Hi,
I have some C native code that calls a logging class written in Ruby. To
pass the message string to the Ruby class, I am creating a string with
rb_str_new2 and then passing its VALUE to rb_funcall. I am wondering if I
need to do any clean-up for the string, or will Ruby handle this for me?
Also, if anyone can suggest an awesome doc on writing Ruby native
extensions, that would be appreciated. At the moment, I am mostly using the
Pickaxe online book.
Here is the code in question:
void log_warning(const char *fmt, ...)
{
char message[BUFFER_LEN]; // Temporary buffer to hold the generated
message
// Evaluate the format string and store it in the temporary buffer
va_list ap;
va_start(ap, fmt);
vsnprintf(message, BUFFER_LEN, fmt, ap);
va_end(ap);
// Find the ID's to call tho Log.warning Ruby class method
rb_require("log");
ID log_class = rb_path2class("Log");
ID log_warning_method = rb_intern("warning");
// Create a Ruby string containing a copy of the formatted message
VALUE message_value = rb_str_new2(message);
// Call Log.warning, with the formatted message as an argument
rb_funcall(log_class, log_warning_method, 1, message_value);
// Do I need to do anything here to tell Ruby to clean up the
string?
}
Thanks!
-Steven