Smalltalk - Thread safe

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Thread safe

Sreenath G K

2006-02-02, 4:00 am

Hi all,

I am working in Visualworks 7.3.1.Is it possible to make a global variable
thread safe like "synchronise" in java.
Thanks in advance.

Sreenath

David Buck

2006-02-02, 7:59 am

Sreenath G K wrote:
> Hi all,
>
> I am working in Visualworks 7.3.1.Is it possible to make a global variable
> thread safe like "synchronise" in java.
> Thanks in advance.
>
> Sreenath

You would a class instance variable containing a semaphore and use the
critical: method to protect your code.

Eg.

instance method of MyClass:

writeToFile: someData
self class mySemaphore critical: [
someData writeToFile]

class method of MyClass

mySemaphore
^semaphore

initialize
semaphore := Semaphore forMutualExclusion

David Buck
Simberon Inc.
www.simberon.com

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