/*static */
void worker_main(void *arg)
{
ap_listen_rec *lr, *first_lr, *last_lr = NULL;
apr_pool_t *ptrans;
apr_allocator_t *allocator;
apr_bucket_alloc_t *bucket_alloc;
conn_rec *current_conn;
apr_status_t stat = APR_EINIT;
ap_sb_handle_t *sbh;
apr_thread_t *thd = NULL;
apr_os_thread_t osthd;
int my_worker_num = (int)arg;
apr_socket_t *csd = NULL;
int requests_this_child = 0;
apr_socket_t *sd = NULL;
fd_set main_fds;
int sockdes;
int srv;
struct timeval tv;
int wouldblock_retry;
osthd = apr_os_thread_current();
apr_os_thread_put(&thd, &osthd, pmain);
tv.tv_sec = 1;
tv.tv_usec = 0;
apr_allocator_create(&allocator);
apr_allocator_max_free_set(allocator, ap_max_mem_free);
apr_pool_create_ex(&ptrans, pmain, NULL, allocator);
apr_allocator_owner_set(allocator, ptrans);
apr_pool_tag(ptrans, "transaction");
bucket_alloc = apr_bucket_alloc_create_ex(allocator);
atomic_inc (&worker_thread_count);
while (!die_now) {
/*
* (Re)initialize this child to a pre-connection state.
*/
current_conn = NULL;
apr_pool_clear(ptrans);
if ((ap_max_requests_per_child > 0
&& requests_this_child++ >= ap_max_requests_per_child)) {
DBPRINT1 ("\n**Thread slot %d is shutting down", my_worker_num);
clean_child_exit(0, my_worker_num, ptrans, bucket_alloc);
}
ap_update_child_status_from_indexes(0, my_worker_num, WORKER_READY,
(request_rec *) NULL);
/*
* Wait for an acceptable connection to arrive.
*/
for (;;) {
if (shutdown_pending || restart_pending || (ap_scoreboard_image->servers[0][my_worker_num].status == WORKER_IDLE_KILL)) {
DBPRINT1 ("\nThread slot %d is shutting down\n", my_worker_num);
clean_child_exit(0, my_worker_num, ptrans, bucket_alloc);
}
/* Check the listen queue on all sockets for requests */
memcpy(&main_fds, &listenfds, sizeof(fd_set));
srv = select(listenmaxfd + 1, &main_fds, NULL, NULL, &tv);
if (srv <= 0) {
if (srv < 0) {
ap_log_error(APLOG_MARK, APLOG_NOTICE, 0, ap_server_conf, APLOGNO(00217)
"select() failed on listen socket");
apr_thread_yield();
}
continue;
}
/* remember the last_lr we searched last time around so that
we don't end up starving any particular listening socket */
if (last_lr == NULL) {
lr = ap_listeners;
}
else {
lr = last_lr->next;
if (!lr)
lr = ap_listeners;
}
first_lr = lr;
do {
apr_os_sock_get(&sockdes, lr->sd);
if (FD_ISSET(sockdes, &main_fds))
goto got_listener;
lr = lr->next;
if (!lr)
lr = ap_listeners;
} while (lr != first_lr);
/* if we get here, something unexpected happened. Go back
into the select state and try again.
*/
continue;
got_listener:
last_lr = lr;
sd = lr->sd;
wouldblock_retry = MAX_WB_RETRIES;
while (wouldblock_retry) {
if ((stat = apr_socket_accept(&csd, sd, ptrans)) == APR_SUCCESS) {
break;
}
else {
/* if the error is a wouldblock then maybe we were too
quick try to pull the next request from the listen
queue. Try a few more times then return to our idle
listen state. */
if (!APR_STATUS_IS_EAGAIN(stat)) {
break;
}
if (wouldblock_retry--) {
apr_thread_yield();
}
}
}
/* If we got a new socket, set it to non-blocking mode and process
it. Otherwise handle the error. */
if (stat == APR_SUCCESS) {
apr_socket_opt_set(csd, APR_SO_NONBLOCK, 0);
#ifdef DBINFO_ON
if (wouldblock_retry < MAX_WB_RETRIES) {
retry_success++;
avg_retries += (MAX_WB_RETRIES-wouldblock_retry);
}
#endif
break; /* We have a socket ready for reading */
}
else {
#ifdef DBINFO_ON
if (APR_STATUS_IS_EAGAIN(stat)) {
would_block++;
retry_fail++;
}
else if (
#else
if (APR_STATUS_IS_EAGAIN(stat) ||
#endif
APR_STATUS_IS_ECONNRESET(stat) ||
APR_STATUS_IS_ETIMEDOUT(stat) ||
APR_STATUS_IS_EHOSTUNREACH(stat) ||
APR_STATUS_IS_ENETUNREACH(stat)) {
;
}
#ifdef USE_WINSOCK
else if (APR_STATUS_IS_ENETDOWN(stat)) {
/*
* When the network layer has been shut down, there
* is not much use in simply exiting: the parent
* would simply re-create us (and we'd fail again).
