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3
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1 #include <stdio.h>
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5
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2 #include <stdlib.h>
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3
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3 #include "MailManager.h"
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4
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19
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5 MailManager::MailManager(void)
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6 {
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7 mailQueuePool = NULL;
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8 freeMailQueue = NULL;
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9 }
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10
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20
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11 MailManager::~MailManager(void)
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12 {
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13 destroy_mailQueue();
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14 }
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15
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3
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16 int
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17 MailManager::init_pool_mailQueue(int num)
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18 {
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19 if (!mailQueuePool) {
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20 return extend_pool_mailQueue(num);
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21 }
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22 return 0;
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23 }
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24
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25 int
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26 MailManager::extend_pool_mailQueue(int num)
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27 {
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28 MailQueuePtr q;
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29
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5
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30 q = (MailQueuePtr)malloc(sizeof(MailQueue)*(num+1));
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3
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31
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32 if (q == NULL) {
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33 return -1;
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34 }
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35 q->next = mailQueuePool;
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36 mailQueuePool = q;
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37
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38 /* Connect all free queue in the pool */
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6
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39 for (q = mailQueuePool + 1; --num > 0; q++) {
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3
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40 q->next = q + 1;
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41 }
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42 q->next = freeMailQueue;
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43 freeMailQueue = mailQueuePool + 1;
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44
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45 return 0;
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46 }
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47
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48 MailQueuePtr
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49 MailManager::create_mail(unsigned int data)
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50 {
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51 return get_free_mailQueue(data);
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52 }
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53
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54 MailQueuePtr
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55 MailManager::get_free_mailQueue(unsigned int data)
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56 {
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57 MailQueuePtr q;
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58
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59 if (!freeMailQueue) {
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60 extend_pool_mailQueue(30);
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61 }
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62 q = freeMailQueue;
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63 freeMailQueue = freeMailQueue->next;
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64
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65 q->data = data;
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66 q->next = NULL;
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67
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68 return q;
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69 }
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70
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71 void
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72 MailManager::free_mailQueue(MailQueuePtr q)
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73 {
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74 q->next = freeMailQueue;
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75 freeMailQueue = q;
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76 }
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77
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78
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20
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79 void
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80 MailManager::destroy_mailQueue(void)
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81 {
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82 MailQueuePtr q;
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83
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84 for (q = mailQueuePool; q; q = q->next) {
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85 free(q);
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86 }
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87 freeMailQueue = mailQueuePool = NULL;
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88 }
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89
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90
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3
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91 MailQueuePtr
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92 append_mailQueue(MailQueuePtr list, MailQueuePtr q)
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93 {
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94 MailQueuePtr p = list;
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95
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96 if (p == NULL) {
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97 return q;
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98 } else {
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99 while(p->next) p = p->next;
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100 p->next = q;
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101 return list;
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102 }
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103 }
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