Name

ap_copy_array_hdr — create a copy of an array with copy-on-write

Synopsis

array_header *ap_copy_array_hdr(pool *p, const array_header *arr)

Copies the array arr into the pool p without immediately copying the array’s storage. If the array is extended with push_array, the original array is copied to the new array before the extension takes place. Returns a pointer to the new array.

There are at least two pitfalls with this function. First, if the array is not extended, its memory is destroyed when the original array is destroyed; second, any changes made to the original array may also affect the new array if they occur before the new array is extended.

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