85 lines
2.2 KiB
C++
85 lines
2.2 KiB
C++
/*
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* Copyright (c) 2011-2017, 2021 Jonas 'Sortie' Termansen.
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*
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* interrupt.cpp
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* High level interrupt services.
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*/
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#include <assert.h>
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#include <errno.h>
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#include <string.h>
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#include <sortix/kernel/interrupt.h>
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#include <sortix/kernel/kernel.h>
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#include <sortix/kernel/kthread.h>
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#include <sortix/kernel/thread.h>
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namespace Sortix {
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namespace Interrupt {
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Thread* interrupt_worker_thread = NULL;
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bool interrupt_worker_thread_boost = false;
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static struct interrupt_work* first;
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static struct interrupt_work* last;
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static bool interrupt_worker_idle = false;
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void WorkerThread(void* /*user*/)
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{
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Thread* thread = CurrentThread();
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assert(Interrupt::IsEnabled());
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while ( true )
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{
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thread->futex_woken = false;
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thread->timer_woken = false;
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struct interrupt_work* work;
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Interrupt::Disable();
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work = first;
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first = NULL;
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last = NULL;
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Interrupt::Enable();
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if ( !work )
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{
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interrupt_worker_idle = true;
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kthread_wait_futex();
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interrupt_worker_idle = false;
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continue;
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}
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while ( work )
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{
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struct interrupt_work* next_work = work->next;
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work->handler(work->context);
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work = next_work;
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}
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}
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}
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void ScheduleWork(struct interrupt_work* work)
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{
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assert(!Interrupt::IsEnabled());
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(last ? last->next : first) = work;
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work->next = NULL;
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last = work;
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interrupt_worker_thread_boost = true;
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if ( interrupt_worker_idle )
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{
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interrupt_worker_thread->futex_woken = true;
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kthread_wake_futex(interrupt_worker_thread);
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}
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}
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} // namespace Interrupt
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} // namespace Sortix
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