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What is Re Entrant Program and what is Re entrancy

 
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nijugopalan

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Joined: 15 Oct 2005
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PostPosted: Thu Jul 20, 2006 10:21 am    Post subject: What is Re Entrant Program and what is Re entrancy
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WHAT IS RE ENTRANT PROGRAM. AND WHAT IS RE ENTRANCY
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Bharanidharan

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Joined: 20 Jun 2005
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Location: Chennai, India

PostPosted: Fri Jul 21, 2006 12:18 pm    Post subject: Re: What is Re Entrant Program and what is Re entrancy
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I think any manual (including IBM Principle of operations) would contain the details.
A re-entrant module is one which does not have self-modifying property. In other words, the code must not change itself and any data that must be modified must reside outside of the module. For example, if you wish to modify a working storage, it must be acquired from and handled outside your module.
However, you are free to change the values in any location outside your module eg. registers, external storage devices.
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