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Merge pull request #2717 from huwenbo/master
fix panic sync: negative WaitGroup counter
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commit
f2925978f1
@ -3,14 +3,17 @@ package grace
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import (
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"errors"
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"net"
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"sync"
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)
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type graceConn struct {
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net.Conn
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server *Server
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m sync.Mutex
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closed bool
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}
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func (c graceConn) Close() (err error) {
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func (c *graceConn) Close() (err error) {
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defer func() {
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if r := recover(); r != nil {
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switch x := r.(type) {
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@ -23,6 +26,14 @@ func (c graceConn) Close() (err error) {
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}
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}
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}()
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c.m.Lock()
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if c.closed {
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c.m.Unlock()
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return
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}
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c.server.wg.Done()
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c.closed = true
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c.m.Unlock()
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return c.Conn.Close()
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}
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@ -37,7 +37,7 @@ func (gl *graceListener) Accept() (c net.Conn, err error) {
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tc.SetKeepAlive(true)
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tc.SetKeepAlivePeriod(3 * time.Minute)
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c = graceConn{
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c = &graceConn{
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Conn: tc,
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server: gl.server,
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}
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