#ifndef _DS_READER_INNER_H_
#define _DS_READER_INNER_H_

#include <pthread.h>

#include "dataserver_reader.h"
#include "list.h"

#ifdef __cplusplus
extern "C" {
#endif

typedef struct {
    struct list_head head;
    ds_data_callback_fn_t fn;
    void *priv;
} ds_data_callback_t;

typedef struct {
    struct list_head head;

    #define MAX_SIZE_DEVNAME 256
    char devname[MAX_SIZE_DEVNAME];

    int fd;
    int evtfd;

    struct list_head callback_list;
    /*
     * The callback will be added into wait list first,
     * reader task decides when to merge
     * the waiting callbacks into the main list.
     * To avoid partial data pkt in the buffer.
     */
    struct list_head callback_wait_list;
    pthread_mutex_t callback_list_lock;

    pthread_t thread;
    int running;

    void* (*read_task)(void *);

    size_t priv;
} reader_inst_t;

typedef void* (*ds_read_task_t)(void *);
typedef int (*ds_read_set_t)(reader_inst_t *inst, const char *settings);
typedef int (*ds_read_close_t)(reader_inst_t *inst);

typedef struct {
    ds_read_task_t task;
    ds_read_set_t set;
    ds_read_close_t close;
} ds_reader_t;

typedef ds_reader_t* (*ds_reader_checker_t)(const char *devname);

#ifdef BUILD_FOR_ANDROID
#define _ds_readers_section __attribute__((retain, used, section("ds_readers")))
#else
#define _ds_readers_section __attribute__((used, section("ds_readers")))
#endif
#define REG_DS_READER(_func_) static ds_reader_checker_t _fn_##_func_ _ds_readers_section = _func_

extern size_t __start_ds_readers;
extern size_t __stop_ds_readers;

#define DS_READ_TASKS_CHECKER_START ((ds_reader_checker_t *)&__start_ds_readers)
#define DS_READ_TASKS_CHECKER_STOP  ((ds_reader_checker_t *)&__stop_ds_readers)

#ifdef __cplusplus
}
#endif
#endif