Changeset 42a619b in mainline for kernel/generic/src/ipc/event.c
- Timestamp:
- 2011-08-19T08:58:50Z (14 years ago)
- Branches:
- lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export
- Children:
- 7dcb7981, 903bac0a, c2cf033
- Parents:
- ef7052ec (diff), d894fbd (diff)
Note: this is a merge changeset, the changes displayed below correspond to the merge itself.
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- 1 edited
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kernel/generic/src/ipc/event.c
ref7052ec r42a619b 40 40 #include <synch/spinlock.h> 41 41 #include <console/console.h> 42 #include <proc/task.h> 42 43 #include <memstr.h> 43 44 #include <errno.h> … … 47 48 static event_t events[EVENT_END]; 48 49 50 static void event_initialize(event_t *event) 51 { 52 spinlock_initialize(&event->lock, "event.lock"); 53 event->answerbox = NULL; 54 event->counter = 0; 55 event->imethod = 0; 56 event->masked = false; 57 event->unmask_callback = NULL; 58 } 59 60 static event_t *evno2event(int evno, task_t *t) 61 { 62 ASSERT(evno < EVENT_TASK_END); 63 64 event_t *event; 65 66 if (evno < EVENT_END) 67 event = &events[(event_type_t) evno]; 68 else 69 event = &t->events[(event_task_type_t) evno - EVENT_END]; 70 71 return event; 72 } 73 49 74 /** Initialize kernel events. 50 75 * … … 52 77 void event_init(void) 53 78 { 54 for (unsigned int i = 0; i < EVENT_END; i++) { 55 spinlock_initialize(&events[i].lock, "event.lock"); 56 events[i].answerbox = NULL; 57 events[i].counter = 0; 58 events[i].imethod = 0; 59 events[i].masked = false; 60 events[i].unmask_callback = NULL; 61 } 62 } 79 for (unsigned int i = 0; i < EVENT_END; i++) 80 event_initialize(evno2event(i, NULL)); 81 } 82 83 void event_task_init(task_t *t) 84 { 85 for (unsigned int i = EVENT_END; i < EVENT_TASK_END; i++) 86 event_initialize(evno2event(i, t)); 87 } 88 63 89 64 90 /** Unsubscribe kernel events associated with an answerbox … … 83 109 } 84 110 111 static void _event_set_unmask_callback(event_t *event, event_callback_t callback) 112 { 113 spinlock_lock(&event->lock); 114 event->unmask_callback = callback; 115 spinlock_unlock(&event->lock); 116 } 117 85 118 /** Define a callback function for the event unmask event. 86 119 * … … 94 127 ASSERT(evno < EVENT_END); 95 128 96 spinlock_lock(&events[evno].lock); 97 events[evno].unmask_callback = callback; 98 spinlock_unlock(&events[evno].lock); 129 _event_set_unmask_callback(evno2event(evno, NULL), callback); 130 } 131 132 void event_task_set_unmask_callback(task_t *t, event_task_type_t evno, 133 event_callback_t callback) 134 { 135 ASSERT(evno >= (int) EVENT_END); 136 ASSERT(evno < EVENT_TASK_END); 137 138 _event_set_unmask_callback(evno2event(evno, t), callback); 139 } 140 141 static int event_enqueue(event_t *event, bool mask, sysarg_t a1, sysarg_t a2, 142 sysarg_t a3, sysarg_t a4, sysarg_t a5) 143 { 144 int res; 145 146 spinlock_lock(&event->lock); 147 148 if (event->answerbox != NULL) { 149 if (!event->masked) { 150 call_t *call = ipc_call_alloc(FRAME_ATOMIC); 151 152 if (call) { 153 call->flags |= IPC_CALL_NOTIF; 154 call->priv = ++event->counter; 155 156 IPC_SET_IMETHOD(call->data, event->imethod); 157 IPC_SET_ARG1(call->data, a1); 158 IPC_SET_ARG2(call->data, a2); 159 IPC_SET_ARG3(call->data, a3); 160 IPC_SET_ARG4(call->data, a4); 161 IPC_SET_ARG5(call->data, a5); 162 163 irq_spinlock_lock(&event->answerbox->irq_lock, true); 164 list_append(&call->link, &event->answerbox->irq_notifs); 165 irq_spinlock_unlock(&event->answerbox->irq_lock, true); 166 167 waitq_wakeup(&event->answerbox->wq, WAKEUP_FIRST); 168 169 if (mask) 170 event->masked = true; 171 172 res = EOK; 173 } else 174 res = ENOMEM; 175 } else 176 res = EBUSY; 177 } else 178 res = ENOENT; 179 180 spinlock_unlock(&event->lock); 181 return res; 99 182 } 100 183 … … 123 206 ASSERT(evno < EVENT_END); 124 207 125 spinlock_lock(&events[evno].lock); 126 127 int ret; 128 129 if (events[evno].answerbox != NULL) { 130 if (!events[evno].masked) { 131 call_t *call = ipc_call_alloc(FRAME_ATOMIC); 132 133 if (call) { 