How Can I Safely Copy Go Strings to C char * Pointers Using CGO?

Copying Go Strings to C char * Pointers via CGO

In order to copy a Go string into a C char * pointer via CGO, it is essential to adhere to the correct syntax and follow the appropriate memory management guidelines.

Contrary to your initial approach, the proper method involves using the C.CString function to transform the Go string into a C string. This function allocates memory to store the C string:

cstr = C.CString(str)

It is important to note that while C.CString allocates memory for you, it does not handle the responsibility of freeing it. Therefore, it is your obligation to release this memory explicitly using a call to:

C.free(unsafe.Pointer(cstr))

By following these guidelines, you can safely and effectively copy Go strings into C char * pointers, enabling seamless interoperability between these languages in your CGO applications.

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