static ngx_int_t
ngx_http_file_cache_manager_sleep(ngx_http_file_cache_t *cache)
{
ngx_msec_t elapsed;
if (cache->files++ > 100) {
ngx_time_update();
elapsed = ngx_abs((ngx_msec_int_t) (ngx_current_msec - cache->last));
ngx_log_debug1(NGX_LOG_DEBUG_HTTP, ngx_cycle->log, 0,
"http file cache manager time: %M", elapsed);
if (elapsed > 200) {
/*
* if processing 100 files takes more than 200ms,
* it seems that many operations require disk i/o,
* therefore sleep 200ms
*/
ngx_msleep(200);
ngx_time_update();
}
cache->last = ngx_current_msec;
cache->files = 0;
}
return (ngx_quit || ngx_terminate) ? NGX_ABORT : NGX_OK;
}
ngx_int_t
ngx_http_echo_timer_elapsed_variable(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data)
{
ngx_http_echo_ctx_t *ctx;
ngx_msec_int_t ms;
u_char *p;
ngx_time_t *tp;
size_t size;
ctx = ngx_http_get_module_ctx(r, ngx_http_echo_module);
if (ctx->timer_begin.sec == 0) {
ctx->timer_begin.sec = r->start_sec;
ctx->timer_begin.msec = (ngx_msec_t) r->start_msec;
}
/* force the ngx timer to update */
#if (nginx_version >= 8035) || (nginx_version < 8000 && nginx_version >= 7066)
ngx_time_update();
#else
ngx_time_update(0, 0);
#endif
tp = ngx_timeofday();
dd("old sec msec: %ld %d\n", ctx->timer_begin.sec, ctx->timer_begin.msec);
dd("new sec msec: %ld %d\n", tp->sec, tp->msec);
ms = (ngx_msec_int_t)
((tp->sec - ctx->timer_begin.sec) * 1000 +
(tp->msec - ctx->timer_begin.msec));
ms = (ms >= 0) ? ms : 0;
size = sizeof("-9223372036854775808.000") - 1;
p = ngx_palloc(r->pool, size);
if (p == NULL) {
return NGX_ERROR;
}
v->len = ngx_snprintf(p, size, "%T.%03M",
ms / 1000, ms % 1000) - p;
v->data = p;
v->valid = 1;
v->no_cacheable = 1;
v->not_found = 0;
return NGX_OK;
}
static time_t
ngx_pipe_get_now_sec()
{
ngx_time_update();
return ngx_time() + ngx_cached_time->gmtoff * 60;
}
//在ngx_thread_read把该handler添加到线程池中
static void //ngx_thread_read->ngx_thread_read_handler
ngx_thread_read_handler(void *data, ngx_log_t *log)
{//该函数执行后，会通过ngx_notify执行event.handler = ngx_http_cache_thread_event_handler;
ngx_thread_read_ctx_t *ctx = data;
ssize_t n;
ngx_log_debug0(NGX_LOG_DEBUG_CORE, log, 0, "thread read handler");
//缓存文件数据会拷贝到dst中，也就是ngx_output_chain_ctx_t->buf,然后在ngx_output_chain_copy_buf函数外层会重新把ctx->buf赋值给新的chain，然后write出去
n = pread(ctx->fd, ctx->buf, ctx->size, ctx->offset);
if (n == -1) {
ctx->err = ngx_errno;
} else {
ctx->read = n;
ctx->err = 0;
}
#if 0
ngx_time_update();
#endif
ngx_log_debug4(NGX_LOG_DEBUG_CORE, log, 0,
"pread read return read size: %z (err: %i) of buf-size%uz offset@%O",
n, ctx->err, ctx->size, ctx->offset);
}
/* 缓存加载进程的回调处理 */
static void
ngx_cache_loader_process_handler(ngx_event_t *ev)
{
ngx_uint_t i;
ngx_path_t **path;
ngx_cycle_t *cycle;
cycle = (ngx_cycle_t *) ngx_cycle;
path = cycle->paths.elts;
/* 将所有路径的缓存加载之后，进程就退出 */
for (i = 0; i < cycle->paths.nelts; i++) {
if (ngx_terminate || ngx_quit) {
break;
}
if (path[i]->loader) {
path[i]->loader(path[i]->data);
ngx_time_update();
}
}
exit(0);
}
static ngx_thread_value_t __stdcall
ngx_cache_loader_thread(void *data)
{
ngx_uint_t i;
ngx_path_t **path;
ngx_cycle_t *cycle;
ngx_msleep(60000);
cycle = (ngx_cycle_t *) ngx_cycle;
path = cycle->paths.elts;
for (i = 0; i < cycle->paths.nelts; i++) {
if (ngx_terminate || ngx_quit || ngx_exiting) {
break;
}
if (path[i]->loader) {
path[i]->loader(path[i]->data);
ngx_time_update();
}
}
return 0;
}
static void
ngx_thread_read_handler(void *data, ngx_log_t *log)
{
ngx_thread_read_ctx_t *ctx = data;
ssize_t n;
ngx_log_debug0(NGX_LOG_DEBUG_CORE, log, 0, "thread read handler");
n = pread(ctx->fd, ctx->buf, ctx->size, ctx->offset);
if (n == -1) {
ctx->err = ngx_errno;
} else {
ctx->read = n;
ctx->err = 0;
}
#if 0
ngx_time_update();
#endif
ngx_log_debug4(NGX_LOG_DEBUG_CORE, log, 0,
"pread: %z (err: %i) of %uz @%O",
n, ctx->err, ctx->size, ctx->offset);
}
/* 将文件添加到系统的file_cache管理中
* 参数path: 为普通文件的完整路径
*/
static ngx_int_t
ngx_http_file_cache_manage_file(ngx_tree_ctx_t *ctx, ngx_str_t *path)
{
ngx_msec_t elapsed;
ngx_http_file_cache_t *cache;
cache = ctx->data;
// 添加文件到file_cache中，建立node节点在红黑树中
if (ngx_http_file_cache_add_file(ctx, path) != NGX_OK) {
(void) ngx_http_file_cache_delete_file(ctx, path);
}
// 统计缓存文件并检查是否达到系统限制
if (++cache->files >= cache->loader_files) {
// why?? 为什么加载的cache文件达到限制后，将休眠并将 cache->files 的个数清零呢？？？
ngx_http_file_cache_loader_sleep(cache);
} else {
ngx_time_update();
elapsed = ngx_abs((ngx_msec_int_t) (ngx_current_msec - cache->last));
ngx_log_debug1(NGX_LOG_DEBUG_HTTP, ngx_cycle->log, 0,
"http file cache loader time elapsed: %M", elapsed);
if (elapsed >= cache->loader_threshold) {
ngx_http_file_cache_loader_sleep(cache);
}
}
return (ngx_quit || ngx_terminate) ? NGX_ABORT : NGX_OK;
}
static void
ngx_cache_manager_process_handler(ngx_event_t *ev)
{
time_t next, n;
ngx_uint_t i;
ngx_path_t **path;
next = 60 * 60;
path = ngx_cycle->paths.elts;
for (i = 0; i < ngx_cycle->paths.nelts; i++) {
if (path[i]->manager) {
n = path[i]->manager(path[i]->data);
next = (n <= next) ? n : next;
ngx_time_update();
}
}
if (next == 0) {
next = 1;
}
ngx_add_timer(ev, next * 1000);
}
int main (int argc, char *argv[])
{
time_t now;
u_char http_buf[BUFSIZ];
u_char cookie_buf[BUFSIZ];
ngx_time_init();
now = ngx_time();
ngx_http_time(http_buf, now);
ngx_http_cookie_time(cookie_buf, now);
printf("current timestamp:%zu\n", now);
printf("http time :%s\n", http_buf);
printf("cookie time :%s\n", cookie_buf);
printf("\n\nWait 10sec...\n\n");
sleep(10);
ngx_time_update();
now = ngx_time();
ngx_http_time(http_buf, now);
ngx_http_cookie_time(cookie_buf, now);
