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3
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1 #include <stdio.h>
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2 #include "MailManager.h"
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3
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4 int
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5 MailManager::init_pool_mailQueue(int num)
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6 {
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7 if (!mailQueuePool) {
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8 return extend_pool_mailQueue(num);
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9 }
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10 return 0;
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11 }
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12
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13 int
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14 MailManager::extend_pool_mailQueue(int num)
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15 {
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16 MailQueuePtr q;
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17
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18 q = new MailQueue[num+1];
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19
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20 if (q == NULL) {
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21 return -1;
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22 }
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23 q->next = mailQueuePool;
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24 mailQueuePool = q;
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25
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26 /* Connect all free queue in the pool */
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27 q = mailQueuePool + 1;
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28 for (q = mailQueuePool + 1; num-- > 0; q++) {
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29 q->next = q + 1;
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30 }
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31 q->next = freeMailQueue;
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32 freeMailQueue = mailQueuePool + 1;
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33
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34 return 0;
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35 }
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36
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37 MailQueuePtr
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38 MailManager::create_mail(unsigned int data)
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39 {
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40 return get_free_mailQueue(data);
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41 }
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42
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43 MailQueuePtr
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44 MailManager::get_free_mailQueue(unsigned int data)
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45 {
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46 MailQueuePtr q;
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47
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48 if (!freeMailQueue) {
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49 extend_pool_mailQueue(30);
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50 }
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51 q = freeMailQueue;
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52 freeMailQueue = freeMailQueue->next;
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53
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54 q->data = data;
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55 q->next = NULL;
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56
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57 return q;
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58 }
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59
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60 void
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61 MailManager::free_mailQueue(MailQueuePtr q)
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62 {
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63 q->next = freeMailQueue;
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64 freeMailQueue = q;
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65 }
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66
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67
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68 MailQueuePtr
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69 append_mailQueue(MailQueuePtr list, MailQueuePtr q)
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70 {
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71 MailQueuePtr p = list;
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72
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73 if (p == NULL) {
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74 return q;
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75 } else {
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76 while(p->next) p = p->next;
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77 p->next = q;
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78 return list;
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79 }
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80 }
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