src/mc/mc_state.c

   1 /* Copyright (c) 2008-2012 Da SimGrid Team. All rights reserved.            */
   2
   3 /* This program is free software; you can redistribute it and/or modify it
   4  * under the terms of the license (GNU LGPL) which comes with this package. */
   5
   6 #include "../simix/smx_private.h"
   7 #include "xbt/fifo.h"
   8 #include "mc_private.h"
   9
  10 /**
  11  * \brief Creates a state data structure used by the exploration algorithm
  12  */
  13 mc_state_t MC_state_new()
  14 {
  15   mc_state_t state = NULL;
  16
  17   state = xbt_new0(s_mc_state_t, 1);
  18   state->max_pid = simix_process_maxpid;
  19   state->proc_status = xbt_new0(s_mc_procstate_t, state->max_pid);
  20   state->system_state = NULL;
  21
  22   mc_stats->expanded_states++;
  23   return state;
  24 }
  25
  26 mc_state_t MC_state_pair_new(void)
  27 {
  28   mc_state_t state = NULL;
  29
  30   state = xbt_new0(s_mc_state_t, 1);
  31   state->max_pid = simix_process_maxpid;
  32   state->proc_status = xbt_new0(s_mc_procstate_t, state->max_pid);
  33
  34   //mc_stats->expanded_states++;
  35   return state;
  36 }
  37
  38 /**
  39  * \brief Deletes a state data structure
  40  * \param trans The state to be deleted
  41  */
  42 void MC_state_delete(mc_state_t state)
  43 {
  44   if(state->system_state)
  45     MC_free_snapshot(state->system_state);
  46   xbt_free(state->proc_status);
  47   xbt_free(state);
  48 }
  49
  50 void MC_state_interleave_process(mc_state_t state, smx_process_t process)
  51 {
  52   state->proc_status[process->pid].state = MC_INTERLEAVE;
  53   state->proc_status[process->pid].interleave_count = 0;
  54 }
  55
  56 void MC_state_remove_interleave_process(mc_state_t state, smx_process_t process)
  57 {
  58   if(state->proc_status[process->pid].state == MC_INTERLEAVE)
  59     state->proc_status[process->pid].state = MC_DONE;
  60 }
  61
  62 unsigned int MC_state_interleave_size(mc_state_t state)
  63 {
  64   unsigned int i, size=0;
  65
  66   for(i=0; i < state->max_pid; i++){
  67     if(state->proc_status[i].state == MC_INTERLEAVE)
  68       size++;
  69   }
  70
  71   return size;
  72 }
  73
  74 int MC_state_process_is_done(mc_state_t state, smx_process_t process){
  75   return state->proc_status[process->pid].state == MC_DONE ? TRUE : FALSE;
  76 }
  77
  78 void MC_state_set_executed_request(mc_state_t state, smx_simcall_t req, int value)
  79 {
  80   state->executed_req = *req;
  81   state->req_num = value;
  82
  83   /* The waitany and testany request are transformed into a wait or test request over the
  84    * corresponding communication action so it can be treated later by the dependence
  85    * function. */
  86   switch(req->call){
  87     case SIMCALL_COMM_WAITANY:
  88       state->internal_req.call = SIMCALL_COMM_WAIT;
  89       state->internal_req.issuer = req->issuer;
  90       state->internal_comm = *xbt_dynar_get_as(simcall_comm_waitany__get__comms(req), value, smx_action_t);
  91       simcall_comm_wait__set__comm(&state->internal_req, &state->internal_comm);
  92       simcall_comm_wait__set__timeout(&state->internal_req, 0);
  93       break;
  94
  95     case SIMCALL_COMM_TESTANY:
  96       state->internal_req.call = SIMCALL_COMM_TEST;
  97       state->internal_req.issuer = req->issuer;
  98
  99       if(value > 0)
 100         state->internal_comm = *xbt_dynar_get_as(simcall_comm_testany__get__comms(req), value, smx_action_t);
 101
 102       simcall_comm_test__set__comm(&state->internal_req, &state->internal_comm);
 103       simcall_comm_test__set__result(&state->internal_req, value);
 104       break;
 105
 106     case SIMCALL_COMM_WAIT:
