// Async/await in CIR

// First define the types/decls we must provide to the library:

​

typedef unsigned promise_id;

​

// Create a new unresolved promise

promise_id promise_new(void);

​

// Resolve promise

void promise_resolve(promise_id);

​

// Register promise completion callback

void promise_then(promise_id, void (*cb)(void *), void *);

​

// Now include the library

#include <cirasync.h>

​

// Other stuff we use but not strictly needed by cirasync

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// Returns a new promise that resolves after ms

promise_id wait_ms(int ms);

​

// Runs the event loop forever

void engine_run(void);

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static promise_id f(int ms) {

    promise_id p = wait_ms(ms);

    @await(p);

    puts("wait1 done");

    p = wait_ms(ms);

    @await(p);

    puts("wait2 done");

}

@asyncTransform(f);

​

int main(void) {

    f(1000);

    f(2000);

    engine_run();

    return 0;

}

​