spin               12 core/ngx_spinlock.c ngx_spinlock(ngx_atomic_t *lock, ngx_atomic_int_t value, ngx_uint_t spin)
spin               27 core/ngx_spinlock.c             for (n = 1; n < spin; n <<= 1) {
spin              304 os/unix/ngx_atomic.h void ngx_spinlock(ngx_atomic_t *lock, ngx_atomic_int_t value, ngx_uint_t spin);