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

   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: interface for memcached server
   9  * Description: main include file for libmemcached
  10  *
  11  */
  12
  13 #ifndef __MEMCACHED_H__
  14 #define __MEMCACHED_H__
  15
  16 #include <stdlib.h>
  17 #include <inttypes.h>
  18
  19 #if !defined(__cplusplus)
  20 # include <stdbool.h>
  21 #endif
  22
  23 #include <sys/types.h>
  24 #include <netinet/in.h>
  25
  26 #include <libmemcached/visibility.h>
  27 #include <libmemcached/memcached_configure.h>
  28 #include <libmemcached/constants.h>
  29 #include <libmemcached/types.h>
  30 #include <libmemcached/string.h>
  31 // Everything above this line must be in the order specified.
  32 #include <libmemcached/behavior.h>
  33 #include <libmemcached/callback.h>
  34 #include <libmemcached/get.h>
  35 #include <libmemcached/result.h>
  36 #include <libmemcached/server.h>
  37 #include <libmemcached/storage.h>
  38
  39 #ifdef __cplusplus
  40 extern "C" {
  41 #endif
  42
  43 #define MEMCACHED_VERSION_STRING_LENGTH 24
  44
  45 struct memcached_analysis_st {
  46   uint32_t average_item_size;
  47   uint32_t longest_uptime;
  48   uint32_t least_free_server;
  49   uint32_t most_consumed_server;
  50   uint32_t oldest_server;
  51   double pool_hit_ratio;
  52   uint64_t most_used_bytes;
  53   uint64_t least_remaining_bytes;
  54 };
  55
  56 struct memcached_stat_st {
  57   uint32_t connection_structures;
  58   uint32_t curr_connections;
  59   uint32_t curr_items;
  60   uint32_t pid;
  61   uint32_t pointer_size;
  62   uint32_t rusage_system_microseconds;
  63   uint32_t rusage_system_seconds;
  64   uint32_t rusage_user_microseconds;
  65   uint32_t rusage_user_seconds;
  66   uint32_t threads;
  67   uint32_t time;
  68   uint32_t total_connections;
  69   uint32_t total_items;
  70   uint32_t uptime;
  71   uint64_t bytes;
  72   uint64_t bytes_read;
  73   uint64_t bytes_written;
  74   uint64_t cmd_get;
  75   uint64_t cmd_set;
  76   uint64_t evictions;
  77   uint64_t get_hits;
  78   uint64_t get_misses;
  79   uint64_t limit_maxbytes;
  80   char version[MEMCACHED_VERSION_STRING_LENGTH];
  81 };
  82
  83 struct memcached_st {
  84   struct {
  85     bool is_allocated:1;
  86     bool is_initialized:1;
  87     bool is_purging:1;
  88   } options;
  89   memcached_server_distribution_t distribution;
  90   memcached_hash_t hash;
  91   uint32_t continuum_points_counter;
  92   memcached_server_st *hosts;
  93   memcached_server_st *last_disconnected_server;
  94   int32_t snd_timeout;
  95   int32_t rcv_timeout;
  96   uint32_t server_failure_limit;
  97   uint32_t io_msg_watermark;
  98   uint32_t io_bytes_watermark;
  99   uint32_t io_key_prefetch;
 100   uint32_t number_of_hosts;
 101   uint32_t cursor_server;
 102   int cached_errno;
 103   struct {
 104     bool no_block:1;
 105     bool tcp_nodelay:1;
 106     bool reuse_memory:1;
 107     bool use_md5:1;
 108     bool use_crc:1;
 109     bool use_cache_lookups:1;
 110     bool support_cas:1;
 111     bool buffer_requests:1;
 112     bool use_sort_hosts:1;
 113     bool verify_key:1;
 114     bool ketama_weighted:1;
 115     bool binary_protocol:1;
 116     bool hash_with_prefix_key:1;
 117     bool no_reply:1;
 118     bool use_udp:1;
 119     bool auto_eject_hosts:1;
 120     bool randomize_replica_read:1;
 121   } flags;
 122   int32_t poll_timeout;
 123   int32_t connect_timeout;
 124   int32_t retry_timeout;
 125   uint32_t continuum_count;
 126   int send_size;
 127   int recv_size;
 128   void *user_data;
 129   time_t next_distribution_rebuild;
 130   size_t prefix_key_length;
 131   memcached_hash_t distribution_hash;
 132   memcached_result_st result;
 133   memcached_continuum_item_st *continuum;
 134   memcached_clone_fn on_clone;
 135   memcached_cleanup_fn on_cleanup;
 136   memcached_free_fn call_free;
 137   memcached_malloc_fn call_malloc;
 138   memcached_realloc_fn call_realloc;
 139   memcached_calloc_fn call_calloc;
 140   memcached_trigger_key_fn get_key_failure;
 141   memcached_trigger_delete_key_fn delete_trigger;
 142   char prefix_key[MEMCACHED_PREFIX_KEY_MAX_SIZE];
 143   uint32_t number_of_replicas;
 144   memcached_callback_st *callbacks;
 145 };
 146
 147 LIBMEMCACHED_API
 148 memcached_return_t memcached_version(memcached_st *ptr);
 149
 150 /* Public API */
 151
 152 LIBMEMCACHED_API
 153 const char * memcached_lib_version(void);
 154
 155 LIBMEMCACHED_API
 156 memcached_st *memcached_create(memcached_st *ptr);
 157 LIBMEMCACHED_API
 158 void memcached_free(memcached_st *ptr);
 159 LIBMEMCACHED_API
 160 memcached_st *memcached_clone(memcached_st *clone, memcached_st *ptr);
 161
 162 LIBMEMCACHED_API
 163 memcached_return_t memcached_delete(memcached_st *ptr, const char *key, size_t key_length,
 164                                   time_t expiration);
 165 LIBMEMCACHED_API
 166 memcached_return_t memcached_increment(memcached_st *ptr,
 167                                      const char *key, size_t key_length,
 168                                      uint32_t offset,
