52 lines
736 B
C
52 lines
736 B
C
#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) 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) 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) 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) 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) return EINVAL;
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if (!(lock->lock)) return EPERM;
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lock->lock = 0;
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return 0;
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}
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