ngx_spinlock       36 core/ngx_shmtx.h #define ngx_shmtx_lock(mtx)   ngx_spinlock((mtx)->lock, ngx_pid, 1024)
ngx_spinlock      304 os/unix/ngx_atomic.h void ngx_spinlock(ngx_atomic_t *lock, ngx_atomic_int_t value, ngx_uint_t spin);