printf("current timestamp:%zu\n", now);
printf("http time :%s\n", http_buf);
printf("cookie time :%s\n", cookie_buf);
return 0;
}
static ngx_int_t
ngx_http_file_cache_manage_file(ngx_tree_ctx_t *ctx, ngx_str_t *path)
{
ngx_msec_t elapsed;
ngx_http_file_cache_t *cache;
cache = ctx->data;
if (ngx_http_file_cache_add_file(ctx, path) != NGX_OK) {
(void) ngx_http_file_cache_delete_file(ctx, path);
}
if (++cache->files >= cache->loader_files) {
ngx_http_file_cache_loader_sleep(cache);
} else {
ngx_time_update();
elapsed = ngx_abs((ngx_msec_int_t) (ngx_current_msec - cache->last));
ngx_log_debug1(NGX_LOG_DEBUG_HTTP, ngx_cycle->log, 0,
"http file cache loader time elapsed: %M", elapsed);
if (elapsed >= cache->loader_threshold) {
ngx_http_file_cache_loader_sleep(cache);
}
}
return (ngx_quit || ngx_terminate) ? NGX_ABORT : NGX_OK;
}
ngx_int_t
ngx_http_echo_exec_echo_reset_timer(ngx_http_request_t *r,
ngx_http_echo_ctx_t *ctx)
{
dd("Exec timer...");
/* force the ngx timer to update */
#if (nginx_version >= 8035) || (nginx_version < 8000 && nginx_version >= 7066)
ngx_time_update();
#else
ngx_time_update(0, 0);
#endif
ctx->timer_begin = *ngx_timeofday();
return NGX_OK;
}
static ngx_thread_value_t __stdcall
ngx_cache_manager_thread(void *data)
{
u_long ev;
HANDLE events[2];
ngx_err_t err;
ngx_cycle_t *cycle;
cycle = (ngx_cycle_t *) ngx_cycle;
events[0] = ngx_cache_manager_event;
events[1] = ngx_cache_manager_mutex;
for ( ;; ) {
ev = WaitForMultipleObjects(2, events, 0, INFINITE);
err = ngx_errno;
ngx_time_update();
ngx_log_debug1(NGX_LOG_DEBUG_CORE, cycle->log, 0,
"cache manager WaitForMultipleObjects: %ul", ev);
if (ev == WAIT_FAILED) {
ngx_log_error(NGX_LOG_ALERT, cycle->log, err,
"WaitForMultipleObjects() failed");
}
/*
* ev == WAIT_OBJECT_0
* ev == WAIT_OBJECT_0 + 1
* ev == WAIT_ABANDONED_0 + 1
*/
if (ngx_terminate || ngx_quit || ngx_exiting) {
ngx_log_error(NGX_LOG_NOTICE, cycle->log, 0, "exiting");
return 0;
}
break;
}
for ( ;; ) {
if (ngx_terminate || ngx_quit || ngx_exiting) {
ngx_log_error(NGX_LOG_NOTICE, cycle->log, 0, "exiting");
break;
}
ngx_cache_manager_process_handler();
}
if (ReleaseMutex(ngx_cache_manager_mutex) == 0) {
ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
"ReleaseMutex() failed");
}
return 0;
}
static void
ngx_http_file_cache_loader_sleep(ngx_http_file_cache_t *cache)
{
ngx_msleep(cache->loader_sleep);
ngx_time_update();
cache->last = ngx_current_msec;
cache->files = 0;
}
static void
ngx_selective_cache_purge_timer_reset(ngx_msec_t timer_interval, ngx_event_t *timer_event)
{
if (!ngx_exiting && (timer_interval != NGX_CONF_UNSET_MSEC)) {
if (timer_event->timedout) {
ngx_time_update();
}
ngx_add_timer(timer_event, timer_interval);
}
}
static void ngx_proc_luashm_backup_thread_cycle(void *data)
{
ngx_proc_luashm_backup_conf_t *pbcf;
ngx_cycle_t *cycle;
ngx_shm_zone_t *zone;
ngx_str_t *name;
ngx_uint_t i;
ngx_time_t *tp;
int64_t now,settimestamp;
cycle = data;
pbcf = ngx_proc_get_conf(cycle->conf_ctx, ngx_proc_luashm_backup_module);
if(pbcf->settimestamp.data == NULL){
pthread_exit((void *)0);
return;
}
while(pbcf->running){
ngx_time_update();
if(ngx_strstr(pbcf->settimestamp.data,":")==NULL){
settimestamp=ngx_atoi(pbcf->settimestamp.data,pbcf->settimestamp.len);
}else{
tp = ngx_timeofday();
now = (int64_t) tp->sec * 1000 + tp->msec;
settimestamp=GetTick((char*)pbcf->settimestamp.data)*1000;
ngx_log_error(NGX_LOG_DEBUG, ngx_cycle->log, 0, "========= now:%lu, settimestamp:%lu =========",now,settimestamp);
if(settimestamp<now)
settimestamp=(24*60*60*1000)-(now-settimestamp);
else
settimestamp=settimestamp-now;
if(settimestamp==0)settimestamp=1;
}
ngx_log_error(NGX_LOG_DEBUG, ngx_cycle->log, 0, "========= backup time:%s, sleeptime:%lu =========",pbcf->settimestamp.data,settimestamp);
ngx_msleep(settimestamp);
if(!pbcf->running)break;
i = 0;
for (; i < pbcf->shdict_names->nelts;i++)
{
name = ((ngx_str_t*)pbcf->shdict_names->elts) + i;
zone = ngx_http_lua_find_zone(name->data,name->len);
dd("shm.name:%s,shm.name_len:%ld,shm.size:%ld ", name->data,name->len,zone->shm.size);
ngx_proc_luashm_backup_backup(cycle,zone);
}
ngx_log_error(NGX_LOG_DEBUG, cycle->log, 0, "luashm_backup %V",&ngx_cached_http_time);
ngx_sleep(60);
if(!pbcf->running)break;
}
pthread_exit((void *)0);
}
//初始化当前进程中缓存的时间变量，同时会第一次根据gettimeofday调用刷新缓存时间
void ngx_time_init(void)
{
ngx_cached_err_log_time.len = sizeof("1970/09/28 12:00:00") - 1;
ngx_cached_http_time.len = sizeof("Mon, 28 Sep 1970 06:00:00 GMT") - 1;
ngx_cached_http_log_time.len = sizeof("28/Sep/1970:12:00:00 +0600") - 1;
ngx_cached_http_log_iso8601.len = sizeof("1970-09-28T12:00:00+06:00") - 1;
ngx_cached_time = &cached_time[0];
ngx_time_update();
}
void
ngx_timer_signal_handler(int signo)
{
ngx_event_timer_alarm = 1;
ngx_time_update(0, 0);
#if 1
ngx_log_debug0(NGX_LOG_DEBUG_EVENT, ngx_cycle->log, 0, "timer signal");
#endif
}
static void
ngx_cache_manager_process_handler(void)
{
u_long ev;
time_t next, n;
ngx_uint_t i;
ngx_path_t **path;
next = 60 * 60;
path = ngx_cycle->paths.elts;
for (i = 0; i < ngx_cycle->paths.nelts; i++) {
if (path[i]->manager) {
n = path[i]->manager(path[i]->data);
next = (n <= next) ? n : next;
ngx_time_update();
}
}
if (next == 0) {
next = 1;
}
ev = WaitForSingleObject(ngx_cache_manager_event, (u_long) next * 1000);
if (ev != WAIT_TIMEOUT) {
ngx_time_update();
ngx_log_debug1(NGX_LOG_DEBUG_CORE, ngx_cycle->log, 0,
"cache manager WaitForSingleObject: %ul", ev);
}
}
/* TODO: change impl when we'll get SFMT? */
ngx_int_t
ngx_nats_create_inbox(u_char *buf, size_t bufsize)
