ngx_mutex_dolock  112 os/unix/ngx_freebsd_rfork_thread.h #define ngx_mutex_trylock(m)  ngx_mutex_dolock(m, 1)
ngx_mutex_dolock  113 os/unix/ngx_freebsd_rfork_thread.h #define ngx_mutex_lock(m)     (void) ngx_mutex_dolock(m, 0)
ngx_mutex_dolock  114 os/unix/ngx_freebsd_rfork_thread.h ngx_int_t ngx_mutex_dolock(ngx_mutex_t *m, ngx_int_t try);