Mercurial > hg > nginx-vendor-current
diff src/os/unix/ngx_process_cycle.c @ 0:f0b350454894 NGINX_0_1_0
nginx 0.1.0
*) The first public version.
author | Igor Sysoev <http://sysoev.ru> |
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date | Mon, 04 Oct 2004 00:00:00 +0400 |
parents | |
children | cc9f381affaa |
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new file mode 100644 --- /dev/null +++ b/src/os/unix/ngx_process_cycle.c @@ -0,0 +1,970 @@ + +/* + * Copyright (C) Igor Sysoev + */ + + +#include <ngx_config.h> +#include <ngx_core.h> +#include <ngx_event.h> +#include <ngx_channel.h> + + +static void ngx_start_worker_processes(ngx_cycle_t *cycle, ngx_int_t n, + ngx_int_t type); +static void ngx_signal_worker_processes(ngx_cycle_t *cycle, int signo); +static ngx_uint_t ngx_reap_childs(ngx_cycle_t *cycle); +static void ngx_master_exit(ngx_cycle_t *cycle, ngx_master_ctx_t *ctx); +static void ngx_worker_process_cycle(ngx_cycle_t *cycle, void *data); +static void ngx_channel_handler(ngx_event_t *ev); +#if (NGX_THREADS) +static void ngx_wakeup_worker_threads(ngx_cycle_t *cycle); +static void *ngx_worker_thread_cycle(void *data); +#endif + + +ngx_uint_t ngx_process; +ngx_pid_t ngx_pid; +ngx_uint_t ngx_threaded; + +sig_atomic_t ngx_reap; +sig_atomic_t ngx_timer; +sig_atomic_t ngx_sigio; +sig_atomic_t ngx_terminate; +sig_atomic_t ngx_quit; +ngx_uint_t ngx_exiting; +sig_atomic_t ngx_reconfigure; +sig_atomic_t ngx_reopen; + +sig_atomic_t ngx_change_binary; +ngx_pid_t ngx_new_binary; +ngx_uint_t ngx_inherited; +ngx_uint_t ngx_daemonized; + +sig_atomic_t ngx_noaccept; +ngx_uint_t ngx_noaccepting; +ngx_uint_t ngx_restart; + + +#if (NGX_THREADS) +volatile ngx_thread_t ngx_threads[NGX_MAX_THREADS]; +ngx_int_t ngx_threads_n; +#endif + + +u_char master_process[] = "master process"; + + +void ngx_master_process_cycle(ngx_cycle_t *cycle, ngx_master_ctx_t *ctx) +{ + char *title; + u_char *p; + size_t size; + ngx_int_t i; + sigset_t set; + struct timeval tv; + struct itimerval itv; + ngx_uint_t live; + ngx_msec_t delay; + ngx_core_conf_t *ccf; + + sigemptyset(&set); + sigaddset(&set, SIGCHLD); + sigaddset(&set, SIGALRM); + sigaddset(&set, SIGIO); + sigaddset(&set, SIGINT); + sigaddset(&set, ngx_signal_value(NGX_RECONFIGURE_SIGNAL)); + sigaddset(&set, ngx_signal_value(NGX_REOPEN_SIGNAL)); + sigaddset(&set, ngx_signal_value(NGX_NOACCEPT_SIGNAL)); + sigaddset(&set, ngx_signal_value(NGX_TERMINATE_SIGNAL)); + sigaddset(&set, ngx_signal_value(NGX_SHUTDOWN_SIGNAL)); + sigaddset(&set, ngx_signal_value(NGX_CHANGEBIN_SIGNAL)); + + if (sigprocmask(SIG_BLOCK, &set, NULL) == -1) { + ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno, + "sigprocmask() failed"); + } + + sigemptyset(&set); + + + size = sizeof(master_process); + + for (i = 0; i < ctx->argc; i++) { + size += ngx_strlen(ctx->argv[i]) + 1; + } + + title = ngx_palloc(cycle->pool, size); + + p = ngx_cpymem(title, master_process, sizeof(master_process) - 1); + for (i = 0; i < ctx->argc; i++) { + *p++ = ' '; + p = ngx_cpystrn(p, (u_char *) ctx->argv[i], size); + } + + ngx_setproctitle(title); + + + ccf = (ngx_core_conf_t *) ngx_get_conf(cycle->conf_ctx, ngx_core_module); + + ngx_start_worker_processes(cycle, ccf->worker_processes, + NGX_PROCESS_RESPAWN); + + ngx_new_binary = 0; + delay = 0; + live = 1; + + for ( ;; ) { + if (delay) { + delay *= 2; + + ngx_log_debug1(NGX_LOG_DEBUG_EVENT, cycle->log, 0, + "temination cycle: %d", delay); + + itv.it_interval.tv_sec = 0; + itv.it_interval.tv_usec = 0; + itv.it_value.tv_sec = delay / 1000; + itv.it_value.tv_usec = (delay % 1000 ) * 1000; + + if (setitimer(ITIMER_REAL, &itv, NULL) == -1) { + ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno, + "setitimer() failed"); + } + } + + ngx_log_debug0(NGX_LOG_DEBUG_EVENT, cycle->log, 0, "sigsuspend"); + + sigsuspend(&set); + + ngx_gettimeofday(&tv); + ngx_time_update(tv.tv_sec); + + ngx_log_debug0(NGX_LOG_DEBUG_EVENT, cycle->log, 0, "wake up"); + + if (ngx_reap) { + ngx_reap = 0; + ngx_log_debug0(NGX_LOG_DEBUG_EVENT, cycle->log, 0, "reap childs"); + + live = ngx_reap_childs(cycle); + } + + if (!live && (ngx_terminate || ngx_quit)) { + ngx_master_exit(cycle, ctx); + } + + if (ngx_terminate) { + if (delay == 0) { + delay = 50; + } + + if (delay > 1000) { + ngx_signal_worker_processes(cycle, SIGKILL); + } else { + ngx_signal_worker_processes(cycle, + ngx_signal_value(NGX_TERMINATE_SIGNAL)); + } + + continue; + } + + if (ngx_quit) { + ngx_signal_worker_processes(cycle, + ngx_signal_value(NGX_SHUTDOWN_SIGNAL)); + continue; + } + + if (ngx_timer) { + ngx_timer = 0; + ngx_start_worker_processes(cycle, ccf->worker_processes, + NGX_PROCESS_JUST_RESPAWN); + live = 1; + ngx_signal_worker_processes(cycle, + ngx_signal_value(NGX_SHUTDOWN_SIGNAL)); + } + + if (ngx_reconfigure) { + ngx_reconfigure = 0; + + if (ngx_new_binary) { + ngx_log_error(NGX_LOG_INFO, cycle->log, 0, "start new workers"); + + ngx_start_worker_processes(cycle, ccf->worker_processes, + NGX_PROCESS_RESPAWN); + ngx_noaccepting = 0; + + continue; + } + + ngx_log_error(NGX_LOG_INFO, cycle->log, 0, "reconfiguring"); + + cycle = ngx_init_cycle(cycle); + if (cycle == NULL) { + cycle = (ngx_cycle_t *) ngx_cycle; + continue; + } + + ngx_cycle = cycle; + ccf = (ngx_core_conf_t *) ngx_get_conf(cycle->conf_ctx, + ngx_core_module); + ngx_start_worker_processes(cycle, ccf->worker_processes, + NGX_PROCESS_JUST_RESPAWN); + live = 1; + ngx_signal_worker_processes(cycle, + ngx_signal_value(NGX_SHUTDOWN_SIGNAL)); + } + + if (ngx_restart) { + ngx_restart = 0; + ngx_start_worker_processes(cycle, ccf->worker_processes, + NGX_PROCESS_RESPAWN); + live = 1; + } + + if (ngx_reopen) { + ngx_reopen = 0; + ngx_log_error(NGX_LOG_INFO, cycle->log, 0, "reopening logs"); + ngx_reopen_files(cycle, ccf->user); + ngx_signal_worker_processes(cycle, + ngx_signal_value(NGX_REOPEN_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_noaccept) { + ngx_noaccept = 