89 lines
1.6 KiB
C
89 lines
1.6 KiB
C
/*
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* Copyright (c) 2017, Linaro Limited. and Contributors. All rights reserved.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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/*
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* @file zephyr/mutex.h
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* @brief Zephyr mutex primitives for libmetal.
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*/
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#ifndef __METAL_MUTEX__H__
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#error "Include metal/mutex.h instead of metal/zephyr/mutex.h"
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#endif
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#ifndef __METAL_ZEPHYR_MUTEX__H__
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#define __METAL_ZEPHYR_MUTEX__H__
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#include <metal/atomic.h>
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#include <kernel.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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typedef struct k_sem metal_mutex_t;
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/*
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* METAL_MUTEX_INIT - used for initializing an mutex elmenet in a static struct
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* or global
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*/
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#define METAL_MUTEX_INIT(m) _K_SEM_INITIALIZER(m, 1, 1)
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/*
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* METAL_MUTEX_DEFINE - used for defining and initializing a global or
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* static singleton mutex
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*/
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#define METAL_MUTEX_DEFINE(m) K_SEM_DEFINE(m, 1, 1)
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static inline void __metal_mutex_init(metal_mutex_t *m)
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{
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k_sem_init(m, 1, 1);
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}
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static inline void __metal_mutex_deinit(metal_mutex_t *m)
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{
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(void)m;
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}
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static inline int __metal_mutex_try_acquire(metal_mutex_t *m)
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{
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int key = irq_lock(), ret = 1;
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if (m->count) {
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m->count = 0;
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ret = 0;
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}
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irq_unlock(key);
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return ret;
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}
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static inline int __metal_mutex_is_acquired(metal_mutex_t *m)
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{
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int key = irq_lock(), ret;
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ret = m->count;
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irq_unlock(key);
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return ret;
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}
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static inline void __metal_mutex_acquire(metal_mutex_t *m)
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{
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k_sem_take(m, K_FOREVER);
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}
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static inline void __metal_mutex_release(metal_mutex_t *m)
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{
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k_sem_give(m);
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}
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#ifdef __cplusplus
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}
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#endif
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#endif /* __METAL_ZEPHYR_MUTEX__H__ */
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