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[simgrid.git] / src / mc / mc_state.c
1 #include "../simix/private.h"
2 #include "xbt/fifo.h"
3 #include "private.h"
4
5 /**
6  * \brief Creates a state data structure used by the exploration algorithm
7  */
8 mc_state_t MC_state_new(void)
9 {
10   mc_state_t state = NULL;
11   
12   state = xbt_new0(s_mc_state_t, 1);
13   state->max_pid = simix_process_maxpid;
14   state->proc_status = xbt_new0(s_mc_procstate_t, state->max_pid);
15   
16   mc_stats->expanded_states++;
17   return state;
18 }
19
20 /**
21  * \brief Deletes a state data structure
22  * \param trans The state to be deleted
23  */
24 void MC_state_delete(mc_state_t state)
25 {
26   xbt_free(state->proc_status);
27   xbt_free(state);
28 }
29
30 void MC_state_interleave_process(mc_state_t state, smx_process_t process)
31 {
32   state->proc_status[process->pid].state = MC_INTERLEAVE;
33   state->proc_status[process->pid].interleave_count = 0;
34 }
35
36 unsigned int MC_state_interleave_size(mc_state_t state)
37 {
38   unsigned int i, size=0;
39
40   for(i=0; i < state->max_pid; i++){
41     if(state->proc_status[i].state == MC_INTERLEAVE)
42       size++;
43   }
44
45   return size;
46 }
47
48 int MC_state_process_is_done(mc_state_t state, smx_process_t process){
49   return state->proc_status[process->pid].state == MC_DONE ? TRUE : FALSE;
50 }
51
52 void MC_state_set_executed_request(mc_state_t state, smx_req_t req, int value)
53 {
54   state->executed_req = *req;
55   state->req_num = value;
56
57   /* The waitany and testany request are transformed into a wait or test request over the
58    * corresponding communication action so it can be treated later by the dependence
59    * function. */
60   switch(req->call){
61     case REQ_COMM_WAITANY:
62       state->internal_req.call = REQ_COMM_WAIT;
63       state->internal_req.issuer = req->issuer;
64       state->internal_comm = *xbt_dynar_get_as(req->comm_waitany.comms, value, smx_action_t);
65       state->internal_req.comm_wait.comm = &state->internal_comm;
66       state->internal_req.comm_wait.timeout = 0;
67       break;
68
69     case REQ_COMM_TESTANY:
70       state->internal_req.call = REQ_COMM_TEST;
71       state->internal_req.issuer = req->issuer;
72
73       if(value > 0)
74         state->internal_comm = *xbt_dynar_get_as(req->comm_testany.comms, value, smx_action_t);
75
76       state->internal_req.comm_wait.comm = &state->internal_comm;
77       state->internal_req.comm_test.result = value;
78       break;
79
80     case REQ_COMM_WAIT:
81       state->internal_req = *req;
82       state->internal_comm = *(req->comm_wait.comm);
83       state->executed_req.comm_wait.comm = &state->internal_comm;
84       state->internal_req.comm_wait.comm = &state->internal_comm;
85       break;
86
87     case REQ_COMM_TEST:
88       state->internal_req = *req;
89       state->internal_comm = *req->comm_test.comm;
90       state->executed_req.comm_test.comm = &state->internal_comm;
91       state->internal_req.comm_test.comm = &state->internal_comm;
92       break;
93
94     default:
95       state->internal_req = *req;
96       break;
97   }
98 }
99
100 smx_req_t MC_state_get_executed_request(mc_state_t state, int *value)
101 {
102   *value = state->req_num;
103   return &state->executed_req;
104 }
105
106 smx_req_t MC_state_get_internal_request(mc_state_t state)
107 {
108   return &state->internal_req;
109 }
110
111 smx_req_t MC_state_get_request(mc_state_t state, int *value)
112 {
113   smx_process_t process = NULL;
114   mc_procstate_t procstate = NULL;
115   unsigned int start_count;
116
117   xbt_swag_foreach(process, simix_global->process_list){
118     procstate = &state->proc_status[process->pid];
119
120     if(procstate->state == MC_INTERLEAVE){
121       if(MC_process_is_enabled(process)){
122         switch(process->request.call){
123           case REQ_COMM_WAITANY:
124             *value = -1;
125             while(procstate->interleave_count < xbt_dynar_length(process->request.comm_waitany.comms)){
126               if(MC_request_is_enabled_by_idx(&process->request, procstate->interleave_count++)){
127                 *value = procstate->interleave_count-1;
128                 break;
129               }
130             }
131
132             if(procstate->interleave_count >= xbt_dynar_length(process->request.comm_waitany.comms))
133               procstate->state = MC_DONE;
134
135             if(*value != -1)
136               return &process->request;
137
138             break;
139
140           case REQ_COMM_TESTANY:
141             start_count = procstate->interleave_count;
142             *value = -1;
143             while(procstate->interleave_count < xbt_dynar_length(process->request.comm_testany.comms)){
144               if(MC_request_is_enabled_by_idx(&process->request, procstate->interleave_count++)){
145                 *value = procstate->interleave_count - 1;
146                 break;
147               }
148             }
149
150             if(procstate->interleave_count >= xbt_dynar_length(process->request.comm_testany.comms))
151               procstate->state = MC_DONE;
152
153             if(*value != -1 || start_count == 0)
154               return &process->request;
155
156             break;
157
158           case REQ_COMM_WAIT:
159             if(process->request.comm_wait.comm->comm.src_proc
160                && process->request.comm_wait.comm->comm.dst_proc){
161               *value = 0;
162             }else{
163               *value = -1;
164             }
165             procstate->state = MC_DONE;
166             return &process->request;
167
168             break;
169
170           default:
171             procstate->state = MC_DONE;
172             *value = 0;
173             return &process->request;
174             break;
175         }
176       }
177     }
178   }
179
180   return NULL;
181 }