NAG Library Routine Document

x10bb_a1w_f (callback_insert_a1w)

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Purpose

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Specification

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Description

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References

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Arguments

1:     $\mathbf{cb\_handle}$ – Type (c_ptr)Input

On entry: a handle to the callback data object as created by a prior call to x10ba_a1w_f.

2:     $\mathbf{cb\_loc}$ – Type (c_funptr)Input

On entry: the location of the user-supplied AD symbolic callback as returned by the intrinsic c_funloc with the callback name the same as the argument.

3:     $\mathbf{ifail}$ – IntegerInput/Output

On entry: ifail must be set to $0$, $-1\text{ or }1$. If you are unfamiliar with this argument you should refer to Section 3.4 in How to Use the NAG Library and its Documentation for details.

For environments where it might be inappropriate to halt program execution when an error is detected, the value $-1\text{ or }1$ is recommended. If the output of error messages is undesirable, then the value $1$ is recommended. Otherwise, if you are not familiar with this argument, the recommended value is $0$. When the value $-\mathbf{1}\text{ or }\mathbf{1}$ is used it is essential to test the value of ifail on exit.

On exit: $\mathbf{ifail}=\mathbf{0}$ unless the routine detects an error or a warning has been flagged (see Section 6).

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Error Indicators and Warnings

$\mathbf{ifail}=1$

On entry, cb_handle does not define a valid handle to a NAG AD callback data object. It has not been initialized or has been corrupted.

$\mathbf{ifail}=-99$

An unexpected error has been triggered by this routine. Please contact NAG.

See Section 3.9 in How to Use the NAG Library and its Documentation for further information.

$\mathbf{ifail}=-399$

Your licence key may have expired or may not have been installed correctly.

See Section 3.8 in How to Use the NAG Library and its Documentation for further information.

$\mathbf{ifail}=-999$

Dynamic memory allocation failed.

See Section 3.7 in How to Use the NAG Library and its Documentation for further information.

7

Accuracy

8

Parallelism and Performance

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Further Comments

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Example