40 lines
		
	
	
		
			511 B
		
	
	
	
		
			Go
		
	
	
	
	
	
			
		
		
	
	
			40 lines
		
	
	
		
			511 B
		
	
	
	
		
			Go
		
	
	
	
	
	
| package grace
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| 
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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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| 
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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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| 
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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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| 			case string:
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| 				err = errors.New(x)
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| 			case error:
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| 				err = x
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| 			default:
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| 				err = errors.New("Unknown panic")
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| 			}
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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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