Function stumpless_get_param_value 

pub unsafe extern "C" fn stumpless_get_param_value(
    param: *const stumpless_param,
) -> *const c_char

Returns the value of the given param. The character buffer must be freed by the caller when it is no longer needed to avoid memory leaks.

In versions prior to v2.0.0, the returned pointer was to the internal buffer used to store the value and was not to be modified by the caller. This behavior changed in v2.0.0 in order to avoid thread safety issues.

Thread Safety: MT-Safe This function is thread safe. A mutex is used to coordinate the read of the param with other accesses and modifications.

Async Signal Safety: AS-Unsafe lock heap This function is not safe to call from signal handlers due to the use of a non-reentrant lock to coordinate access and the use of memory management functions to create the result.

Async Cancel Safety: AC-Unsafe lock heap This function is not safe to call from threads that may be asynchronously cancelled, due to the use of a lock that could be left locked as well as memory management functions.

@since release v1.6.0

@param param The param to get the value from.

@return The value of param, if no error is encountered. If an error is encountered, then NULL is returned and an error code is set appropriately.