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62 lines
1.5 KiB
C
62 lines
1.5 KiB
C
/* See the end of this file for copyright and license terms. */
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#pragma once
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#include <gay/clist.h>
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#include <gay/types.h>
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struct task;
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typedef struct {
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atom_t lock;
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} spin_t;
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#define SPIN_DEFINE { \
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.lock = ATOM_DEFINE(0), \
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}
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#define SPIN(name) struct spin name = SPIN_DEFINE
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void spin_init(spin_t *spin);
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void spin_lock(spin_t *spin);
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int spin_trylock(spin_t *spin);
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void spin_unlock(spin_t *spin);
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struct lock_waiter {
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struct clist clink;
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struct task *task;
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};
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struct mtx {
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atom_t lock;
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spin_t wait_queue_lock;
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struct clist wait_queue; /* -> struct lock_waiter::clink */
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};
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#define MTX_DEFINE(name) { \
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.lock = ATOM_DEFINE(0), \
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.wait_queue_lock = SPIN_DEFINE, \
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.wait_queue = CLIST_DEFINE((name).wait_queue), \
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}
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#define MTX(name) struct mtx name = MTX_DEFINE(name)
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void mtx_init(struct mtx *mutex);
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void mtx_lock(struct mtx *mutex);
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void mtx_unlock(struct mtx *mutex);
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int mtx_trylock(struct mtx *mutex);
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/*
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* This file is part of GayBSD.
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* Copyright (c) 2021 fef <owo@fef.moe>.
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*
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* GayBSD is nonviolent software: you may only use, redistribute, and/or
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* modify it under the terms of the Cooperative Nonviolent Public License
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* (CNPL) as found in the LICENSE file in the source code root directory
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* or at <https://git.pixie.town/thufie/npl-builder>; either version 7
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* of the license, or (at your option) any later version.
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*
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* GayBSD comes with ABSOLUTELY NO WARRANTY, to the extent
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* permitted by applicable law. See the CNPL for details.
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*/
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