NSLog macro to print out if it is on the main thread

Question

My current DEB_LOG macro extends NSLog to also print out the object, method, and line where it is being logged:

#define DEB_LOG(__FORMAT__,...) NSLog((@"%s line %d $ " __FORMAT__), __PRETTY_FUNCTION__, __LINE__, ##__VA_ARGS__)

---

I would also like to expand it to report if it is on the main thread, if possible.

[NSThread isMainThread]

Is that possible?

Answer 1

This should do it:

#define DEB_LOG(__FORMAT__,...) NSLog((@"%s line %d%s $ " __FORMAT__), \
    __PRETTY_FUNCTION__, __LINE__, \
    ([NSThread isMainThread] ? " (main thread)" : ""), \
    ##__VA_ARGS__)

The output generated from

DEB_LOG(@"%@", @"Hello world");

is

-[AppDelegate application:didFinishLaunchingWithOptions:] line 20 (main thread) $ Hello world