source: src/tests/sched-int-disjoint.c @ 58cb21c

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

#define N 100_000

enum state_t { WAIT, SIGNAL, BARGE };

monitor global_t {};
global_t mut;

monitor global_data_t;
void ?{}( global_data_t * this );
void ^?{} ( global_data_t * this );

monitor global_data_t {
        int counter;
        state_t state;
} data;

condition cond;

volatile bool all_done;

void ?{}( global_data_t * this ) {
        this->counter == 0;
        this->state = BARGE;
}

void ^?{} ( global_data_t * this ) {}

//------------------------------------------------------------------------------
// Barging logic
void barge( global_data_t * mutex d ) {
        d->state = BARGE;
}

thread Barger {};

void main( Barger * this ) {
        while( !all_done ) { 
                barge( &data );
                yield(); 
        }
}

//------------------------------------------------------------------------------
// Waiting logic
bool wait( global_t * mutex m, global_data_t * mutex d ) {
        wait( &cond );
        if( d->state != SIGNAL ) {
                sout | "ERROR barging!" | endl; 
        }

        d->counter++;

        if( (d->counter % 1000) == 0 ) sout | d->counter | endl;

        return d->counter < N;
}

thread Waiter {};

void main( Waiter * this ) {
        while( wait( &mut, &data ) ) { yield(); }
}


//------------------------------------------------------------------------------
// Signalling logic
void signal( condition * cond, global_t * mutex a, global_data_t * mutex b ) {
        b->state = SIGNAL;
        signal( cond );
}

void logic( global_t * mutex a ) {
        signal( &cond, a, &data );

        int pauses = (unsigned)rand48() % 10;
        for(int i = 0; i < pauses; i++) {
                yield();
        }

        //This is technically a mutual exclusion violation but the mutex monitor protects us
        bool running = data.counter < N && data.counter > 0;
        if( data.state != SIGNAL && running ) {
                sout | "ERROR Eager signal" | data.state | endl; 
        }
}

thread Signaller {};

void main( Signaller * this ) {
        while( !all_done ) { 
                logic( &mut );
                yield(); 
        }
}

//------------------------------------------------------------------------------
// Main loop
int main(int argc, char* argv[]) {
        all_done = false;
        processor p;
        {
                Signaller s;
                Barger b[17];
                {
                        Waiter w[4];
                }
                sout | "All waiter done" | endl;
                all_done = true;
        }       
}