gob on structure having mutex

[suraj]

Hi, 

Gob encoding for below structure does not work :

type A struct {

  sync.RWMutex

  ID       int 

  Value string 

} 

because sync.RWMutex does not have any exported field.

If I do:

type A struct {

  lock sync.RWMutex

  ID       int 

  Value string

}

now it works, as lock is a private field.

But then I have to do A.lock.Lock(), which doesn't sound very correct. 

Other approach can be :

type B struct {

   A

   sync.RWMutex

}

Can you please tell me if there is a better approach to this? As both look difficult to justify, unless you know its due to requirement of gob encoding.

[Dan Kortschak]

Add a Lock/Unlock pair of methods to A that call the methods on A.lock?

[Larry Clapp]

The "Example (EncodeDecode)" in the encoding/gob documentation has an example which encodes & decodes unexported fields.  You should be able to use that to figure out how to encode & decode your type A while ignoring the RWMutex.

-- L