{
ngx_time_t *tp;
ngx_addr_t *local_ip;
u_char *pend;
size_t i;
uint32_t partA, partB, partC, partD, ipvar;
uint32_t r1, r2, r3, r4;
if (bufsize < 34) {
return NGX_ERROR;
}
ngx_time_update();
tp = ngx_timeofday();
local_ip = ngx_nats_get_local_ip();
ipvar = 0;
if (local_ip != NULL) {
for (i = 0; i < local_ip->name.len; i++) {
ipvar = (ipvar * 31) + (uint32_t)local_ip->name.data[i];
}
}
ngx_nats_init_random();
r1 = (uint32_t) ngx_nats_next_random();
r2 = (uint32_t) ngx_nats_next_random();
r3 = (uint32_t) ngx_nats_next_random();
r4 = (uint32_t) ngx_nats_next_random();
partA = _nats_rand4(ipvar, r1, (uint32_t)ngx_pid, (uint32_t)tp->msec);
partB = _nats_rand4(ipvar, r2, (uint32_t)ngx_pid, (uint32_t)tp->sec);
partC = _nats_rand4(ipvar, r3, (uint32_t)tp->sec, (uint32_t)tp->msec);
partD = (uint32_t) (r4 & 0x00ff); /* 1 byte only */
pend = ngx_snprintf(buf, bufsize, "_INBOX.%08xD%08xD%08xD%02xD", partA, partB, partC, partD);
*pend = 0;
return (ngx_int_t)(pend - buf);
}
ngx_int_t
ngx_thread_cond_wait(ngx_thread_cond_t *cond, ngx_thread_mutex_t *mtx,
ngx_log_t *log)
{
ngx_err_t err;
ngx_log_debug1(NGX_LOG_DEBUG_CORE, log, 0,
"pthread_cond_wait(%p) enter", cond);
/*
pthread_cond_wait(pthread_cond_t *cond, pthread_mutex_t*mutex)函数传入的参数mutex用于保护条件，因为我们在调用pthread_cond_wait时，
如果条件不成立我们就进入阻塞，但是进入阻塞这个期间，如果条件变量改变了的话，那我们就漏掉了这个条件。因为这个线程还没有放到等待队列上，
所以调用pthread_cond_wait前要先锁互斥量，即调用pthread_mutex_lock()，pthread_cond_wait在把线程放进阻塞队列后，自动对mutex进行解锁，
使得其它线程可以获得加锁的权利。这样其它线程才能对临界资源进行访问并在适当的时候唤醒这个阻塞的进程。当pthread_cond_wait返回的时候
又自动给mutex加锁。
实际上边代码的加解锁过程如下：
/ ***********pthread_cond_wait()的使用方法********** /
pthread_mutex_lock(&qlock); / *lock* /
pthread_cond_wait(&qready, &qlock); / *block-->unlock-->wait() return-->lock* /
pthread_mutex_unlock(&qlock); / *unlock* /
*/
//pthread_cond_wait内部执行流程是:进入阻塞--解锁--进入线程等待队列，添加满足(其他线程ngx_thread_cond_signal)后，再次加锁，然后返回，
//为什么在调用该函数的时候外层要先加锁，原因是在pthread_cond_wait内部进入阻塞状态有个过程，这个过程中其他线程cond signal，本线程
//检测不到该信号signal，所以外层加锁就是让本线程进入wait线程等待队列后，才允许其他线程cond signal唤醒本线程，就可以避免漏掉信号
err = pthread_cond_wait(cond, mtx); //该函数内部执行过程:block-->unlock-->wait() return-->lock
#if 0
ngx_time_update();
#endif
if (err == 0) {
ngx_log_debug1(NGX_LOG_DEBUG_CORE, log, 0,
"pthread_cond_wait(%p) exit", cond);
return NGX_OK;
}
ngx_log_error(NGX_LOG_ALERT, log, err, "pthread_cond_wait() failed");
return NGX_ERROR;
}
static ngx_thread_value_t __stdcall
ngx_iocp_timer(void *data)
{
ngx_msec_t timer = *(ngx_msec_t *) data;
ngx_log_debug2(NGX_LOG_DEBUG_EVENT, ngx_cycle->log, 0,
"THREAD %p %p", &msec, data);
for ( ;; ) {
Sleep(timer);
ngx_time_update();
#if 1
ngx_log_debug0(NGX_LOG_DEBUG_EVENT, ngx_cycle->log, 0, "timer");
#endif
}
#ifdef __WATCOMC__
return 0;
#endif
}
static void
ngx_linux_sendfile_thread_handler(void *data, ngx_log_t *log)
{
ngx_linux_sendfile_ctx_t *ctx = data;
off_t offset;
ssize_t n;
ngx_buf_t *file;
ngx_log_debug0(NGX_LOG_DEBUG_CORE, log, 0, "linux sendfile thread handler");
file = ctx->file;
offset = file->file_pos;
again:
n = sendfile(ctx->socket, file->file->fd, &offset, ctx->size);
if (n == -1) {
ctx->err = ngx_errno;
} else {
ctx->sent = n;
ctx->err = 0;
}
#if 0
ngx_time_update();
#endif
ngx_log_debug4(NGX_LOG_DEBUG_EVENT, log, 0,
"sendfile: %z (err: %i) of %uz @%O",
n, ctx->err, ctx->size, file->file_pos);
if (ctx->err == NGX_EINTR) {
goto again;
}
}
void
ngx_tcp_lua_log_session(ngx_tcp_session_t* s)
{
ngx_time_t *tp;
ngx_msec_int_t ms;
ngx_connection_t *c;
if(s->log_handler){
s->log_handler(s);
return;
}
c = s->connection;
ngx_time_update();//tmp
tp = ngx_timeofday();
ms = (ngx_msec_int_t)
((tp->sec - s->start_sec) * 1000 + (tp->msec - s->start_msec));
ms = ngx_max(ms, 0);
ngx_log_error(NGX_LOG_INFO, c->log, 0, "request time %T.%03M", ms / 1000, ms % 1000);
}
static ngx_int_t
ngx_rtsig_process_overflow(ngx_cycle_t *cycle, ngx_msec_t timer,
ngx_uint_t flags)
{
int name[2], rtsig_max, rtsig_nr, events, ready;
size_t len;
ngx_err_t err;
ngx_uint_t tested, n, i;
ngx_event_t *rev, *wev, **queue;
ngx_connection_t *c;
ngx_rtsig_conf_t *rtscf;
ngx_log_debug0(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
"rtsig process overflow");
rtscf = ngx_event_get_conf(ngx_cycle->conf_ctx, ngx_rtsig_module);
tested = 0;
for ( ;; ) {
n = 0;
while (n < rtscf->overflow_events) {
if (overflow_current == cycle->connection_n) {
break;
}
c = cycle->files[overflow_current++];
if (c == NULL || c->fd == -1) {
continue;
}
events = 0;
if (c->read->active && c->read->handler) {
events |= POLLIN;
}
if (c->write->active && c->write->handler) {
events |= POLLOUT;
}
if (events == 0) {
continue;
}
overflow_list[n].fd = c->fd;
overflow_list[n].events = events;
overflow_list[n].revents = 0;
n++;
}
if (n == 0) {
break;
}
for ( ;; ) {
ready = poll(overflow_list, n, 0);
ngx_log_debug1(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
"rtsig overflow poll:%d", ready);
if (ready == -1) {
err = ngx_errno;
ngx_log_error((err == NGX_EINTR) ? NGX_LOG_INFO : NGX_LOG_ALERT,
cycle->log, 0,
"poll() failed while the overflow recover");
if (err == NGX_EINTR) {
continue;
}
}
break;
}
if (ready <= 0) {
continue;
}
ngx_mutex_lock(ngx_posted_events_mutex);
for (i = 0; i < n; i++) {
c = cycle->files[overflow_list[i].fd];
if (c == NULL) {
continue;
}
rev = c->read;
if (rev->active
&& !rev->closed
&& rev->handler
&& (overflow_list[i].revents
& (POLLIN|POLLERR|POLLHUP|POLLNVAL)))
{
tested++;
if ((flags & NGX_POST_THREAD_EVENTS) && !rev->accept) {
rev->posted_ready = 1;
} else {
rev->ready = 1;
}
if (flags & NGX_POST_EVENTS) {
queue = (ngx_event_t **) (rev->accept ?
