promise.h

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#ifndef UEL_PROMISE_H
#define UEL_PROMISE_H
 
#include "uevloop/config.h"
#include "uevloop/utils/closure.h"
#include "uevloop/utils/object-pool.h"
 
enum uel_promise_state {
    UEL_PROMISE_PENDING , 
    UEL_PROMISE_RESOLVED, 
    UEL_PROMISE_REJECTED, 
};
typedef enum uel_promise_state uel_promise_state_t;
 
typedef struct uel_promise_segment uel_promise_segment_t;
struct uel_promise_segment {
    uel_closure_t resolve;
    uel_closure_t reject;
    uel_promise_segment_t *next;
};
 
struct uel_promise_store;
 
typedef struct uel_promise uel_promise_t;
struct uel_promise {
    struct uel_promise_store *source;
    uel_promise_state_t state;
    void *value;
    uel_promise_segment_t *first_segment;
    uel_promise_segment_t *last_segment;
};
 
typedef struct uel_promise_store uel_promise_store_t;
struct uel_promise_store {
    uel_objpool_t *promise_pool;
    uel_objpool_t *segment_pool;
};
 
uel_promise_store_t uel_promise_store_create(
    uel_objpool_t *promise_pool,
    uel_objpool_t *segment_pool
);
 
uel_promise_t *uel_promise_create(uel_promise_store_t *store, uel_closure_t closure);
 
void uel_promise_destroy(uel_promise_t *promise);
 
void uel_promise_then(uel_promise_t *promise, uel_closure_t resolve);
 
void uel_promise_catch(uel_promise_t *promise, uel_closure_t reject);
 
void uel_promise_always(uel_promise_t *promise, uel_closure_t always);
 
void uel_promise_after(
    uel_promise_t *promise,
    uel_closure_t resolve,
    uel_closure_t reject
);
 
void uel_promise_resolve(uel_promise_t *promise, void *value);
 
void uel_promise_reject(uel_promise_t *promise, void *value);
 
void uel_promise_resettle(
    uel_promise_t *promise,
    uel_promise_state_t state,
    void *value
);
 
uel_closure_t uel_promise_resolver(uel_promise_t *promise);
 
uel_closure_t uel_promise_rejecter(uel_promise_t *promise);
 
uel_closure_t uel_promise_destroyer(uel_promise_t *promise);
 
#ifdef UEL_PROMISE_SHORTCUTS
 
#define THEN    uel_promise_then
#define CATCH   uel_promise_catch
#define AFTER   uel_promise_after
#define ALWAYS  uel_promise_always
 
 
#endif /* UEL_PROMISE_SHORTCUTS */
 
#endif /* end of include guard: UEL_PROMISE_H */