#include <Core/Core.h>
using namespace UPP;

struct mySharedData {
	int a,b;
	String c;
};

Mutex m;
mySharedData data;
Atomic threadnum;

//uncomment this to see how it ends up when not using mutex
//#define NOMUTEX

void ThreadFunction(){
	int thisthread=AtomicInc(threadnum); //thisthread serves as an unique identifier of thread, just for the sake of the examples clarity
	for(int i = 0; i < 10; i++){
		Thread::Sleep(Random(10)); // Pretend some work...
#ifndef NOMUTEX
		m.Enter();	    // Enter the section that accesses the shared data
#endif
		data.a++;
		data.c<<data.a<<": ";
		Thread::Sleep(20); //Let's pretend that some slow operation happens here (for example file access)
		data.b=data.a;
		data.c<<data.b<<" ["<<thisthread<<"]\n";
#ifndef NOMUTEX
		m.Leave();    // we don't need the exclusive access to data anymore, release the mutex
#endif
	}
}

CONSOLE_APP_MAIN {
	//initialize variables (no threads yet, so it is save to make it without mutex);
	threadnum=0;
	data.a=0;
	data.b=0;
	data.c="";
	
	// start the threads
	Thread::Start(callback(ThreadFunction));
	Thread::Start(callback(ThreadFunction));
	Thread::Start(callback(ThreadFunction));
	
	while(Thread::GetCount()); // the main thread should wait for other to finish, so we can see the results 
		Thread::Sleep(100);
	
	Cout()<<data.c<<"\n";
}