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Lock (Magic xpa 4.x)

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Created BySalesforce Service User
Approval Process StatusPublished
Objective
Description

Lock (Magic xpa 4.x)

Returns an evaluated expression that locks a resource.

Syntax:

Lock (resource, timeout)

Parameters:

resource – Any expression that returns an Alpha string. Its maximum length is 128.

timeout – the maximum wait time in seconds. A negative value equals an infinite wait.

Returns:

Number to indicate if lock was successful:

0 = Lock was successful.

1 = Resource is already locked by same session.

2 = Resource is locked by another user and the timeout has expired.

Note:

  • This function uses the Resource lock file to manage the locks.

  • A zero length string is a valid name. In case of a recursive lock, the user must issue an UnLock command for each Lock command to fully unlock the resource.

  • The function polls every 500 milliseconds.

See also:

The Online and Rich Client Samples projects (program TF08 and RTF08)

Reference
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