45 lines
920 B
C
45 lines
920 B
C
/* SPDX-License-Identifier: GPL-2.0+ */
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#ifndef _TOOLS__RWSEM_H
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#define _TOOLS__RWSEM_H
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#include <pthread.h>
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struct rw_semaphore {
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pthread_rwlock_t lock;
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};
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static inline int init_rwsem(struct rw_semaphore *sem)
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{
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return pthread_rwlock_init(&sem->lock, NULL);
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}
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static inline int exit_rwsem(struct rw_semaphore *sem)
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{
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return pthread_rwlock_destroy(&sem->lock);
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}
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static inline int down_read(struct rw_semaphore *sem)
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{
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return pthread_rwlock_rdlock(&sem->lock);
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}
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static inline int up_read(struct rw_semaphore *sem)
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{
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return pthread_rwlock_unlock(&sem->lock);
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}
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static inline int down_write(struct rw_semaphore *sem)
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{
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return pthread_rwlock_wrlock(&sem->lock);
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}
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static inline int up_write(struct rw_semaphore *sem)
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{
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return pthread_rwlock_unlock(&sem->lock);
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}
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#define down_read_nested(sem, subclass) down_read(sem)
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#define down_write_nested(sem, subclass) down_write(sem)
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#endif /* _TOOLS_RWSEM_H */
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