 107       state->internal_req = *req;
 108       state->internal_comm = *(simcall_comm_wait__get__comm(req));
 109       simcall_comm_wait__set__comm(&state->executed_req, &state->internal_comm);
 110       simcall_comm_wait__set__comm(&state->internal_req, &state->internal_comm);
 111       break;
 112
 113     case SIMCALL_COMM_TEST:
 114       state->internal_req = *req;
 115       state->internal_comm = *simcall_comm_test__get__comm(req);
 116       simcall_comm_test__set__comm(&state->executed_req, &state->internal_comm);
 117       simcall_comm_test__set__comm(&state->internal_req, &state->internal_comm);
 118       break;
 119
 120     default:
 121       state->internal_req = *req;
 122       break;
 123   }
 124 }
 125
 126 smx_simcall_t MC_state_get_executed_request(mc_state_t state, int *value)
 127 {
 128   *value = state->req_num;
 129   return &state->executed_req;
 130 }
 131
 132 smx_simcall_t MC_state_get_internal_request(mc_state_t state)
 133 {
 134   return &state->internal_req;
 135 }
 136
 137 smx_simcall_t MC_state_get_request(mc_state_t state, int *value)
 138 {
 139   smx_process_t process = NULL;
 140   mc_procstate_t procstate = NULL;
 141   unsigned int start_count;
 142
 143   xbt_swag_foreach(process, simix_global->process_list){
 144     procstate = &state->proc_status[process->pid];
 145
 146     if(procstate->state == MC_INTERLEAVE){
 147       if(MC_process_is_enabled(process)){
 148         switch(process->simcall.call){
 149           case SIMCALL_COMM_WAITANY:
 150             *value = -1;
 151             while(procstate->interleave_count < xbt_dynar_length(simcall_comm_waitany__get__comms(&process->simcall))){
 152               if(MC_request_is_enabled_by_idx(&process->simcall, procstate->interleave_count++)){
 153                 *value = procstate->interleave_count-1;
 154                 break;
 155               }
 156             }
 157
 158             if(procstate->interleave_count >= xbt_dynar_length(simcall_comm_waitany__get__comms(&process->simcall)))
 159               procstate->state = MC_DONE;
 160
 161             if(*value != -1)
 162               return &process->simcall;
 163
 164             break;
 165
 166           case SIMCALL_COMM_TESTANY:
 167             start_count = procstate->interleave_count;
 168             *value = -1;
 169             while(procstate->interleave_count < xbt_dynar_length(simcall_comm_testany__get__comms(&process->simcall))){
 170               if(MC_request_is_enabled_by_idx(&process->simcall, procstate->interleave_count++)){
 171                 *value = procstate->interleave_count - 1;
 172                 break;
 173               }
 174             }
 175
 176             if(procstate->interleave_count >= xbt_dynar_length(simcall_comm_testany__get__comms(&process->simcall)))
 177               procstate->state = MC_DONE;
 178
 179             if(*value != -1 || start_count == 0)
 180               return &process->simcall;
 181
 182             break;
 183
 184           case SIMCALL_COMM_WAIT:
 185             if(simcall_comm_wait__get__comm(&process->simcall)->comm.src_proc
 186                && simcall_comm_wait__get__comm(&process->simcall)->comm.dst_proc){
 187               *value = 0;
 188             }else{
 189               *value = -1;
 190             }
 191             procstate->state = MC_DONE;
 192             return &process->simcall;
 193
 194             break;
 195
 196           default:
 197             procstate->state = MC_DONE;
 198             *value = 0;
 199             return &process->simcall;
 200             break;
 201         }
 202       }
 203     }
 204   }
 205
 206   return NULL;
 207 }