| 0,0 → 1,153 |
|---|
| /* |
| * Copyright (c) 2009 Jakub Jermar |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * - Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * - Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * - The name of the author may not be used to endorse or promote products |
| * derived from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| /** @addtogroup generic |
| * @{ |
| */ |
| /** |
| * @file |
| * @brief Kernel event notifications. |
| */ |
| |
| #include <event/event.h> |
| #include <event/event_types.h> |
| #include <mm/slab.h> |
| #include <arch/types.h> |
| #include <synch/spinlock.h> |
| #include <console/console.h> |
| #include <memstr.h> |
| #include <errno.h> |
| #include <arch.h> |
| |
| /** |
| * The events array. |
| * Arranging the events in this two-dimensional array should decrease the |
| * likelyhood of cacheline ping-pong. |
| */ |
| static event_t *events[EVENT_END]; |
| |
| /** Initialize kernel events. */ |
| void event_init(void) |
| { |
| int i; |
| |
| for (i = 0; i < EVENT_END; i++) { |
| events[i] = (event_t *) malloc(sizeof(event_t), 0); |
| spinlock_initialize(&events[i]->lock, "event.lock"); |
| events[i]->answerbox = NULL; |
| events[i]->counter = 0; |
| events[i]->method = 0; |
| } |
| } |
| |
| static int |
| event_subscribe(event_type_t e, unative_t method, answerbox_t *answerbox) |
| { |
| if (e >= EVENT_END) |
| return ELIMIT; |
| |
| int res = EEXISTS; |
| event_t *event = events[e]; |
| |
| spinlock_lock(&event->lock); |
| if (!event->answerbox) { |
| event->answerbox = answerbox; |
| event->method = method; |
| event->counter = 0; |
| res = EOK; |
| } |
| spinlock_unlock(&event->lock); |
| |
| return res; |
| } |
| |
| unative_t sys_event_subscribe(unative_t evno, unative_t method) |
| { |
| return (unative_t) event_subscribe((event_type_t) evno, (unative_t) |
| method, &TASK->answerbox); |
| } |
| |
| bool event_is_subscribed(event_type_t e) |
| { |
| bool res; |
| |
| ASSERT(e < EVENT_END); |
| spinlock_lock(&events[e]->lock); |
| res = events[e]->answerbox != NULL; |
| spinlock_unlock(&events[e]->lock); |
| |
| return res; |
| } |
| |
| |
| void event_cleanup_answerbox(answerbox_t *answerbox) |
| { |
| int i; |
| |
| for (i = 0; i < EVENT_END; i++) { |
| spinlock_lock(&events[i]->lock); |
| if (events[i]->answerbox == answerbox) { |
| events[i]->answerbox = NULL; |
| events[i]->counter = 0; |
| events[i]->method = 0; |
| } |
| spinlock_unlock(&events[i]->lock); |
| } |
| } |
| |
| void |
| event_notify(event_type_t e, unative_t a1, unative_t a2, unative_t a3, |
| unative_t a4, unative_t a5) |
| { |
| ASSERT(e < EVENT_END); |
| event_t *event = events[e]; |
| spinlock_lock(&event->lock); |
| if (event->answerbox) { |
| call_t *call = ipc_call_alloc(FRAME_ATOMIC); |
| if (call) { |
| call->flags |= IPC_CALL_NOTIF; |
| call->priv = ++event->counter; |
| IPC_SET_METHOD(call->data, event->method); |
| IPC_SET_ARG1(call->data, a1); |
| IPC_SET_ARG2(call->data, a2); |
| IPC_SET_ARG3(call->data, a3); |
| IPC_SET_ARG4(call->data, a4); |
| IPC_SET_ARG5(call->data, a5); |
| |
| spinlock_lock(&event->answerbox->irq_lock); |
| list_append(&call->link, &event->answerbox->irq_notifs); |
| spinlock_unlock(&event->answerbox->irq_lock); |
| |
| waitq_wakeup(&event->answerbox->wq, WAKEUP_FIRST); |
| } |
| } |
| spinlock_unlock(&event->lock); |
| } |
| |
| /** @} |
| */ |