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Added a back-up in case of more than 64 connections.

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OndraCo 2016-06-16 13:02:20 +08:00 • committed by Andy Green
parent 3f17a8e252
commit 528adbde7f
1 changed files with 54 additions and 2 deletions
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56
lib/lws-plat-win.c
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@ -153,6 +153,58 @@ LWS_VISIBLE void lwsl_emit_syslog(int level, const char *line)
lwsl_emit_stderr(level, line);
}
LWS_VISIBLE DWORD
lws_plat_wait_event(struct lws_context_per_thread* pt, int timeout)
{
int event_count = pt->fds_count + 1;
HANDLE* events = pt->events;
DWORD ev;
// the WSAWaitForMultipleEvents can wait for maximum of 64 handles
if(event_count <= WSA_MAXIMUM_WAIT_EVENTS)
{
return ev = WSAWaitForMultipleEvents(event_count, events,
FALSE, timeout, FALSE);
}
else
{
// back-up solution
// this is really ugly and introduces unneeded latency / unfairness
// but still better than the current crash
int timeout_left = timeout;
// the smaller step the closer we get to the valid solution
// and the more CPU we will use
int timeout_step = (timeout > 10) ? 10 : timeout;
while(timeout_left > 0)
{
int events_left = event_count;
int events_handled = 0;
while(events_left > 0)
{
// split to groups to size of max 64
int events_to_handle = (events_left > WSA_MAXIMUM_WAIT_EVENTS) ?
WSA_MAXIMUM_WAIT_EVENTS :
events_left;
ev = WSAWaitForMultipleEvents(events_to_handle, &events[events_handled],
FALSE, timeout_step, FALSE);
if(ev != WSA_WAIT_TIMEOUT)
return ev + events_handled;
timeout_left -= timeout_step;
events_handled += events_to_handle;
events_left -= events_to_handle;
}
}
}
return WSA_WAIT_TIMEOUT;
}
LWS_VISIBLE int
lws_plat_service_tsi(struct lws_context *context, int timeout_ms, int tsi)
{
@ -206,8 +258,8 @@ lws_plat_service_tsi(struct lws_context *context, int timeout_ms, int tsi)
/* if we know something needs service already, don't wait in poll */
timeout_ms = lws_service_adjust_timeout(context, timeout_ms, tsi);
ev = WSAWaitForMultipleEvents(pt->fds_count + 1, pt->events,
FALSE, timeout_ms, FALSE);
ev = lws_plat_wait_event(pt, timeout_ms);
context->service_tid = 0;
if (ev == WSA_WAIT_TIMEOUT) {