ngx_thread_cond_signal 250 src/core/ngx_thread_pool.c if (ngx_thread_cond_signal(&tp->cond, tp->log) != NGX_OK) { ngx_thread_cond_signal 32 src/os/unix/ngx_thread.h ngx_int_t ngx_thread_cond_signal(ngx_thread_cond_t *cond, ngx_log_t *log);