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// Copyright (c) 2019 The Gnet Authors. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//go:build !poll_opt
// +build !poll_opt
package gnet
import (
"runtime"
"github.com/panjf2000/gnet/v2/internal/netpoll"
"github.com/panjf2000/gnet/v2/pkg/errors"
)
func (el *eventloop) activateMainReactor() error {
if el.engine.opts.LockOSThread {
runtime.LockOSThread()
defer runtime.UnlockOSThread()
}
err := el.poller.Polling(el.engine.accept)
if err == errors.ErrEngineShutdown {
el.engine.opts.Logger.Debugf("main reactor is exiting in terms of the demand from user, %v", err)
err = nil
} else if err != nil {
el.engine.opts.Logger.Errorf("main reactor is exiting due to error: %v", err)
}
el.engine.shutdown(err)
return err
}
func (el *eventloop) activateSubReactor() error {
if el.engine.opts.LockOSThread {
runtime.LockOSThread()
defer runtime.UnlockOSThread()
}
err := el.poller.Polling(func(fd int, ev uint32) error {
if c := el.connections.getConn(fd); c != nil {
// Don't change the ordering of processing EPOLLOUT | EPOLLRDHUP / EPOLLIN unless you're 100%
// sure what you're doing!
// Re-ordering can easily introduce bugs and bad side-effects, as I found out painfully in the past.
// We should always check for the EPOLLOUT event first, as we must try to send the leftover data back to
// the peer when any error occurs on a connection.
//
// Either an EPOLLOUT or EPOLLERR event may be fired when a connection is refused.
// In either case write() should take care of it properly:
// 1) writing data back,
// 2) closing the connection.
if ev&netpoll.OutEvents != 0 && !c.outboundBuffer.IsEmpty() {
if err := el.write(c); err != nil {
return err
}
}
if ev&netpoll.InEvents != 0 {
return el.read(c)
}
return nil
}
return nil
})
if err == errors.ErrEngineShutdown {
el.engine.opts.Logger.Debugf("event-loop(%d) is exiting in terms of the demand from user, %v", el.idx, err)
err = nil
} else if err != nil {
el.engine.opts.Logger.Errorf("event-loop(%d) is exiting due to error: %v", el.idx, err)
}
el.closeConns()
el.engine.shutdown(err)
return err
}
func (el *eventloop) run() error {
if el.engine.opts.LockOSThread {
runtime.LockOSThread()
defer runtime.UnlockOSThread()
}
err := el.poller.Polling(func(fd int, ev uint32) error {
if c := el.connections.getConn(fd); c != nil {
// Don't change the ordering of processing EPOLLOUT | EPOLLRDHUP / EPOLLIN unless you're 100%
// sure what you're doing!
// Re-ordering can easily introduce bugs and bad side-effects, as I found out painfully in the past.
// We should always check for the EPOLLOUT event first, as we must try to send the leftover data back to
// the peer when any error occurs on a connection.
//
// Either an EPOLLOUT or EPOLLERR event may be fired when a connection is refused.
// In either case write() should take care of it properly:
// 1) writing data back,
// 2) closing the connection.
if ev&netpoll.OutEvents != 0 && !c.outboundBuffer.IsEmpty() {
if err := el.write(c); err != nil {
return err
}
}
if ev&netpoll.InEvents != 0 {
return el.read(c)
}
return nil
}
return el.accept(fd, ev)
})
if err == errors.ErrEngineShutdown {
el.engine.opts.Logger.Debugf("event-loop(%d) is exiting in terms of the demand from user, %v", el.idx, err)
err = nil
} else if err != nil {
el.engine.opts.Logger.Errorf("event-loop(%d) is exiting due to error: %v", el.idx, err)
}
el.closeConns()
el.engine.shutdown(err)
return err
}
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