pitrou commented on a change in pull request #8052:
URL: https://github.com/apache/arrow/pull/8052#discussion_r477293832
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File path: cpp/src/arrow/c/abi.h
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@@ -60,6 +60,31 @@ struct ArrowArray {
void* private_data;
};
+// EXPERIMENTAL
+struct ArrowArrayStream {
+ // Callback to get the stream type
+ // (will be the same for all arrays in the stream).
+ // Return value: 0 if successful, an `errno`-compatible error code otherwise.
+ int (*get_schema)(struct ArrowArrayStream*, struct ArrowSchema* out);
+ // Callback to get the next array
+ // (if no error and the array is released, the stream has ended)
+ // Return value: 0 if successful, an `errno`-compatible error code otherwise.
Review comment:
I don't know how to phrase it: it returns value that are `errno` error
codes (in case of error). A number of values are standard in C++:
https://en.cppreference.com/w/cpp/error/errno_macros
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