new file mode 100644
--- /dev/null
+++ b/src/os/unix/ngx_posix_cycle.c
@@ -0,0 +1,231 @@
+
+
+void ngx_posix_master_cycle(ngx_cycle_t *cycle)
+{
+    static ngx_int_t   sent;
+    static ngx_msec_t  delay = 125;
+
+    if (ngx_process == NGX_PROCESS_MASTER) {
+        if (sent) {
+            ngx_log_debug0(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
+                           "sent signal cycle");
+
+            if (sigprocmask(SIG_UNBLOCK, &set, NULL) == -1) {
+                ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
+                              "sigprocmask() failed");
+                continue;
+            }
+
+            /*
+             * there is very big chance that the pending signals
+             * would be delivered right on the sigprocmask() return
+             */
+
+            if (!ngx_signal) {
+
+                if (delay < 15000) {
+                    delay *= 2;
+                }
+
+                ngx_log_debug1(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
+                               "msleep %d", delay);
+
+                ngx_msleep(delay);
+
+                ngx_gettimeofday(&tv);
+                ngx_time_update(tv.tv_sec);
+
+                ngx_log_debug0(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
+                               "wake up");
+            }
+
+            if (sigprocmask(SIG_BLOCK, &set, NULL) == -1) {
+                ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
+                              "sigprocmask() failed");
+            }
+
+            ngx_signal = 0;
+
+        } else {
+            ngx_log_debug0(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
+                           "sigsuspend");
+
+            sigsuspend(&wset);
+
+            ngx_gettimeofday(&tv);
+            ngx_time_update(tv.tv_sec);
+
+            ngx_log_debug0(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
+                           "wake up");
+        }
+
+    } else { /* NGX_PROCESS_SINGLE */
+        ngx_log_debug0(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
+                       "worker cycle");
+
+        ngx_process_events(cycle->log);
+    }
+
+    if (ngx_reap) {
+        ngx_log_debug0(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
+                       "reap childs");
+
+        live = 0;
+        for (i = 0; i < ngx_last_process; i++) {
+
+            ngx_log_debug6(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
+                           "child: " PID_T_FMT
+                           " s:%d e:%d t:%d d:%d r:%d",
+                           ngx_processes[i].pid,
+                           ngx_processes[i].signal,
+                           ngx_processes[i].exiting,
+                           ngx_processes[i].exited,
+                           ngx_processes[i].detached,
+                           ngx_processes[i].respawn);
+
+            if (ngx_processes[i].exited) {
+
+                if (ngx_processes[i].respawn
+                    && !ngx_processes[i].exiting
+                    && !ngx_terminate
+                    && !ngx_quit)
+                {
+                     if (ngx_spawn_process(cycle,
+                                           ngx_processes[i].proc,
+                                           ngx_processes[i].data,
+                                           ngx_processes[i].name, i)
+                                                                  == NGX_ERROR)
+                     {
+                         ngx_log_error(NGX_LOG_ALERT, cycle->log, 0,
+                                       "can not respawn %s",
+                                       ngx_processes[i].name);
+                     }
+
+                     continue;
+                }
+
+                if (ngx_processes[i].pid == ngx_new_binary) {
+                    ngx_new_binary = 0;
+                }
+
+                if (i != --ngx_last_process) {
+                    ngx_processes[i--] =
+                                               ngx_processes[ngx_last_process];
+                }
+
+            } else if (!ngx_processes[i].detached
+                       && (ngx_terminate || ngx_quit))
+            {
+                live = 1;
+
+            } else if (ngx_processes[i].exiting) {
+                live = 1;
+            }
+        }
+
+        if (!live) {
+            if (ngx_terminate || ngx_quit) {
+
+                if (ngx_inherited && getppid() > 1) {
+                    name = ctx->pid.name.data;
+
+                } else {
+                    name = ctx->name;
+                }
+
+                if (ngx_delete_file(name) == NGX_FILE_ERROR) {
+                    ngx_log_error(NGX_LOG_ALERT, cycle->log,
+                                  ngx_errno,
+                                  ngx_delete_file_n
+                                  " \"%s\" failed", name);
+                }
+
+                ngx_log_error(NGX_LOG_INFO, cycle->log, 0, "exit");
+                exit(0);
+
+            } else {
+                sent = 0;
+            }
+        }
+    }
+
+    if (ngx_terminate) {
+        if (delay > 10000) {
+            signo = SIGKILL;
+        } else {
+            signo = ngx_signal_value(NGX_TERMINATE_SIGNAL);
+        }
+
+    } else if (ngx_quit) {
+        signo = ngx_signal_value(NGX_SHUTDOWN_SIGNAL);
+
+    } else {
+
+        if (ngx_noaccept) {
+            signo = ngx_signal_value(NGX_SHUTDOWN_SIGNAL);
+        }
+
+        if (ngx_change_binary) {
+            ngx_change_binary = 0;
+            ngx_log_error(NGX_LOG_INFO, cycle->log, 0, "changing binary");
+            ngx_new_binary = ngx_exec_new_binary(cycle, ctx->argv);
+        }
+
+        if (ngx_reconfigure) {
+            signo = ngx_signal_value(NGX_SHUTDOWN_SIGNAL);
+            ngx_log_error(NGX_LOG_INFO, cycle->log, 0, "reconfiguring");
+        }
+
+        if (ngx_reopen) {
+            /* STUB */
+            signo = ngx_signal_value(NGX_SHUTDOWN_SIGNAL);
+
+            ngx_log_error(NGX_LOG_INFO, cycle->log, 0, "reopening logs");
+            ngx_reopen_files(cycle);
+        }
+    }
+
+    if (signo) {
+        for (i = 0; i < ngx_last_process; i++) {
+
+            if (!ngx_processes[i].detached) {
+                ngx_processes[i].signal = signo;
+
+                ngx_log_debug2(NGX_LOG_DEBUG_EVENT,
+                               cycle->log, 0,
+                               "signal " PID_T_FMT " %d",
+                               ngx_processes[i].pid, signo);
+            }
+        }
+
+        delay = 125;
+        signo = 0;
+    }
+
+    for (i = 0; i < ngx_last_process; i++) {
+
+        if (ngx_processes[i].signal == 0) {
+            continue;
+        }
+
+        if (ccf->kqueue_signal != 1) {
+            sent = 1;
+        }
+
+        ngx_log_debug2(NGX_LOG_DEBUG_CORE, cycle->log, 0,
+                       "kill (" PID_T_FMT ", %d)" ,
+                       ngx_processes[i].pid,
+                       ngx_processes[i].signal);
+
+        if (kill(ngx_processes[i].pid, ngx_processes[i].signal) == -1) {
+            ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
+                          "kill(%d, %d) failed",
+                          ngx_processes[i].pid, ngx_processes[i].signal);
+            continue;
+        }
+
+        if (ngx_processes[i].signal != ngx_signal_value(NGX_REOPEN_SIGNAL)) {
+            ngx_processes[i].exiting = 1;
+        }
+    }
+}