1 #include "pthread_impl.h" 2 #include <errno.h> 3 pthread_spin_lock(pthread_spinlock_t * s)4 int pthread_spin_lock(pthread_spinlock_t *s) 5 { 6 while (*(volatile int *)s || a_cas(s, 0, EBUSY)) a_spin(); 7 return 0; 8 } 9