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   1 /* LibMemcached
   2  * Copyright (C) 2006-2009 Brian Aker
   3  * All rights reserved.
   4  *
   5  * Use and distribution licensed under the BSD license.  See
   6  * the COPYING file in the parent directory for full text.
   7  *
   8  * Summary: String structure used for libmemcached.
   9  *
  10  */
  11
  12 #ifndef __LIBMEMCACHED_SERVER_H__
  13 #define __LIBMEMCACHED_SERVER_H__
  14
  15
  16 struct memcached_server_st {
  17   struct {
  18     bool is_allocated MEMCACHED_BITFIELD;
  19     bool is_initialized MEMCACHED_BITFIELD;
  20     bool sockaddr_inited MEMCACHED_BITFIELD;
  21   } options;
  22   uint32_t number_of_hosts;
  23   uint32_t cursor_active;
  24   in_port_t port;
  25   int cached_errno;
  26   int fd;
  27   uint32_t io_bytes_sent; /* # bytes sent since last read */
  28   uint32_t server_failure_counter;
  29   uint32_t weight;
  30   struct { // Place any "state" sort variables in here.
  31     bool is_corked;
  32   } state;
  33   uint8_t major_version;
  34   uint8_t micro_version;
  35   uint8_t minor_version;
  36   memcached_connection_t type;
  37   char *read_ptr;
  38   char *cached_server_error;
  39   size_t read_buffer_length;
  40   size_t read_data_length;
  41   size_t write_buffer_offset;
  42   struct addrinfo *address_info;
  43   time_t next_retry;
  44   const memcached_st *root;
  45   uint64_t limit_maxbytes;
  46   char read_buffer[MEMCACHED_MAX_BUFFER];
  47   char write_buffer[MEMCACHED_MAX_BUFFER];
  48   char hostname[NI_MAXHOST];
  49 };
  50
  51
  52 #ifdef __cplusplus
  53 extern "C" {
  54 #endif
  55
  56 LIBMEMCACHED_API
  57 memcached_return_t memcached_server_cursor(memcached_st *ptr,
  58                                            memcached_server_fn *callback,
  59                                            void *context,
  60                                            uint32_t number_of_callbacks);
  61
  62 LIBMEMCACHED_API
  63 memcached_server_st *memcached_server_by_key(memcached_st *ptr,
  64                                              const char *key,
  65                                              size_t key_length,
  66                                              memcached_return_t *error);
  67
  68 LIBMEMCACHED_API
  69 const char *memcached_server_error(memcached_server_st *ptr);
  70
  71 LIBMEMCACHED_API
  72 void memcached_server_error_reset(memcached_server_st *ptr);
  73
  74 /* These should not currently be used by end users */
  75 /* TODO: Is the above comment valid? If so, how can we unit test these if they
  76  * aren't exported. If not, we should remove the comment */
  77
  78 LIBMEMCACHED_LOCAL
  79 memcached_server_st *memcached_server_create_with(const memcached_st *memc,
  80                                                   memcached_server_st *host,
  81                                                   const char *hostname,
  82                                                   in_port_t port,
  83                                                   uint32_t weight,
  84                                                   memcached_connection_t type);
  85
  86 LIBMEMCACHED_API
  87 void memcached_server_free(memcached_server_st *ptr);
  88
  89 LIBMEMCACHED_LOCAL
  90 memcached_server_st *memcached_server_clone(memcached_server_st *destination,
  91                                             const memcached_server_st *source);
  92
  93 LIBMEMCACHED_API
  94 memcached_return_t memcached_server_remove(memcached_server_st *st_ptr);
  95
  96 LIBMEMCACHED_API
  97 memcached_server_st *memcached_server_get_last_disconnect(memcached_st *ptr);
  98
  99
 100 LIBMEMCACHED_API
 101 memcached_return_t memcached_server_add_udp(memcached_st *ptr,
 102                                             const char *hostname,
 103                                             in_port_t port);
 104 LIBMEMCACHED_API
 105 memcached_return_t memcached_server_add_unix_socket(memcached_st *ptr,
 106                                                     const char *filename);
 107 LIBMEMCACHED_API
 108 memcached_return_t memcached_server_add(memcached_st *ptr,
 109                                         const char *hostname, in_port_t port);
 110
 111 LIBMEMCACHED_API
 112 memcached_return_t memcached_server_add_udp_with_weight(memcached_st *ptr,
 113                                                         const char *hostname,
 114                                                         in_port_t port,
 115                                                         uint32_t weight);
 116 LIBMEMCACHED_API
 117 memcached_return_t memcached_server_add_unix_socket_with_weight(memcached_st *ptr,
 118                                                                 const char *filename,
 119                                                                 uint32_t weight);
 120 LIBMEMCACHED_API
 121 memcached_return_t memcached_server_add_with_weight(memcached_st *ptr, const char *hostname,
 122                                                     in_port_t port,
 123                                                     uint32_t weight);
 124 /* Server List Public functions */
 125
 126 LIBMEMCACHED_API
 127 void memcached_server_list_free(memcached_server_st *ptr);
 128
 129
 130 LIBMEMCACHED_API
 131 memcached_return_t memcached_server_push(memcached_st *ptr, memcached_server_st *list);
 132
 133 LIBMEMCACHED_API
 134 memcached_server_st *memcached_server_list_append(memcached_server_st *ptr,
 135                                                   const char *hostname,
 136                                                   in_port_t port,
 137                                                   memcached_return_t *error);
 138 LIBMEMCACHED_API
 139 memcached_server_st *memcached_server_list_append_with_weight(memcached_server_st *ptr,
 140                                                               const char *hostname,
 141                                                               in_port_t port,
 142                                                               uint32_t weight,
 143                                                               memcached_return_t *error);
 144 LIBMEMCACHED_API
 145 unsigned int memcached_server_list_count(memcached_server_st *ptr);
 146
 147 // Local Only Inline
 148 static inline uint32_t memcached_servers_count(memcached_server_st *servers)
 149 {
 150   return servers->number_of_hosts;
 151 }
 152
 153 // Local Only Inline
 154 static inline uint32_t memcached_servers_set_count(memcached_server_st *servers, uint32_t count)
 155 {
 156   return servers->number_of_hosts= count;
 157 }
 158
 159
 160 #define memcached_server_count(A) (A)->number_of_hosts
 161 #define memcached_server_name(A,B) (B).hostname
 162 #define memcached_server_port(A,B) (B).port
 163 #define memcached_server_list(A) (A)->servers
 164 #define memcached_server_list_set(A,B) (A)->servers=(B)
 165 #define memcached_server_response_count(A) (A)->cursor_active
 166
 167 #ifdef __cplusplus
 168 } // extern "C"
 169 #endif
 170
 171 #endif /* __LIBMEMCACHED_SERVER_H__ */