//---------------------------------------------------------
// Barging test
// Ensures that no barging can occur between :
//   - the frontend of the waitfor and the waited call
//   - the waited call and the backend of the waitfor
//---------------------------------------------------------

#include <fstream>
#include <kernel>
#include <monitor>
#include <stdlib>
#include <thread>

#include <stdbool.h>

static const unsigned long N = 5_000ul;

enum state_t { WAITFOR, CALL, BARGE };

monitor global_t {
	bool done;
	bool started;
	state_t state;
};

void ?{} ( global_t & this ) {
	this.done = false;
	this.started = false;
	this.state = BARGE;
}

void ^?{} ( global_t & mutex this ) {}

global_t global;

bool barge( global_t & mutex this ) {
	this.state = BARGE;
	return !this.done;
}

thread barger_t {};
void main( barger_t & this ) {
	yield();
	while( barge( global ) ) { yield(random( 10 )); }
}

bool do_call( global_t & mutex this ) {
	yield(random( 10 ));
	if( this.state != WAITFOR && !this.done && this.started ) {
		serr | "Barging before caller detected" | endl;
	}

	this.state = CALL;
	return !this.done;
}

thread caller_t {};
void main( caller_t & this ) {
	while( do_call(global) ) { yield(random( 10 )); }
}

void do_wait( global_t & mutex this ) {
	this.started = true;
	for( int i = 0; i < N; i++) {
		yield(random( 10 ));
		this.state = WAITFOR;
		waitfor(do_call, this) {
			sout | i | endl;
		}

		if( this.state != CALL ) {
			serr | "Barging after caller detected" | endl;
		}
	}

	this.done = true;
}

thread waiter_t{};
void main( waiter_t & this ) {
	do_wait(global);
}

int main() {
	sout | "Starting" | endl;
	{
		barger_t bargers[17];
		caller_t callers[7];
		waiter_t waiters;
	}
	sout | "Stopping" | endl;
}