70 lines
1020 B
C
70 lines
1020 B
C
/*
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* Copyright (c) 2006-2018, RT-Thread Development Team
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Change Logs:
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* Date Author Notes
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* 2010-10-26 Bernard the first version
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*/
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#include <pthread.h>
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int pthread_spin_init (pthread_spinlock_t *lock, int pshared)
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{
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if (!lock)
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return EINVAL;
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lock->lock = 0;
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return 0;
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}
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int pthread_spin_destroy (pthread_spinlock_t *lock)
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{
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if (!lock)
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return EINVAL;
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return 0;
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}
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int pthread_spin_lock (pthread_spinlock_t *lock)
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{
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if (!lock)
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return EINVAL;
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while (!(lock->lock))
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{
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lock->lock = 1;
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}
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return 0;
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}
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int pthread_spin_trylock (pthread_spinlock_t *lock)
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{
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if (!lock)
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return EINVAL;
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if (!(lock->lock))
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{
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lock->lock = 1;
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return 0;
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}
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return EBUSY;
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}
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int pthread_spin_unlock (pthread_spinlock_t *lock)
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{
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if (!lock)
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return EINVAL;
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if (!(lock->lock))
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return EPERM;
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lock->lock = 0;
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return 0;
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}
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