36 lines
1.1 KiB
C
36 lines
1.1 KiB
C
/*
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* Copyright (c) 2020 Institute of Parallel And Distributed Systems (IPADS), Shanghai Jiao Tong University (SJTU)
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* OS-Lab-2020 (i.e., ChCore) is licensed under the Mulan PSL v1.
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* You can use this software according to the terms and conditions of the Mulan PSL v1.
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* You may obtain a copy of Mulan PSL v1 at:
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* http://license.coscl.org.cn/MulanPSL
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* THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND, EITHER EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT, MERCHANTABILITY OR FIT FOR A PARTICULAR
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* PURPOSE.
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* See the Mulan PSL v1 for more details.
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*/
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#pragma once
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#include <common/types.h>
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struct lock {
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volatile u32 owner;
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char pad0[pad_to_cache_line(sizeof(u32))];
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volatile u32 next;
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char pad1[pad_to_cache_line(sizeof(u32))];
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} __attribute__ ((aligned(CACHELINE_SZ)));
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int lock_init(struct lock *lock);
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void lock(struct lock *lock);
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int try_lock(struct lock *lock);
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void unlock(struct lock *lock);
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int is_locked(struct lock *lock);
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/* Global locks */
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extern struct lock big_kernel_lock;
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void kernel_lock_init(void);
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void lock_kernel(void);
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void unlock_kernel(void);
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