&ngx_posted_accept_events : &ngx_posted_events);
ngx_locked_post_event(rev, queue);
} else {
rev->handler(rev);
}
}
wev = c->write;
if (wev->active
&& !wev->closed
&& wev->handler
&& (overflow_list[i].revents
& (POLLOUT|POLLERR|POLLHUP|POLLNVAL)))
{
tested++;
if (flags & NGX_POST_THREAD_EVENTS) {
wev->posted_ready = 1;
} else {
wev->ready = 1;
}
if (flags & NGX_POST_EVENTS) {
ngx_locked_post_event(wev, &ngx_posted_events);
} else {
wev->handler(wev);
}
}
}
ngx_mutex_unlock(ngx_posted_events_mutex);
if (tested >= rtscf->overflow_test) {
if (ngx_linux_rtsig_max) {
/*
* Check the current rt queue length to prevent
* the new overflow.
*
* learn the "/proc/sys/kernel/rtsig-max" value because
* it can be changed since the last checking
*/
name[0] = CTL_KERN;
name[1] = KERN_RTSIGMAX;
len = sizeof(rtsig_max);
if (sysctl(name, 2, &rtsig_max, &len, NULL, 0) == -1) {
ngx_log_error(NGX_LOG_ALERT, cycle->log, errno,
"sysctl(KERN_RTSIGMAX) failed");
return NGX_ERROR;
}
/* name[0] = CTL_KERN; */
name[1] = KERN_RTSIGNR;
len = sizeof(rtsig_nr);
if (sysctl(name, 2, &rtsig_nr, &len, NULL, 0) == -1) {
ngx_log_error(NGX_LOG_ALERT, cycle->log, errno,
"sysctl(KERN_RTSIGNR) failed");
return NGX_ERROR;
}
/*
* drain the rt signal queue if the /"proc/sys/kernel/rtsig-nr"
* is bigger than
* "/proc/sys/kernel/rtsig-max" / "rtsig_overflow_threshold"
*/
if (rtsig_max / (int) rtscf->overflow_threshold < rtsig_nr) {
ngx_log_debug2(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
"rtsig queue state: %d/%d",
rtsig_nr, rtsig_max);
while (ngx_rtsig_process_events(cycle, 0, flags) == NGX_OK)
{
/* void */
}
}
} else {
/*
* Linux has not KERN_RTSIGMAX since 2.6.6-mm2
* so drain the rt signal queue unconditionally
*/
while (ngx_rtsig_process_events(cycle, 0, flags) == NGX_OK) {
/* void */
}
}
tested = 0;
}
}
if (flags & NGX_UPDATE_TIME) {
ngx_time_update();
}
ngx_log_error(NGX_LOG_ALERT, cycle->log, 0,
"rt signal queue overflow recovered");
overflow = 0;
ngx_event_actions.process_events = ngx_rtsig_process_events;
return NGX_OK;
}
static ngx_int_t
ngx_rtsig_process_events(ngx_cycle_t *cycle, ngx_msec_t timer, ngx_uint_t flags)
{
int signo;
ngx_int_t instance;
ngx_err_t err;
siginfo_t si;
ngx_event_t *rev, *wev, **queue;
struct timespec ts, *tp;
struct sigaction sa;
ngx_connection_t *c;
ngx_rtsig_conf_t *rtscf;
if (timer == NGX_TIMER_INFINITE) {
tp = NULL;
} else {
ts.tv_sec = timer / 1000;
ts.tv_nsec = (timer % 1000) * 1000000;
tp = &ts;
}
ngx_log_debug1(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
"rtsig timer: %M", timer);
/* Linux's sigwaitinfo() is sigtimedwait() with the NULL timeout pointer */
signo = sigtimedwait(&set, &si, tp);
if (signo == -1) {
err = ngx_errno;
ngx_log_debug1(NGX_LOG_DEBUG_EVENT, cycle->log, err,
"rtsig signo:%d", signo);
if (flags & NGX_UPDATE_TIME) {
ngx_time_update();
}
if (err == NGX_EAGAIN) {
/* timeout */
if (timer != NGX_TIMER_INFINITE) {
return NGX_AGAIN;
}
ngx_log_error(NGX_LOG_ALERT, cycle->log, err,
"sigtimedwait() returned EAGAIN without timeout");
return NGX_ERROR;
}
ngx_log_error((err == NGX_EINTR) ? NGX_LOG_INFO : NGX_LOG_ALERT,
cycle->log, err, "sigtimedwait() failed");
return NGX_ERROR;
}
ngx_log_debug3(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
"rtsig signo:%d fd:%d band:%04Xd",
signo, si.si_fd, si.si_band);
if (flags & NGX_UPDATE_TIME) {
ngx_time_update();
}
rtscf = ngx_event_get_conf(ngx_cycle->conf_ctx, ngx_rtsig_module);
if (signo == (int) rtscf->signo || signo == (int) rtscf->signo + 1) {
if (overflow && (ngx_uint_t) si.si_fd > overflow_current) {
return NGX_OK;
}
c = ngx_cycle->files[si.si_fd];
if (c == NULL) {
/* the stale event */
return NGX_OK;
}
instance = signo - (int) rtscf->signo;
rev = c->read;
if (rev->instance != instance) {
/*
* the stale event from a file descriptor
* that was just closed in this iteration
*/
ngx_log_debug1(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
"rtsig: stale event %p", c);
return NGX_OK;
}
if ((si.si_band & (POLLIN|POLLHUP|POLLERR)) && rev->active) {
rev->ready = 1;
if (flags & NGX_POST_EVENTS) {
queue = (ngx_event_t **) (rev->accept ?
