dekker.c

int run[] = { 0, 0 };
int turn = 0;

/**
 * Function to enter critical section.
 */
void enterCriticalSection_dekker(int threadId)
{
	run[threadId] = 1;
	while ( run[1 - threadId] != 0 ) {
		if ( turn == (1 - threadId) ) {
			run[threadId] = 0;
			while ( turn == (1 - threadId) ) {}
			run[threadId] = 1;
		}
	}
}

/**
 * Function to leave critical section.
 */
void leaveCriticalSection_dekker(int threadId)
{
	turn = (1 - threadId);
	run[threadId] = 0;
}