ngx_spinlock      343 src/core/ngx_thread_pool.c         ngx_spinlock(&ngx_thread_pool_done_lock, 1, 2048);
ngx_spinlock      363 src/core/ngx_thread_pool.c     ngx_spinlock(&ngx_thread_pool_done_lock, 1, 2048);
ngx_spinlock      307 src/os/unix/ngx_atomic.h void ngx_spinlock(ngx_atomic_t *lock, ngx_atomic_int_t value, ngx_uint_t spin);