0; + ngx_noaccepting = 1; + ngx_signal_worker_processes(cycle, + ngx_signal_value(NGX_SHUTDOWN_SIGNAL)); + } + } +} + + +void ngx_single_process_cycle(ngx_cycle_t *cycle, ngx_master_ctx_t *ctx) +{ + ngx_uint_t i; + +#if 0 + ngx_setproctitle("single worker process"); +#endif + + ngx_init_temp_number(); + + for (i = 0; ngx_modules[i]; i++) { + if (ngx_modules[i]->init_process) { + if (ngx_modules[i]->init_process(cycle) == NGX_ERROR) { + /* fatal */ + exit(2); + } + } + } + + for ( ;; ) { + ngx_log_debug0(NGX_LOG_DEBUG_EVENT, cycle->log, 0, "worker cycle"); + + ngx_process_events(cycle); + + if (ngx_terminate || ngx_quit) { + ngx_master_exit(cycle, ctx); + } + + if (ngx_reconfigure) { + ngx_reconfigure = 0; + ngx_log_error(NGX_LOG_INFO, cycle->log, 0, "reconfiguring"); + + cycle = ngx_init_cycle(cycle); + if (cycle == NULL) { + cycle = (ngx_cycle_t *) ngx_cycle; + continue; + } + + ngx_cycle = cycle; + } + + if (ngx_reopen) { + ngx_reopen = 0; + ngx_log_error(NGX_LOG_INFO, cycle->log, 0, "reopening logs"); + ngx_reopen_files(cycle, (ngx_uid_t) -1); + } + } +} + + +static void ngx_start_worker_processes(ngx_cycle_t *cycle, ngx_int_t n, + ngx_int_t type) +{ + ngx_int_t i; + ngx_channel_t ch; + struct itimerval itv; + + ngx_log_error(NGX_LOG_INFO, cycle->log, 0, "start worker processes"); + + ch.command = NGX_CMD_OPEN_CHANNEL; + + while (n--) { + ngx_spawn_process(cycle, ngx_worker_process_cycle, NULL, + "worker process", type); + + ch.pid = ngx_processes[ngx_process_slot].pid; + ch.slot = ngx_process_slot; + ch.fd = ngx_processes[ngx_process_slot].channel[0]; + + for (i = 0; i < ngx_last_process; i++) { + + if (i == ngx_process_slot + || ngx_processes[i].pid == -1 + || ngx_processes[i].channel[0] == -1) + { + continue; + } + + ngx_log_debug6(NGX_LOG_DEBUG_CORE, cycle->log, 0, + "pass channel s:%d pid:" PID_T_FMT + " fd:%d to s:%d pid:" PID_T_FMT " fd:%d", + ch.slot, ch.pid, ch.fd, + i, ngx_processes[i].pid, + ngx_processes[i].channel[0]); + + /* TODO: NGX_AGAIN */ + + ngx_write_channel(ngx_processes[i].channel[0], + &ch, sizeof(ngx_channel_t), cycle->log); + } + } + + /* + * we have to limit the maximum life time of the worker processes + * by 10 days because our millisecond event timer is limited + * by 24 days on 32-bit platforms + */ + + itv.it_interval.tv_sec = 0; + itv.it_interval.tv_usec = 0; + itv.it_value.tv_sec = 10 * 24 * 60 * 60; + itv.it_value.tv_usec = 0; + + if (setitimer(ITIMER_REAL, &itv, NULL) == -1) { + ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno, + "setitimer() failed"); + } +} + + +static void ngx_signal_worker_processes(ngx_cycle_t *cycle, int signo) +{ + ngx_int_t i; + ngx_err_t err; + ngx_channel_t ch; + + + switch (signo) { + + case ngx_signal_value(NGX_SHUTDOWN_SIGNAL): + ch.command = NGX_CMD_QUIT; + break; + + case ngx_signal_value(NGX_TERMINATE_SIGNAL): + ch.command = NGX_CMD_TERMINATE; + break; + + case ngx_signal_value(NGX_REOPEN_SIGNAL): + ch.command = NGX_CMD_REOPEN; + break; + + default: + ch.command = 0; + } + + ch.fd = -1; + + + for (i = 0; i < ngx_last_process; i++) { + + ngx_log_debug7(NGX_LOG_DEBUG_EVENT, cycle->log, 0, + "child: %d " PID_T_FMT " e:%d t:%d d:%d r:%d j:%d", + i, + ngx_processes[i].pid, + ngx_processes[i].exiting, + ngx_processes[i].exited, + ngx_processes[i].detached, + ngx_processes[i].respawn, + ngx_processes[i].just_respawn); + + if (ngx_processes[i].detached || ngx_processes[i].pid == -1) { + continue; + } + + if (ngx_processes[i].just_respawn) { + ngx_processes[i].just_respawn = 0; + continue; + } + + if (ngx_processes[i].exiting + && signo == ngx_signal_value(NGX_SHUTDOWN_SIGNAL)) + { + continue; + } + + if (ch.command) { + if (ngx_write_channel(ngx_processes[i].channel[0], + &ch, sizeof(ngx_channel_t), cycle->log) == NGX_OK) + { + if (signo != ngx_signal_value(NGX_REOPEN_SIGNAL)) { + ngx_processes[i].exiting = 1; + } + + continue; + } + } + + ngx_log_debug2(NGX_LOG_DEBUG_CORE, cycle->log, 0, + "kill (" PID_T_FMT ", %d)" , + ngx_processes[i].pid, signo); + + if (kill(ngx_processes[i].pid, signo) == -1) { + err = ngx_errno; + ngx_log_error(NGX_LOG_ALERT, cycle->log, err, + "kill(%d, %d) failed", + ngx_processes[i].pid, signo); + + if (err == NGX_ESRCH) { + ngx_processes[i].exited = 1; + ngx_processes[i].exiting = 0; + ngx_reap = 1; + } + + continue; + } + + if (signo != ngx_signal_value(NGX_REOPEN_SIGNAL)) { + ngx_processes[i].exiting = 1; + } + } +} + + +static ngx_uint_t ngx_reap_childs(ngx_cycle_t *cycle) +{ + ngx_int_t i, n; + ngx_uint_t live; + ngx_channel_t ch; + + ch.command = NGX_CMD_CLOSE_CHANNEL; + ch.fd = -1; + + live = 0; + for (i = 0; i < ngx_last_process; i++) { + + ngx_log_debug7(NGX_LOG_DEBUG_EVENT, cycle->log, 0, + "child: %d " PID_T_FMT " e:%d t:%d d:%d r:%d j:%d", + i, + ngx_processes[i].pid, + ngx_processes[i].exiting, + ngx_processes[i].exited, + ngx_processes[i].detached, + ngx_processes[i].respawn, + ngx_processes[i].just_respawn); + + if (ngx_processes[i].pid == -1) { + continue; + } + + if (ngx_processes[i].exited) { + + if (!ngx_processes[i].detached) { + ngx_close_channel(ngx_processes[i].channel, cycle->log); + + ngx_processes[i].channel[0] = -1; + ngx_processes[i].channel[1] = -1; + + ch.pid = ngx_processes[i].pid; + ch.slot = i; + + for (n = 0; n < ngx_last_process; n++) { + if (ngx_processes[n].exited + || ngx_processes[n].pid == -1 + || ngx_processes[n].channel[0] == -1) + { + continue; + } + + ngx_log_debug3(NGX_LOG_DEBUG_CORE, cycle->log, 0, + "pass close channel s:%d pid:" PID_T_FMT + " to:" PID_T_FMT, ch.slot, ch.pid, ngx_processes[n].pid); + + /* TODO: NGX_AGAIN */ + + ngx_write_channel(ngx_processes[n].channel[0], + &ch, sizeof(ngx_channel_t), cycle->log); + } + } + + 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; + } + + live = 1; + + continue; + } + + if (ngx_processes[i].pid == ngx_new_binary) { + ngx_new_binary = 0; + if (ngx_noaccepting) { + ngx_restart = 1; + ngx_noaccepting = 0; + } + } + + if (i == ngx_last_process - 1) { + ngx_last_process--; + + } else { + ngx_processes[i].pid = -1; + } + + } else if (ngx_processes[i].exiting || !ngx_processes[i].detached) { + live = 1; + } + } + + return live; +} + + +static void ngx_master_exit(ngx_cycle_t *cycle, ngx_master_ctx_t *ctx) +{ + ngx_delete_pidfile(cycle); + + ngx_log_error(NGX_LOG_INFO, cycle->log, 0, "exit"); + + ngx_destroy_pool(cycle->pool); + + exit(0); +} + + +static void ngx_worker_process_cycle(ngx_cycle_t *cycle, void *data) +{ + sigset_t set; + ngx_err_t err; + ngx_int_t n; + ngx_uint_t i; + struct timeval tv; + ngx_listening_t *ls; + ngx_core_conf_t *ccf; + ngx_connection_t *c; + + + ngx_gettimeofday(&tv); + + ngx_start_msec = (ngx_epoch_msec_t) tv.tv_sec * 1000 + tv.tv_usec / 1000; + ngx_old_elapsed_msec = 0; + ngx_elapsed_msec = 0; + + + ngx_process = NGX_PROCESS_WORKER; + + ccf = (ngx_core_conf_t *) ngx_get_conf(cycle->conf_ctx, ngx_core_module); + + if (ccf->group != (gid_t) NGX_CONF_UNSET) { + if (setgid(ccf->group) == -1) { + ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno, + "setgid(%d) failed", ccf->group); + /* fatal */ + exit(2); + } + } + + if (ccf->user != (uid_t) NGX_CONF_UNSET) { + if (setuid(ccf->user) == -1) { + ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno, + "setuid(%d) failed", ccf->user); + /* fatal */ + exit(2); + } + } + +#if (HAVE_PR_SET_DUMPABLE) + + /* allow coredump after setuid() in Linux 2.4.x */ + + if (prctl(PR_SET_DUMPABLE, 1, 0, 0, 0) == -1) { + ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno, + "prctl(PR_SET_DUMPABLE) failed"); + } + +#endif + + sigemptyset(&set); + + if (sigprocmask(SIG_SETMASK, &set, NULL) == -1) { + ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno, + "sigprocmask() failed"); + } + + ngx_init_temp_number(); + + /* + * disable deleting previous events for the listening sockets because + * in the worker processes there are no events at all at this point + */ + ls = cycle->listening.elts; + for (i = 0; i < cycle->listening.nelts; i++) { + ls[i].remain = 0; + } + + for (i = 0; ngx_modules[i]; i++) { + if (ngx_modules[i]->init_process) { + if (ngx_modules[i]->init_process(cycle) == NGX_ERROR) { + /* fatal */ + exit(2); + } + } + } + + for (n = 0; n < ngx_last_process; n++) { + + if (ngx_processes[n].pid == -1) { + continue; + } + + if (n == ngx_process_slot) { + continue; + } + + if (ngx_processes[n].channel[1] == -1) { + continue; + } + + if (close(ngx_processes[n].channel[1]) == -1) { + ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno, + "close() failed"); + } + } + + if (close(ngx_processes[ngx_process_slot].channel[0]) == -1) { + ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno, + "close() failed"); + } + +#if 0 + ngx_last_process = 0; +#endif + + if (ngx_add_channel_event(cycle, ngx_channel, NGX_READ_EVENT, + ngx_channel_handler) == NGX_ERROR) + { + /* fatal */ + exit(2); + } + + ngx_setproctitle("worker process"); + +#if (NGX_THREADS) + + if (ngx_time_mutex_init(cycle->log) == NGX_ERROR) { + /* fatal */ + exit(2); + } + + if (ngx_threads_n) { + if (ngx_init_threads(ngx_threads_n, + ccf->thread_stack_size, cycle) == NGX_ERROR) + { + /* fatal */ + exit(2); + } + + err = ngx_thread_key_create(&ngx_core_tls_key); + if (err != 0) { + ngx_log_error(NGX_LOG_ALERT, cycle->log, err, + ngx_thread_key_create_n " failed"); + /* fatal */ + exit(2); + } + + for (n = 0; n < ngx_threads_n; n++) { + + if (!(ngx_threads[n].cv = ngx_cond_init(cycle->log))) { + /* fatal */ + exit(2); + } + + if (ngx_create_thread((ngx_tid_t *) &ngx_threads[n].tid, + ngx_worker_thread_cycle, + (void *) &ngx_threads[n], cycle->log) != 0) + { + /* fatal */ + exit(2); + } + } + } + +#endif + + for ( ;; ) { + if (ngx_exiting + && ngx_event_timer_rbtree == &ngx_event_timer_sentinel) + { + ngx_log_error(NGX_LOG_INFO, cycle->log, 0, "exiting"); + + +#if (NGX_THREADS) + ngx_terminate = 1; + + ngx_wakeup_worker_threads(cycle); +#endif + + /* + * we do not destroy cycle->pool here because a signal handler + * that uses cycle->log can be called at this point + */ + exit(0); + } + + ngx_log_debug0(NGX_LOG_DEBUG_EVENT, cycle->log, 0, "worker cycle"); + + ngx_process_events(cycle); + + if (ngx_terminate) { + ngx_log_error(NGX_LOG_INFO, cycle->log, 0, "exiting"); + +#if (NGX_THREADS) + ngx_wakeup_worker_threads(cycle); +#endif + + /* + * we do not destroy cycle->pool here because a signal handler + * that uses cycle->log can be called at this point + */ + exit(0); + } + + if (ngx_quit) { + ngx_quit = 0; + ngx_log_error(NGX_LOG_INFO, cycle->log, 0, + "gracefully shutting down"); + ngx_setproctitle("worker process is shutting down"); + + if (!ngx_exiting) { + ngx_close_listening_sockets(cycle); + ngx_exiting = 1; + } + } + + if (ngx_reopen) { + ngx_reopen = 0; + ngx_log_error(NGX_LOG_INFO, cycle->log, 0, "reopen logs"); + ngx_reopen_files(cycle, -1); + } + } +} + + +static void ngx_channel_handler(ngx_event_t *ev) +{ + ngx_int_t n; + ngx_channel_t ch; + ngx_connection_t *c; + + c = ev->data; + + ngx_log_debug0(NGX_LOG_DEBUG_CORE, ev->log, 0, "channel handler"); + + n = ngx_read_channel(c->fd, &ch, sizeof(ngx_channel_t), ev->log); + + ngx_log_debug1(NGX_LOG_DEBUG_CORE, ev->log, 0, "channel: %d", n); + + if (n <= 0) { + return; + } + + ngx_log_debug1(NGX_LOG_DEBUG_CORE, ev->log, 0, + "channel command: %d", ch.command); + + switch (ch.command) { + + case NGX_CMD_QUIT: + ngx_quit = 1; + break; + + case NGX_CMD_TERMINATE: + ngx_terminate = 1; + break; + + case NGX_CMD_REOPEN: + ngx_reopen = 1; + break; + + case NGX_CMD_OPEN_CHANNEL: + + ngx_log_debug3(NGX_LOG_DEBUG_CORE, ev->log, 0, + "get channel s:%d pid:" PID_T_FMT " fd:%d", + ch.slot, ch.pid, ch.fd); + + ngx_processes[ch.slot].pid = ch.pid; + ngx_processes[ch.slot].channel[0] = ch.fd; + break; + + case NGX_CMD_CLOSE_CHANNEL: + + ngx_log_debug4(NGX_LOG_DEBUG_CORE, ev->log, 0, + "close channel s:%d pid:" PID_T_FMT " our:" PID_T_FMT + " fd:%d", + ch.slot, ch.pid, ngx_processes[ch.slot].pid, + ngx_processes[ch.slot].channel[0]); + + if (close(ngx_processes[ch.slot].channel[0]) == -1) { + ngx_log_error(NGX_LOG_ALERT, ev->log, ngx_errno, "close() failed"); + } + + ngx_processes[ch.slot].channel[0] = -1; + break; + } +} + + +#if (NGX_THREADS) + +static void ngx_wakeup_worker_threads(ngx_cycle_t *cycle) +{ + ngx_int_t i; + ngx_uint_t live; + + for ( ;; ) { + + live = 0; + + for (i = 0; i < ngx_threads_n; i++) { + if (ngx_threads[i].state < NGX_THREAD_EXIT) { + ngx_cond_signal(ngx_threads[i].cv); + + if (ngx_threads[i].cv->tid == (ngx_tid_t) -1) { + ngx_threads[i].state = NGX_THREAD_DONE; + } else { + live = 1; + } + } + + if (ngx_threads[i].state == NGX_THREAD_EXIT) { + ngx_thread_join(ngx_threads[i].tid, NULL); + ngx_threads[i].state = NGX_THREAD_DONE; + } + } + + if (live == 0) { + ngx_log_debug0(NGX_LOG_DEBUG_CORE, cycle->log, 0, + "all worker threads are joined"); + + /* STUB */ + ngx_done_events(cycle); + ngx_mutex_destroy(ngx_event_timer_mutex); + ngx_mutex_destroy(ngx_posted_events_mutex); + + return; + } + + ngx_sched_yield(); + } +} + + +static void* ngx_worker_thread_cycle(void *data) +{ + ngx_thread_t *thr = data; + + sigset_t set; + ngx_err_t err; + ngx_core_tls_t *tls; + ngx_cycle_t *cycle; + struct timeval tv; + + thr->cv->tid = ngx_thread_self(); + + cycle = (ngx_cycle_t *) ngx_cycle; + + sigemptyset(&set); + sigaddset(&set, ngx_signal_value(NGX_RECONFIGURE_SIGNAL)); + sigaddset(&set, ngx_signal_value(NGX_REOPEN_SIGNAL)); + sigaddset(&set, ngx_signal_value(NGX_CHANGEBIN_SIGNAL)); + + err = ngx_thread_sigmask(SIG_BLOCK, &set, NULL); + if (err) { + ngx_log_error(NGX_LOG_ALERT, cycle->log, err, + ngx_thread_sigmask_n " failed"); + return (void *) 1; + } + + ngx_log_debug1(NGX_LOG_DEBUG_CORE, cycle->log, 0, + "thread " TID_T_FMT " started", ngx_thread_self()); + + ngx_setthrtitle("worker thread"); + + if (!(tls = ngx_calloc(sizeof(ngx_core_tls_t), cycle->log))) { + return (void *) 1; + } + + err = ngx_thread_set_tls(ngx_core_tls_key, tls); + if (err != 0) { + ngx_log_error(NGX_LOG_ALERT, cycle->log, err, + ngx_thread_set_tls_n " failed"); + return (void *) 1; + } + + if (ngx_mutex_lock(ngx_posted_events_mutex) == NGX_ERROR) { + return (void *) 1; + } + + for ( ;; ) { + thr->state = NGX_THREAD_FREE; + + if (ngx_cond_wait(thr->cv, ngx_posted_events_mutex) == NGX_ERROR) { + return (void *) 1; + } + + if (ngx_terminate) { + thr->state = NGX_THREAD_EXIT; + + ngx_mutex_unlock(ngx_posted_events_mutex); + + ngx_log_debug1(NGX_LOG_DEBUG_CORE, cycle->log, 0, + "thread %d is done", ngx_thread_self()); + + return (void *) 0; + } + + thr->state = NGX_THREAD_BUSY; + + if (ngx_event_thread_process_posted(cycle) == NGX_ERROR) { + return (void *) 1; + } + + if (ngx_event_thread_process_posted(cycle) == NGX_ERROR) { + return (void *) 1; + } + + if (ngx_process_changes) { + if (ngx_process_changes(cycle, 1) == NGX_ERROR) { + return (void *) 1; + } + } + } +} + +#endif