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Use level-triggered events for listening stream sockets.

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The limit of 20 accepted connections per event invocation can otherwise lead to no more connections being accepted when more that 20 connections are available at a time. This is an adaptation of @Boris-Barboris pull request #21 to restrict the level triggered behavior to listening sockets. See also #20.
This commit is contained in:
Sönke Ludwig 2017-09-02 00:11:34 +02:00
parent eb595ef858
commit fc5df2f949
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5 changed files with 20 additions and 17 deletions
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17
source/eventcore/drivers/posix/kqueue.d
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@ -86,12 +86,13 @@ final class KqueueEventLoop : PosixEventLoop {
close(m_queue);
}
override void registerFD(FD fd, EventMask mask)
override void registerFD(FD fd, EventMask mask, bool edge_triggered = true)
{
//print("register %s %s", fd, mask);
kevent_t ev;
ev.ident = fd;
ev.flags = EV_ADD|EV_CLEAR|EV_ENABLE;
ev.flags = EV_ADD|EV_ENABLE;
if (edge_triggered) ev.flags |= EV_CLEAR;
if (mask & EventMask.read) {
ev.filter = EVFILT_READ;
m_changes ~= ev;
@ -111,21 +112,23 @@ final class KqueueEventLoop : PosixEventLoop {
m_changes ~= ev;
}
override void updateFD(FD fd, EventMask old_mask, EventMask new_mask)
override void updateFD(FD fd, EventMask old_mask, EventMask new_mask, bool edge_triggered = true)
{
//print("update %s %s", fd, mask);
kevent_t ev;
auto changes = old_mask ^ new_mask;
if (changes & EventMask.read) {
ev.filter = EVFILT_READ;
ev.flags = EV_CLEAR | (new_mask & EventMask.read ? EV_ADD : EV_DELETE);
ev.flags = new_mask & EventMask.read ? EV_ADD : EV_DELETE;
if (edge_triggered) ev.flags |= EV_CLEAR;
m_changes ~= ev;
}
if (changes & EventMask.write) {
ev.filter = EVFILT_WRITE;
ev.flags = EV_CLEAR | (new_mask & EventMask.write ? EV_ADD : EV_DELETE);
ev.flags = new_mask & EventMask.write ? EV_ADD : EV_DELETE;
if (edge_triggered) ev.flags |= EV_CLEAR;
m_changes ~= ev;
}