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Rev | Author | Line No. | Line |
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1333 | giacomo | 1 | /* |
2 | * Project: S.Ha.R.K. |
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3 | * |
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4 | * Coordinators: Giorgio Buttazzo <giorgio@sssup.it> |
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5 | * |
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6 | * ReTiS Lab (Scuola Superiore S.Anna - Pisa - Italy) |
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7 | * |
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8 | * http://www.sssup.it |
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9 | * http://retis.sssup.it |
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10 | * http://shark.sssup.it |
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11 | */ |
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12 | |||
13 | #include "chimera.h" |
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14 | |||
15 | struct action_event *first_action_event = NULL; |
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1395 | giacomo | 16 | struct action_event *action_event_list; |
17 | int total_events = 0; |
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1333 | giacomo | 18 | |
1395 | giacomo | 19 | int get_free_slot(); |
20 | |||
21 | int init_action_event(int number_of_events) { |
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22 | |||
23 | action_event_list = calloc(number_of_events * sizeof(struct action_event),0); |
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24 | total_events = number_of_events; |
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25 | |||
26 | if (action_event_list != NULL) return 0; |
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27 | |||
28 | total_events = 0; |
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29 | return -1; |
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30 | |||
31 | } |
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32 | |||
1333 | giacomo | 33 | int insert_action_event(struct action_event *e) { |
34 | |||
35 | struct action_event *t = first_action_event, *k = NULL; |
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1395 | giacomo | 36 | int free; |
1333 | giacomo | 37 | |
38 | SYS_FLAGS f; |
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39 | |||
40 | f = kern_fsave(); |
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41 | |||
1395 | giacomo | 42 | free = get_free_slot(); |
43 | |||
44 | if (free != -1) { |
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45 | |||
46 | memcpy(&(action_event_list[free]),e,sizeof(struct action_event)); |
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47 | e = &(action_event_list[free]); |
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48 | |||
49 | } else { |
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50 | |||
51 | return -1; |
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52 | |||
53 | } |
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54 | |||
1334 | giacomo | 55 | e->status = EVT_STATUS_WAIT; |
56 | |||
1333 | giacomo | 57 | if (!t) { |
58 | |||
59 | first_action_event = e; |
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60 | e->next = NULL; |
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61 | kern_frestore(f); |
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62 | return 0; |
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63 | |||
64 | } |
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65 | |||
66 | while(t) { |
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67 | if (TIMESPEC_A_LT_B(&e->time,&t->time)) |
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68 | break; |
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69 | k = t; |
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70 | t = t->next; |
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71 | } |
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72 | |||
73 | t = k->next; |
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74 | k->next = e; |
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75 | e->next = t; |
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76 | |||
77 | t = first_action_event; |
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78 | |||
79 | kern_frestore(f); |
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80 | |||
1395 | giacomo | 81 | return free; |
1333 | giacomo | 82 | |
83 | } |
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84 | |||
1395 | giacomo | 85 | int delete_action_event(int event) { |
1333 | giacomo | 86 | |
87 | struct action_event *t = first_action_event; |
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1395 | giacomo | 88 | struct action_event *e = &(action_event_list[event]); |
1333 | giacomo | 89 | |
90 | SYS_FLAGS f; |
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91 | |||
1395 | giacomo | 92 | if ((!t || !e) && (e->status != EVT_STATUS_FREE)) return -1; |
1333 | giacomo | 93 | |
94 | f = kern_fsave(); |
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95 | |||
96 | if (t == e) { |
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97 | |||
98 | first_action_event = t->next; |
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1395 | giacomo | 99 | e->status = EVT_STATUS_FREE; |
1333 | giacomo | 100 | kern_frestore(f); |
101 | return 0; |
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102 | |||
103 | } |
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104 | |||
105 | while(t) { |
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106 | if (t->next == e) |
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107 | break; |
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108 | t = t->next; |
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109 | } |
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110 | |||
111 | if (t) { |
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112 | t->next = e->next; |
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1395 | giacomo | 113 | e->status = EVT_STATUS_FREE; |
1333 | giacomo | 114 | kern_frestore(f); |
115 | return 0; |
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116 | } |
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117 | |||
118 | kern_frestore(f); |
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119 | |||
120 | return -1; |
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121 | |||
122 | } |
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123 | |||
1395 | giacomo | 124 | int get_free_slot() { |
125 | |||
126 | int k = 0; |
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127 | |||
128 | while (k < total_events) { |
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129 | |||
130 | if (action_event_list[k].status == EVT_STATUS_FREE || |
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131 | action_event_list[k].status == EVT_STATUS_DONE) |
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132 | return k; |
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133 | k++; |
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134 | |||
135 | } |
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136 | |||
137 | return -1; |
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138 | |||
139 | } |
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140 | |||
1333 | giacomo | 141 | struct action_event * get_first_old_event(struct timespec *time) { |
142 | |||
143 | struct action_event *t = first_action_event; |
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144 | SYS_FLAGS f; |
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145 | |||
146 | if (!t) return NULL; |
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147 | |||
148 | f = kern_fsave(); |
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149 | |||
150 | if (TIMESPEC_A_GT_B(time,&(t->time))) { |
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151 | first_action_event = t->next; |
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1334 | giacomo | 152 | t->status = EVT_STATUS_EXEC; |
1333 | giacomo | 153 | kern_frestore(f); |
154 | return t; |
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155 | } |
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156 | |||
157 | kern_frestore(f); |
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158 | return NULL; |
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159 | |||
160 | } |