/*
* Summary: Server IO, Not public!
*
* Copy: See Copyright for the status of this software.
*
* Author: Brian Aker
*/
#ifndef LIBMEMCACHED_MEMCACHED_IO_H
#define LIBMEMCACHED_MEMCACHED_IO_H
#if defined(BUILDING_LIBMEMCACHED)
#include "libmemcached/memcached.h"
#define MAX_UDP_DATAGRAM_LENGTH 1400
#define UDP_DATAGRAM_HEADER_LENGTH 8
#define UDP_REQUEST_ID_MSG_SIG_DIGITS 10
#define UDP_REQUEST_ID_THREAD_MASK 0xFFFF << UDP_REQUEST_ID_MSG_SIG_DIGITS
#define get_udp_datagram_request_id(A) ntohs((A)->request_id)
#define get_udp_datagram_seq_num(A) ntohs((A)->sequence_number)
#define get_udp_datagram_num_datagrams(A) ntohs((A)->num_datagrams)
#define get_msg_num_from_request_id(A) ( (A) & (~(UDP_REQUEST_ID_THREAD_MASK)) )
#define get_thread_id_from_request_id(A) ( (A) & (UDP_REQUEST_ID_THREAD_MASK) ) >> UDP_REQUEST_ID_MSG_SIG_DIGITS
#define generate_udp_request_thread_id(A) (A) << UDP_REQUEST_ID_MSG_SIG_DIGITS
#define UDP_REQUEST_ID_MAX_THREAD_ID get_thread_id_from_request_id(0xFFFF)
struct udp_datagram_header_st {
uint16_t request_id;
uint16_t sequence_number;
uint16_t num_datagrams;
uint16_t reserved;
};
ssize_t memcached_io_write(memcached_server_st *ptr,
const void *buffer, size_t length, char with_flush);
void memcached_io_reset(memcached_server_st *ptr);
memcached_return memcached_io_read(memcached_server_st *ptr,
void *buffer, size_t length, ssize_t *nread);
/* Read a line (terminated by '\n') into the buffer */
memcached_return memcached_io_readline(memcached_server_st *ptr,
char *buffer_ptr,
size_t size);
memcached_return memcached_io_close(memcached_server_st *ptr);
/* Read n bytes of data from the server and store them in dta */
memcached_return memcached_safe_read(memcached_server_st *ptr,
void *dta,
size_t size);
/* Read a single response from the server */
memcached_return memcached_read_one_response(memcached_server_st *ptr,
char *buffer, size_t buffer_length,
memcached_result_st *result);
memcached_return memcached_io_init_udp_header(memcached_server_st *ptr,
uint16_t thread_id);
memcached_server_st *memcached_io_get_readable_server(memcached_st *memc);
#endif /* BUILDING_LIBMEMCACHED */
#endif /* LIBMEMCACHED_MEMCACHED_IO_H */