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gsocket windows: check event before calling WSAEnumNetworkEvents

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The WSAEnumNetworkEvents API is called every time the socket
needs to be checked for status changes. Doing this in an application
with several sockets could generate a high cpu usage since
this call is done for each socket at each iteration of the main loop.
Since there is also a WSAEvent that gets signaled when there is
a change in the status of the socket, checking its status and
calling the WSAEnumNetworkEvents API only if the event is signaled,
can reduce the overall cpu usage.
This commit is contained in:
Silvio Lazzeretti 2024-08-22 09:16:34 +02:00 committed by Silvio Lazzeretti
parent c09ffca226
commit cfdb60d11d
1 changed files with 2 additions and 3 deletions
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5
gio/gsocket.c
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@ -4107,9 +4107,8 @@ update_condition_unlocked (GSocket *socket)
GIOCondition condition; GIOCondition condition;
if (!socket->priv->closed && if (!socket->priv->closed &&
WSAEnumNetworkEvents (socket->priv->fd, (WSAWaitForMultipleEvents (1, &socket->priv->event, FALSE, 0, FALSE) == WSA_WAIT_EVENT_0) &&
socket->priv->event, (WSAEnumNetworkEvents (socket->priv->fd, socket->priv->event, &events) == 0))
&events) == 0)
{ {
socket->priv->current_events |= events.lNetworkEvents; socket->priv->current_events |= events.lNetworkEvents;
if (events.lNetworkEvents & FD_WRITE && if (events.lNetworkEvents & FD_WRITE &&