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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 2 | pj | 1 | /* Project: OSLib |
| 2 | * Description: The OS Construction Kit |
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| 3 | * Date: 1.6.2000 |
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| 4 | * Idea by: Luca Abeni & Gerardo Lamastra |
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| 5 | * |
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| 6 | * OSLib is an SO project aimed at developing a common, easy-to-use |
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| 7 | * low-level infrastructure for developing OS kernels and Embedded |
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| 8 | * Applications; it partially derives from the HARTIK project but it |
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| 9 | * currently is independently developed. |
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| 10 | * |
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| 11 | * OSLib is distributed under GPL License, and some of its code has |
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| 12 | * been derived from the Linux kernel source; also some important |
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| 13 | * ideas come from studying the DJGPP go32 extender. |
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| 14 | * |
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| 15 | * We acknowledge the Linux Community, Free Software Foundation, |
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| 16 | * D.J. Delorie and all the other developers who believe in the |
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| 17 | * freedom of software and ideas. |
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| 18 | * |
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| 19 | * For legalese, check out the included GPL license. |
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| 20 | */ |
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| 21 | |||
| 22 | /* Time Event routines (one shot mode) */ |
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| 23 | |||
| 24 | #include <ll/i386/stdlib.h> |
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| 25 | #include <ll/i386/mem.h> |
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| 26 | #include <ll/i386/pit.h> |
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| 27 | #include <ll/sys/ll/ll-data.h> |
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| 28 | #include <ll/sys/ll/time.h> |
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| 29 | #include <ll/sys/ll/event.h> |
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| 30 | |||
| 31 | FILE(EventOneShot); |
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| 32 | |||
| 33 | extern int activeInt; |
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| 34 | int activeEvent; |
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| 35 | |||
| 36 | extern BYTE frc; |
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| 37 | |||
| 38 | extern struct event eventlist[MAX_EVENT]; |
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| 39 | extern WORD lastTime; |
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| 40 | extern struct pitspec globalCounter; |
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| 41 | |||
| 42 | extern struct event *freeevents; |
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| 43 | extern struct event *firstevent; |
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| 44 | |||
| 45 | extern void (*evt_prol) (void); |
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| 46 | extern void (*evt_epil) (void); |
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| 47 | |||
| 48 | /* TODO: oneshot_event_delete & oneshot_event_init... */ |
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| 49 | |||
| 50 | /* Switched to timespec */ |
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| 51 | int oneshot_event_post(struct timespec time, void (*handler) (void *p), |
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| 52 | void *par) |
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| 53 | { |
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| 54 | struct event *p; |
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| 55 | struct event *p1, *t; |
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| 56 | struct timespec now, tmp; |
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| 57 | int done; |
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| 58 | DWORD tnext; |
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| 59 | |||
| 60 | if (!freeevents) { |
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| 61 | return -1; |
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| 62 | } |
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| 63 | /* Extract from the ``free events'' queue */ |
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| 64 | p = freeevents; |
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| 65 | freeevents = p->next; |
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| 66 | |||
| 67 | /* Fill the event fields */ |
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| 68 | p->handler = handler; |
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| 69 | TIMESPEC_ASSIGN(&(p->time), &time); |
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| 70 | p->par = par; |
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| 71 | |||
| 72 | /* ...And insert it in the event queue!!! */ |
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| 73 | |||
| 74 | t = NULL; |
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| 75 | done = 0; |
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| 76 | /* walk through list, finding spot, adjusting ticks parameter */ |
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| 77 | for (p1 = firstevent; p1; p1 = t->next) { |
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| 78 | if (TIMESPEC_A_GT_B((&time), (&p1->time))) { |
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| 79 | t = p1; |
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| 80 | } else |
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| 81 | break; |
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| 82 | } |
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| 83 | |||
| 84 | /* adjust next entry */ |
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| 85 | if (t) { |
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| 86 | t->next = p; |
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| 87 | } else { |
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| 88 | firstevent = p; |
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| 89 | if (!activeEvent) { |
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| 90 | ll_gettime(TIME_EXACT, &now); |
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| 91 | if (TIMESPEC_A_GT_B(&now, &(firstevent->time))) { |
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| 92 | NULL_TIMESPEC(&tmp); |
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| 93 | } else { |
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| 94 | SUBTIMESPEC(&(firstevent->time), &now, &tmp); |
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| 95 | } |
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| 96 | tnext = TIMESPEC2USEC(&tmp); |
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| 97 | tnext = (tnext * 1197) / 1000; |
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| 98 | pit_setconstant(0, tnext); |
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| 99 | } |
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| 100 | } |
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| 101 | p->next = p1; |
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| 102 | |||
| 103 | return p->index; |
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| 104 | } |
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| 105 | |||
| 106 | |||
| 107 | |||