134 call->flags |= IPC_CALL_NOTIF; 135 call->priv = ++events[evno].counter; 136 137 IPC_SET_IMETHOD(call->data, events[evno].imethod); 138 IPC_SET_ARG1(call->data, a1); 139 IPC_SET_ARG2(call->data, a2); 140 IPC_SET_ARG3(call->data, a3); 141 IPC_SET_ARG4(call->data, a4); 142 IPC_SET_ARG5(call->data, a5); 143 144 irq_spinlock_lock(&events[evno].answerbox->irq_lock, true); 145 list_append(&call->link, &events[evno].answerbox->irq_notifs); 146 irq_spinlock_unlock(&events[evno].answerbox->irq_lock, true); 147 148 waitq_wakeup(&events[evno].answerbox->wq, WAKEUP_FIRST); 149 150 if (mask) 151 events[evno].masked = true; 152 153 ret = EOK; 154 } else 155 ret = ENOMEM; 156 } else 157 ret = EBUSY; 158 } else 159 ret = ENOENT; 160 161 spinlock_unlock(&events[evno].lock); 162 163 return ret; 208 return event_enqueue(evno2event(evno, NULL), mask, a1, a2, a3, a4, a5); 209 } 210 211 /** Send per-task kernel notification event 212 * 213 * @param t Destination task. 214 * @param evno Event type. 215 * @param mask Mask further notifications after a successful 216 * sending. 217 * @param a1 First argument. 218 * @param a2 Second argument. 219 * @param a3 Third argument. 220 * @param a4 Fourth argument. 221 * @param a5 Fifth argument. 222 * 223 * @return EOK if notification was successfully sent. 224 * @return ENOMEM if the notification IPC message failed to allocate. 225 * @return EBUSY if the notifications of the given type are 226 * currently masked. 227 * @return ENOENT if the notifications of the given type are 228 * currently not subscribed. 229 * 230 */ 231 int event_task_notify(task_t *t, event_task_type_t evno, bool mask, sysarg_t a1, 232 sysarg_t a2, sysarg_t a3, sysarg_t a4, sysarg_t a5) 233 { 234 ASSERT(evno >= (int) EVENT_END); 235 ASSERT(evno < EVENT_TASK_END); 236 237 return event_enqueue(evno2event(evno, t), mask, a1, a2, a3, a4, a5); 164 238 } 165 239 … … 176 250 * 177 251 */ 178 static int event_subscribe(event_t ype_t evno, sysarg_t imethod,252 static int event_subscribe(event_t *event, sysarg_t imethod, 179 253 answerbox_t *answerbox) 180 254 { 181 ASSERT(evno < EVENT_END);182 183 spinlock_lock(&events[evno].lock);184 185 255 int res; 186 187 if (events[evno].answerbox == NULL) { 188 events[evno].answerbox = answerbox; 189 events[evno].imethod = imethod; 190 events[evno].counter = 0; 191 events[evno].masked = false; 256 257 spinlock_lock(&event->lock); 258 259 if (event->answerbox == NULL) { 260 event->answerbox = answerbox; 261 event->imethod = imethod; 262 event->counter = 0; 263 event->masked = false; 192 264 res = EOK; 193 265 } else 194 266 res = EEXISTS; 195 267 196 spinlock_unlock(&event s[evno].lock);268 spinlock_unlock(&event->lock); 197 269 198 270 return res; … … 204 276 * 205 277 */ 206 static void event_unmask(event_type_t evno) 207 { 208 ASSERT(evno < EVENT_END); 209 210 spinlock_lock(&events[evno].lock); 211 events[evno].masked = false; 212 event_callback_t callback = events[evno].unmask_callback; 213 spinlock_unlock(&events[evno].lock); 278 static void event_unmask(event_t *event) 279 { 280 spinlock_lock(&event->lock); 281 event->masked = false; 282 event_callback_t callback = event->unmask_callback; 283 spinlock_unlock(&event->lock); 214 284 215 285 /* … … 218 288 */ 219 289 if (callback != NULL) 220 callback( );290 callback(event); 221 291 } 222 292 … … 235 305 sysarg_t sys_event_subscribe(sysarg_t evno, sysarg_t imethod) 236 306 { 237 if (evno >= EVENT_ END)307 if (evno >= EVENT_TASK_END) 238 308 return ELIMIT; 239 309 240 return (sysarg_t) event_subscribe( (event_type_t) evno, (sysarg_t)241 imethod, &TASK->answerbox);310 return (sysarg_t) event_subscribe(evno2event(evno, TASK), 311 (sysarg_t) imethod, &TASK->answerbox); 242 312 } 243 313 … … 257 327 sysarg_t sys_event_unmask(sysarg_t evno) 258 328 { 259 if (evno >= EVENT_ END)329 if (evno >= EVENT_TASK_END) 260 330 return ELIMIT; 261 331 262 event_unmask((event_type_t) evno); 332 event_unmask(evno2event(evno, TASK)); 333 263 334 return EOK; 264 335 }
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