&ngx_posted_accept_events : &ngx_posted_events);
ngx_locked_post_event(rev, queue);
} else {
rev->handler(rev);
}
}
wev = c->write;
if ((si.si_band & (POLLOUT|POLLHUP|POLLERR)) && wev->active) {
wev->ready = 1;
if (flags & NGX_POST_EVENTS) {
ngx_locked_post_event(wev, &ngx_posted_events);
} else {
wev->handler(wev);
}
}
return NGX_OK;
} else if (signo == SIGALRM) {
ngx_time_update();
return NGX_OK;
} else if (signo == SIGIO) {
ngx_log_error(NGX_LOG_ALERT, cycle->log, 0,
"rt signal queue overflowed");
/* flush the RT signal queue */
ngx_memzero(&sa, sizeof(struct sigaction));
sa.sa_handler = SIG_DFL;
sigemptyset(&sa.sa_mask);
if (sigaction(rtscf->signo, &sa, NULL) == -1) {
ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
"sigaction(%d, SIG_DFL) failed", rtscf->signo);
}
if (sigaction(rtscf->signo + 1, &sa, NULL) == -1) {
ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
"sigaction(%d, SIG_DFL) failed", rtscf->signo + 1);
}
overflow = 1;
overflow_current = 0;
ngx_event_actions.process_events = ngx_rtsig_process_overflow;
return NGX_ERROR;
}
ngx_log_error(NGX_LOG_ALERT, cycle->log, 0,
"sigtimedwait() returned unexpected signal: %d", signo);
return NGX_ERROR;
}
ngx_cycle_t *
ngx_init_cycle(ngx_cycle_t *old_cycle)
{
void *rv;
char **senv, **env;
ngx_uint_t i, n;
ngx_log_t *log;
ngx_time_t *tp;
ngx_conf_t conf;
ngx_pool_t *pool;
ngx_cycle_t *cycle, **old;
ngx_shm_zone_t *shm_zone, *oshm_zone;
ngx_list_part_t *part, *opart;
ngx_open_file_t *file;
ngx_listening_t *ls, *nls;
ngx_core_conf_t *ccf, *old_ccf;
ngx_core_module_t *module;
char hostname[NGX_MAXHOSTNAMELEN];
ngx_timezone_update();
/* force localtime update with a new timezone */
tp = ngx_timeofday();
tp->sec = 0;
ngx_time_update();
log = old_cycle->log;
pool = ngx_create_pool(NGX_CYCLE_POOL_SIZE, log);
if (pool == NULL) {
return NULL;
}
pool->log = log;
cycle = ngx_pcalloc(pool, sizeof(ngx_cycle_t));
if (cycle == NULL) {
ngx_destroy_pool(pool);
return NULL;
}
cycle->pool = pool;
cycle->log = log;
cycle->old_cycle = old_cycle;
cycle->conf_prefix.len = old_cycle->conf_prefix.len;
cycle->conf_prefix.data = ngx_pstrdup(pool, &old_cycle->conf_prefix);
if (cycle->conf_prefix.data == NULL) {
ngx_destroy_pool(pool);
return NULL;
}
cycle->prefix.len = old_cycle->prefix.len;
cycle->prefix.data = ngx_pstrdup(pool, &old_cycle->prefix);
if (cycle->prefix.data == NULL) {
ngx_destroy_pool(pool);
return NULL;
}
cycle->conf_file.len = old_cycle->conf_file.len;
cycle->conf_file.data = ngx_pnalloc(pool, old_cycle->conf_file.len + 1);
if (cycle->conf_file.data == NULL) {
ngx_destroy_pool(pool);
return NULL;
}
ngx_cpystrn(cycle->conf_file.data, old_cycle->conf_file.data,
old_cycle->conf_file.len + 1);
cycle->conf_param.len = old_cycle->conf_param.len;
cycle->conf_param.data = ngx_pstrdup(pool, &old_cycle->conf_param);
if (cycle->conf_param.data == NULL) {
ngx_destroy_pool(pool);
return NULL;
}
n = old_cycle->paths.nelts ? old_cycle->paths.nelts : 10;
cycle->paths.elts = ngx_pcalloc(pool, n * sizeof(ngx_path_t *));
if (cycle->paths.elts == NULL) {
ngx_destroy_pool(pool);
return NULL;
}
cycle->paths.nelts = 0;
cycle->paths.size = sizeof(ngx_path_t *);
cycle->paths.nalloc = n;
cycle->paths.pool = pool;
if (old_cycle->open_files.part.nelts) {
n = old_cycle->open_files.part.nelts;
for (part = old_cycle->open_files.part.next; part; part = part->next) {
n += part->nelts;
}
} else {
n = 20;
}
if (ngx_list_init(&cycle->open_files, pool, n, sizeof(ngx_open_file_t))
!= NGX_OK)
{
ngx_destroy_pool(pool);
return NULL;
}
if (old_cycle->shared_memory.part.nelts) {
n = old_cycle->shared_memory.part.nelts;
for (part = old_cycle->shared_memory.part.next; part; part = part->next)
{
n += part->nelts;
}
} else {
n = 1;
}
if (ngx_list_init(&cycle->shared_memory, pool, n, sizeof(ngx_shm_zone_t))
!= NGX_OK)
{
ngx_destroy_pool(pool);
return NULL;
}
n = old_cycle->listening.nelts ? old_cycle->listening.nelts : 10;
cycle->listening.elts = ngx_pcalloc(pool, n * sizeof(ngx_listening_t));
if (cycle->listening.elts == NULL) {
ngx_destroy_pool(pool);
return NULL;
}
cycle->listening.nelts = 0;
cycle->listening.size = sizeof(ngx_listening_t);
cycle->listening.nalloc = n;
cycle->listening.pool = pool;
ngx_queue_init(&cycle->reusable_connections_queue);
cycle->conf_ctx = ngx_pcalloc(pool, ngx_max_module * sizeof(void *));
if (cycle->conf_ctx == NULL) {
ngx_destroy_pool(pool);
return NULL;
}
if (gethostname(hostname, NGX_MAXHOSTNAMELEN) == -1) {
ngx_log_error(NGX_LOG_EMERG, log, ngx_errno, "gethostname() failed");
ngx_destroy_pool(pool);
return NULL;
}
/* on Linux gethostname() silently truncates name that does not fit */
hostname[NGX_MAXHOSTNAMELEN - 1] = '\0';
cycle->hostname.len = ngx_strlen(hostname);
cycle->hostname.data = ngx_pnalloc(pool, cycle->hostname.len);
if (cycle->hostname.data == NULL) {
ngx_destroy_pool(pool);
return NULL;
}
ngx_strlow(cycle->hostname.data, (u_char *) hostname, cycle->hostname.len);
for (i = 0; ngx_modules[i]; i++) {
if (ngx_modules[i]->type != NGX_CORE_MODULE) {
continue;
}
module = ngx_modules[i]->ctx;
if (module->create_conf) {
rv = module->create_conf(cycle);
if (rv == NULL) {
ngx_destroy_pool(pool);
return NULL;
}
cycle->conf_ctx[ngx_modules[i]->index] = rv;
}
}
senv = environ;
ngx_memzero(&conf, sizeof(ngx_conf_t));
/* STUB: init array ? */
conf.args = ngx_array_create(pool, 10, sizeof(ngx_str_t));
if (conf.args == NULL) {
ngx_destroy_pool(pool);
return NULL;
}
conf.temp_pool = ngx_create_pool(NGX_CYCLE_POOL_SIZE, log);
if (conf.temp_pool == NULL) {
ngx_destroy_pool(pool);
return NULL;
}
conf.ctx = cycle->conf_ctx;
conf.cycle = cycle;