 169                                      uint64_t *value);
 170 LIBMEMCACHED_API
 171 memcached_return_t memcached_decrement(memcached_st *ptr,
 172                                      const char *key, size_t key_length,
 173                                      uint32_t offset,
 174                                      uint64_t *value);
 175
 176 LIBMEMCACHED_API
 177 memcached_return_t memcached_increment_by_key(memcached_st *ptr,
 178                                             const char *master_key, size_t master_key_length,
 179                                             const char *key, size_t key_length,
 180                                             uint64_t offset,
 181                                             uint64_t *value);
 182
 183 LIBMEMCACHED_API
 184 memcached_return_t memcached_decrement_by_key(memcached_st *ptr,
 185                                             const char *master_key, size_t master_key_length,
 186                                             const char *key, size_t key_length,
 187                                             uint64_t offset,
 188                                             uint64_t *value);
 189
 190 LIBMEMCACHED_API
 191 memcached_return_t memcached_increment_with_initial(memcached_st *ptr,
 192                                                   const char *key,
 193                                                   size_t key_length,
 194                                                   uint64_t offset,
 195                                                   uint64_t initial,
 196                                                   time_t expiration,
 197                                                   uint64_t *value);
 198 LIBMEMCACHED_API
 199 memcached_return_t memcached_decrement_with_initial(memcached_st *ptr,
 200                                                   const char *key,
 201                                                   size_t key_length,
 202                                                   uint64_t offset,
 203                                                   uint64_t initial,
 204                                                   time_t expiration,
 205                                                   uint64_t *value);
 206 LIBMEMCACHED_API
 207 memcached_return_t memcached_increment_with_initial_by_key(memcached_st *ptr,
 208                                                          const char *master_key,
 209                                                          size_t master_key_length,
 210                                                          const char *key,
 211                                                          size_t key_length,
 212                                                          uint64_t offset,
 213                                                          uint64_t initial,
 214                                                          time_t expiration,
 215                                                          uint64_t *value);
 216 LIBMEMCACHED_API
 217 memcached_return_t memcached_decrement_with_initial_by_key(memcached_st *ptr,
 218                                                          const char *master_key,
 219                                                          size_t master_key_length,
 220                                                          const char *key,
 221                                                          size_t key_length,
 222                                                          uint64_t offset,
 223                                                          uint64_t initial,
 224                                                          time_t expiration,
 225                                                          uint64_t *value);
 226 LIBMEMCACHED_API
 227 void memcached_stat_free(memcached_st *, memcached_stat_st *);
 228
 229 LIBMEMCACHED_API
 230 memcached_stat_st *memcached_stat(memcached_st *ptr, char *args, memcached_return_t *error);
 231
 232 LIBMEMCACHED_API
 233 memcached_return_t memcached_stat_servername(memcached_stat_st *memc_stat, char *args,
 234                                              const char *hostname, in_port_t port);
 235
 236 LIBMEMCACHED_API
 237 memcached_return_t memcached_flush(memcached_st *ptr, time_t expiration);
 238
 239 LIBMEMCACHED_API
 240 memcached_return_t memcached_verbosity(memcached_st *ptr, unsigned int verbosity);
 241
 242 LIBMEMCACHED_API
 243 void memcached_quit(memcached_st *ptr);
 244
 245 LIBMEMCACHED_API
 246 const char *memcached_strerror(memcached_st *ptr, memcached_return_t rc);
 247
 248 /* The two public hash bits */
 249 LIBMEMCACHED_API
 250 uint32_t memcached_generate_hash_value(const char *key, size_t key_length, memcached_hash_t hash_algorithm);
 251
 252 LIBMEMCACHED_API
 253 uint32_t memcached_generate_hash(memcached_st *ptr, const char *key, size_t key_length);
 254
 255 LIBMEMCACHED_API
 256 memcached_return_t memcached_flush_buffers(memcached_st *mem);
 257
 258 /* Server Public functions */
 259
 260 LIBMEMCACHED_API
 261 memcached_return_t memcached_server_add_udp(memcached_st *ptr,
