git.m6w6.name Git - m6w6/libmemcached/blob - libmemcached/memcached_io.h

   1 /*
   2  * Summary: Server IO, Not public!
   3  *
   4  * Copy: See Copyright for the status of this software.
   5  *
   6  * Author: Brian Aker
   7  */
   8
   9 #ifndef LIBMEMCACHED_MEMCACHED_IO_H
  10 #define LIBMEMCACHED_MEMCACHED_IO_H
  11
  12 #if defined(BUILDING_LIBMEMCACHED)
  13
  14 #include "libmemcached/memcached.h"
  15
  16 #define MAX_UDP_DATAGRAM_LENGTH 1400
  17 #define UDP_DATAGRAM_HEADER_LENGTH 8
  18 #define UDP_REQUEST_ID_MSG_SIG_DIGITS 10
  19 #define UDP_REQUEST_ID_THREAD_MASK 0xFFFF << UDP_REQUEST_ID_MSG_SIG_DIGITS
  20 #define get_udp_datagram_request_id(A) ntohs((A)->request_id)
  21 #define get_udp_datagram_seq_num(A) ntohs((A)->sequence_number)
  22 #define get_udp_datagram_num_datagrams(A) ntohs((A)->num_datagrams)
  23 #define get_msg_num_from_request_id(A) ( (A) & (~(UDP_REQUEST_ID_THREAD_MASK)) )
  24 #define get_thread_id_from_request_id(A) ( (A) & (UDP_REQUEST_ID_THREAD_MASK) ) >> UDP_REQUEST_ID_MSG_SIG_DIGITS
  25 #define generate_udp_request_thread_id(A) (A) << UDP_REQUEST_ID_MSG_SIG_DIGITS
  26 #define UDP_REQUEST_ID_MAX_THREAD_ID get_thread_id_from_request_id(0xFFFF)
  27
  28 struct udp_datagram_header_st {
  29   uint16_t request_id;
  30   uint16_t sequence_number;
  31   uint16_t num_datagrams;
  32   uint16_t reserved;
  33 };
  34
  35 ssize_t memcached_io_write(memcached_server_st *ptr,
  36                            const void *buffer, size_t length, char with_flush);
  37 void memcached_io_reset(memcached_server_st *ptr);
  38 memcached_return memcached_io_read(memcached_server_st *ptr,
  39                                    void *buffer, size_t length, ssize_t *nread);
  40 /* Read a line (terminated by '\n') into the buffer */
  41 memcached_return memcached_io_readline(memcached_server_st *ptr,
  42                                        char *buffer_ptr,
  43                                        size_t size);
  44 memcached_return memcached_io_close(memcached_server_st *ptr);
  45 /* Read n bytes of data from the server and store them in dta */
  46 memcached_return memcached_safe_read(memcached_server_st *ptr,
  47                                      void *dta,
  48                                      size_t size);
  49 /* Read a single response from the server */
  50 memcached_return memcached_read_one_response(memcached_server_st *ptr,
  51                                              char *buffer, size_t buffer_length,
  52                                              memcached_result_st *result);
  53 memcached_return memcached_io_init_udp_header(memcached_server_st *ptr,
  54                                               uint16_t thread_id);
  55
  56 memcached_server_st *memcached_io_get_readable_server(memcached_st *memc);
  57
  58 #endif /* BUILDING_LIBMEMCACHED */
  59 #endif /* LIBMEMCACHED_MEMCACHED_IO_H */