conf.pool = pool;
conf.log = log;
conf.module_type = NGX_CORE_MODULE;
conf.cmd_type = NGX_MAIN_CONF;
#if 0
log->log_level = NGX_LOG_DEBUG_ALL;
#endif
if (ngx_conf_param(&conf) != NGX_CONF_OK) {
environ = senv;
ngx_destroy_cycle_pools(&conf);
return NULL;
}
if (ngx_conf_parse(&conf, &cycle->conf_file) != NGX_CONF_OK) {
environ = senv;
ngx_destroy_cycle_pools(&conf);
return NULL;
}
if (ngx_test_config && !ngx_quiet_mode) {
ngx_log_stderr(0, "the configuration file %s syntax is ok",
cycle->conf_file.data);
}
for (i = 0; ngx_modules[i]; i++) {
if (ngx_modules[i]->type != NGX_CORE_MODULE) {
continue;
}
module = ngx_modules[i]->ctx;
if (module->init_conf) {
if (module->init_conf(cycle, cycle->conf_ctx[ngx_modules[i]->index])
== NGX_CONF_ERROR)
{
environ = senv;
ngx_destroy_cycle_pools(&conf);
return NULL;
}
}
}
if (ngx_process == NGX_PROCESS_SIGNALLER) {
return cycle;
}
ccf = (ngx_core_conf_t *) ngx_get_conf(cycle->conf_ctx, ngx_core_module);
if (ngx_test_config) {
if (ngx_create_pidfile(&ccf->pid, log) != NGX_OK) {
goto failed;
}
} else if (!ngx_is_init_cycle(old_cycle)) {
/*
* we do not create the pid file in the first ngx_init_cycle() call
* because we need to write the demonized process pid
*/
old_ccf = (ngx_core_conf_t *) ngx_get_conf(old_cycle->conf_ctx,
ngx_core_module);
if (ccf->pid.len != old_ccf->pid.len
|| ngx_strcmp(ccf->pid.data, old_ccf->pid.data) != 0)
{
/* new pid file name */
if (ngx_create_pidfile(&ccf->pid, log) != NGX_OK) {
goto failed;
}
ngx_delete_pidfile(old_cycle);
}
}
if (ngx_test_lockfile(cycle->lock_file.data, log) != NGX_OK) {
goto failed;
}
if (ngx_create_paths(cycle, ccf->user) != NGX_OK) {
goto failed;
}
if (ngx_log_open_default(cycle) != NGX_OK) {
goto failed;
}
/* open the new files */
part = &cycle->open_files.part;
file = part->elts;
for (i = 0; /* void */ ; i++) {
if (i >= part->nelts) {
if (part->next == NULL) {
break;
}
part = part->next;
file = part->elts;
i = 0;
}
if (file[i].name.len == 0) {
continue;
}
file[i].fd = ngx_open_file(file[i].name.data,
NGX_FILE_APPEND,
NGX_FILE_CREATE_OR_OPEN,
NGX_FILE_DEFAULT_ACCESS);
ngx_log_debug3(NGX_LOG_DEBUG_CORE, log, 0,
"log: %p %d \"%s\"",
&file[i], file[i].fd, file[i].name.data);
if (file[i].fd == NGX_INVALID_FILE) {
ngx_log_error(NGX_LOG_EMERG, log, ngx_errno,
ngx_open_file_n " \"%s\" failed",
file[i].name.data);
goto failed;
}
#if !(NGX_WIN32)
if (fcntl(file[i].fd, F_SETFD, FD_CLOEXEC) == -1) {
ngx_log_error(NGX_LOG_EMERG, log, ngx_errno,
"fcntl(FD_CLOEXEC) \"%s\" failed",
file[i].name.data);
goto failed;
}
#endif
}
cycle->log = &cycle->new_log;
pool->log = &cycle->new_log;
/* create shared memory */
part = &cycle->shared_memory.part;
shm_zone = part->elts;
for (i = 0; /* void */ ; i++) {
if (i >= part->nelts) {
if (part->next == NULL) {
break;
}
part = part->next;
shm_zone = part->elts;
i = 0;
}
if (shm_zone[i].shm.size == 0) {
ngx_log_error(NGX_LOG_EMERG, log, 0,
"zero size shared memory zone \"%V\"",
&shm_zone[i].shm.name);
goto failed;
}
shm_zone[i].shm.log = cycle->log;
opart = &old_cycle->shared_memory.part;
oshm_zone = opart->elts;
for (n = 0; /* void */ ; n++) {
if (n >= opart->nelts) {
if (opart->next == NULL) {
break;
}
opart = opart->next;
oshm_zone = opart->elts;
n = 0;
}
if (shm_zone[i].shm.name.len != oshm_zone[n].shm.name.len) {
continue;
}
if (ngx_strncmp(shm_zone[i].shm.name.data,
oshm_zone[n].shm.name.data,
shm_zone[i].shm.name.len)
!= 0)
{
continue;
}
if (shm_zone[i].tag == oshm_zone[n].tag
&& shm_zone[i].shm.size == oshm_zone[n].shm.size)
{
shm_zone[i].shm.addr = oshm_zone[n].shm.addr;
if (shm_zone[i].init(&shm_zone[i], oshm_zone[n].data)
!= NGX_OK)
{
goto failed;
}
goto shm_zone_found;
}
ngx_shm_free(&oshm_zone[n].shm);
break;
}
if (ngx_shm_alloc(&shm_zone[i].shm) != NGX_OK) {
goto failed;
}
if (ngx_init_zone_pool(cycle, &shm_zone[i]) != NGX_OK) {
goto failed;
}
if (shm_zone[i].init(&shm_zone[i], NULL) != NGX_OK) {
goto failed;
}
shm_zone_found:
continue;
}
/* handle the listening sockets */
if (old_cycle->listening.nelts) {
ls = old_cycle->listening.elts;
for (i = 0; i < old_cycle->listening.nelts; i++) {
ls[i].remain = 0;
}
nls = cycle->listening.elts;
for (n = 0; n < cycle->listening.nelts; n++) {
for (i = 0; i < old_cycle->listening.nelts; i++) {
if (ls[i].ignore) {
continue;
}
if (ngx_cmp_sockaddr(nls[n].sockaddr, ls[i].sockaddr) == NGX_OK)
{
nls[n].fd = ls[i].fd;
nls[n].previous = &ls[i];
ls[i].remain = 1;
if (ls[n].backlog != nls[i].backlog) {
nls[n].listen = 1;
}
#if (NGX_HAVE_DEFERRED_ACCEPT && defined SO_ACCEPTFILTER)
/*
* FreeBSD, except the most recent versions,
* could not remove accept filter
*/
nls[n].deferred_accept = ls[i].deferred_accept;
if (ls[i].accept_filter && nls[n].accept_filter) {
if (ngx_strcmp(ls[i].accept_filter,
nls[n].accept_filter)
!= 0)
{
nls[n].delete_deferred = 1;
nls[n].add_deferred = 1;
}
} else if (ls[i].accept_filter) {
nls[n].delete_deferred = 1;
} else if (nls[n].accept_filter) {
nls[n].add_deferred = 1;
}
#endif
#if (NGX_HAVE_DEFERRED_ACCEPT && defined TCP_DEFER_ACCEPT)
if (ls[n].deferred_accept && !nls[n].deferred_accept) {
nls[n].delete_deferred = 1;
} else if (ls[i].deferred_accept != nls[n].deferred_accept)
{
nls[n].add_deferred = 1;
}
#endif
break;
}
}
if (nls[n].fd == (ngx_socket_t) -1) {
nls[n].open = 1;
#if (NGX_HAVE_DEFERRED_ACCEPT && defined SO_ACCEPTFILTER)
if (nls[n].accept_filter) {
nls[n].add_deferred = 1;
}
#endif
#if (NGX_HAVE_DEFERRED_ACCEPT && defined TCP_DEFER_ACCEPT)
if (nls[n].deferred_accept) {
nls[n].add_deferred = 1;
}
#endif
}
}
} else {
ls = cycle->listening.elts;
for (i = 0; i < cycle->listening.nelts; i++) {
