swag_foreach(process, simix_global->process_list){
-        if(process->pid == i)
-          break;
+  mc_procstate_t procstate = NULL;
+
+
+  xbt_swag_foreach(process, simix_global->process_list){
+    procstate = &state->proc_status[process->pid];
+
+    if(procstate->state == MC_INTERLEAVE){
+      if(SIMIX_process_is_enabled(process)){
+        switch(process->request.call){
+          case REQ_COMM_WAITANY:
+            while(procstate->interleave_count < xbt_dynar_length(process->request.comm_waitany.comms)){
+              if(SIMIX_request_is_enabled_by_idx(&process->request, procstate->interleave_count++)){
+                *value = procstate->interleave_count - 1;
+                return &process->request;
+              }
+            }
+            procstate->state = MC_DONE;
+            break;
+
+          case REQ_COMM_TESTANY:
+            if(MC_request_testany_fail(&process->request)){
+              procstate->state = MC_DONE;
+              *value = (unsigned int)-1;
+              return &process->request;
+            }
+
+            while(procstate->interleave_count < xbt_dynar_length(process->request.comm_waitany.comms)){
+              if(SIMIX_request_is_enabled_by_idx(&process->request, procstate->interleave_count++)){
+                *value = procstate->interleave_count - 1;
+                return &process->request;
+              }
+            }
+            procstate->state = MC_DONE;
+            break;
+
+          default:
+            procstate->state = MC_DONE;
+            *value = 0;
+            return &process->request;
+            break;
+        }
       }
-
-      if(SIMIX_process_is_enabled(process))
-        return &process->request;
     }
   }