source: tests/concurrent/suspend_then.cfa@ def751f

#include <fstream.hfa>
#include <kernel.hfa>
#include <thread.hfa>
#include <time.hfa>
#include <stdlib.hfa>
#include <string.h>

#define __kick_rate 150000ul
#include "long_tests.hfa"

Duration default_preemption() {
        return 0;
}

#ifdef TEST_LONG
static const unsigned long N = 600_000ul;
#else
static const unsigned long N = 1_000ul;
#endif

#if !defined(TEST_FOREVER)
        static inline void print(const char * const text ) {
                write( STDOUT_FILENO, text, strlen(text) );
        }
#else
        static inline void print(Printer & this, const char * const text ) {}
#endif

generator Coroutine { int i; };

volatile bool done = false;
Coroutine * volatile the_cor = 0p;

void store(Coroutine & cor) {
        __atomic_store_n(&the_cor, &cor, __ATOMIC_SEQ_CST);
}

Coroutine * take(void) {
        Coroutine * val = 0p;
        Coroutine * ret = __atomic_exchange_n(&the_cor, val, __ATOMIC_SEQ_CST);
        assert(!ret || !the_cor);
        return ret;
}

void main(Coroutine& this) {
        this.i = 0;
        suspend;
        for(;TEST(this.i < N); this.i++) {

                print("C - Suspending\n");
                suspend{
                        print("C - Publishing\n");
                        assert(!the_cor);
                        store( this );
                }
                assert(!the_cor);
                print("C - Back\n");
                KICK_WATCHDOG;
                yield();
        }
        done = true;
        suspend;
}

thread Thread {};
void main(Thread & this) {
        Coroutine * mine = 0p;
        while(!done) {
                yield();

                mine = take();
                if(!mine) continue;

                print("T - took\n");
                resume(*mine);
        }
}


int main(int argc, char* argv[]) {
        processor p[2];
        Coroutine c;
        resume(c); // Prime the coroutine to avoid one of the threads being its starter
        the_cor = &c;
        {
                Thread t[2];
        }
}