Revision 997
Started on drawing robots in the right place.
| robot.c | ||
|---|---|---|
| 31 | 31 |
Robot* robots = NULL; |
| 32 | 32 |
int robots_size = 0; |
| 33 | 33 |
|
| 34 |
int iterator_pos = 0; |
|
| 35 |
|
|
| 34 | 36 |
int robots_initialize(void) |
| 35 | 37 |
{
|
| 38 |
int i; |
|
| 36 | 39 |
if (signal(SIGCHLD, sig_chld_handler) == SIG_ERR) |
| 37 | 40 |
return -1; |
| 38 | 41 |
|
| ... | ... | |
| 41 | 44 |
if (!robots) |
| 42 | 45 |
return -1; |
| 43 | 46 |
memset(robots, 0, sizeof(Robot) * robots_size); |
| 47 |
for (i = 0; i < robots_size; i++) |
|
| 48 |
robots[i].id = -1; |
|
| 44 | 49 |
|
| 45 | 50 |
return 0; |
| 46 | 51 |
} |
| ... | ... | |
| 84 | 89 |
|
| 85 | 90 |
if((pid = fork()) < 0) |
| 86 | 91 |
{
|
| 87 |
|
|
| 88 | 92 |
//Free Shared Memory Region |
| 89 |
if (!shmdt(r->shared))
|
|
| 93 |
if (!shmdt(r->shared)) |
|
| 90 | 94 |
fprintf(stderr, "Failed to free shared memory.\n"); |
| 91 | 95 |
|
| 92 |
if (!shmctl(r->sharedMemID, IPC_RMID, NULL))
|
|
| 93 |
fprintf(stderr, "Failed to free shared memory.\n");
|
|
| 96 |
if (!shmctl(r->sharedMemID, IPC_RMID, NULL)) |
|
| 97 |
fprintf(stderr, "Failed to free shared memory.\n"); |
|
| 94 | 98 |
|
| 95 |
r->id = 0;
|
|
| 99 |
r->id = -1;
|
|
| 96 | 100 |
fprintf(stderr, "Failed to fork robot process.\n"); |
| 97 | 101 |
return -1; |
| 98 |
}
|
|
| 102 |
} |
|
| 99 | 103 |
|
| 100 | 104 |
|
| 101 | 105 |
if(!pid) |
| ... | ... | |
| 161 | 165 |
} |
| 162 | 166 |
|
| 163 | 167 |
memset(r, 0, sizeof(Robot)); |
| 168 |
r->id = -1; |
|
| 164 | 169 |
|
| 165 | 170 |
if (id < first_available_id) |
| 166 | 171 |
first_available_id = 0; |
| ... | ... | |
| 168 | 173 |
return 0; |
| 169 | 174 |
} |
| 170 | 175 |
|
| 176 |
void robot_iterator_reset(void) |
|
| 177 |
{
|
|
| 178 |
iterator_pos = 0; |
|
| 179 |
} |
|
| 180 |
|
|
| 181 |
// note: addresses may change, replace with |
|
| 182 |
// allocated memory |
|
| 183 |
Robot* robot_iterator_next(void) |
|
| 184 |
{
|
|
| 185 |
while (iterator_pos < robots_size && |
|
| 186 |
robots[iterator_pos].id == -1) |
|
| 187 |
iterator_pos++; |
|
| 188 |
|
|
| 189 |
if (iterator_pos >= robots_size) |
|
| 190 |
return NULL; |
|
| 191 |
|
|
| 192 |
return &(robots[iterator_pos]); |
|
| 193 |
} |
|
| 194 |
|
|
| 171 | 195 |
void sig_chld_handler(int sig) |
| 172 | 196 |
{
|
| 173 | 197 |
pid_t pid; |
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