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#include <pthread.h>
int pthread_spin_init (pthread_spinlock_t *lock, int pshared)
{
if (!lock) return EINVAL;
lock->lock = 0;
return 0;
}
int pthread_spin_destroy (pthread_spinlock_t *lock)
{
if (!lock) return EINVAL;
return 0;
}
int pthread_spin_lock (pthread_spinlock_t *lock)
{
if (!lock) return EINVAL;
while (!(lock->lock))
{
lock->lock = 1;
}
return 0;
}
int pthread_spin_trylock (pthread_spinlock_t *lock)
{
if (!lock) return EINVAL;
if (!(lock->lock))
{
lock->lock = 1;
return 0;
}
return EBUSY;
}
int pthread_spin_unlock (pthread_spinlock_t *lock)
{
if (!lock) return EINVAL;
if (!(lock->lock)) return EPERM;
lock->lock = 0;
return 0;
}
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