Is there documentation about Pointer behavior liveliness?

[nugend]

I was encountering an error where invoking p.getString(0) was returning a value of "I". Eventually I realized that the problem was that I was trying to access the Pointer outside of the function context that my pointer had been returned in. I can see why this would be a problem in retrospect, but I don't recall reading anything about Pointer liveliness when I read through the documentation.

Thanks.

[twall]

Aside from primitive array parameters having a “liveliness” scope of the native function call, there’s nothing JNA-specific about that sort of data validity.

Some functions may return heap-allocated memory, some may return statically-allocated memory, some may even (dangerously) return stack-based memory.

The Pointer itself merely represents a native address, and makes no guarantees about its validity or lifecycle.

On Dec 20, 2013, at 7:25 PM, Daniel Nugent [email protected] wrote:

I was encountering an error where invoking p.getString(0) was returning a value of "I". Eventually I realized that the problem was that I was trying to access the Pointer outside of the function context that my pointer had been returned in. I can see why this would be a problem in retrospect, but I don't recall reading anything about Pointer liveliness when I read through the documentation.

Thanks.

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