 262                                           const char *hostname,
 263                                           in_port_t port);
 264 LIBMEMCACHED_API
 265 memcached_return_t memcached_server_add_unix_socket(memcached_st *ptr,
 266                                                   const char *filename);
 267 LIBMEMCACHED_API
 268 memcached_return_t memcached_server_add(memcached_st *ptr,
 269                                         const char *hostname, in_port_t port);
 270
 271 LIBMEMCACHED_API
 272 memcached_return_t memcached_server_add_udp_with_weight(memcached_st *ptr,
 273                                                       const char *hostname,
 274                                                       in_port_t port,
 275                                                       uint32_t weight);
 276 LIBMEMCACHED_API
 277 memcached_return_t memcached_server_add_unix_socket_with_weight(memcached_st *ptr,
 278                                                               const char *filename,
 279                                                               uint32_t weight);
 280 LIBMEMCACHED_API
 281 memcached_return_t memcached_server_add_with_weight(memcached_st *ptr, const char *hostname,
 282                                                   in_port_t port,
 283                                                   uint32_t weight);
 284 LIBMEMCACHED_API
 285 void memcached_server_list_free(memcached_server_st *ptr);
 286
 287 LIBMEMCACHED_API
 288 memcached_return_t memcached_server_push(memcached_st *ptr, memcached_server_st *list);
 289
 290 LIBMEMCACHED_API
 291 memcached_server_st *memcached_server_list_append(memcached_server_st *ptr,
 292                                                   const char *hostname,
 293                                                   in_port_t port,
 294                                                   memcached_return_t *error);
 295 LIBMEMCACHED_API
 296 memcached_server_st *memcached_server_list_append_with_weight(memcached_server_st *ptr,
 297                                                               const char *hostname,
 298                                                               in_port_t port,
 299                                                               uint32_t weight,
 300                                                               memcached_return_t *error);
 301 LIBMEMCACHED_API
 302 unsigned int memcached_server_list_count(memcached_server_st *ptr);
 303
 304 LIBMEMCACHED_API
 305 memcached_server_st *memcached_servers_parse(const char *server_strings);
 306
 307 LIBMEMCACHED_API
 308 char *memcached_stat_get_value(memcached_st *ptr, memcached_stat_st *memc_stat,
 309                                const char *key, memcached_return_t *error);
 310 LIBMEMCACHED_API
 311 char ** memcached_stat_get_keys(memcached_st *ptr, memcached_stat_st *memc_stat,
 312                                 memcached_return_t *error);
 313
 314 LIBMEMCACHED_API
 315 memcached_return_t memcached_delete_by_key(memcached_st *ptr,
 316                                            const char *master_key, size_t master_key_length,
 317                                            const char *key, size_t key_length,
 318                                            time_t expiration);
 319
 320 LIBMEMCACHED_API
 321 memcached_return_t memcached_fetch_execute(memcached_st *ptr,
 322                                            memcached_execute_fn *callback,
 323                                            void *context,
 324                                            unsigned int number_of_callbacks);
 325
 326 LIBMEMCACHED_API
 327 memcached_return_t memcached_dump(memcached_st *ptr, memcached_dump_fn *function, void *context, uint32_t number_of_callbacks);
 328
 329
 330 LIBMEMCACHED_API
 331 memcached_return_t memcached_set_memory_allocators(memcached_st *ptr,
 332                                                    memcached_malloc_fn mem_malloc,
 333                                                    memcached_free_fn mem_free,
 334                                                    memcached_realloc_fn mem_realloc,
 335                                                    memcached_calloc_fn mem_calloc);
 336
 337 LIBMEMCACHED_API
 338 void memcached_get_memory_allocators(memcached_st *ptr,
 339                                      memcached_malloc_fn *mem_malloc,
 340                                      memcached_free_fn *mem_free,
 341                                      memcached_realloc_fn *mem_realloc,
 342                                      memcached_calloc_fn *mem_calloc);
 343
 344 LIBMEMCACHED_API
 345 void *memcached_get_user_data(memcached_st *ptr);
 346 LIBMEMCACHED_API
 347 void *memcached_set_user_data(memcached_st *ptr, void *data);
 348
 349 LIBMEMCACHED_LOCAL
 350 memcached_return_t run_distribution(memcached_st *ptr);
 351
 352 #define memcached_is_allocated(__object) ((__object)->options.is_allocated)
 353 #define memcached_is_initialized(__object) ((__object)->options.is_initialized)
 354
 355 #ifdef __cplusplus
 356 }
 357 #endif
 358
 359
 360 #endif /* __MEMCACHED_H__ */