I've encountered strange behavior in a script, where I read and write to the same variable repeatably and rapidly. It seems the issue is that the read operation happens before the previous write finishes, and I get errors. Example code:

my @array = ( some values );

While ( my_condition ) {
$buffer = $array[0];
$array[0] = new_value;

mytestfunc(\@array);

$array[0] = $buffer;
}

[download]

Before long, $array[0] != $buffer. But, if I change the code to the following, my errors disappear.

While ( my_condition ) {
$buffer = $array[0];
$array[0] = new_value;

mytestfunc(\@array);

$array[0] = $buffer while ($array[0] != $buffer);
}

[download]

Is there a better way to handle this issue? Thanks for the wisdom and advice.

Jeff

In reply to volatile memory? by Anonymous Monk

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