| 108 | void oneshot_wake_up(void) |
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| 109 | { /* CHANGE the NAME, please... */ |
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| 110 | struct event *p = NULL, *pp; |
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| 111 | struct timespec now, ttmp; |
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| 112 | WORD tmp; |
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| 113 | DWORD tnext; |
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| 114 | |||
| 115 | tmp = pit_read(frc); |
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| 116 | ADDPITSPEC((WORD) (lastTime - tmp), &globalCounter); |
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| 117 | lastTime = tmp; |
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| 118 | |||
| 119 | PITSPEC2TIMESPEC(&globalCounter, &now); |
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| 120 | |||
| 121 | if (firstevent != NULL) { |
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| 122 | activeEvent = 1; |
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| 123 | if (TIMESPEC_A_GT_B(&now, &(firstevent->time))) { |
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| 124 | if (!activeInt && evt_prol != NULL) { |
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| 125 | evt_prol(); |
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| 126 | } |
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| 127 | activeInt++; |
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| 128 | |||
| 129 | for (p = firstevent; p != NULL; p = pp) { |
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| 130 | if ((p->time.tv_sec > now.tv_sec) || |
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| 131 | ((p->time.tv_sec == now.tv_sec) |
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| 132 | && (p->time.tv_nsec > now.tv_nsec))) { |
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| 133 | break; |
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| 134 | } |
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| 135 | pp = p->next; |
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| 136 | p->next = freeevents; |
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| 137 | freeevents = p; |
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| 138 | firstevent = pp; |
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| 139 | p->handler(p->par); |
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| 140 | } |
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| 141 | |||
| 142 | if (activeInt == 1 && evt_epil != NULL) { |
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| 143 | evt_epil(); |
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| 144 | } |
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| 145 | activeInt--; |
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| 146 | } |
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| 147 | tmp = pit_read(frc); |
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| 148 | ADDPITSPEC((WORD) (lastTime - tmp), &globalCounter); |
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| 149 | lastTime = tmp; |
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| 150 | |||
| 151 | PITSPEC2TIMESPEC(&globalCounter, &now); |
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| 152 | |||
| 153 | |||
| 154 | if (TIMESPEC_A_GT_B(&now, &(firstevent->time))) { |
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| 155 | NULL_TIMESPEC(&ttmp); |
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| 156 | } else { |
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| 157 | SUBTIMESPEC(&(firstevent->time), &now, &ttmp); |
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| 158 | } |
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| 159 | /* SUBTIMESPEC(&(firstevent->time), &now, &ttmp); */ |
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| 160 | tnext = TIMESPEC2USEC(&ttmp); |
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| 161 | tnext = (tnext * 1197) / 1000; |
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| 162 | pit_setconstant(0, tnext); |
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| 163 | |||
| 164 | activeEvent = 0; |
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| 165 | } else { |
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| 166 | pit_setconstant(0, 0xFFFF); |
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| 167 | } |
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| 168 | } |
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| 169 | |||
| 170 | int oneshot_event_delete(int index) |
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| 171 | { |
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| 172 | struct event *p1, *t; |
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| 173 | struct timespec tmp, now; |
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| 174 | DWORD tnext; |
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| 175 | int firstdeleted = FALSE; |
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| 176 | |||
| 177 | t = NULL; |
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| 178 | /* walk through list, finding spot, adjusting ticks parameter */ |
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| 179 | |||
| 180 | for (p1 = firstevent; (p1) && (index != p1->index); p1 = t->next) { |
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| 181 | t = p1; |
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| 182 | } |
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| 183 | |||
| 184 | if (p1 == NULL) { |
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| 185 | return -1; |
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| 186 | } |
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| 187 | if (t == NULL) { |
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| 188 | firstevent = p1->next; |
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| 189 | firstdeleted = TRUE; |
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| 190 | } else { |
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| 191 | t->next = p1->next; |
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| 192 | } |
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| 193 | |||
| 194 | p1->next = freeevents; |
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| 195 | freeevents = p1; |
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| 196 | |||
| 197 | if (!activeEvent) { |
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| 198 | if (firstevent == NULL) { |
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| 199 | pit_setconstant(0, 0xFFFF); |
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| 200 | } else { |
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| 201 | if (firstdeleted) { |
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| 202 | ll_gettime(TIME_EXACT, &now); |
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| 203 | if (TIMESPEC_A_GT_B(&now, &(firstevent->time))) { |
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| 204 | NULL_TIMESPEC(&tmp); |
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| 205 | } else { |
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| 206 | SUBTIMESPEC(&(firstevent->time), &now, &tmp); |
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| 207 | } |
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| 208 | /*SUBTIMESPEC(&now, &(firstevent->time), &tmp); */ |
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| 209 | tnext = TIMESPEC2USEC(&tmp); |
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| 210 | tnext = (tnext * 1197) / 1000; |
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| 211 | pit_setconstant(0, tnext); |
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| 212 | } |
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| 213 | } |
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| 214 | } |
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| 215 | return 1; |
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| 216 | } |