#ifndef GENERATOR_H
#define GENERATOR_H
#include "coroutine.h"
#include <stdbool.h>

typedef enum Generator_State {
    Generator_Running,
    Generator_Deleting,
    Generator_Complete
} Generator_State;

typedef struct Generator {
    Coroutine *coroutine;
    Coroutine *caller;
    void *(*start)(void *);
    void *param;
    Generator_State state;
} Generator;

extern void Generator_ctor(Generator *gen, size_t stack_size, void *(*start)(void *), void *param);
extern Generator *Generator_New(size_t stack_size, void *(*)(void *), void *);
extern void Generator_dtor(Generator *gen);
extern void Generator_Delete(Generator *);

// Returns true if generator yielded a value, false if generator is complete
// *value is set to generator's value (yield / return value from exit)
extern bool Generator_Next(Generator *, void **value);

// Yield a value from the generator
// Returns true if generator should continue, false for generator to exit PDQ
extern bool Generator_Yield(void *);

#endif