#ifndef __SHM_SOCKET_H__
#define __SHM_SOCKET_H__

#include "usg_common.h"
#include "usg_typedef.h"
#include "shm_queue.h"
#include "lock_free_queue.h"
#include <functional>

enum shm_socket_type_t
{
	SHM_SOCKET_STREAM = 1,
	SHM_SOCKET_DGRAM = 2
	
};
 
 

typedef struct shm_packet_t {
	int key;
	size_t size;
	void * buf;
	char uuid[64];

} shm_packet_t;




typedef struct shm_socket_t {
	shm_socket_type_t socket_type;
	// 本地key
	int key;
	bool force_bind;
	pthread_mutex_t mutex;

	LockFreeQueue<shm_packet_t> *queue;  //self queue
	LockFreeQueue<shm_packet_t> *remoteQueue; // peer queue
	std::map<std::string, shm_packet_t> recvbuf;
	

} shm_socket_t;

// typedef void (*recv_callback_fn)(void **sendbuf, int *sendsize);
typedef std::function<void(void **sendbuf, int *sendsize)> recv_callback_fn;

size_t shm_socket_remove_keys(int keys[], size_t length);

shm_socket_t *shm_open_socket(shm_socket_type_t socket_type);


int shm_close_socket(shm_socket_t * socket) ;


int shm_socket_bind(shm_socket_t * socket, int key) ;

int shm_socket_force_bind(shm_socket_t * socket, int key) ;
 
/**
 * @flags : BUS_NOWAIT_FLAG
 */
int shm_sendto(shm_socket_t *socket, const void *buf, const int size, const int key, const struct timespec * timeout = NULL, const int flags=0);

int shm_recvfrom(shm_socket_t *socket, void **buf, int *size, int *key,  const struct timespec * timeout = NULL,  int flags=0);

int shm_sendandrecv(shm_socket_t *socket, const void *send_buf, const int send_size, const int send_key, void **recv_buf, int *recv_size,  
	const struct timespec * timeout = NULL,  int flags = 0);

/**
 * @callback  void (*recv_callback_fn)(void **sendbuf, int *sendsize)
 *            sendbuf 和 sendsize是callbak_fn回调函数的返回值, 分别表示发送数据，和发送数据的大小。
 *
 */
int shm_recvandsend(shm_socket_t *sockt, void **recvbuf, int *recvsize, int *key, recv_callback_fn callback,
                    const struct timespec *timeout = NULL, int flag = 0);





#endif