ls[i].open = 1;
#if (NGX_HAVE_DEFERRED_ACCEPT && defined SO_ACCEPTFILTER)
if (ls[i].accept_filter) {
ls[i].add_deferred = 1;
}
#endif
#if (NGX_HAVE_DEFERRED_ACCEPT && defined TCP_DEFER_ACCEPT)
if (ls[i].deferred_accept) {
ls[i].add_deferred = 1;
}
#endif
}
}
if (ngx_open_listening_sockets(cycle) != NGX_OK) {
goto failed;
}
if (!ngx_test_config) {
ngx_configure_listening_sockets(cycle);
}
/* commit the new cycle configuration */
if (!ngx_use_stderr) {
(void) ngx_log_redirect_stderr(cycle);
}
pool->log = cycle->log;
for (i = 0; ngx_modules[i]; i++) {
if (ngx_modules[i]->init_module) {
if (ngx_modules[i]->init_module(cycle) != NGX_OK) {
/* fatal */
exit(1);
}
}
}
/* close and delete stuff that lefts from an old cycle */
/* free the unnecessary shared memory */
opart = &old_cycle->shared_memory.part;
oshm_zone = opart->elts;
for (i = 0; /* void */ ; i++) {
if (i >= opart->nelts) {
if (opart->next == NULL) {
goto old_shm_zone_done;
}
opart = opart->next;
oshm_zone = opart->elts;
i = 0;
}
part = &cycle->shared_memory.part;
shm_zone = part->elts;
for (n = 0; /* void */ ; n++) {
if (n >= part->nelts) {
if (part->next == NULL) {
break;
}
part = part->next;
shm_zone = part->elts;
n = 0;
}
if (oshm_zone[i].shm.name.len == shm_zone[n].shm.name.len
&& ngx_strncmp(oshm_zone[i].shm.name.data,
shm_zone[n].shm.name.data,
oshm_zone[i].shm.name.len)
== 0)
{
goto live_shm_zone;
}
}
ngx_shm_free(&oshm_zone[i].shm);
live_shm_zone:
continue;
}
old_shm_zone_done:
/* close the unnecessary listening sockets */
ls = old_cycle->listening.elts;
for (i = 0; i < old_cycle->listening.nelts; i++) {
if (ls[i].remain || ls[i].fd == (ngx_socket_t) -1) {
continue;
}
if (ngx_close_socket(ls[i].fd) == -1) {
ngx_log_error(NGX_LOG_EMERG, log, ngx_socket_errno,
ngx_close_socket_n " listening socket on %V failed",
&ls[i].addr_text);
}
#if (NGX_HAVE_UNIX_DOMAIN)
if (ls[i].sockaddr->sa_family == AF_UNIX) {
u_char *name;
name = ls[i].addr_text.data + sizeof("unix:") - 1;
ngx_log_error(NGX_LOG_WARN, cycle->log, 0,
"deleting socket %s", name);
if (ngx_delete_file(name) == NGX_FILE_ERROR) {
ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_socket_errno,
ngx_delete_file_n " %s failed", name);
}
}
#endif
}
/* close the unnecessary open files */
part = &old_cycle->open_files.part;
file = part->elts;
for (i = 0; /* void */ ; i++) {
if (i >= part->nelts) {
if (part->next == NULL) {
break;
}
part = part->next;
file = part->elts;
i = 0;
}
if (file[i].fd == NGX_INVALID_FILE || file[i].fd == ngx_stderr) {
continue;
}
if (ngx_close_file(file[i].fd) == NGX_FILE_ERROR) {
ngx_log_error(NGX_LOG_EMERG, log, ngx_errno,
ngx_close_file_n " \"%s\" failed",
file[i].name.data);
}
}
ngx_destroy_pool(conf.temp_pool);
if (ngx_process == NGX_PROCESS_MASTER || ngx_is_init_cycle(old_cycle)) {
/*
* perl_destruct() frees environ, if it is not the same as it was at
* perl_construct() time, therefore we save the previous cycle
* environment before ngx_conf_parse() where it will be changed.
*/
env = environ;
environ = senv;
ngx_destroy_pool(old_cycle->pool);
cycle->old_cycle = NULL;
environ = env;
return cycle;
}
if (ngx_temp_pool == NULL) {
ngx_temp_pool = ngx_create_pool(128, cycle->log);
if (ngx_temp_pool == NULL) {
ngx_log_error(NGX_LOG_EMERG, cycle->log, 0,
"could not create ngx_temp_pool");
exit(1);
}
n = 10;
ngx_old_cycles.elts = ngx_pcalloc(ngx_temp_pool,
n * sizeof(ngx_cycle_t *));
if (ngx_old_cycles.elts == NULL) {
exit(1);
}
ngx_old_cycles.nelts = 0;
ngx_old_cycles.size = sizeof(ngx_cycle_t *);
ngx_old_cycles.nalloc = n;
ngx_old_cycles.pool = ngx_temp_pool;
ngx_cleaner_event.handler = ngx_clean_old_cycles;
ngx_cleaner_event.log = cycle->log;
ngx_cleaner_event.data = &dumb;
dumb.fd = (ngx_socket_t) -1;
}
ngx_temp_pool->log = cycle->log;
old = ngx_array_push(&ngx_old_cycles);
if (old == NULL) {
exit(1);
}
*old = old_cycle;
if (!ngx_cleaner_event.timer_set) {
ngx_add_timer(&ngx_cleaner_event, 30000);
ngx_cleaner_event.timer_set = 1;
}
return cycle;
failed:
if (!ngx_is_init_cycle(old_cycle)) {
old_ccf = (ngx_core_conf_t *) ngx_get_conf(old_cycle->conf_ctx,
ngx_core_module);
if (old_ccf->environment) {
environ = old_ccf->environment;
}
}
/* rollback the new cycle configuration */
part = &cycle->open_files.part;
file = part->elts;
for (i = 0; /* void */ ; i++) {
if (i >= part->nelts) {
if (part->next == NULL) {
break;
}
part = part->next;
file = part->elts;
i = 0;
}
if (file[i].fd == NGX_INVALID_FILE || file[i].fd == ngx_stderr) {
continue;
}
if (ngx_close_file(file[i].fd) == NGX_FILE_ERROR) {
ngx_log_error(NGX_LOG_EMERG, log, ngx_errno,
ngx_close_file_n " \"%s\" failed",
file[i].name.data);
}
}
if (ngx_test_config) {
ngx_destroy_cycle_pools(&conf);
return NULL;
}
ls = cycle->listening.elts;
for (i = 0; i < cycle->listening.nelts; i++) {
if (ls[i].fd == (ngx_socket_t) -1 || !ls[i].open) {
continue;
}
if (ngx_close_socket(ls[i].fd) == -1) {
ngx_log_error(NGX_LOG_EMERG, log, ngx_socket_errno,
ngx_close_socket_n " %V failed",
&ls[i].addr_text);
}
}
ngx_destroy_cycle_pools(&conf);
return NULL;
}
static ngx_int_t
ngx_kqueue_process_events(ngx_cycle_t *cycle, ngx_msec_t timer,
ngx_uint_t flags)
{
int events, n;
ngx_int_t i, instance;
ngx_uint_t level;
ngx_err_t err;
ngx_event_t *ev;
ngx_queue_t *queue;
struct timespec ts, *tp;
n = (int) nchanges;
nchanges = 0;
if (timer == NGX_TIMER_INFINITE)
{
tp = NULL;
}
else
{
ts.tv_sec = timer / 1000;
ts.tv_nsec = (timer % 1000) * 1000000;
/*
* 64-bit Darwin kernel has the bug: kernel level ts.tv_nsec is
* the int32_t while user level ts.tv_nsec is the long (64-bit),
* so on the big endian PowerPC all nanoseconds are lost.
