ngx_mutex_lock    113 os/unix/ngx_freebsd_rfork_thread.h #define ngx_mutex_lock(m)     (void) ngx_mutex_dolock(m, 0)
ngx_mutex_lock    117 os/unix/ngx_pthread_thread.c ngx_mutex_lock(ngx_mutex_t *m)
ngx_mutex_lock    117 os/unix/ngx_thread.h #define ngx_mutex_lock(m)