Function dr_get_config_dir 

pub unsafe extern "C" fn dr_get_config_dir(
    global: bool_,
    alternative_local: bool_,
    config_dir: *mut c_char,
    config_dir_sz: usize,
) -> dr_config_status_t

Returns in \p config_dir the configuration directory used to store config files. In order to use local config files when the normal interactive user home directory environment variable (HOME on Linux or MacOS; USERPROFILE on Windows) is not set and when using one-step configure-and-run, call this routine prior to creating the child process and pass true for \p alternative_local. For multi-step, the caller must set the DYNAMORIO_CONFIGDIR environment variable (in the child process) to point at the resulting \p config_dir.

\param[in] global Whether to use global or user-local config files. On Windows, global config files are stored in a dir pointed at by the DYNAMORIO_HOME registry key. On Linux, they are in /etc/dynamorio. Administrative privileges may be needed if global is true. Note that DynamoRIO gives local config files precedence when both exist. The caller must separately create the global directory.

\param[in] alternative_local Whether to locate a temporary directory to use for user-local config files and to set the DYNAMORIO_CONFIGDIR environment variable to point at it, if the regular local config dir is not found.

\param[out] config_dir Receives the full path to the config dir.

\param[in] config_dir_sz The capacity, in characters, of \p config_dir.

\return A dr_config_status_t code indicating the result of the request.