C++ - How to write to files in an Apache module? - c++

Question

I have the following code, in C++ (in Ubuntu 16.04) for an Apache HTTP Server module.
I would like to write some debug to logs (using std::ofstream), but I don't see anything. Neither the logs, or the files.
I've also tried to use one of the multiple log routines that apache already has on the http_log.h, such as the one below ap_log_pid, but I see nothing being written.
How can I write some debug logs to a file, in an Apache module?
#include <httpd.h>
#include <http_log.h>
#include <http_core.h>
#include <http_protocol.h>
#include <http_request.h>
#include <apr_strings.h>
#include <iostream>
#include <fstream>
void write_something_to_a_file() // <---- DOESN'T WRITE TO FILE!
{
std::ofstream myfile;
myfile.open ("//home//myubuntu//myubuntu//textfile_1.txt");
myfile << "Writing this to a file.\n";
myfile.close();
}
static int myserver_handler(request_rec *r)
{
write_something_to_a_file(); // <-- DOESN'T WORK :(
ap_log_pid(p, "//home//myubuntu//myubuntu//textfile_2.txt"); //<-- DOESN'T WORK
return OK;
}
static void register_hooks(apr_pool_t *pool)
{
ap_hook_handler(myserver_handler, NULL, NULL, APR_HOOK_LAST);
}
module AP_MODULE_DECLARE_DATA myserver_module =
{
STANDARD20_MODULE_STUFF,
NULL,
NULL,
NULL,
NULL,
NULL,
register_hooks
};