mirror of
https://gitee.com/anod/open_agb_firm.git
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136 lines
3.0 KiB
C
136 lines
3.0 KiB
C
/*
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* This file is part of open_agb_firm
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* Copyright (C) 2021 derrek, profi200
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <stdlib.h>
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#include "types.h"
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#include "internal/list.h"
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#include "arm11/drivers/interrupt.h"
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#include "internal/kernel_private.h"
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#include "internal/slabheap.h"
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#include "internal/config.h"
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typedef struct
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{
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bool signaled;
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const bool oneShot;
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ListNode waitQueue;
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} KEvent;
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static SlabHeap g_eventSlab = {0};
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static KHandle g_irqEventTable[128 - 32] = {0}; // 128 - 32 private interrupts.
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void signalEvent(KHandle const kevent, bool reschedule);
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void _eventSlabInit(void)
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{
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slabInit(&g_eventSlab, sizeof(KEvent), MAX_EVENTS);
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}
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static void eventIrqHandler(u32 intSource)
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{
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signalEvent(g_irqEventTable[intSource - 32], false);
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}
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KHandle createEvent(bool oneShot)
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{
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KEvent *const event = (KEvent*)slabAlloc(&g_eventSlab);
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event->signaled = false;
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*(bool*)&event->oneShot = oneShot;
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listInit(&event->waitQueue);
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return (KHandle)event;
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}
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void deleteEvent(KHandle const kevent)
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{
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KEvent *const event = (KEvent*)kevent;
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kernelLock();
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waitQueueWakeN(&event->waitQueue, (u32)-1, KRES_HANDLE_DELETED, true);
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slabFree(&g_eventSlab, event);
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}
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// TODO: Critical sections needed for bind/unbind?
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void bindInterruptToEvent(KHandle const kevent, uint8_t id, uint8_t prio)
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{
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if(id < 32 || id > 127) return;
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g_irqEventTable[id - 32] = kevent;
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IRQ_registerIsr(id, prio, 0, eventIrqHandler);
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}
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void unbindInterruptEvent(uint8_t id)
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{
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if(id < 32 || id > 127) return;
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g_irqEventTable[id - 32] = 0;
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IRQ_unregisterIsr(id);
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}
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// TODO: Timeout.
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KRes waitForEvent(KHandle const kevent)
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{
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KEvent *const event = (KEvent*)kevent;
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KRes res;
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kernelLock();
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if(event->signaled)
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{
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if(event->oneShot) event->signaled = false;
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kernelUnlock();
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res = KRES_OK;
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}
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else res = waitQueueBlock(&event->waitQueue);
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return res;
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}
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void signalEvent(KHandle const kevent, bool reschedule)
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{
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KEvent *const event = (KEvent*)kevent;
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kernelLock();
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if(!event->signaled)
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{
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if(event->oneShot)
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{
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if(!waitQueueWakeN(&event->waitQueue, 1, KRES_OK, reschedule))
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event->signaled = true;
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}
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else
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{
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event->signaled = true;
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waitQueueWakeN(&event->waitQueue, (u32)-1, KRES_OK, reschedule);
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}
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}
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else kernelUnlock();
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}
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void clearEvent(KHandle const kevent)
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{
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kernelLock(); // TODO: Can we do this without locks?
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((KEvent*)kevent)->signaled = false;
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kernelUnlock();
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}
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