You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
62 lines
1.6 KiB
C
62 lines
1.6 KiB
C
/* See the end of this file for copyright and license terms. */
|
|
|
|
#pragma once
|
|
|
|
#include <gay/clist.h>
|
|
#include <gay/types.h>
|
|
|
|
struct task;
|
|
|
|
typedef struct {
|
|
atom_t lock; /* 0 = free, 1 = locked */
|
|
} spin_t;
|
|
|
|
#define SPIN_DEFINE { \
|
|
.lock = ATOM_DEFINE(0), \
|
|
}
|
|
|
|
#define SPIN(name) struct spin name = SPIN_DEFINE
|
|
|
|
void spin_init(spin_t *spin);
|
|
void spin_lock(spin_t *spin);
|
|
int spin_trylock(spin_t *spin);
|
|
void spin_unlock(spin_t *spin);
|
|
|
|
struct lock_waiter {
|
|
struct clist clink;
|
|
struct task *task;
|
|
};
|
|
|
|
struct mtx {
|
|
atom_t lock; /* 1 = free, 0 = locked, < 0 = locked and other threads are waiting */
|
|
spin_t wait_queue_lock;
|
|
struct clist wait_queue; /* -> struct lock_waiter::clink */
|
|
};
|
|
|
|
#define MTX_DEFINE(name) { \
|
|
.lock = ATOM_DEFINE(0), \
|
|
.wait_queue_lock = SPIN_DEFINE, \
|
|
.wait_queue = CLIST_DEFINE((name).wait_queue), \
|
|
}
|
|
|
|
#define MTX(name) struct mtx name = MTX_DEFINE(name)
|
|
|
|
void mtx_init(struct mtx *mutex);
|
|
void mtx_lock(struct mtx *mutex);
|
|
void mtx_unlock(struct mtx *mutex);
|
|
int mtx_trylock(struct mtx *mutex);
|
|
|
|
/*
|
|
* This file is part of GayBSD.
|
|
* Copyright (c) 2021 fef <owo@fef.moe>.
|
|
*
|
|
* GayBSD is nonviolent software: you may only use, redistribute, and/or
|
|
* modify it under the terms of the Cooperative Nonviolent Public License
|
|
* (CNPL) as found in the LICENSE file in the source code root directory
|
|
* or at <https://git.pixie.town/thufie/npl-builder>; either version 7
|
|
* of the license, or (at your option) any later version.
|
|
*
|
|
* GayBSD comes with ABSOLUTELY NO WARRANTY, to the extent
|
|
* permitted by applicable law. See the CNPL for details.
|
|
*/
|