#ifndef CX_ZIVUOS_TASK_H_INCLUDED
#define CX_ZIVUOS_TASK_H_INCLUDED

#include "systypes.h"

/** 
 * @brief That enum store task type.
 *
 * Task is container for more than one type of logic. 
 * - Coroutine is function which run in loop. Could not being scheduled. 
 * - Oneshot is coroutine which is executed only once. 
 * - Process is task which could being scheduled.
 */
typedef enum zv_task_type_e {
    ZV_COROUTINE_TASK,
    ZV_PROCESS_TASK,
    ZV_ONESHOT_TASK
} zv_task_type_t;

/**
 * @brief That enum store task state.
 */
typedef enum zv_state_e {
    ZV_KILLED,
    ZV_RUNNING,
    ZV_READY,
    ZV_SLEEP
} zv_state_t;

/* That declaration is required for worker. */
struct zv_kernel_s;

/**
 * @brief That is worker, which is function for task.
 */
typedef zv_state_t (*zv_worker_t) (struct zv_kernel_t *, zv_pid_t);

typedef struct zv_coroutine_s {
    zv_worker_t worker;
    zv_universal_t param;
} zv_coroutine_t;

typedef struct zv_process_s {
} zv_process_t;

typedef struct zv_oneshot_s {
    zv_worker_t worker;
    zv_universal_t param;
} zv_oneshot_t;

typedef union zv_task_selector_u {
    zv_coroutine_t coroutine;
    zv_process_t process;
    zv_oneshot_t oneshot;
} zv_task_selector_t;

typedef struct zv_task_s {
    zv_pid_t pid;
    zv_state_t state;
    zv_priority_t priority;
    zv_task_type_t type;

    zv_task_selector_t selector;
} zv_task_t;

#endif