* Use the CHILDFATAL code to tear the server down.
* @@@ Martin's idea for possible improvement:
* A different approach would be to define
* a new APEXIT_NETDOWN exit code, the reception
* of which would make the parent shutdown all
* children, then idle-loop until it detected that
* the network is up again, and restart the children.
* Ben Hyde noted that temporary ENETDOWN situations
* occur in mobile IP.
*/
ap_log_error(APLOG_MARK, APLOG_EMERG, stat, ap_server_conf, APLOGNO(00218)
"apr_socket_accept: giving up.");
clean_child_exit(APEXIT_CHILDFATAL, my_worker_num, ptrans,
bucket_alloc);
}
#endif
else {
ap_log_error(APLOG_MARK, APLOG_ERR, stat, ap_server_conf, APLOGNO(00219)
"apr_socket_accept: (client socket)");
clean_child_exit(1, my_worker_num, ptrans, bucket_alloc);
}
}
}
ap_create_sb_handle(&sbh, ptrans, 0, my_worker_num);
/*
* We now have a connection, so set it up with the appropriate
* socket options, file descriptors, and read/write buffers.
*/
current_conn = ap_run_create_connection(ptrans, ap_server_conf, csd,
my_worker_num, sbh,
bucket_alloc);
if (current_conn) {
current_conn->current_thread = thd;
ap_process_connection(current_conn, csd);
ap_lingering_close(current_conn);
}
request_count++;
}
clean_child_exit(0, my_worker_num, ptrans, bucket_alloc);
}
/*
* worker_main()
* Main entry point for the worker threads. Worker threads block in
* win*_get_connection() awaiting a connection to service.
*/
static DWORD __stdcall worker_main(void *thread_num_val)
{
apr_thread_t *thd;
apr_os_thread_t osthd;
static int requests_this_child = 0;
winnt_conn_ctx_t *context = NULL;
int thread_num = (int)thread_num_val;
ap_sb_handle_t *sbh;
apr_bucket *e;
int rc;
conn_rec *c;
apr_int32_t disconnected;
osthd = apr_os_thread_current();
while (1) {
ap_update_child_status_from_indexes(0, thread_num, SERVER_READY, NULL);
/* Grab a connection off the network */
context = winnt_get_connection(context);
if (!context) {
/* Time for the thread to exit */
break;
}
/* Have we hit MaxConnectionsPerChild connections? */
if (ap_max_requests_per_child) {
requests_this_child++;
if (requests_this_child > ap_max_requests_per_child) {
SetEvent(max_requests_per_child_event);
}
}
e = context->overlapped.Pointer;
ap_create_sb_handle(&sbh, context->ptrans, 0, thread_num);
c = ap_run_create_connection(context->ptrans, ap_server_conf,
context->sock, thread_num, sbh,
context->ba);
if (!c)
{
/* ap_run_create_connection closes the socket on failure */
context->accept_socket = INVALID_SOCKET;
if (e)
apr_bucket_free(e);
continue;
}
thd = NULL;
apr_os_thread_put(&thd, &osthd, context->ptrans);
c->current_thread = thd;
/* follow ap_process_connection(c, context->sock) logic
* as it left us no chance to reinject our first data bucket.
*/
ap_update_vhost_given_ip(c);
rc = ap_run_pre_connection(c, context->sock);
if (rc != OK && rc != DONE) {
c->aborted = 1;
}
if (e && c->aborted)
{
apr_bucket_free(e);
}
else
{
ap_set_module_config(c->conn_config, &mpm_winnt_module, context);
}
if (!c->aborted)
{
ap_run_process_connection(c);
apr_socket_opt_get(context->sock, APR_SO_DISCONNECTED,
&disconnected);
if (!disconnected) {
context->accept_socket = INVALID_SOCKET;
ap_lingering_close(c);
}
}
}
ap_update_child_status_from_indexes(0, thread_num, SERVER_DEAD,
(request_rec *) NULL);
return 0;
}