// #define _GNU_SOURCE         /* See feature_test_macros(7) */

#include <stdarg.h>
#include <execinfo.h>
#include <sys/types.h>
#include <unistd.h>
#include <sys/syscall.h>

#include "modelbahn.h"

#define DEBUG_FILE "/tmp/modelbahn-server.log"
int _debuglevel = 0xff;

pid_t gettid();

void debug (int type, char *fmt,...) {
	va_list args;
	char text1[DEBUG_TEXT1LEN];
	char text2[DEBUG_TEXT2LEN];
	pid_t pid = gettid();

	va_start (args, fmt);
		vsnprintf (text1, (DEBUG_TEXT1LEN-1), fmt, args);
		va_end (args);
	text1[DEBUG_TEXT1LEN-1] = 0;
	text2[DEBUG_TEXT2LEN-1] = 0;

	if (type > 0) snprintf (text2, DEBUG_TEXT2LEN-1, "(%d)%d: %s", pid, type, text1);
	else snprintf (text2, DEBUG_TEXT2LEN-1, "(%d) %s", pid, text1);

	if (type == 0 || (type & _debuglevel) != 0) {
		FILE *f;
		printf ("%s\n", text2);
		f= fopen(DEBUG_FILE, "a");
		if (f) {
			fprintf (f, "%s\n", text2);
			fclose (f);
		}
	}
};


/*******************************************************************************************
 * helper stuff
 *******************************************************************************************/


//
// return the current thread process id
//
pid_t gettid() {
	pid_t tid = 0;
	tid = syscall(SYS_gettid);
	return tid;
};