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) || (state->proc_status[i].state == MC_MORE_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   smx_process_t process = NULL;
  83   mc_procstate_t procstate = NULL;
  84
  85   /* The waitany and testany request are transformed into a wait or test request over the
  86    * corresponding communication action so it can be treated later by the dependence
  87    * function. */
  88   switch(req->call){
  89     case SIMCALL_COMM_WAITANY:
  90       state->internal_req.call = SIMCALL_COMM_WAIT;
  91       state->internal_req.issuer = req->issuer;
  92       state->internal_comm = *xbt_dynar_get_as(simcall_comm_waitany__get__comms(req), value, smx_action_t);
  93       simcall_comm_wait__set__comm(&state->internal_req, &state->internal_comm);
  94       simcall_comm_wait__set__timeout(&state->internal_req, 0);
  95       break;
  96
  97     case SIMCALL_COMM_TESTANY:
  98       state->internal_req.call = SIMCALL_COMM_TEST;
  99       state->internal_req.issuer = req->issuer;
 100
 101       if(value > 0)
 102         state->internal_comm = *xbt_dynar_get_as(simcall_comm_testany__get__comms(req), value, smx_action_t);
 103
 104       simcall_comm_test__set__comm(&state->internal_req, &state->internal_comm);
 105       simcall_comm_test__set__result(&state->internal_req, value);
 106       break;
 107
 108     case SIMCALL_COMM_WAIT:
 109       state->internal_req = *req;
 110       state->internal_comm = *(simcall_comm_wait__get__comm(req));
 111       simcall_comm_wait__set__comm(&state->executed_req, &state->internal_comm);
 112       simcall_comm_wait__set__comm(&state->internal_req, &state->internal_comm);
 113       break;
 114
 115     case SIMCALL_COMM_TEST:
 116       state->internal_req = *req;
 117       state->internal_comm = *simcall_comm_test__get__comm(req);
 118       simcall_comm_test__set__comm(&state->executed_req, &state->internal_comm);
 119       simcall_comm_test__set__comm(&state->internal_req, &state->internal_comm);
 120       break;
 121
 122     case SIMCALL_MC_RANDOM:
 123       state->internal_req = *req;
 124       simcall_mc_random__set__result(&state->internal_req, value);
 125       if(value == 0){
 126         xbt_swag_foreach(process, simix_global->process_list){
 127           procstate = &state->proc_status[process->pid];
 128           if(process->pid == req->issuer->pid){
 129             procstate->state = MC_MORE_INTERLEAVE;
 130             break;
 131           }
 132         }
 133       }
 134       break;
 135
 136     default:
 137       state->internal_req = *req;
 138       break;
 139   }
 140 }
 141
 142 smx_simcall_t MC_state_get_executed_request(mc_state_t state, int *value)
 143 {
 144   *value = state->req_num;
 145   return &state->executed_req;
 146 }
 147
 148 smx_simcall_t MC_state_get_internal_request(mc_state_t state)
 149 {
 150   return &state->internal_req;
 151 }
 152
 153 smx_simcall_t MC_state_get_request(mc_state_t state, int *value)
 154 {
 155   smx_process_t process = NULL;
 156   mc_procstate_t procstate = NULL;
 157   unsigned int start_count;
 158
 159   xbt_swag_foreach(process, simix_global->process_list){
 160     procstate = &state->proc_status[process->pid];
 161
 162     if(procstate->state == MC_INTERLEAVE || procstate->state == MC_MORE_INTERLEAVE){
 163       if(MC_process_is_enabled(process)){
 164         switch(process->simcall.call){
 165           case SIMCALL_COMM_WAITANY:
 166             *value = -1;
 167             while(procstate->interleave_count < xbt_dynar_length(simcall_comm_waitany__get__comms(&process->simcall))){
 168               if(MC_request_is_enabled_by_idx(&process->simcall, procstate->interleave_count++)){
 169                 *value = procstate->interleave_count-1;
 170                 break;
 171               }
 172             }
 173
 174             if(procstate->interleave_count >= xbt_dynar_length(simcall_comm_waitany__get__comms(&process->simcall)))
 175               procstate->state = MC_DONE;
 176
 177             if(*value != -1)
 178               return &process->simcall;
 179
 180             break;
 181
 182           case SIMCALL_COMM_TESTANY:
 183             start_count = procstate->interleave_count;
 184             *value = -1;
 185             while(procstate->interleave_count < xbt_dynar_length(simcall_comm_testany__get__comms(&process->simcall))){
 186               if(MC_request_is_enabled_by_idx(&process->simcall, procstate->interleave_count++)){
 187                 *value = procstate->interleave_count - 1;
 188                 break;
 189               }
 190             }
 191
 192             if(procstate->interleave_count >= xbt_dynar_length(simcall_comm_testany__get__comms(&process->simcall)))
 193               procstate->state = MC_DONE;
 194
 195             if(*value != -1 || start_count == 0)
 196               return &process->simcall;
 197
 198             break;
 199
 200           case SIMCALL_COMM_WAIT:
 201             if(simcall_comm_wait__get__comm(&process->simcall)->comm.src_proc
 202                && simcall_comm_wait__get__comm(&process->simcall)->comm.dst_proc){
 203               *value = 0;
 204             }else{
 205               *value = -1;
 206             }
 207             procstate->state = MC_DONE;
 208             return &process->simcall;
 209
 210             break;
 211
 212           case SIMCALL_MC_RANDOM:
 213             if(procstate->state == MC_INTERLEAVE)
 214               *value = 0;
 215             else
 216               *value = 1;
 217             procstate->state = MC_DONE;
 218             return &process->simcall;
 219             break;
 220
 221           default:
 222             procstate->state = MC_DONE;
 223             *value = 0;
 224             return &process->simcall;
 225             break;
 226         }
 227       }
 228     }
 229   }
 230
 231   return NULL;
 232 }