*/
#if (NGX_DARWIN_KEVENT_BUG)
ts.tv_nsec <<= 32;
#endif
tp = &ts;
}
ngx_log_debug2(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
"kevent timer: %M, changes: %d", timer, n);
events = kevent(ngx_kqueue, change_list, n, event_list, (int) nevents, tp);
err = (events == -1) ? ngx_errno : 0;
if (flags & NGX_UPDATE_TIME || ngx_event_timer_alarm)
{
ngx_time_update();
}
ngx_log_debug1(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
"kevent events: %d", events);
if (err)
{
if (err == NGX_EINTR)
{
if (ngx_event_timer_alarm)
{
ngx_event_timer_alarm = 0;
return NGX_OK;
}
level = NGX_LOG_INFO;
}
else
{
level = NGX_LOG_ALERT;
}
ngx_log_error(level, cycle->log, err, "kevent() failed");
return NGX_ERROR;
}
if (events == 0)
{
if (timer != NGX_TIMER_INFINITE)
{
return NGX_OK;
}
ngx_log_error(NGX_LOG_ALERT, cycle->log, 0,
"kevent() returned no events without timeout");
return NGX_ERROR;
}
for (i = 0; i < events; i++)
{
ngx_kqueue_dump_event(cycle->log, &event_list[i]);
if (event_list[i].flags & EV_ERROR)
{
ngx_log_error(NGX_LOG_ALERT, cycle->log, event_list[i].data,
"kevent() error on %d filter:%d flags:%04Xd",
event_list[i].ident, event_list[i].filter,
event_list[i].flags);
continue;
}
#if (NGX_HAVE_TIMER_EVENT)
if (event_list[i].filter == EVFILT_TIMER)
{
ngx_time_update();
continue;
}
#endif
ev = (ngx_event_t *) event_list[i].udata;
switch (event_list[i].filter)
{
case EVFILT_READ:
case EVFILT_WRITE:
instance = (uintptr_t) ev & 1;
ev = (ngx_event_t *)((uintptr_t) ev & (uintptr_t) ~1);
if (ev->closed || ev->instance != instance)
{
/*
* the stale event from a file descriptor
* that was just closed in this iteration
*/
ngx_log_debug1(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
"kevent: stale event %p", ev);
continue;
}
if (ev->log && (ev->log->log_level & NGX_LOG_DEBUG_CONNECTION))
{
ngx_kqueue_dump_event(ev->log, &event_list[i]);
}
if (ev->oneshot)
{
ev->active = 0;
}
ev->available = event_list[i].data;
if (event_list[i].flags & EV_EOF)
{
ev->pending_eof = 1;
ev->kq_errno = event_list[i].fflags;
}
ev->ready = 1;
break;
case EVFILT_VNODE:
ev->kq_vnode = 1;
break;
case EVFILT_AIO:
ev->complete = 1;
ev->ready = 1;
break;
#ifdef EVFILT_USER
case EVFILT_USER:
break;
#endif
default:
ngx_log_error(NGX_LOG_ALERT, cycle->log, 0,
"unexpected kevent() filter %d",
event_list[i].filter);
continue;
}
if (flags & NGX_POST_EVENTS)
{
queue = ev->accept ? &ngx_posted_accept_events
: &ngx_posted_events;
ngx_post_event(ev, queue);
continue;
}
ev->handler(ev);
}
return NGX_OK;
}
ngx_int_t
ngx_devpoll_process_events(ngx_cycle_t *cycle, ngx_msec_t timer,
ngx_uint_t flags)
{
int events, revents, rc;
size_t n;
ngx_fd_t fd;
ngx_err_t err;
ngx_int_t i;
ngx_uint_t level, instance;
ngx_event_t *rev, *wev, **queue;
ngx_connection_t *c;
struct pollfd pfd;
struct dvpoll dvp;
/* NGX_TIMER_INFINITE == INFTIM */
ngx_log_debug1(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
"devpoll timer: %M", timer);
if (nchanges) {
n = nchanges * sizeof(struct pollfd);
if (write(dp, change_list, n) != (ssize_t) n) {
ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
"write(/dev/poll) failed");
return NGX_ERROR;
}
nchanges = 0;
}
dvp.dp_fds = event_list;
dvp.dp_nfds = (int) nevents;
dvp.dp_timeout = timer;
events = ioctl(dp, DP_POLL, &dvp);
err = (events == -1) ? ngx_errno : 0;
if (flags & NGX_UPDATE_TIME || ngx_event_timer_alarm) {
ngx_time_update();
}
if (err) {
if (err == NGX_EINTR) {
if (ngx_event_timer_alarm) {
ngx_event_timer_alarm = 0;
return NGX_OK;
}
level = NGX_LOG_INFO;
} else {
level = NGX_LOG_ALERT;
}
ngx_log_error(level, cycle->log, err, "ioctl(DP_POLL) failed");
return NGX_ERROR;
}
if (events == 0) {
if (timer != NGX_TIMER_INFINITE) {
return NGX_OK;
}
ngx_log_error(NGX_LOG_ALERT, cycle->log, 0,
"ioctl(DP_POLL) returned no events without timeout");
return NGX_ERROR;
}
ngx_mutex_lock(ngx_posted_events_mutex);
for (i = 0; i < events; i++) {
fd = event_list[i].fd;
revents = event_list[i].revents;
c = ngx_cycle->files[fd];
if (c == NULL || c->fd == -1) {
pfd.fd = fd;
pfd.events = 0;
pfd.revents = 0;
rc = ioctl(dp, DP_ISPOLLED, &pfd);
switch (rc) {
case -1:
ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
"ioctl(DP_ISPOLLED) failed for socket %d, event %04Xd",
fd, revents);
break;
case 0:
ngx_log_error(NGX_LOG_ALERT, cycle->log, 0,
"phantom event %04Xd for closed and removed socket %d",
revents, fd);
break;
default:
ngx_log_error(NGX_LOG_ALERT, cycle->log, 0,
"unexpected event %04Xd for closed and removed socket %d, ",
"ioctl(DP_ISPOLLED) returned rc:%d, fd:%d, event %04Xd",
revents, fd, rc, pfd.fd, pfd.revents);
pfd.fd = fd;
pfd.events = POLLREMOVE;
pfd.revents = 0;
if (write(dp, &pfd, sizeof(struct pollfd))
!= (ssize_t) sizeof(struct pollfd))
{
ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
"write(/dev/poll) for %d failed", fd);
}
if (close(fd) == -1) {
ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
"close(%d) failed", fd);
}
break;
}
continue;
}
ngx_log_debug3(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
"devpoll: fd:%d, ev:%04Xd, rev:%04Xd",
fd, event_list[i].events, revents);
if (revents & (POLLERR|POLLHUP|POLLNVAL)) {
ngx_log_debug3(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
"ioctl(DP_POLL) error fd:%d ev:%04Xd rev:%04Xd",
fd, event_list[i].events, revents);
}
if (revents & ~(POLLIN|POLLOUT|POLLERR|POLLHUP|POLLNVAL)) {
ngx_log_error(NGX_LOG_ALERT, cycle->log, 0,
"strange ioctl(DP_POLL) events "
"fd:%d ev:%04Xd rev:%04Xd",
fd, event_list[i].events, revents);
}
if ((revents & (POLLERR|POLLHUP|POLLNVAL))
&& (revents & (POLLIN|POLLOUT)) == 0)
{
/*
* if the error events were returned without POLLIN or POLLOUT,
* then add these flags to handle the events at least in one
* active handler
*/
revents |= POLLIN|POLLOUT;
}
rev = c->read;
if ((revents & POLLIN) && rev->active) {
if ((flags & NGX_POST_THREAD_EVENTS) && !rev->accept) {
rev->posted_ready = 1;
} else {
rev->ready = 1;
}
if (flags & NGX_POST_EVENTS) {
queue = (ngx_event_t **) (rev->accept ?
&ngx_posted_accept_events : &ngx_posted_events);
ngx_locked_post_event(rev, queue);
} else {
instance = rev->instance;
rev->handler(rev);
if (c->fd == -1 || rev->instance != instance) {
continue;
}
}
}
wev = c->write;
if ((revents & POLLOUT) && wev->active) {
if (flags & NGX_POST_THREAD_EVENTS) {
wev->posted_ready = 1;
} else {
wev->ready = 1;
}
if (flags & NGX_POST_EVENTS) {
ngx_locked_post_event(wev, &ngx_posted_events);
} else {
wev->handler(wev);
}
}
}
ngx_mutex_unlock(ngx_posted_events_mutex);
return NGX_OK;
}
static mrb_value ngx_http_mruby_update(mrb_state *mrb, mrb_value self)
{
ngx_time_update();
return self;
}
